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f4651457-4c87-4aea-b22f-133937a582e9
time-dependent-entity-embedding-is-not-all
null
null
https://aclanthology.org/2021.emnlp-main.639
https://aclanthology.org/2021.emnlp-main.639.pdf
Time-dependent Entity Embedding is not All You Need: A Re-evaluation of Temporal Knowledge Graph Completion Models under a Unified Framework
Various temporal knowledge graph (KG) completion models have been proposed in the recent literature. The models usually contain two parts, a temporal embedding layer and a score function derived from existing static KG modeling approaches. Since the approaches differ along several dimensions, including different score functions and training strategies, the individual contributions of different temporal embedding techniques to model performance are not always clear. In this work, we systematically study six temporal embedding approaches and empirically quantify their performance across a wide range of configurations with about 3000 experiments and 13159 GPU hours. We classify the temporal embeddings into two classes: (1) timestamp embeddings and (2) time-dependent entity embeddings. Despite the common belief that the latter is more expressive, an extensive experimental study shows that timestamp embeddings can achieve on-par or even better performance with significantly fewer parameters. Moreover, we find that when trained appropriately, the relative performance differences between various temporal embeddings often shrink and sometimes even reverse when compared to prior results. For example, TTransE (CITATION), one of the first temporal KG models, can outperform more recent architectures on ICEWS datasets. To foster further research, we provide the first unified open-source framework for temporal KG completion models with full composability, where temporal embeddings, score functions, loss functions, regularizers, and the explicit modeling of reciprocal relations can be combined arbitrarily.
['Volker Tresp', 'Yunpu Ma', 'Gengyuan Zhang', 'Zhen Han']
null
null
null
null
emnlp-2021-11
['temporal-knowledge-graph-completion']
['knowledge-base']
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[8.625533103942871, 7.841413497924805]
c25667a7-5283-49c0-930c-819479e0122a
multi-agent-path-finding-with-deadlines-1
1805.04961
null
http://arxiv.org/abs/1805.04961v1
http://arxiv.org/pdf/1805.04961v1.pdf
Multi-Agent Path Finding with Deadlines: Preliminary Results
We formalize the problem of multi-agent path finding with deadlines (MAPF-DL). The objective is to maximize the number of agents that can reach their given goal vertices from their given start vertices within a given deadline, without colliding with each other. We first show that the MAPF-DL problem is NP-hard to solve optimally. We then present an optimal MAPF-DL algorithm based on a reduction of the MAPF-DL problem to a flow problem and a subsequent compact integer linear programming formulation of the resulting reduced abstracted multi-commodity flow network.
['Ariel Felner', 'Sven Koenig', 'Glenn Wagner', 'T. K. Satish Kumar', 'Jiaoyang Li', 'Hang Ma']
2018-05-13
null
null
null
null
['multi-agent-path-finding']
['playing-games']
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[4.977317810058594, 1.8222259283065796]
518666c7-e8be-484e-b56d-653a98faffea
online-and-offline-handwritten-chinese
1606.05763
null
http://arxiv.org/abs/1606.05763v1
http://arxiv.org/pdf/1606.05763v1.pdf
Online and Offline Handwritten Chinese Character Recognition: A Comprehensive Study and New Benchmark
Recent deep learning based methods have achieved the state-of-the-art performance for handwritten Chinese character recognition (HCCR) by learning discriminative representations directly from raw data. Nevertheless, we believe that the long-and-well investigated domain-specific knowledge should still help to boost the performance of HCCR. By integrating the traditional normalization-cooperated direction-decomposed feature map (directMap) with the deep convolutional neural network (convNet), we are able to obtain new highest accuracies for both online and offline HCCR on the ICDAR-2013 competition database. With this new framework, we can eliminate the needs for data augmentation and model ensemble, which are widely used in other systems to achieve their best results. This makes our framework to be efficient and effective for both training and testing. Furthermore, although directMap+convNet can achieve the best results and surpass human-level performance, we show that writer adaptation in this case is still effective. A new adaptation layer is proposed to reduce the mismatch between training and test data on a particular source layer. The adaptation process can be efficiently and effectively implemented in an unsupervised manner. By adding the adaptation layer into the pre-trained convNet, it can adapt to the new handwriting styles of particular writers, and the recognition accuracy can be further improved consistently and significantly. This paper gives an overview and comparison of recent deep learning based approaches for HCCR, and also sets new benchmarks for both online and offline HCCR.
['Cheng-Lin Liu', 'Xu-Yao Zhang', 'Yoshua Bengio']
2016-06-18
null
null
null
null
['offline-handwritten-chinese-character', 'offline-handwritten-chinese-character']
['computer-vision', 'natural-language-processing']
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[11.823775291442871, 2.591913938522339]
aa3216ba-3f78-4f51-a3e5-89dafedb231d
a-comparison-of-data-augmentation-techniques
2003.13502
null
https://arxiv.org/abs/2003.13502v2
https://arxiv.org/pdf/2003.13502v2.pdf
An Open-source Tool for Hyperspectral Image Augmentation in Tensorflow
Satellite imagery allows a plethora of applications ranging from weather forecasting to land surveying. The rapid development of computer vision systems could open new horizons to the utilization of satellite data due to the abundance of large volumes of data. However, current state-of-the-art computer vision systems mainly cater to applications that mainly involve natural images. While useful, those images exhibit a different distribution from satellite images in addition to having more spectral channels. This allows the use of pretrained deep learning models only in a subset of spectral channels that are equivalent to natural images thus discarding valuable information from other spectral channels. This calls for research effort to optimize deep learning models for satellite imagery to enable the assessment of their utility in the domain of remote sensing. Tensorflow tool allows for rapid prototyping and testing of deep learning models, however, its built-in image generator is designed to handle a maximum of four spectral channels. This manuscript introduces an open-source tool that allows the implementation of image augmentation for hyperspectral images in Tensorflow. Given how accessible and easy-to-use Tensorflow is, this tool would provide many researchers with the means to implement, test, and deploy deep learning models for remote sensing applications.
['Mohamed Abdelhack']
2020-03-30
null
null
null
null
['satellite-image-classification']
['computer-vision']
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[9.609736442565918, -1.5363012552261353]
8e06f89c-b667-4776-8d94-6c2debb41e7c
iterative-potts-minimization-for-the-recovery
1812.00862
null
https://arxiv.org/abs/1812.00862v2
https://arxiv.org/pdf/1812.00862v2.pdf
Iterative Potts minimization for the recovery of signals with discontinuities from indirect measurements -- the multivariate case
Signals and images with discontinuities appear in many problems in such diverse areas as biology, medicine, mechanics, and electrical engineering. The concrete data are often discrete, indirect and noisy measurements of some quantities describing the signal under consideration. A frequent task is to find the segments of the signal or image which corresponds to finding the discontinuities or jumps in the data. Methods based on minimizing the piecewise constant Mumford-Shah functional -- whose discretized version is known as Potts functional -- are advantageous in this scenario, in particular, in connection with segmentation. However, due to their non-convexity, minimization of such functionals is challenging. In this paper we propose a new iterative minimization strategy for the multivariate Potts functional dealing with indirect, noisy measurements. We provide a convergence analysis and underpin our findings with numerical experiments.
['Lukas Kiefer', 'Andreas Weinmann', 'Martin Storath']
2018-12-03
null
null
null
null
['electrical-engineering']
['miscellaneous']
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[7.233721733093262, 3.973675489425659]
03987820-2690-4789-8fc3-8a50ae860aa7
beyond-the-camera-neural-networks-in-world
2003.05614
null
https://arxiv.org/abs/2003.05614v1
https://arxiv.org/pdf/2003.05614v1.pdf
Beyond the Camera: Neural Networks in World Coordinates
Eye movement and strategic placement of the visual field onto the retina, gives animals increased resolution of the scene and suppresses distracting information. This fundamental system has been missing from video understanding with deep networks, typically limited to 224 by 224 pixel content locked to the camera frame. We propose a simple idea, WorldFeatures, where each feature at every layer has a spatial transformation, and the feature map is only transformed as needed. We show that a network built with these WorldFeatures, can be used to model eye movements, such as saccades, fixation, and smooth pursuit, even in a batch setting on pre-recorded video. That is, the network can for example use all 224 by 224 pixels to look at a small detail one moment, and the whole scene the next. We show that typical building blocks, such as convolutions and pooling, can be adapted to support WorldFeatures using available tools. Experiments are presented on the Charades, Olympic Sports, and Caltech-UCSD Birds-200-2011 datasets, exploring action recognition, fine-grained recognition, and video stabilization.
['Karteek Alahari', 'Cordelia Schmid', 'Gunnar A. Sigurdsson', 'Abhinav Gupta']
2020-03-12
null
null
null
null
['video-stabilization']
['computer-vision']
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[9.2272367477417, 1.5494073629379272]
485cdace-4642-4dc3-a6c5-0dfa9dcd499f
beyond-instance-level-image-retrieval
null
null
http://openaccess.thecvf.com/content_cvpr_2017/html/Gordo_Beyond_Instance-Level_Image_CVPR_2017_paper.html
http://openaccess.thecvf.com/content_cvpr_2017/papers/Gordo_Beyond_Instance-Level_Image_CVPR_2017_paper.pdf
Beyond Instance-Level Image Retrieval: Leveraging Captions to Learn a Global Visual Representation for Semantic Retrieval
Querying with an example image is a simple and intuitive interface to retrieve information from a visual database. Most of the research in image retrieval has focused on the task of instance-level image retrieval, where the goal is to retrieve images that contain the same object instance as the query image. In this work we move beyond instance-level retrieval and consider the task of semantic image retrieval in complex scenes, where the goal is to retrieve images that share the same semantics as the query image. We show that, despite its subjective nature, the task of semantically ranking visual scenes is consistently implemented across a pool of human annotators. We also show that a similarity based on human-annotated region-level captions is highly correlated with the human ranking and constitutes a good computable surrogate. Following this observation, we learn a visual embedding of the images where the similarity in the visual space is correlated with their semantic similarity surrogate. We further extend our model to learn a joint embedding of visual and textual cues that allows one to query the database using a text modifier in addition to the query image, adapting the results to the modifier. Finally, our model can ground the ranking decisions by showing regions that contributed the most to the similarity between pairs of images, providing a visual explanation of the similarity.
['Diane Larlus', 'Albert Gordo']
2017-07-01
null
null
null
cvpr-2017-7
['semantic-retrieval']
['natural-language-processing']
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[10.777669906616211, 1.3182439804077148]
f5aef0f3-fdb1-46a5-827d-092e308d61e6
rethinking-the-objectives-of-vector-quantized
2212.03185
null
https://arxiv.org/abs/2212.03185v2
https://arxiv.org/pdf/2212.03185v2.pdf
Rethinking the Objectives of Vector-Quantized Tokenizers for Image Synthesis
Vector-Quantized (VQ-based) generative models usually consist of two basic components, i.e., VQ tokenizers and generative transformers. Prior research focuses on improving the reconstruction fidelity of VQ tokenizers but rarely examines how the improvement in reconstruction affects the generation ability of generative transformers. In this paper, we surprisingly find that improving the reconstruction fidelity of VQ tokenizers does not necessarily improve the generation. Instead, learning to compress semantic features within VQ tokenizers significantly improves generative transformers' ability to capture textures and structures. We thus highlight two competing objectives of VQ tokenizers for image synthesis: semantic compression and details preservation. Different from previous work that only pursues better details preservation, we propose Semantic-Quantized GAN (SeQ-GAN) with two learning phases to balance the two objectives. In the first phase, we propose a semantic-enhanced perceptual loss for better semantic compression. In the second phase, we fix the encoder and codebook, but enhance and finetune the decoder to achieve better details preservation. The proposed SeQ-GAN greatly improves VQ-based generative models and surpasses the GAN and Diffusion Models on both unconditional and conditional image generation. Our SeQ-GAN (364M) achieves Frechet Inception Distance (FID) of 6.25 and Inception Score (IS) of 140.9 on 256x256 ImageNet generation, a remarkable improvement over VIT-VQGAN (714M), which obtains 11.2 FID and 97.2 IS.
['Mike Zheng Shou', 'XiaoHu Qie', 'Ying Shan', 'Yixiao Ge', 'Xintao Wang', 'YuChao Gu']
2022-12-06
null
null
null
null
['conditional-image-generation']
['computer-vision']
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[11.515533447265625, -0.6174464225769043]
eeb3903a-e9a0-447a-92c8-4208fbab6e75
text-based-sentiment-analysis-and-music
1810.03031
null
http://arxiv.org/abs/1810.03031v1
http://arxiv.org/pdf/1810.03031v1.pdf
Text-based Sentiment Analysis and Music Emotion Recognition
Sentiment polarity of tweets, blog posts or product reviews has become highly attractive and is utilized in recommender systems, market predictions, business intelligence and more. Deep learning techniques are becoming top performers on analyzing such texts. There are however several problems that need to be solved for efficient use of deep neural networks on text mining and text polarity analysis. First, deep neural networks need to be fed with data sets that are big in size as well as properly labeled. Second, there are various uncertainties regarding the use of word embedding vectors: should they be generated from the same data set that is used to train the model or it is better to source them from big and popular collections? Third, to simplify model creation it is convenient to have generic neural network architectures that are effective and can adapt to various texts, encapsulating much of design complexity. This thesis addresses the above problems to provide methodological and practical insights for utilizing neural networks on sentiment analysis of texts and achieving state of the art results. Regarding the first problem, the effectiveness of various crowdsourcing alternatives is explored and two medium-sized and emotion-labeled song data sets are created utilizing social tags. To address the second problem, a series of experiments with large text collections of various contents and domains were conducted, trying word embeddings of various parameters. Regarding the third problem, a series of experiments involving convolution and max-pooling neural layers were conducted. Combining convolutions of words, bigrams, and trigrams with regional max-pooling layers in a couple of stacks produced the best results. The derived architecture achieves competitive performance on sentiment polarity analysis of movie, business and product reviews.
['Erion Çano']
2018-10-06
null
null
null
null
['music-emotion-recognition']
['music']
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[11.138564109802246, 7.050936222076416]
dd948ead-2b61-43e7-a14a-53e31fb6ba5b
classification-of-goods-using-text
2111.01663
null
https://arxiv.org/abs/2111.01663v1
https://arxiv.org/pdf/2111.01663v1.pdf
Classification of Goods Using Text Descriptions With Sentences Retrieval
The task of assigning and validating internationally accepted commodity code (HS code) to traded goods is one of the critical functions at the customs office. This decision is crucial to importers and exporters, as it determines the tariff rate. However, similar to court decisions made by judges, the task can be non-trivial even for experienced customs officers. The current paper proposes a deep learning model to assist this seemingly challenging HS code classification. Together with Korea Customs Service, we built a decision model based on KoELECTRA that suggests the most likely heading and subheadings (i.e., the first four and six digits) of the HS code. Evaluation on 129,084 past cases shows that the top-3 suggestions made by our model have an accuracy of 95.5% in classifying 265 subheadings. This promising result implies algorithms may reduce the time and effort taken by customs officers substantially by assisting the HS code classification task.
['Heeja Kim', 'Minsoo Song', 'Sungdae Ji', 'Yeonsoo Choi', 'Suyoung Yang', 'Soyeon Jung', 'Meeyoung Cha', 'Sungwon Park', 'Sihyun Kim', 'Sundong Kim', 'Eunji Lee']
2021-11-02
null
null
null
null
['code-classification']
['computer-code']
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[9.647439002990723, 6.143615245819092]
a4deac45-5d35-4632-ad24-96468087ab28
fully-autonomous-programming-with-large
2304.10423
null
https://arxiv.org/abs/2304.10423v1
https://arxiv.org/pdf/2304.10423v1.pdf
Fully Autonomous Programming with Large Language Models
Current approaches to program synthesis with Large Language Models (LLMs) exhibit a "near miss syndrome": they tend to generate programs that semantically resemble the correct answer (as measured by text similarity metrics or human evaluation), but achieve a low or even zero accuracy as measured by unit tests due to small imperfections, such as the wrong input or output format. This calls for an approach known as Synthesize, Execute, Debug (SED), whereby a draft of the solution is generated first, followed by a program repair phase addressing the failed tests. To effectively apply this approach to instruction-driven LLMs, one needs to determine which prompts perform best as instructions for LLMs, as well as strike a balance between repairing unsuccessful programs and replacing them with newly generated ones. We explore these trade-offs empirically, comparing replace-focused, repair-focused, and hybrid debug strategies, as well as different template-based and model-based prompt-generation techniques. We use OpenAI Codex as the LLM and Program Synthesis Benchmark 2 as a database of problem descriptions and tests for evaluation. The resulting framework outperforms both conventional usage of Codex without the repair phase and traditional genetic programming approaches.
['Leon Moonen', 'Aki Härmä', 'Anastasiia Grishina', 'Vadim Liventsev']
2023-04-20
null
null
null
null
['program-repair', 'program-synthesis', 'program-repair']
['computer-code', 'computer-code', 'reasoning']
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[7.861971378326416, 7.576777458190918]
0d16ccf9-269b-47b3-b888-2cd4048dcf59
enhancing-the-robustness-of-qmix-against
2307.00907
null
https://arxiv.org/abs/2307.00907v1
https://arxiv.org/pdf/2307.00907v1.pdf
Enhancing the Robustness of QMIX against State-adversarial Attacks
Deep reinforcement learning (DRL) performance is generally impacted by state-adversarial attacks, a perturbation applied to an agent's observation. Most recent research has concentrated on robust single-agent reinforcement learning (SARL) algorithms against state-adversarial attacks. Still, there has yet to be much work on robust multi-agent reinforcement learning. Using QMIX, one of the popular cooperative multi-agent reinforcement algorithms, as an example, we discuss four techniques to improve the robustness of SARL algorithms and extend them to multi-agent scenarios. To increase the robustness of multi-agent reinforcement learning (MARL) algorithms, we train models using a variety of attacks in this research. We then test the models taught using the other attacks by subjecting them to the corresponding attacks throughout the training phase. In this way, we organize and summarize techniques for enhancing robustness when used with MARL.
['Jiacun Wang', 'Ling Wang', 'Ziyuan Zhou', 'Guanjun Liu', 'Weiran Guo']
2023-07-03
null
null
null
null
['multi-agent-reinforcement-learning']
['methodology']
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[3.848306655883789, 2.2773351669311523]
d5fef5ec-ef20-4a59-a326-ed246c1ec5ae
fast-interactive-search-with-a-scale-free
2306.01814
null
https://arxiv.org/abs/2306.01814v1
https://arxiv.org/pdf/2306.01814v1.pdf
Fast Interactive Search with a Scale-Free Comparison Oracle
A comparison-based search algorithm lets a user find a target item $t$ in a database by answering queries of the form, ``Which of items $i$ and $j$ is closer to $t$?'' Instead of formulating an explicit query (such as one or several keywords), the user navigates towards the target via a sequence of such (typically noisy) queries. We propose a scale-free probabilistic oracle model called $\gamma$-CKL for such similarity triplets $(i,j;t)$, which generalizes the CKL triplet model proposed in the literature. The generalization affords independent control over the discriminating power of the oracle and the dimension of the feature space containing the items. We develop a search algorithm with provably exponential rate of convergence under the $\gamma$-CKL oracle, thanks to a backtracking strategy that deals with the unavoidable errors in updating the belief region around the target. We evaluate the performance of the algorithm both over the posited oracle and over several real-world triplet datasets. We also report on a comprehensive user study, where human subjects navigate a database of face portraits.
['Matthias Grossglauser', 'Lucas Maystre', 'Lars Klein', 'Daniyar Chumbalov']
2023-06-02
null
null
null
null
['navigate']
['reasoning']
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[6.59250020980835, 4.523097991943359]
b4c12f78-b24b-4778-83d4-b2d2c59d3c02
selective-encoding-for-abstractive-sentence
1704.07073
null
http://arxiv.org/abs/1704.07073v1
http://arxiv.org/pdf/1704.07073v1.pdf
Selective Encoding for Abstractive Sentence Summarization
We propose a selective encoding model to extend the sequence-to-sequence framework for abstractive sentence summarization. It consists of a sentence encoder, a selective gate network, and an attention equipped decoder. The sentence encoder and decoder are built with recurrent neural networks. The selective gate network constructs a second level sentence representation by controlling the information flow from encoder to decoder. The second level representation is tailored for sentence summarization task, which leads to better performance. We evaluate our model on the English Gigaword, DUC 2004 and MSR abstractive sentence summarization datasets. The experimental results show that the proposed selective encoding model outperforms the state-of-the-art baseline models.
['Nan Yang', 'Furu Wei', 'Qingyu Zhou', 'Ming Zhou']
2017-04-24
selective-encoding-for-abstractive-sentence-1
https://aclanthology.org/P17-1101
https://aclanthology.org/P17-1101.pdf
acl-2017-7
['abstractive-sentence-summarization']
['natural-language-processing']
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[12.502543449401855, 9.530150413513184]
a38f4621-7f74-4227-ad75-f5095eb9ca43
neutron-induced-single-event-effects-on
2102.00112
null
https://arxiv.org/abs/2102.00112v1
https://arxiv.org/pdf/2102.00112v1.pdf
Neutron-Induced, Single-Event Effects on Neuromorphic Event-based Vision Sensor: A First Step Towards Space Applications
This paper studies the suitability of neuromorphic event-based vision cameras for spaceflight, and the effects of neutron radiation on their performance. Neuromorphic event-based vision cameras are novel sensors that implement asynchronous, clockless data acquisition, providing information about the change in illuminance greater than 120dB with sub-millisecond temporal precision. These sensors have huge potential for space applications as they provide an extremely sparse representation of visual dynamics while removing redundant information, thereby conforming to low-resource requirements. An event-based sensor was irradiated under wide-spectrum neutrons at Los Alamos Neutron Science Center and its effects were classified. We found that the sensor had very fast recovery during radiation, showing high correlation of noise event bursts with respect to source macro-pulses. No significant differences were observed between the number of events induced at different angles of incidence but significant differences were found in the spatial structure of noise events at different angles. The results show that event-based cameras are capable of functioning in a space-like, radiative environment with a signal-to-noise ratio of 3.355. They also show that radiation-induced noise does not affect event-level computation. We also introduce the Event-based Radiation-Induced Noise Simulation Environment (Event-RINSE), a simulation environment based on the noise-modelling we conducted and capable of injecting the effects of radiation-induced noise from the collected data to any stream of events in order to ensure that developed code can operate in a radiative environment. To the best of our knowledge, this is the first time such analysis of neutron-induced noise analysis has been performed on a neuromorphic vision sensor, and this study shows the advantage of using such sensors for space applications.
['Ryad Benosman', 'Bernabé Linares-Barranco', 'Alan D. George', 'Himanshu Akolkar', 'Seth Roffe']
2021-01-29
null
null
null
null
['event-based-vision']
['computer-vision']
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[8.756023406982422, -1.2848315238952637]
acae04e4-2227-46ec-a3b4-ce239421970b
on-the-privacy-utility-trade-off-in
2103.02895
null
https://arxiv.org/abs/2103.02895v2
https://arxiv.org/pdf/2103.02895v2.pdf
On the privacy-utility trade-off in differentially private hierarchical text classification
Hierarchical text classification consists in classifying text documents into a hierarchy of classes and sub-classes. Although artificial neural networks have proved useful to perform this task, unfortunately they can leak training data information to adversaries due to training data memorization. Using differential privacy during model training can mitigate leakage attacks against trained models, enabling the models to be shared safely at the cost of reduced model accuracy. This work investigates the privacy-utility trade-off in hierarchical text classification with differential privacy guarantees, and identifies neural network architectures that offer superior trade-offs. To this end, we use a white-box membership inference attack to empirically assess the information leakage of three widely used neural network architectures. We show that large differential privacy parameters already suffice to completely mitigate membership inference attacks, thus resulting only in a moderate decrease in model utility. More specifically, for large datasets with long texts we observed Transformer-based models to achieve an overall favorable privacy-utility trade-off, while for smaller datasets with shorter texts convolutional neural networks are preferable.
['Thorsten Strufe', 'Javier Parra-Arnau', 'Francesco Aldà', 'Daniel Bernau', 'Dominik Wunderlich']
2021-03-04
null
null
null
null
['membership-inference-attack']
['computer-vision']
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[5.94254732131958, 6.951089859008789]
f69aca99-9984-4e64-85e0-2c7cc875fe82
dfnet-enhance-aboslute-pose-regression-with
2204.00559
null
https://arxiv.org/abs/2204.00559v4
https://arxiv.org/pdf/2204.00559v4.pdf
DFNet: Enhance Absolute Pose Regression with Direct Feature Matching
We introduce a camera relocalization pipeline that combines absolute pose regression (APR) and direct feature matching. By incorporating exposure-adaptive novel view synthesis, our method successfully addresses photometric distortions in outdoor environments that existing photometric-based methods fail to handle. With domain-invariant feature matching, our solution improves pose regression accuracy using semi-supervised learning on unlabeled data. In particular, the pipeline consists of two components: Novel View Synthesizer and DFNet. The former synthesizes novel views compensating for changes in exposure and the latter regresses camera poses and extracts robust features that close the domain gap between real images and synthetic ones. Furthermore, we introduce an online synthetic data generation scheme. We show that these approaches effectively enhance camera pose estimation both in indoor and outdoor scenes. Hence, our method achieves a state-of-the-art accuracy by outperforming existing single-image APR methods by as much as 56%, comparable to 3D structure-based methods.
['Victor Adrian Prisacariu', 'ZiRui Wang', 'Xinghui Li', 'Shuai Chen']
2022-04-01
null
null
null
null
['camera-relocalization']
['computer-vision']
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[8.282886505126953, -2.4643445014953613]
71f94576-29f7-4f3a-b3c1-4ee0c6b6742a
biometric-face-presentation-attack-detection-1
1909.08848
null
https://arxiv.org/abs/1909.08848v1
https://arxiv.org/pdf/1909.08848v1.pdf
Biometric Face Presentation Attack Detection with Multi-Channel Convolutional Neural Network
Face recognition is a mainstream biometric authentication method. However, vulnerability to presentation attacks (a.k.a spoofing) limits its usability in unsupervised applications. Even though there are many methods available for tackling presentation attacks (PA), most of them fail to detect sophisticated attacks such as silicone masks. As the quality of presentation attack instruments improves over time, achieving reliable PA detection with visual spectra alone remains very challenging. We argue that analysis in multiple channels might help to address this issue. In this context, we propose a multi-channel Convolutional Neural Network based approach for presentation attack detection (PAD). We also introduce the new Wide Multi-Channel presentation Attack (WMCA) database for face PAD which contains a wide variety of 2D and 3D presentation attacks for both impersonation and obfuscation attacks. Data from different channels such as color, depth, near-infrared and thermal are available to advance the research in face PAD. The proposed method was compared with feature-based approaches and found to outperform the baselines achieving an ACER of 0.3% on the introduced dataset. The database and the software to reproduce the results are made available publicly.
['Andre Anjos', 'Olegs Nikisins', 'Anjith George', 'Zohreh Mostaani', 'David Geissenbuhler', 'Sebastien Marcel']
2019-09-19
biometric-face-presentation-attack-detection
http://publications.idiap.ch/downloads/papers/2019/George_TIFS_2019.pdf
http://publications.idiap.ch/downloads/papers/2019/George_TIFS_2019.pdf
ieee-transactions-on-information-forensics-1
['face-presentation-attack-detection']
['computer-vision']
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[13.074593544006348, 1.0952194929122925]
8d9c1ddb-324f-41fa-b456-e81ce629a659
alterfactual-explanations-the-relevance-of
2207.09374
null
https://arxiv.org/abs/2207.09374v1
https://arxiv.org/pdf/2207.09374v1.pdf
Alterfactual Explanations -- The Relevance of Irrelevance for Explaining AI Systems
Explanation mechanisms from the field of Counterfactual Thinking are a widely-used paradigm for Explainable Artificial Intelligence (XAI), as they follow a natural way of reasoning that humans are familiar with. However, all common approaches from this field are based on communicating information about features or characteristics that are especially important for an AI's decision. We argue that in order to fully understand a decision, not only knowledge about relevant features is needed, but that the awareness of irrelevant information also highly contributes to the creation of a user's mental model of an AI system. Therefore, we introduce a new way of explaining AI systems. Our approach, which we call Alterfactual Explanations, is based on showing an alternative reality where irrelevant features of an AI's input are altered. By doing so, the user directly sees which characteristics of the input data can change arbitrarily without influencing the AI's decision. We evaluate our approach in an extensive user study, revealing that it is able to significantly contribute to the participants' understanding of an AI. We show that alterfactual explanations are suited to convey an understanding of different aspects of the AI's reasoning than established counterfactual explanation methods.
['Elisabeth André', 'Ruben Schlagowski', 'Katharina Weitz', 'Tobias Huber', 'Christina Karle', 'Silvan Mertes']
2022-07-19
null
null
null
null
['counterfactual-explanation']
['miscellaneous']
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[8.885815620422363, 6.092493534088135]
c4a21854-0b92-4a67-8c88-922e94a50a24
evaluation-of-noise-reduction-methods-for
2303.17829
null
https://arxiv.org/abs/2303.17829v3
https://arxiv.org/pdf/2303.17829v3.pdf
Evaluation of Noise Reduction Methods for Sentence Recognition by Sinhala Speaking Listeners
Noise reduction is a crucial aspect of hearing aids, which researchers have been striving to address over the years. However, most existing noise reduction algorithms have primarily been evaluated using English. Considering the linguistic differences between English and Sinhala languages, including variation in syllable structures and vowel duration, it is very important to assess the performance of noise reduction tailored to the Sinhala language. This paper presents a comprehensive analysis between wavelet transformation and adaptive filters for noise reduction in Sinhala languages. We investigate the performance of ten wavelet families with soft and hard thresholding methods against adaptive filters with Normalized Least Mean Square, Least Mean Square Average Normalized Least Mean Square, Recursive Least Square, and Adaptive Filtering Averaging optimization algorithms along with cepstral and energy-based voice activity detection algorithms. The performance evaluation is done using objective metrics; Signal to Noise Ratio (SNR) and Perceptual Evaluation of Speech Quality (PESQ) and a subjective metric; Mean Opinion Score (MOS). A newly recorded Sinhala language audio dataset and the NOIZEUS database by the University of Texas, Dallas were used for the evaluation. Our code is available at https://github.com/ChathukiKet/Evaluation-of-Noise-Reduction-Methods
['Anjula De Silva', 'Nipuna Upeksha', 'Dinithi Fernando', 'Chathuki Navanjana', 'Malitha Gunawardhana']
2023-03-31
null
null
null
null
['activity-detection']
['computer-vision']
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[15.057908058166504, 5.74766731262207]
a8522f73-213c-4fc7-b49b-454c38d4a078
generalisation-and-sharing-in-triplet
1611.05301
null
http://arxiv.org/abs/1611.05301v1
http://arxiv.org/pdf/1611.05301v1.pdf
Generalisation and Sharing in Triplet Convnets for Sketch based Visual Search
We propose and evaluate several triplet CNN architectures for measuring the similarity between sketches and photographs, within the context of the sketch based image retrieval (SBIR) task. In contrast to recent fine-grained SBIR work, we study the ability of our networks to generalise across diverse object categories from limited training data, and explore in detail strategies for weight sharing, pre-processing, data augmentation and dimensionality reduction. We exceed the performance of pre-existing techniques on both the Flickr15k category level SBIR benchmark by $18\%$, and the TU-Berlin SBIR benchmark by $\sim10 \mathcal{T}_b$, when trained on the 250 category TU-Berlin classification dataset augmented with 25k corresponding photographs harvested from the Internet.
['Leonardo Ribeiro', 'John Collomosse', 'Moacir Ponti', 'Tu Bui']
2016-11-16
null
null
null
null
['sketch-based-image-retrieval']
['computer-vision']
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[11.62424087524414, 0.5299427509307861]
612a8cad-c197-4698-9802-29fd9e6aa6e5
synthesize-extremely-high-dimensional
2304.02169
null
https://arxiv.org/abs/2304.02169v1
https://arxiv.org/pdf/2304.02169v1.pdf
Synthesize Extremely High-dimensional Longitudinal Electronic Health Records via Hierarchical Autoregressive Language Model
Synthetic electronic health records (EHRs) that are both realistic and preserve privacy can serve as an alternative to real EHRs for machine learning (ML) modeling and statistical analysis. However, generating high-fidelity and granular electronic health record (EHR) data in its original, highly-dimensional form poses challenges for existing methods due to the complexities inherent in high-dimensional data. In this paper, we propose Hierarchical Autoregressive Language mOdel (HALO) for generating longitudinal high-dimensional EHR, which preserve the statistical properties of real EHR and can be used to train accurate ML models without privacy concerns. Our HALO method, designed as a hierarchical autoregressive model, generates a probability density function of medical codes, clinical visits, and patient records, allowing for the generation of realistic EHR data in its original, unaggregated form without the need for variable selection or aggregation. Additionally, our model also produces high-quality continuous variables in a longitudinal and probabilistic manner. We conducted extensive experiments and demonstrate that HALO can generate high-fidelity EHR data with high-dimensional disease code probabilities (d > 10,000), disease co-occurrence probabilities within visits (d > 1,000,000), and conditional probabilities across consecutive visits (d > 5,000,000) and achieve above 0.9 R2 correlation in comparison to real EHR data. This performance then enables downstream ML models trained on its synthetic data to achieve comparable accuracy to models trained on real data (0.938 AUROC with HALO data vs. 0.943 with real data). Finally, using a combination of real and synthetic data enhances the accuracy of ML models beyond that achieved by using only real EHR data.
['Jimeng Sun', 'Cao Xiao', 'Brandon Theodorou']
2023-04-04
null
null
null
null
['variable-selection']
['methodology']
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[6.415262699127197, 6.680747985839844]
01f6abe7-d6d1-4bd0-8851-1cbfbe48454a
the-runner-up-solution-for-youtube-vis-long
2211.09973
null
https://arxiv.org/abs/2211.09973v1
https://arxiv.org/pdf/2211.09973v1.pdf
The Runner-up Solution for YouTube-VIS Long Video Challenge 2022
This technical report describes our 2nd-place solution for the ECCV 2022 YouTube-VIS Long Video Challenge. We adopt the previously proposed online video instance segmentation method IDOL for this challenge. In addition, we use pseudo labels to further help contrastive learning, so as to obtain more temporally consistent instance embedding to improve tracking performance between frames. The proposed method obtains 40.2 AP on the YouTube-VIS 2022 long video dataset and was ranked second place in this challenge. We hope our simple and effective method could benefit further research.
['Song Bai', 'Xiang Bai', 'Qihao Liu', 'Yi Jiang', 'Junfeng Wu']
2022-11-18
null
null
null
null
['video-instance-segmentation']
['computer-vision']
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[9.171192169189453, 0.016688993200659752]
9f172c26-aec2-4972-9b41-bfa653e753c5
improved-low-resource-somali-speech
1907.03064
null
https://arxiv.org/abs/1907.03064v1
https://arxiv.org/pdf/1907.03064v1.pdf
Improved low-resource Somali speech recognition by semi-supervised acoustic and language model training
We present improvements in automatic speech recognition (ASR) for Somali, a currently extremely under-resourced language. This forms part of a continuing United Nations (UN) effort to employ ASR-based keyword spotting systems to support humanitarian relief programmes in rural Africa. Using just 1.57 hours of annotated speech data as a seed corpus, we increase the pool of training data by applying semi-supervised training to 17.55 hours of untranscribed speech. We make use of factorised time-delay neural networks (TDNN-F) for acoustic modelling, since these have recently been shown to be effective in resource-scarce situations. Three semi-supervised training passes were performed, where the decoded output from each pass was used for acoustic model training in the subsequent pass. The automatic transcriptions from the best performing pass were used for language model augmentation. To ensure the quality of automatic transcriptions, decoder confidence is used as a threshold. The acoustic and language models obtained from the semi-supervised approach show significant improvement in terms of WER and perplexity compared to the baseline. Incorporating the automatically generated transcriptions yields a 6.55\% improvement in language model perplexity. The use of 17.55 hour of Somali acoustic data in semi-supervised training shows an improvement of 7.74\% relative over the baseline.
['Thomas Niesler', 'Raghav Menon', 'Astik Biswas', 'Ewald van der Westhuizen']
2019-07-06
null
null
null
null
['acoustic-modelling']
['speech']
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[14.375754356384277, 6.857481479644775]
1e163303-6466-496c-82f1-e483ac8a1dd5
diverse-instance-discovery-vision-transformer
2204.10731
null
https://arxiv.org/abs/2204.10731v1
https://arxiv.org/pdf/2204.10731v1.pdf
Diverse Instance Discovery: Vision-Transformer for Instance-Aware Multi-Label Image Recognition
Previous works on multi-label image recognition (MLIR) usually use CNNs as a starting point for research. In this paper, we take pure Vision Transformer (ViT) as the research base and make full use of the advantages of Transformer with long-range dependency modeling to circumvent the disadvantages of CNNs limited to local receptive field. However, for multi-label images containing multiple objects from different categories, scales, and spatial relations, it is not optimal to use global information alone. Our goal is to leverage ViT's patch tokens and self-attention mechanism to mine rich instances in multi-label images, named diverse instance discovery (DiD). To this end, we propose a semantic category-aware module and a spatial relationship-aware module, respectively, and then combine the two by a re-constraint strategy to obtain instance-aware attention maps. Finally, we propose a weakly supervised object localization-based approach to extract multi-scale local features, to form a multi-view pipeline. Our method requires only weakly supervised information at the label level, no additional knowledge injection or other strongly supervised information is required. Experiments on three benchmark datasets show that our method significantly outperforms previous works and achieves state-of-the-art results under fair experimental comparisons.
['Hui Xue', 'Yuan He', 'Feihu Yan', 'Jingfeng Zhang', 'Haiwen Hong', 'Yin Zhang', 'Xuan Jin', 'Yunqing Hu']
2022-04-22
null
null
null
null
['weakly-supervised-object-localization']
['computer-vision']
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[9.793025970458984, 3.877256393432617]
2670277f-ac16-4677-bbaf-6c212a379224
language-guided-image-clustering
null
null
https://openreview.net/forum?id=-JW-1Fg-v2
https://openreview.net/pdf?id=-JW-1Fg-v2
Language-Guided Image Clustering
Image clustering methods have rapidly improved their ability to discover object categories. However, unsupervised clustering methods struggle on other image attributes, e.g. age or activity. The reason is that most recent clustering methods learn deep features that are designed to be sensitive to object category, but less so to other image attributes. We propose to overcome this limitation by introducing the new setting of language-guided image clustering. In this setting, the model is provided with an exhaustive list of phrases describing all the possible values of a specific attribute, together with a shared image-language embedding (e.g. CLIP). Our method then computes the subset of K attribute phrases that form the best clustering of the images. Differently from standard clustering methods, our method can cluster according to image attributes other than the object category. We evaluate our method on a attribute clustering tasks and demonstrate that our method significantly outperforms methods that do not use language-guidance.
['Yedid Hoshen', 'Niv Cohen']
2021-09-29
null
null
null
null
['image-clustering']
['computer-vision']
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[9.288463592529297, 3.008788585662842]
c4e88a07-ddec-4753-9232-f0ccbdec0ea7
self-supervised-learning-of-a-tailored
2303.11837
null
https://arxiv.org/abs/2303.11837v1
https://arxiv.org/pdf/2303.11837v1.pdf
Self-supervised learning of a tailored Convolutional Auto Encoder for histopathological prostate grading
According to GLOBOCAN 2020, prostate cancer is the second most common cancer in men worldwide and the fourth most prevalent cancer overall. For pathologists, grading prostate cancer is challenging, especially when discriminating between Grade 3 (G3) and Grade 4 (G4). This paper proposes a Self-Supervised Learning (SSL) framework to classify prostate histopathological images when labeled images are scarce. In particular, a tailored Convolutional Auto Encoder (CAE) is trained to reconstruct 128x128x3 patches of prostate cancer Whole Slide Images (WSIs) as a pretext task. The downstream task of the proposed SSL paradigm is the automatic grading of histopathological patches of prostate cancer. The presented framework reports promising results on the validation set, obtaining an overall accuracy of 83% and on the test set, achieving an overall accuracy value of 76% with F1-score of 77% in G4.
['Valery Naranjo', 'Javier Oliver', 'Kjersti Engan', 'Adrian colomer', 'Zahra Tabatabaei']
2023-03-21
null
null
null
null
['whole-slide-images']
['computer-vision']
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[15.052544593811035, -2.895550012588501]
45392ec9-eb73-43cc-839a-444aaf5ddf1a
advest-adversarial-perturbation-estimation-to
2204.03848
null
https://arxiv.org/abs/2204.03848v1
https://arxiv.org/pdf/2204.03848v1.pdf
AdvEst: Adversarial Perturbation Estimation to Classify and Detect Adversarial Attacks against Speaker Identification
Adversarial attacks pose a severe security threat to the state-of-the-art speaker identification systems, thereby making it vital to propose countermeasures against them. Building on our previous work that used representation learning to classify and detect adversarial attacks, we propose an improvement to it using AdvEst, a method to estimate adversarial perturbation. First, we prove our claim that training the representation learning network using adversarial perturbations as opposed to adversarial examples (consisting of the combination of clean signal and adversarial perturbation) is beneficial because it eliminates nuisance information. At inference time, we use a time-domain denoiser to estimate the adversarial perturbations from adversarial examples. Using our improved representation learning approach to obtain attack embeddings (signatures), we evaluate their performance for three applications: known attack classification, attack verification, and unknown attack detection. We show that common attacks in the literature (Fast Gradient Sign Method (FGSM), Projected Gradient Descent (PGD), Carlini-Wagner (CW) with different Lp threat models) can be classified with an accuracy of ~96%. We also detect unknown attacks with an equal error rate (EER) of ~9%, which is absolute improvement of ~12% from our previous work.
['Najim Dehak', 'Jesus Villalba', 'Saurabh Kataria', 'Sonal Joshi']
2022-04-08
null
null
null
null
['speaker-identification']
['speech']
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[13.976191520690918, 5.820969581604004]
e50ff3a9-e3c2-45c1-afee-f126256bb488
pretraining-boosts-out-of-domain-robustness
1909.11229
null
https://arxiv.org/abs/1909.11229v2
https://arxiv.org/pdf/1909.11229v2.pdf
Pretraining boosts out-of-domain robustness for pose estimation
Neural networks are highly effective tools for pose estimation. However, as in other computer vision tasks, robustness to out-of-domain data remains a challenge, especially for small training sets that are common for real-world applications. Here, we probe the generalization ability with three architecture classes (MobileNetV2s, ResNets, and EfficientNets) for pose estimation. We developed a dataset of 30 horses that allowed for both "within-domain" and "out-of-domain" (unseen horse) benchmarking - this is a crucial test for robustness that current human pose estimation benchmarks do not directly address. We show that better ImageNet-performing architectures perform better on both within- and out-of-domain data if they are first pretrained on ImageNet. We additionally show that better ImageNet models generalize better across animal species. Furthermore, we introduce Horse-C, a new benchmark for common corruptions for pose estimation, and confirm that pretraining increases performance in this domain shift context as well. Overall, our results demonstrate that transfer learning is beneficial for out-of-domain robustness.
['Steffen Schneider', 'Thomas Biasi', 'Mert Yüksekgönül', 'Alexander Mathis', 'Matthias Bethge', 'Mackenzie W. Mathis', 'Byron Rogers']
2019-09-24
pretraining-boosts-out-of-domain-robustness-1
https://openaccess.thecvf.com/content/WACV2021/papers/Mathis_Pretraining_Boosts_Out-of-Domain_Robustness_for_Pose_Estimation_WACV_2021_paper.pdf
https://openaccess.thecvf.com/content/WACV2021/papers/Mathis_Pretraining_Boosts_Out-of-Domain_Robustness_for_Pose_Estimation_WACV_2021_paper.pdf
null
['animal-pose-estimation']
['computer-vision']
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[7.466031074523926, -0.9637004137039185]
807f2394-3bfb-45fa-abb6-3018653f313f
alpha-matte-generation-from-single-input-for
2106.03210
null
https://arxiv.org/abs/2106.03210v3
https://arxiv.org/pdf/2106.03210v3.pdf
Alpha Matte Generation from Single Input for Portrait Matting
In the portrait matting, the goal is to predict an alpha matte that identifies the effect of each pixel on the foreground subject. Traditional approaches and most of the existing works utilized an additional input, e.g., trimap, background image, to predict alpha matte. However, (1) providing additional input is not always practical, and (2) models are too sensitive to these additional inputs. To address these points, in this paper, we introduce an additional input-free approach to perform portrait matting. We divide the task into two subtasks, segmentation and alpha matte prediction. We first generate a coarse segmentation map from the input image and then predict the alpha matte by utilizing the image and segmentation map. Besides, we present a segmentation encoding block to downsample the coarse segmentation map and provide useful feature representation to the residual block, since using a single encoder causes the vanishing of the segmentation information. We tested our model on four different benchmark datasets. The proposed method outperformed the MODNet and MGMatting methods that also take a single input. Besides, we obtained comparable results with BGM-V2 and FBA methods that require additional input.
['Alexander Waibel', 'Hazim Kemal Ekenel', 'Dogucan Yaman']
2021-06-06
null
null
null
null
['image-matting']
['computer-vision']
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[10.659375190734863, -0.9397047162055969]
502b34aa-570f-4f1a-a7b4-4d957661c76e
temporal-relational-crosstransformers-for-few
2101.06184
null
https://arxiv.org/abs/2101.06184v3
https://arxiv.org/pdf/2101.06184v3.pdf
Temporal-Relational CrossTransformers for Few-Shot Action Recognition
We propose a novel approach to few-shot action recognition, finding temporally-corresponding frame tuples between the query and videos in the support set. Distinct from previous few-shot works, we construct class prototypes using the CrossTransformer attention mechanism to observe relevant sub-sequences of all support videos, rather than using class averages or single best matches. Video representations are formed from ordered tuples of varying numbers of frames, which allows sub-sequences of actions at different speeds and temporal offsets to be compared. Our proposed Temporal-Relational CrossTransformers (TRX) achieve state-of-the-art results on few-shot splits of Kinetics, Something-Something V2 (SSv2), HMDB51 and UCF101. Importantly, our method outperforms prior work on SSv2 by a wide margin (12%) due to the its ability to model temporal relations. A detailed ablation showcases the importance of matching to multiple support set videos and learning higher-order relational CrossTransformers.
['Dima Damen', 'Majid Mirmehdi', 'Tilo Burghardt', 'Alessandro Masullo', 'Toby Perrett']
2021-01-15
null
http://openaccess.thecvf.com//content/CVPR2021/html/Perrett_Temporal-Relational_CrossTransformers_for_Few-Shot_Action_Recognition_CVPR_2021_paper.html
http://openaccess.thecvf.com//content/CVPR2021/papers/Perrett_Temporal-Relational_CrossTransformers_for_Few-Shot_Action_Recognition_CVPR_2021_paper.pdf
cvpr-2021-1
['few-shot-action-recognition']
['computer-vision']
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[8.630788803100586, 0.7941852807998657]
9d84e679-412a-443f-96c0-56a88e979ed0
joint-spatio-temporal-modeling-for-semantic
2212.05245
null
https://arxiv.org/abs/2212.05245v4
https://arxiv.org/pdf/2212.05245v4.pdf
Joint Spatio-Temporal Modeling for the Semantic Change Detection in Remote Sensing Images
Semantic Change Detection (SCD) refers to the task of simultaneously extracting the changed areas and the semantic categories (before and after the changes) in Remote Sensing Images (RSIs). This is more meaningful than Binary Change Detection (BCD) since it enables detailed change analysis in the observed areas. Previous works established triple-branch Convolutional Neural Network (CNN) architectures as the paradigm for SCD. However, it remains challenging to exploit semantic information with a limited amount of change samples. In this work, we investigate to jointly consider the spatio-temporal dependencies to improve the accuracy of SCD. First, we propose a Semantic Change Transformer (SCanFormer) to explicitly model the 'from-to' semantic transitions between the bi-temporal RSIs. Then, we introduce a semantic learning scheme to leverage the spatio-temporal constraints, which are coherent to the SCD task, to guide the learning of semantic changes. The resulting network (SCanNet) significantly outperforms the baseline method in terms of both detection of critical semantic changes and semantic consistency in the obtained bi-temporal results. It achieves the SOTA accuracy on two benchmark datasets for the SCD.
['Lorenzo Bruzzone', 'Bing Liu', 'Haitao Guo', 'Kai Zhang', 'Jing Zhang', 'Lei Ding']
2022-12-10
null
null
null
null
['change-detection']
['computer-vision']
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[9.683335304260254, -1.3023813962936401]
f125ffb0-d6b4-423d-9ada-88568c543ebd
automated-essay-scoring-using-transformers
2210.12809
null
https://arxiv.org/abs/2210.12809v5
https://arxiv.org/pdf/2210.12809v5.pdf
Data Augmentation for Automated Essay Scoring using Transformer Models
Automated essay scoring is one of the most important problem in Natural Language Processing. It has been explored for a number of years, and it remains partially solved. In addition to its economic and educational usefulness, it presents research problems. Transfer learning has proved to be beneficial in NLP. Data augmentation techniques have also helped build state-of-the-art models for automated essay scoring. Many works in the past have attempted to solve this problem by using RNNs, LSTMs, etc. This work examines the transformer models like BERT, RoBERTa, etc. We empirically demonstrate the effectiveness of transformer models and data augmentation for automated essay grading across many topics using a single model.
['Kshitij Gupta']
2022-10-23
null
null
null
null
['automated-essay-scoring']
['natural-language-processing']
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[11.293671607971191, 9.318516731262207]
cfb8697e-ee80-4363-a951-3d22c1adecf2
mutual-learning-for-domain-adaptation-self
2203.09430
null
https://arxiv.org/abs/2203.09430v1
https://arxiv.org/pdf/2203.09430v1.pdf
Mutual Learning for Domain Adaptation: Self-distillation Image Dehazing Network with Sample-cycle
Deep learning-based methods have made significant achievements for image dehazing. However, most of existing dehazing networks are concentrated on training models using simulated hazy images, resulting in generalization performance degradation when applied on real-world hazy images because of domain shift. In this paper, we propose a mutual learning dehazing framework for domain adaption. Specifically, we first devise two siamese networks: a teacher network in the synthetic domain and a student network in the real domain, and then optimize them in a mutual learning manner by leveraging EMA and joint loss. Moreover, we design a sample-cycle strategy based on density augmentation (HDA) module to introduce pseudo real-world image pairs provided by the student network into training for further improving the generalization performance. Extensive experiments on both synthetic and real-world dataset demonstrate that the propose mutual learning framework outperforms state-of-the-art dehazing techniques in terms of subjective and objective evaluation.
['ErKang Chen', 'Sixiang Chen', 'Yunchen Zhang', 'Yun Liu', 'Tian Ye']
2022-03-17
null
null
null
null
['image-dehazing']
['computer-vision']
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[10.934354782104492, -3.080382823944092]
809922a6-bf61-429a-8477-61f742f8cd70
connective-cognition-network-for-directional
null
null
http://papers.nips.cc/paper/8804-connective-cognition-network-for-directional-visual-commonsense-reasoning
http://papers.nips.cc/paper/8804-connective-cognition-network-for-directional-visual-commonsense-reasoning.pdf
Connective Cognition Network for Directional Visual Commonsense Reasoning
Visual commonsense reasoning (VCR) has been introduced to boost research of cognition-level visual understanding, i.e., a thorough understanding of correlated details of the scene plus an inference with related commonsense knowledge. Recent studies on neuroscience have suggested that brain function or cognition can be described as a global and dynamic integration of local neuronal connectivity, which is context-sensitive to specific cognition tasks. Inspired by this idea, towards VCR, we propose a connective cognition network (CCN) to dynamically reorganize the visual neuron connectivity that is contextualized by the meaning of questions and answers. Concretely, we first develop visual neuron connectivity to fully model correlations of visual content. Then, a contextualization process is introduced to fuse the sentence representation with that of visual neurons. Finally, based on the output of contextualized connectivity, we propose directional connectivity to infer answers or rationales. Experimental results on the VCR dataset demonstrate the effectiveness of our method. Particularly, in $Q \to AR$ mode, our method is around 4\% higher than the state-of-the-art method.
['Yahong Han', 'Linchao Zhu', 'Aming Wu', 'Yi Yang']
2019-12-01
null
null
null
neurips-2019-12
['visual-commonsense-reasoning']
['reasoning']
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[10.761784553527832, 1.799759864807129]
52d35329-26f0-4d51-ab73-7bbc8bb8cd17
classification-of-12-lead-ecg-signals-with-bi
1811.02090
null
http://arxiv.org/abs/1811.02090v1
http://arxiv.org/pdf/1811.02090v1.pdf
Classification of 12-Lead ECG Signals with Bi-directional LSTM Network
We propose a recurrent neural network classifier to detect pathologies in 12-lead ECG signals and train and validate the classifier with the Chinese physiological signal challenge dataset (http://www.icbeb.org/Challenge.html). The recurrent neural network consists of two bi-directional LSTM layers and can train on arbitrary-length ECG signals. Our best trained model achieved an average F1 score of 74.15% on the validation set. Keywords: ECG classification, Deep learning, RNN, Bi-directional LSTM, QRS detection.
['William Wee', 'Junye Luo', 'Ahmed Mostayed', 'Xingliang Shu']
2018-11-05
null
null
null
null
['ecg-classification']
['medical']
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[14.341415405273438, 3.3117568492889404]
841eae4f-75e8-40fd-82f7-35e821a86fac
deep-learning-for-automated-medical-image
1903.04711
null
http://arxiv.org/abs/1903.04711v1
http://arxiv.org/pdf/1903.04711v1.pdf
Deep Learning for Automated Medical Image Analysis
Medical imaging is an essential tool in many areas of medical applications, used for both diagnosis and treatment. However, reading medical images and making diagnosis or treatment recommendations require specially trained medical specialists. The current practice of reading medical images is labor-intensive, time-consuming, costly, and error-prone. It would be more desirable to have a computer-aided system that can automatically make diagnosis and treatment recommendations. Recent advances in deep learning enable us to rethink the ways of clinician diagnosis based on medical images. In this thesis, we will introduce 1) mammograms for detecting breast cancers, the most frequently diagnosed solid cancer for U.S. women, 2) lung CT images for detecting lung cancers, the most frequently diagnosed malignant cancer, and 3) head and neck CT images for automated delineation of organs at risk in radiotherapy. First, we will show how to employ the adversarial concept to generate the hard examples improving mammogram mass segmentation. Second, we will demonstrate how to use the weakly labeled data for the mammogram breast cancer diagnosis by efficiently design deep learning for multi-instance learning. Third, the thesis will walk through DeepLung system which combines deep 3D ConvNets and GBM for automated lung nodule detection and classification. Fourth, we will show how to use weakly labeled data to improve existing lung nodule detection system by integrating deep learning with a probabilistic graphic model. Lastly, we will demonstrate the AnatomyNet which is thousands of times faster and more accurate than previous methods on automated anatomy segmentation.
['Wentao Zhu']
2019-03-12
null
null
null
null
['lung-nodule-detection']
['medical']
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[15.234183311462402, -2.1379740238189697]
e890a60f-84c8-4b5b-8b37-d52aedad828e
around-the-world-in-60-words-a-generative
2302.01614
null
https://arxiv.org/abs/2302.01614v1
https://arxiv.org/pdf/2302.01614v1.pdf
Around the world in 60 words: A generative vocabulary test for online research
Conducting experiments with diverse participants in their native languages can uncover insights into culture, cognition, and language that may not be revealed otherwise. However, conducting these experiments online makes it difficult to validate self-reported language proficiency. Furthermore, existing proficiency tests are small and cover only a few languages. We present an automated pipeline to generate vocabulary tests using text from Wikipedia. Our pipeline samples rare nouns and creates pseudowords with the same low-level statistics. Six behavioral experiments (N=236) in six countries and eight languages show that (a) our test can distinguish between native speakers of closely related languages, (b) the test is reliable ($r=0.82$), and (c) performance strongly correlates with existing tests (LexTale) and self-reports. We further show that test accuracy is negatively correlated with the linguistic distance between the tested and the native language. Our test, available in eight languages, can easily be extended to other languages.
['Nori Jacoby', 'Elisabeth André', 'Francesca Lanzarini', 'Ilia Sucholutsky', 'Raja Marjieh', 'Harin Lee', 'Yue Sun', 'Pol van Rijn']
2023-02-03
null
null
null
null
['culture']
['speech']
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[10.823559761047363, 10.026910781860352]
c04360a0-2a51-452b-b0c9-049082b8d93a
distributed-optimization-for-reactive-power
2302.09241
null
https://arxiv.org/abs/2302.09241v2
https://arxiv.org/pdf/2302.09241v2.pdf
Distributed Optimization for Reactive Power Sharing and Stability of Inverter-Based Resources Under Voltage Limits
Reactive power sharing and containment of voltages within limits for inverter-based resources (IBRs) are two important, yet coupled objectives in ac networks. In this article, we propose a distributed control technique to simultaneously achieve these objectives. Our controller consists of two components: a purely local nonlinear integral controller which adjusts the IBR voltage setpoint, and a distributed primal-dual optimizer that coordinates reactive power sharing between the IBRs. The controller prioritizes the voltage containment objective over reactive power sharing at all points in time; excluding the IBRs with saturated voltages, it provides reactive power sharing among all the IBRs. Considering the voltage saturation and the coupling between voltage and angle dynamics, a formal closed-loop stability analysis based on singular perturbation theory is provided, yielding practical tuning guidance for the overall control system. To validate the effectiveness of the proposed controller for different case studies, we apply it to a low-voltage microgrid and a microgrid adapted from the CIGRE medium-voltage network benchmark, both simulated in the MATLAB/Simulink environment.
['Gilbert Bergna-Diaz', 'John W. Simpson-Porco', 'Babak Abdolmaleki']
2023-02-18
null
null
null
null
['distributed-optimization']
['methodology']
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[5.649630069732666, 2.580583095550537]
5ae2b46a-00c5-4be3-8ad3-4232c2dc4813
using-k-way-co-occurrences-for-learning-word
1709.01199
null
http://arxiv.org/abs/1709.01199v1
http://arxiv.org/pdf/1709.01199v1.pdf
Using $k$-way Co-occurrences for Learning Word Embeddings
Co-occurrences between two words provide useful insights into the semantics of those words. Consequently, numerous prior work on word embedding learning have used co-occurrences between two words as the training signal for learning word embeddings. However, in natural language texts it is common for multiple words to be related and co-occurring in the same context. We extend the notion of co-occurrences to cover $k(\geq\!\!2)$-way co-occurrences among a set of $k$-words. Specifically, we prove a theoretical relationship between the joint probability of $k(\geq\!\!2)$ words, and the sum of $\ell_2$ norms of their embeddings. Next, we propose a learning objective motivated by our theoretical result that utilises $k$-way co-occurrences for learning word embeddings. Our experimental results show that the derived theoretical relationship does indeed hold empirically, and despite data sparsity, for some smaller $k$ values, $k$-way embeddings perform comparably or better than $2$-way embeddings in a range of tasks.
['Ken-ichi Kawarabayashi', 'Yuichi Yoshida', 'Danushka Bollegala']
2017-09-05
null
null
null
null
['learning-word-embeddings']
['methodology']
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[10.441325187683105, 8.772536277770996]
98be4784-b7ef-4d6b-b2b4-d6e2d6d5e6a9
openp5-benchmarking-foundation-models-for
2306.11134
null
https://arxiv.org/abs/2306.11134v1
https://arxiv.org/pdf/2306.11134v1.pdf
OpenP5: Benchmarking Foundation Models for Recommendation
This paper presents OpenP5, an open-source library for benchmarking foundation models for recommendation under the Pre-train, Personalized Prompt and Predict Paradigm (P5). We consider the implementation of P5 on three dimensions: 1) downstream task, 2) recommendation dataset, and 3) item indexing method. For 1), we provide implementation over two downstream tasks: sequential recommendation and straightforward recommendation. For 2), we surveyed frequently used datasets in recommender system research in recent years and provide implementation on ten datasets. In particular, we provide both single-dataset implementation and the corresponding checkpoints (P5) and another Super P5 (SP5) implementation that is pre-trained on all of the datasets, which supports recommendation across various domains with one model. For 3), we provide implementation of three item indexing methods to create item IDs: random indexing, sequential indexing, and collaborative indexing. We also provide comprehensive evaluation results of the library over the two downstream tasks, the ten datasets, and the three item indexing methods to facilitate reproducibility and future research. We open-source the code and the pre-trained checkpoints of the OpenP5 library at https://github.com/agiresearch/OpenP5.
['Yongfeng Zhang', 'Wenyue Hua', 'Shuyuan Xu']
2023-06-19
null
null
null
null
['sequential-recommendation', 'benchmarking', 'benchmarking']
['miscellaneous', 'miscellaneous', 'robots']
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[10.172045707702637, 5.733040809631348]
27a95049-1376-474c-8a66-adef8298efaf
error-correction-for-dense-semantic-image
1712.03812
null
http://arxiv.org/abs/1712.03812v1
http://arxiv.org/pdf/1712.03812v1.pdf
Error Correction for Dense Semantic Image Labeling
Pixelwise semantic image labeling is an important, yet challenging, task with many applications. Typical approaches to tackle this problem involve either the training of deep networks on vast amounts of images to directly infer the labels or the use of probabilistic graphical models to jointly model the dependencies of the input (i.e. images) and output (i.e. labels). Yet, the former approaches do not capture the structure of the output labels, which is crucial for the performance of dense labeling, and the latter rely on carefully hand-designed priors that require costly parameter tuning via optimization techniques, which in turn leads to long inference times. To alleviate these restrictions, we explore how to arrive at dense semantic pixel labels given both the input image and an initial estimate of the output labels. We propose a parallel architecture that: 1) exploits the context information through a LabelPropagation network to propagate correct labels from nearby pixels to improve the object boundaries, 2) uses a LabelReplacement network to directly replace possibly erroneous, initial labels with new ones, and 3) combines the different intermediate results via a Fusion network to obtain the final per-pixel label. We experimentally validate our approach on two different datasets for the semantic segmentation and face parsing tasks respectively, where we show improvements over the state-of-the-art. We also provide both a quantitative and qualitative analysis of the generated results.
['Luc van Gool', 'Tinne Tuytelaars', 'Yu-Hui Huang', 'Xu Jia', 'Stamatios Georgoulis']
2017-12-11
null
null
null
null
['face-parsing']
['computer-vision']
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[9.548188209533691, 0.5539113879203796]
bf24e74f-351d-44f1-b375-104f5980c8c0
cutting-through-the-noise-an-empirical
2211.01704
null
https://arxiv.org/abs/2211.01704v2
https://arxiv.org/pdf/2211.01704v2.pdf
Cutting Through the Noise: An Empirical Comparison of Psychoacoustic and Envelope-based Features for Machinery Fault Detection
Acoustic-based fault detection has a high potential to monitor the health condition of mechanical parts. However, the background noise of an industrial environment may negatively influence the performance of fault detection. Limited attention has been paid to improving the robustness of fault detection against industrial environmental noise. Therefore, we present the Lenze production background-noise (LPBN) real-world dataset and an automated and noise-robust auditory inspection (ARAI) system for the end-of-line inspection of geared motors. An acoustic array is used to acquire data from motors with a minor fault, major fault, or which are healthy. A benchmark is provided to compare the psychoacoustic features with different types of envelope features based on expert knowledge of the gearbox. To the best of our knowledge, we are the first to apply time-varying psychoacoustic features for fault detection. We train a state-of-the-art one-class-classifier, on samples from healthy motors and separate the faulty ones for fault detection using a threshold. The best-performing approaches achieve an area under curve of 0.87 (logarithm envelope), 0.86 (time-varying psychoacoustics), and 0.91 (combination of both).
['Gregory Palmer', 'Zhao Ren', 'David Pelkmann', 'Yvonne Richter', 'Peter Wißbrock']
2022-11-03
null
null
null
null
['one-class-classifier', 'fault-detection']
['methodology', 'miscellaneous']
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[6.756795883178711, 2.3490638732910156]
06d157f4-f5d2-4c6c-8e1f-696aeb7c4a50
dialogps-dialogue-path-sampling-in-continuous
2306.16770
null
https://arxiv.org/abs/2306.16770v1
https://arxiv.org/pdf/2306.16770v1.pdf
DialoGPS: Dialogue Path Sampling in Continuous Semantic Space for Data Augmentation in Multi-Turn Conversations
In open-domain dialogue generation tasks, contexts and responses in most datasets are one-to-one mapped, violating an important many-to-many characteristic: a context leads to various responses, and a response answers multiple contexts. Without such patterns, models poorly generalize and prefer responding safely. Many attempts have been made in either multi-turn settings from a one-to-many perspective or in a many-to-many perspective but limited to single-turn settings. The major challenge to many-to-many augment multi-turn dialogues is that discretely replacing each turn with semantic similarity breaks fragile context coherence. In this paper, we propose DialoGue Path Sampling (DialoGPS) method in continuous semantic space, the first many-to-many augmentation method for multi-turn dialogues. Specifically, we map a dialogue to our extended Brownian Bridge, a special Gaussian process. We sample latent variables to form coherent dialogue paths in the continuous space. A dialogue path corresponds to a new multi-turn dialogue and is used as augmented training data. We show the effect of DialoGPS with both automatic and human evaluation.
['Rui Yan', 'Ji Zhang', 'Xing Gao', 'Yuhan Chen', 'Jinpeng Li', 'Ang Lv']
2023-06-29
null
null
null
null
['dialogue-generation', 'semantic-textual-similarity', 'semantic-similarity', 'dialogue-generation']
['natural-language-processing', 'natural-language-processing', 'natural-language-processing', 'speech']
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[12.800802230834961, 8.141160011291504]
33129f9e-707b-4ec9-9342-491f6ac0b4b1
logical-reasoning-over-natural-language-as
2303.12023
null
https://arxiv.org/abs/2303.12023v1
https://arxiv.org/pdf/2303.12023v1.pdf
Logical Reasoning over Natural Language as Knowledge Representation: A Survey
Logical reasoning is central to human cognition and intelligence. Past research of logical reasoning within AI uses formal language as knowledge representation~(and symbolic reasoners). However, reasoning with formal language has proved challenging~(e.g., brittleness and knowledge-acquisition bottleneck). This paper provides a comprehensive overview on a new paradigm of logical reasoning, which uses natural language as knowledge representation~(and pretrained language models as reasoners), including philosophical definition and categorization of logical reasoning, advantages of the new paradigm, benchmarks and methods, challenges of the new paradigm, desirable tasks & methods in the future, and relation to related NLP fields. This new paradigm is promising since it not only alleviates many challenges of formal representation but also has advantages over end-to-end neural methods.
['Erik Cambria', 'Jinjie Ni', 'Rui Mao', 'Xinya Du', 'Zonglin Yang']
2023-03-21
null
null
null
null
['logical-reasoning']
['reasoning']
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[9.232184410095215, 7.175995349884033]
88da34af-a446-47d2-9cc9-808a9107b897
multi-module-based-cvae-to-predict-hvcm
2304.10639
null
https://arxiv.org/abs/2304.10639v1
https://arxiv.org/pdf/2304.10639v1.pdf
Multi-module based CVAE to predict HVCM faults in the SNS accelerator
We present a multi-module framework based on Conditional Variational Autoencoder (CVAE) to detect anomalies in the power signals coming from multiple High Voltage Converter Modulators (HVCMs). We condition the model with the specific modulator type to capture different representations of the normal waveforms and to improve the sensitivity of the model to identify a specific type of fault when we have limited samples for a given module type. We studied several neural network (NN) architectures for our CVAE model and evaluated the model performance by looking at their loss landscape for stability and generalization. Our results for the Spallation Neutron Source (SNS) experimental data show that the trained model generalizes well to detecting multiple fault types for several HVCM module types. The results of this study can be used to improve the HVCM reliability and overall SNS uptime
['Sarah Cousineau', 'Pradeep Ramuhalli', 'Dan Lu', 'Majdi I. Radaideh', 'Chris Pappas', 'Lasitha Vidyaratne', 'Steven Goldenberg', 'Kishansingh Rajput', 'Malachi Schram', 'Yasir Alanazi']
2023-04-20
null
null
null
null
['type']
['speech']
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[6.72311544418335, 2.4261562824249268]
63d701d5-cda1-4208-984d-efa5e36d49d3
evaluating-coreference-resolvers-on-community
null
null
https://aclanthology.org/2022.crac-1.7
https://aclanthology.org/2022.crac-1.7.pdf
Evaluating Coreference Resolvers on Community-based Question Answering: From Rule-based to State of the Art
Coreference resolution is a key step in natural language understanding. Developments in coreference resolution are mainly focused on improving the performance on standard datasets annotated for coreference resolution. However, coreference resolution is an intermediate step for text understanding and it is not clear how these improvements translate into downstream task performance. In this paper, we perform a thorough investigation on the impact of coreference resolvers in multiple settings of community-based question answering task, i.e., answer selection with long answers. Our settings cover multiple text domains and encompass several answer selection methods. We first inspect extrinsic evaluation of coreference resolvers on answer selection by using coreference relations to decontextualize individual sentences of candidate answers, and then annotate a subset of answers with coreference information for intrinsic evaluation. The results of our extrinsic evaluation show that while there is a significant difference between the performance of the rule-based system vs. state-of-the-art neural model on coreference resolution datasets, we do not observe a considerable difference on their impact on downstream models. Our intrinsic evaluation shows that (i) resolving coreference relations on less-formal text genres is more difficult even for trained annotators, and (ii) the values of linguistic-agnostic coreference evaluation metrics do not correlate with the impact on downstream data.
['Michael Strube', 'Iryna Gurevych', 'Nafise Sadat Moosavi', 'Haixia Chai']
null
null
null
null
coling-crac-2022-10
['coreference-resolution', 'answer-selection']
['natural-language-processing', 'natural-language-processing']
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[9.338930130004883, 9.501349449157715]
8b6a613d-e8fb-4777-a89d-ce055a7e272e
nnqs-transformer-an-efficient-and-scalable
2306.16705
null
https://arxiv.org/abs/2306.16705v2
https://arxiv.org/pdf/2306.16705v2.pdf
NNQS-Transformer: an Efficient and Scalable Neural Network Quantum States Approach for Ab initio Quantum Chemistry
Neural network quantum state (NNQS) has emerged as a promising candidate for quantum many-body problems, but its practical applications are often hindered by the high cost of sampling and local energy calculation. We develop a high-performance NNQS method for \textit{ab initio} electronic structure calculations. The major innovations include: (1) A transformer based architecture as the quantum wave function ansatz; (2) A data-centric parallelization scheme for the variational Monte Carlo (VMC) algorithm which preserves data locality and well adapts for different computing architectures; (3) A parallel batch sampling strategy which reduces the sampling cost and achieves good load balance; (4) A parallel local energy evaluation scheme which is both memory and computationally efficient; (5) Study of real chemical systems demonstrates both the superior accuracy of our method compared to state-of-the-art and the strong and weak scalability for large molecular systems with up to $120$ spin orbitals.
['Honghui Shang', 'Pengyu Zhou', 'Yi Fan', 'Chu Guo', 'Yangjun Wu']
2023-06-29
null
null
null
null
['variational-monte-carlo']
['miscellaneous']
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[5.39016580581665, 5.124839782714844]
004fba26-5f98-4ac8-abd3-092cf3bc4b1a
automatic-generation-of-multiple-choice
2303.14576
null
https://arxiv.org/abs/2303.14576v1
https://arxiv.org/pdf/2303.14576v1.pdf
Automatic Generation of Multiple-Choice Questions
Creating multiple-choice questions to assess reading comprehension of a given article involves generating question-answer pairs (QAPs) and adequate distractors. We present two methods to tackle the challenge of QAP generations: (1) A deep-learning-based end-to-end question generation system based on T5 Transformer with Preprocessing and Postprocessing Pipelines (TP3). We use the finetuned T5 model for our downstream task of question generation and improve accuracy using a combination of various NLP tools and algorithms in preprocessing and postprocessing to select appropriate answers and filter undesirable questions. (2) A sequence-learning-based scheme to generate adequate QAPs via meta-sequence representations of sentences. A meta-sequence is a sequence of vectors comprising semantic and syntactic tags. we devise a scheme called MetaQA to learn meta sequences from training data to form pairs of a meta sequence for a declarative sentence and a corresponding interrogative sentence. The TP3 works well on unseen data, which is complemented by MetaQA. Both methods can generate well-formed and grammatically correct questions. Moreover, we present a novel approach to automatically generate adequate distractors for a given QAP. The method is a combination of part-of-speech tagging, named-entity tagging, semantic-role labeling, regular expressions, domain knowledge bases, word embeddings, word edit distance, WordNet, and other algorithms.
['Cheng Zhang']
2023-03-25
null
null
null
null
['semantic-role-labeling', 'part-of-speech-tagging', 'reading-comprehension', 'question-generation']
['natural-language-processing', 'natural-language-processing', 'natural-language-processing', 'natural-language-processing']
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[11.493325233459473, 8.209541320800781]
f0fe872f-43c5-4c4b-abd0-f539055753cd
a-generic-approach-to-integrating-time-into
2305.06827
null
https://arxiv.org/abs/2305.06827v2
https://arxiv.org/pdf/2305.06827v2.pdf
A Generic Approach to Integrating Time into Spatial-Temporal Forecasting via Conditional Neural Fields
Self-awareness is the key capability of autonomous systems, e.g., autonomous driving network, which relies on highly efficient time series forecasting algorithm to enable the system to reason about the future state of the environment, as well as its effect on the system behavior as time progresses. Recently, a large number of forecasting algorithms using either convolutional neural networks or graph neural networks have been developed to exploit the complex temporal and spatial dependencies present in the time series. While these solutions have shown significant advantages over statistical approaches, one open question is to effectively incorporate the global information which represents the seasonality patterns via the time component of time series into the forecasting models to improve their accuracy. This paper presents a general approach to integrating the time component into forecasting models. The main idea is to employ conditional neural fields to represent the auxiliary features extracted from the time component to obtain the global information, which will be effectively combined with the local information extracted from autoregressive neural networks through a layer-wise gated fusion module. Extensive experiments on road traffic and cellular network traffic datasets prove the effectiveness of the proposed approach.
['Demin Lu', 'Zonghua Zhang', 'Duc-Thinh Ngo', 'Minh-Thanh Bui']
2023-05-11
null
null
null
null
['open-question']
['natural-language-processing']
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[6.685892105102539, 2.7856557369232178]
d2222cd0-7e7d-4a1e-829a-a619e91d8d8a
multimodal-analogical-reasoning-over
2210.00312
null
https://arxiv.org/abs/2210.00312v4
https://arxiv.org/pdf/2210.00312v4.pdf
Multimodal Analogical Reasoning over Knowledge Graphs
Analogical reasoning is fundamental to human cognition and holds an important place in various fields. However, previous studies mainly focus on single-modal analogical reasoning and ignore taking advantage of structure knowledge. Notably, the research in cognitive psychology has demonstrated that information from multimodal sources always brings more powerful cognitive transfer than single modality sources. To this end, we introduce the new task of multimodal analogical reasoning over knowledge graphs, which requires multimodal reasoning ability with the help of background knowledge. Specifically, we construct a Multimodal Analogical Reasoning dataSet (MARS) and a multimodal knowledge graph MarKG. We evaluate with multimodal knowledge graph embedding and pre-trained Transformer baselines, illustrating the potential challenges of the proposed task. We further propose a novel model-agnostic Multimodal analogical reasoning framework with Transformer (MarT) motivated by the structure mapping theory, which can obtain better performance. Code and datasets are available in https://github.com/zjunlp/MKG_Analogy.
['Huajun Chen', 'Shumin Deng', 'Xiaozhuan Liang', 'Xiang Chen', 'Lei LI', 'Ningyu Zhang']
2022-10-01
null
null
null
null
['knowledge-graph-embedding']
['graphs']
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[10.659477233886719, 1.80960214138031]
25bcfc98-3bcc-4448-bdd6-626d7c2ffc76
convolutional-fine-grained-classification
2208.01997
null
https://arxiv.org/abs/2208.01997v1
https://arxiv.org/pdf/2208.01997v1.pdf
Convolutional Fine-Grained Classification with Self-Supervised Target Relation Regularization
Fine-grained visual classification can be addressed by deep representation learning under supervision of manually pre-defined targets (e.g., one-hot or the Hadamard codes). Such target coding schemes are less flexible to model inter-class correlation and are sensitive to sparse and imbalanced data distribution as well. In light of this, this paper introduces a novel target coding scheme -- dynamic target relation graphs (DTRG), which, as an auxiliary feature regularization, is a self-generated structural output to be mapped from input images. Specifically, online computation of class-level feature centers is designed to generate cross-category distance in the representation space, which can thus be depicted by a dynamic graph in a non-parametric manner. Explicitly minimizing intra-class feature variations anchored on those class-level centers can encourage learning of discriminative features. Moreover, owing to exploiting inter-class dependency, the proposed target graphs can alleviate data sparsity and imbalanceness in representation learning. Inspired by recent success of the mixup style data augmentation, this paper introduces randomness into soft construction of dynamic target relation graphs to further explore relation diversity of target classes. Experimental results can demonstrate the effectiveness of our method on a number of diverse benchmarks of multiple visual classification tasks, especially achieving the state-of-the-art performance on popular fine-grained object benchmarks and superior robustness against sparse and imbalanced data. Source codes are made publicly available at https://github.com/AkonLau/DTRG.
['Kui Jia', 'Ke Chen', 'KangJun Liu']
2022-08-03
null
null
null
null
['fine-grained-image-classification']
['computer-vision']
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[9.631376266479492, 2.1402688026428223]
3b19b719-6d92-4193-8ac5-b4fc28d710a0
netket-3-machine-learning-toolbox-for-many
2112.10526
null
https://arxiv.org/abs/2112.10526v2
https://arxiv.org/pdf/2112.10526v2.pdf
NetKet 3: Machine Learning Toolbox for Many-Body Quantum Systems
We introduce version 3 of NetKet, the machine learning toolbox for many-body quantum physics. NetKet is built around neural-network quantum states and provides efficient algorithms for their evaluation and optimization. This new version is built on top of JAX, a differentiable programming and accelerated linear algebra framework for the Python programming language. The most significant new feature is the possibility to define arbitrary neural network ans\"atze in pure Python code using the concise notation of machine-learning frameworks, which allows for just-in-time compilation as well as the implicit generation of gradients thanks to automatic differentiation. NetKet 3 also comes with support for GPU and TPU accelerators, advanced support for discrete symmetry groups, chunking to scale up to thousands of degrees of freedom, drivers for quantum dynamics applications, and improved modularity, allowing users to use only parts of the toolbox as a foundation for their own code.
['Giuseppe Carleo', 'Nikita Astrakhantsev', 'Vladimir Vargas-Calderon', 'Jannes Nys', 'Gabriel Pescia', 'Clemens Giuliani', 'Christopher Roth', 'Dian Wu', 'Attila Szabó', 'Damian Hofmann', 'Filippo Vicentini']
2021-12-20
null
null
null
null
['quantum-state-tomography', 'variational-monte-carlo']
['medical', 'miscellaneous']
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[5.468382358551025, 4.978702068328857]
9a932829-21aa-4bf4-8028-bcb0d7477418
large-scale-pre-training-for-person-re
2203.16533
null
https://arxiv.org/abs/2203.16533v2
https://arxiv.org/pdf/2203.16533v2.pdf
Large-Scale Pre-training for Person Re-identification with Noisy Labels
This paper aims to address the problem of pre-training for person re-identification (Re-ID) with noisy labels. To setup the pre-training task, we apply a simple online multi-object tracking system on raw videos of an existing unlabeled Re-ID dataset "LUPerson" nd build the Noisy Labeled variant called "LUPerson-NL". Since theses ID labels automatically derived from tracklets inevitably contain noises, we develop a large-scale Pre-training framework utilizing Noisy Labels (PNL), which consists of three learning modules: supervised Re-ID learning, prototype-based contrastive learning, and label-guided contrastive learning. In principle, joint learning of these three modules not only clusters similar examples to one prototype, but also rectifies noisy labels based on the prototype assignment. We demonstrate that learning directly from raw videos is a promising alternative for pre-training, which utilizes spatial and temporal correlations as weak supervision. This simple pre-training task provides a scalable way to learn SOTA Re-ID representations from scratch on "LUPerson-NL" without bells and whistles. For example, by applying on the same supervised Re-ID method MGN, our pre-trained model improves the mAP over the unsupervised pre-training counterpart by 5.7%, 2.2%, 2.3% on CUHK03, DukeMTMC, and MSMT17 respectively. Under the small-scale or few-shot setting, the performance gain is even more significant, suggesting a better transferability of the learned representation. Code is available at https://github.com/DengpanFu/LUPerson-NL
['Dong Chen', 'Fang Wen', 'Houqiang Li', 'Lei Zhang', 'Lu Yuan', 'Jianmin Bao', 'Hao Yang', 'Dongdong Chen', 'Dengpan Fu']
2022-03-30
null
http://openaccess.thecvf.com//content/CVPR2022/html/Fu_Large-Scale_Pre-Training_for_Person_Re-Identification_With_Noisy_Labels_CVPR_2022_paper.html
http://openaccess.thecvf.com//content/CVPR2022/papers/Fu_Large-Scale_Pre-Training_for_Person_Re-Identification_With_Noisy_Labels_CVPR_2022_paper.pdf
cvpr-2022-1
['online-multi-object-tracking', 'unsupervised-pre-training']
['computer-vision', 'methodology']
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[14.774704933166504, 1.1300017833709717]
43e267b4-2c89-412a-86b2-793112ea173f
spacephish-the-evasion-space-of-adversarial
2210.13660
null
https://arxiv.org/abs/2210.13660v1
https://arxiv.org/pdf/2210.13660v1.pdf
SpacePhish: The Evasion-space of Adversarial Attacks against Phishing Website Detectors using Machine Learning
Existing literature on adversarial Machine Learning (ML) focuses either on showing attacks that break every ML model, or defenses that withstand most attacks. Unfortunately, little consideration is given to the actual \textit{cost} of the attack or the defense. Moreover, adversarial samples are often crafted in the "feature-space", making the corresponding evaluations of questionable value. Simply put, the current situation does not allow to estimate the actual threat posed by adversarial attacks, leading to a lack of secure ML systems. We aim to clarify such confusion in this paper. By considering the application of ML for Phishing Website Detection (PWD), we formalize the "evasion-space" in which an adversarial perturbation can be introduced to fool a ML-PWD -- demonstrating that even perturbations in the "feature-space" are useful. Then, we propose a realistic threat model describing evasion attacks against ML-PWD that are cheap to stage, and hence intrinsically more attractive for real phishers. Finally, we perform the first statistically validated assessment of state-of-the-art ML-PWD against 12 evasion attacks. Our evaluation shows (i) the true efficacy of evasion attempts that are more likely to occur; and (ii) the impact of perturbations crafted in different evasion-spaces. Our realistic evasion attempts induce a statistically significant degradation (3-10% at $p\!<$0.05), and their cheap cost makes them a subtle threat. Notably, however, some ML-PWD are immune to our most realistic attacks ($p$=0.22). Our contribution paves the way for a much needed re-assessment of adversarial attacks against ML systems for cybersecurity.
['Ying Yuan', 'Mauro Conti', 'Giovanni Apruzzese']
2022-10-24
null
null
null
null
['phishing-website-detection']
['adversarial']
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[5.826358318328857, 7.687694072723389]
602e6c9a-867e-4380-a7c9-491127ba27ac
rethinking-of-pedestrian-attribute
2005.11909
null
https://arxiv.org/abs/2005.11909v2
https://arxiv.org/pdf/2005.11909v2.pdf
Rethinking of Pedestrian Attribute Recognition: Realistic Datasets with Efficient Method
Despite various methods are proposed to make progress in pedestrian attribute recognition, a crucial problem on existing datasets is often neglected, namely, a large number of identical pedestrian identities in train and test set, which is not consistent with practical application. Thus, images of the same pedestrian identity in train set and test set are extremely similar, leading to overestimated performance of state-of-the-art methods on existing datasets. To address this problem, we propose two realistic datasets PETA\textsubscript{$zs$} and RAPv2\textsubscript{$zs$} following zero-shot setting of pedestrian identities based on PETA and RAPv2 datasets. Furthermore, compared to our strong baseline method, we have observed that recent state-of-the-art methods can not make performance improvement on PETA, RAPv2, PETA\textsubscript{$zs$} and RAPv2\textsubscript{$zs$}. Thus, through solving the inherent attribute imbalance in pedestrian attribute recognition, an efficient method is proposed to further improve the performance. Experiments on existing and proposed datasets verify the superiority of our method by achieving state-of-the-art performance.
['Houjing Huang', 'Xiaotang Chen', 'Wenjie Yang', 'Kaiqi Huang', 'Jian Jia']
2020-05-25
null
null
null
null
['pedestrian-attribute-recognition']
['computer-vision']
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[14.538678169250488, 0.9516131281852722]
4e3d356a-b778-4306-bb31-5c11537abe51
machine-vision-based-sample-tube-localization
2103.09942
null
https://arxiv.org/abs/2103.09942v1
https://arxiv.org/pdf/2103.09942v1.pdf
Machine Vision based Sample-Tube Localization for Mars Sample Return
A potential Mars Sample Return (MSR) architecture is being jointly studied by NASA and ESA. As currently envisioned, the MSR campaign consists of a series of 3 missions: sample cache, fetch and return to Earth. In this paper, we focus on the fetch part of the MSR, and more specifically the problem of autonomously detecting and localizing sample tubes deposited on the Martian surface. Towards this end, we study two machine-vision based approaches: First, a geometry-driven approach based on template matching that uses hard-coded filters and a 3D shape model of the tube; and second, a data-driven approach based on convolutional neural networks (CNNs) and learned features. Furthermore, we present a large benchmark dataset of sample-tube images, collected in representative outdoor environments and annotated with ground truth segmentation masks and locations. The dataset was acquired systematically across different terrain, illumination conditions and dust-coverage; and benchmarking was performed to study the feasibility of each approach, their relative strengths and weaknesses, and robustness in the presence of adverse environmental conditions.
['Renaud Detry', 'Eric Kulczyski', 'John Mayo', 'Alex Brinkman', 'Mark Van der Merwe', 'Gerard Maggiolino', 'Peter Ilhardt', 'Tu-Hoa Pham', 'William Seto', 'Barry Ridge', 'Shreyansh Daftry']
2021-03-17
null
null
null
null
['template-matching']
['computer-vision']
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[8.279158592224121, -1.7710552215576172]
278902c8-f018-4e21-bc05-36f61ab78ad3
robust-speech-recognition-via-large-scale-1
2212.04356
null
https://arxiv.org/abs/2212.04356v1
https://arxiv.org/pdf/2212.04356v1.pdf
Robust Speech Recognition via Large-Scale Weak Supervision
We study the capabilities of speech processing systems trained simply to predict large amounts of transcripts of audio on the internet. When scaled to 680,000 hours of multilingual and multitask supervision, the resulting models generalize well to standard benchmarks and are often competitive with prior fully supervised results but in a zero-shot transfer setting without the need for any fine-tuning. When compared to humans, the models approach their accuracy and robustness. We are releasing models and inference code to serve as a foundation for further work on robust speech processing.
['Ilya Sutskever', 'Christine McLeavey', 'Greg Brockman', 'Tao Xu', 'Jong Wook Kim', 'Alec Radford']
2022-12-06
robust-speech-recognition-via-large-scale
https://openai.com/blog/whisper/
https://cdn.openai.com/papers/whisper.pdf
preprint-2022-9
['robust-speech-recognition']
['speech']
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[14.298524856567383, 6.9539947509765625]
14930df2-af6c-4751-81f0-3013c36ce66f
towards-semi-supervised-universal-graph
2305.19598
null
https://arxiv.org/abs/2305.19598v1
https://arxiv.org/pdf/2305.19598v1.pdf
Towards Semi-supervised Universal Graph Classification
Graph neural networks have pushed state-of-the-arts in graph classifications recently. Typically, these methods are studied within the context of supervised end-to-end training, which necessities copious task-specific labels. However, in real-world circumstances, labeled data could be limited, and there could be a massive corpus of unlabeled data, even from unknown classes as a complementary. Towards this end, we study the problem of semi-supervised universal graph classification, which not only identifies graph samples which do not belong to known classes, but also classifies the remaining samples into their respective classes. This problem is challenging due to a severe lack of labels and potential class shifts. In this paper, we propose a novel graph neural network framework named UGNN, which makes the best of unlabeled data from the subgraph perspective. To tackle class shifts, we estimate the certainty of unlabeled graphs using multiple subgraphs, which facilities the discovery of unlabeled data from unknown categories. Moreover, we construct semantic prototypes in the embedding space for both known and unknown categories and utilize posterior prototype assignments inferred from the Sinkhorn-Knopp algorithm to learn from abundant unlabeled graphs across different subgraph views. Extensive experiments on six datasets verify the effectiveness of UGNN in different settings.
['Ming Zhang', 'Wei Ju', 'Yifang Qin', 'Yusheng Zhao', 'Xiao Luo']
2023-05-31
null
null
null
null
['graph-classification']
['graphs']
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[7.379183769226074, 6.151130676269531]
615ae3aa-fa7c-48a3-8cf6-f59ba3149c94
automatic-gaze-analysis-a-survey-of
2108.05479
null
https://arxiv.org/abs/2108.05479v3
https://arxiv.org/pdf/2108.05479v3.pdf
Automatic Gaze Analysis: A Survey of Deep Learning based Approaches
Eye gaze analysis is an important research problem in the field of Computer Vision and Human-Computer Interaction. Even with notable progress in the last 10 years, automatic gaze analysis still remains challenging due to the uniqueness of eye appearance, eye-head interplay, occlusion, image quality, and illumination conditions. There are several open questions, including what are the important cues to interpret gaze direction in an unconstrained environment without prior knowledge and how to encode them in real-time. We review the progress across a range of gaze analysis tasks and applications to elucidate these fundamental questions, identify effective methods in gaze analysis, and provide possible future directions. We analyze recent gaze estimation and segmentation methods, especially in the unsupervised and weakly supervised domain, based on their advantages and reported evaluation metrics. Our analysis shows that the development of a robust and generic gaze analysis method still needs to address real-world challenges such as unconstrained setup and learning with less supervision. We conclude by discussing future research directions for designing a real-world gaze analysis system that can propagate to other domains including Computer Vision, Augmented Reality (AR), Virtual Reality (VR), and Human Computer Interaction (HCI). Project Page: https://github.com/i-am-shreya/EyeGazeSurvey}{https://github.com/i-am-shreya/EyeGazeSurvey
['Qiang Ji', 'Jarrod Knibbe', 'Munawar Hayat', 'Abhinav Dhall', 'Shreya Ghosh']
2021-08-12
null
null
null
null
['gaze-estimation']
['computer-vision']
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[14.103230476379395, 0.10896507650613785]
c38e8d34-e11c-41ee-8a38-e2dc92c7b4fe
medical-code-prediction-from-discharge
2106.07932
null
https://arxiv.org/abs/2106.07932v4
https://arxiv.org/pdf/2106.07932v4.pdf
Medical Code Prediction from Discharge Summary: Document to Sequence BERT using Sequence Attention
Clinical notes are unstructured text generated by clinicians during patient encounters. Clinical notes are usually accompanied by a set of metadata codes from the International Classification of Diseases(ICD). ICD code is an important code used in various operations, including insurance, reimbursement, medical diagnosis, etc. Therefore, it is important to classify ICD codes quickly and accurately. However, annotating these codes is costly and time-consuming. So we propose a model based on bidirectional encoder representations from transformers (BERT) using the sequence attention method for automatic ICD code assignment. We evaluate our approach on the medical information mart for intensive care III (MIMIC-III) benchmark dataset. Our model achieved performance of macro-averaged F1: 0.62898 and micro-averaged F1: 0.68555 and is performing better than a performance of the state-of-the-art model using the MIMIC-III dataset. The contribution of this study proposes a method of using BERT that can be applied to documents and a sequence attention method that can capture important sequence in-formation appearing in documents.
['Kyungsun Kim', 'Byeong-Cheol Jo', 'Yeongjoon Park', 'Yongmin Yoo', 'Tak-Sung Heo']
2021-06-15
null
null
null
null
['medical-code-prediction']
['medical']
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[8.000174522399902, 6.841665744781494]
71347f7a-bc9e-486c-8399-047891f4e6f7
knowledge-distillation-from-ensemble-of
2108.09183
null
https://arxiv.org/abs/2108.09183v2
https://arxiv.org/pdf/2108.09183v2.pdf
Boosting of Head Pose Estimation by Knowledge Distillation
We propose a response-based method of knowledge distillation (KD) for the head pose estimation problem. A student model trained by the proposed KD achieves results better than a teacher model, which is atypical for the response-based method. Our method consists of two stages. In the first stage, we trained the base neural network (NN), which has one regression head and four regression via classification (RvC) heads. We build the convolutional ensemble over the base NN using offsets of face bounding boxes over a regular grid. In the second stage, we perform KD from the convolutional ensemble into the final NN with one RvC head. The KD improves the results by an average of 7.7\% compared to base NN. This feature makes it possible to use KD as a booster and effectively train deeper NNs. NNs trained by our KD method partially improved the state-of-the-art results. KD-ResNet152 has the best results, and KD-ResNet18 has a better result on the AFLW2000 dataset than any previous method.We have made publicly available trained NNs and face bounding boxes for the 300W-LP, AFLW, AFLW2000, and BIWI datasets.Our method potentially can be effective for other regression problems.
['Victor Samun', 'Andrey Sheka']
2021-08-20
null
null
null
null
['head-pose-estimation']
['computer-vision']
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[13.630918502807617, 0.34267160296440125]
88e044a7-bc6b-4fa6-938e-a6fb8cabf56d
building-accurate-low-latency-asr-for
2305.18596
null
https://arxiv.org/abs/2305.18596v1
https://arxiv.org/pdf/2305.18596v1.pdf
Building Accurate Low Latency ASR for Streaming Voice Search
Automatic Speech Recognition (ASR) plays a crucial role in voice-based applications. For applications requiring real-time feedback like Voice Search, streaming capability becomes vital. While LSTM/RNN and CTC based ASR systems are commonly employed for low-latency streaming applications, they often exhibit lower accuracy compared to state-of-the-art models due to a lack of future audio frames. In this work, we focus on developing accurate LSTM, attention, and CTC based streaming ASR models for large-scale Hinglish (a blend of Hindi and English) Voice Search. We investigate various modifications in vanilla LSTM training which enhance the system's accuracy while preserving its streaming capabilities. We also address the critical requirement of end-of-speech (EOS) detection in streaming applications. We present a simple training and inference strategy for end-to-end CTC models that enables joint ASR and EOS detection. The evaluation of our model on Flipkart's Voice Search, which handles substantial traffic of approximately 6 million queries per day, demonstrates significant performance gains over the vanilla LSTM-CTC model. Our model achieves a word error rate (WER) of 3.69% without EOS and 4.78% with EOS while also reducing the search latency by approximately ~1300 ms (equivalent to 46.64% reduction) when compared to an independent voice activity detection (VAD) model.
['Nikesh Garera', 'Abhinav Goyal']
2023-05-29
null
null
null
null
['action-detection', 'activity-detection', 'automatic-speech-recognition']
['computer-vision', 'computer-vision', 'speech']
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[14.497220039367676, 6.55946159362793]
6144584d-8487-4c0b-abc5-dadb3126848d
regression-bugs-are-in-your-model-measuring
2105.03048
null
https://arxiv.org/abs/2105.03048v1
https://arxiv.org/pdf/2105.03048v1.pdf
Regression Bugs Are In Your Model! Measuring, Reducing and Analyzing Regressions In NLP Model Updates
Behavior of deep neural networks can be inconsistent between different versions. Regressions during model update are a common cause of concern that often over-weigh the benefits in accuracy or efficiency gain. This work focuses on quantifying, reducing and analyzing regression errors in the NLP model updates. Using negative flip rate as regression measure, we show that regression has a prevalent presence across tasks in the GLUE benchmark. We formulate the regression-free model updates into a constrained optimization problem, and further reduce it into a relaxed form which can be approximately optimized through knowledge distillation training method. We empirically analyze how model ensemble reduces regression. Finally, we conduct CheckList behavioral testing to understand the distribution of regressions across linguistic phenomena, and the efficacy of ensemble and distillation methods.
['Stefano Soatto', 'Yi Zhang', 'Yuanjun Xiong', 'Yi-An Lai', 'Yuqing Xie']
2021-05-07
null
https://aclanthology.org/2021.acl-long.515
https://aclanthology.org/2021.acl-long.515.pdf
acl-2021-5
['negative-flip-rate']
['computer-vision']
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[10.660789489746094, 8.232978820800781]
faeaec64-63d5-4305-b335-8848d74410ad
compositional-sketch-search
2106.08009
null
https://arxiv.org/abs/2106.08009v1
https://arxiv.org/pdf/2106.08009v1.pdf
Compositional Sketch Search
We present an algorithm for searching image collections using free-hand sketches that describe the appearance and relative positions of multiple objects. Sketch based image retrieval (SBIR) methods predominantly match queries containing a single, dominant object invariant to its position within an image. Our work exploits drawings as a concise and intuitive representation for specifying entire scene compositions. We train a convolutional neural network (CNN) to encode masked visual features from sketched objects, pooling these into a spatial descriptor encoding the spatial relationships and appearances of objects in the composition. Training the CNN backbone as a Siamese network under triplet loss yields a metric search embedding for measuring compositional similarity which may be efficiently leveraged for visual search by applying product quantization.
['John Collomosse', 'Hailin Jin', 'Long Mai', 'Tu Bui', 'Alexander Black']
2021-06-15
null
null
null
null
['sketch-based-image-retrieval']
['computer-vision']
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[11.640660285949707, 0.5519562363624573]
142ecea9-0db3-4a48-a17b-628549f8a990
multivariate-pair-trading-by-volatility-model
2106.09132
null
https://arxiv.org/abs/2106.09132v1
https://arxiv.org/pdf/2106.09132v1.pdf
Multivariate Pair Trading by Volatility & Model Adaption Trade-off
Pair trading is one of the most discussed topics among financial researches. Despite a growing base of work, portfolio management for multivariate time series is rarely discussed. On the other hand, most researches focus on refining strategy rules instead of finding the optimal portfolio weight. In this paper, we brought up a simple yet profitable strategy called Volatility & Model Adaption Trade-off (VMAT) to leverage the issues. Experiment studies show its superior profit performance over baselines.
['Tianyang Xie', 'Chenyanzi Yu']
2021-06-11
null
null
null
null
['pair-trading']
['time-series']
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[4.700611591339111, 4.03399133682251]
3ef62ba5-e1fe-487a-8ddb-88658da579bb
sg-translate-together-uplifting-singapores
null
null
https://aclanthology.org/2022.amta-upg.28
https://aclanthology.org/2022.amta-upg.28.pdf
SG Translate Together - Uplifting Singapore’s translation standards with the community through technology
The Singapore’s Ministry of Communications and Information (MCI) has officially launched the SG Translate Together (SGTT) web portal on 27 June 2022, with the aim of partnering its citizens to improve translation standards in Singapore. This web portal houses the Singapore Government’s first neural machine translation (MT) engine, known as SG Translate, which was jointly developed by MCI and the Institute for Infocomm Research (I2R), Agency for Science, Technology and Research (A*STAR). Adapted using localised translation data, SG Translate is able to generate translations that are attuned to Singapore’s context and supports Singapore’s four (4) official languages – English (Singapore), Chinese (Singapore), Bahasa Melayu (Singapore) and Tamil (Singapore). Upon completion of development, MCI allowed all Government agencies to use SG Translate for their daily operations. This presentation will briefly cover the methodologies adopted and showcase SG Translate’s capability to translate content involving local culture, everyday life and government policies and schemes. This presentation will also showcase MCI’s sustainable approach for the continual training of the SG Translate MT engine through citizenry participation.
['Nabilah Binte Md Johan', 'Tarun Kumar Vangani', 'Ding Yang', 'Zheng Weihua', 'Wu Kui', 'Aw Ai Ti', 'Sarina Mohamed Rasol', 'Gayathri Ayathorai', 'Foo Yong Xiang', 'Siti Amirah', 'Gowri Kanagarajah', 'Adeline Sim', 'Lee Siew Li']
null
null
null
null
amta-2022-9
['culture']
['speech']
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[11.485623359680176, 10.419071197509766]
5ec57a14-949e-4617-bc96-9e3d48054a43
residual-dense-network-for-image-super
1802.08797
null
http://arxiv.org/abs/1802.08797v2
http://arxiv.org/pdf/1802.08797v2.pdf
Residual Dense Network for Image Super-Resolution
A very deep convolutional neural network (CNN) has recently achieved great success for image super-resolution (SR) and offered hierarchical features as well. However, most deep CNN based SR models do not make full use of the hierarchical features from the original low-resolution (LR) images, thereby achieving relatively-low performance. In this paper, we propose a novel residual dense network (RDN) to address this problem in image SR. We fully exploit the hierarchical features from all the convolutional layers. Specifically, we propose residual dense block (RDB) to extract abundant local features via dense connected convolutional layers. RDB further allows direct connections from the state of preceding RDB to all the layers of current RDB, leading to a contiguous memory (CM) mechanism. Local feature fusion in RDB is then used to adaptively learn more effective features from preceding and current local features and stabilizes the training of wider network. After fully obtaining dense local features, we use global feature fusion to jointly and adaptively learn global hierarchical features in a holistic way. Extensive experiments on benchmark datasets with different degradation models show that our RDN achieves favorable performance against state-of-the-art methods.
['Yulun Zhang', 'Yu Kong', 'Yapeng Tian', 'Bineng Zhong', 'Yun Fu']
2018-02-24
residual-dense-network-for-image-super-1
http://openaccess.thecvf.com/content_cvpr_2018/html/Zhang_Residual_Dense_Network_CVPR_2018_paper.html
http://openaccess.thecvf.com/content_cvpr_2018/papers/Zhang_Residual_Dense_Network_CVPR_2018_paper.pdf
cvpr-2018-6
['color-image-denoising']
['computer-vision']
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[11.00069808959961, -1.989983081817627]
a2d1d375-8e76-4f6c-8c28-31a2adff3b27
a-unified-framework-of-predicting-binary
1910.05996
null
https://arxiv.org/abs/1910.05996v1
https://arxiv.org/pdf/1910.05996v1.pdf
A unified framework of predicting binary interestingness of images based on discriminant correlation analysis and multiple kernel learning
In the modern content-based image retrieval systems, there is an increasingly interest in constructing a computationally effective model to predict the interestingness of images since the measure of image interestingness could improve the human-centered search satisfaction and the user experience in different applications. In this paper, we propose a unified framework to predict the binary interestingness of images based on discriminant correlation analysis (DCA) and multiple kernel learning (MKL) techniques. More specially, on the one hand, to reduce feature redundancy in describing the interestingness cues of images, the DCA or multi-set discriminant correlation analysis (MDCA) technique is adopted to fuse multiple feature sets of the same type for individual cues by taking into account the class structure among the samples involved to describe the three classical interestingness cues, unusualness,aesthetics as well as general preferences, with three sets of compact and representative features; on the other hand, to make good use of the heterogeneity from the three sets of high-level features for describing the interestingness cues, the SimpleMKL method is employed to enhance the generalization ability of the built model for the task of the binary interestingness classification. Experimental results on the publicly-released interestingness prediction data set have demonstrated the rationality and effectiveness of the proposed framework in the binary prediction of image interestingness where we have conducted several groups of comparative studies across different interestingness feature combinations, different interestingness cues, as well as different feature types for the three interestingness cues.
['Yuxiang Yang', 'Maohui Li', 'Liting Wang', 'Longtao Zhang', 'Qiang Sun']
2019-10-14
null
null
null
null
['content-based-image-retrieval']
['computer-vision']
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[10.691283226013184, 0.9112085700035095]
297127f2-bb46-4dad-b2b3-2cb2e6a43ac8
infinite-dimensional-optimization-and
2205.15368
null
https://arxiv.org/abs/2205.15368v1
https://arxiv.org/pdf/2205.15368v1.pdf
Infinite-dimensional optimization and Bayesian nonparametric learning of stochastic differential equations
The paper has two major themes. The first part of the paper establishes certain general results for infinite-dimensional optimization problems on Hilbert spaces. These results cover the classical representer theorem and many of its variants as special cases and offer a wider scope of applications. The second part of the paper then develops a systematic approach for learning the drift function of a stochastic differential equation by integrating the results of the first part with Bayesian hierarchical framework. Importantly, our Baysian approach incorporates low-cost sparse learning through proper use of shrinkage priors while allowing proper quantification of uncertainty through posterior distributions. Several examples at the end illustrate the accuracy of our learning scheme.
['Jinpu Zhou', 'Riten Mitra', 'Arnab Ganguly']
2022-05-30
null
null
null
null
['sparse-learning']
['methodology']
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[6.976744651794434, 4.144832134246826]
65a22bce-72ef-4128-8330-3d5bd6539f1e
unimodal-concentrated-loss-fully-adaptive
2204.00309
null
https://arxiv.org/abs/2204.00309v1
https://arxiv.org/pdf/2204.00309v1.pdf
Unimodal-Concentrated Loss: Fully Adaptive Label Distribution Learning for Ordinal Regression
Learning from a label distribution has achieved promising results on ordinal regression tasks such as facial age and head pose estimation wherein, the concept of adaptive label distribution learning (ALDL) has drawn lots of attention recently for its superiority in theory. However, compared with the methods assuming fixed form label distribution, ALDL methods have not achieved better performance. We argue that existing ALDL algorithms do not fully exploit the intrinsic properties of ordinal regression. In this paper, we emphatically summarize that learning an adaptive label distribution on ordinal regression tasks should follow three principles. First, the probability corresponding to the ground-truth should be the highest in label distribution. Second, the probabilities of neighboring labels should decrease with the increase of distance away from the ground-truth, i.e., the distribution is unimodal. Third, the label distribution should vary with samples changing, and even be distinct for different instances with the same label, due to the different levels of difficulty and ambiguity. Under the premise of these principles, we propose a novel loss function for fully adaptive label distribution learning, namely unimodal-concentrated loss. Specifically, the unimodal loss derived from the learning to rank strategy constrains the distribution to be unimodal. Furthermore, the estimation error and the variance of the predicted distribution for a specific sample are integrated into the proposed concentrated loss to make the predicted distribution maximize at the ground-truth and vary according to the predicting uncertainty. Extensive experimental results on typical ordinal regression tasks including age and head pose estimation, show the superiority of our proposed unimodal-concentrated loss compared with existing loss functions.
['ShiLiang Pu', 'Chunmao Wang', 'Jingwei Yan', 'Pengju Yang', 'Yachun Li', 'Zhaoliang Yao', 'Jingjing Wang', 'Qiang Li']
2022-04-01
null
http://openaccess.thecvf.com//content/CVPR2022/html/Li_Unimodal-Concentrated_Loss_Fully_Adaptive_Label_Distribution_Learning_for_Ordinal_Regression_CVPR_2022_paper.html
http://openaccess.thecvf.com//content/CVPR2022/papers/Li_Unimodal-Concentrated_Loss_Fully_Adaptive_Label_Distribution_Learning_for_Ordinal_Regression_CVPR_2022_paper.pdf
cvpr-2022-1
['head-pose-estimation']
['computer-vision']
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[9.769686698913574, 3.666600465774536]
71f09953-77a8-47c3-993a-585eb64d6b8c
3dmm-rf-convolutional-radiance-fields-for-3d
2209.07366
null
https://arxiv.org/abs/2209.07366v1
https://arxiv.org/pdf/2209.07366v1.pdf
3DMM-RF: Convolutional Radiance Fields for 3D Face Modeling
Facial 3D Morphable Models are a main computer vision subject with countless applications and have been highly optimized in the last two decades. The tremendous improvements of deep generative networks have created various possibilities for improving such models and have attracted wide interest. Moreover, the recent advances in neural radiance fields, are revolutionising novel-view synthesis of known scenes. In this work, we present a facial 3D Morphable Model, which exploits both of the above, and can accurately model a subject's identity, pose and expression and render it in arbitrary illumination. This is achieved by utilizing a powerful deep style-based generator to overcome two main weaknesses of neural radiance fields, their rigidity and rendering speed. We introduce a style-based generative network that synthesizes in one pass all and only the required rendering samples of a neural radiance field. We create a vast labelled synthetic dataset of facial renders, and train the network on these data, so that it can accurately model and generalize on facial identity, pose and appearance. Finally, we show that this model can accurately be fit to "in-the-wild" facial images of arbitrary pose and illumination, extract the facial characteristics, and be used to re-render the face in controllable conditions.
['Stefanos Zafeiriou', 'Alexandros Lattas', 'Baris Gecer', 'Stathis Galanakis']
2022-09-15
null
null
null
null
['3d-face-modeling']
['computer-vision']
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[12.760024070739746, -0.22108587622642517]
f2670a99-f923-4052-8226-6dbf944ad127
3d-neural-embedding-likelihood-for-robust-sim
2302.03744
null
https://arxiv.org/abs/2302.03744v2
https://arxiv.org/pdf/2302.03744v2.pdf
3D Neural Embedding Likelihood for Robust Probabilistic Inverse Graphics
The ability to perceive and understand 3D scenes is crucial for many applications in computer vision and robotics. Inverse graphics is an appealing approach to 3D scene understanding that aims to infer the 3D scene structure from 2D images. In this paper, we introduce probabilistic modeling to the inverse graphics framework to quantify uncertainty and achieve robustness in 6D pose estimation tasks. Specifically, we propose 3D Neural Embedding Likelihood (3DNEL) as a unified probabilistic model over RGB-D images, and develop efficient inference procedures on 3D scene descriptions. 3DNEL effectively combines learned neural embeddings from RGB with depth information to improve robustness in sim-to-real 6D object pose estimation from RGB-D images. Performance on the YCB-Video dataset is on par with state-of-the-art yet is much more robust in challenging regimes. In contrast to discriminative approaches, 3DNEL's probabilistic generative formulation jointly models multi-object scenes, quantifies uncertainty in a principled way, and handles object pose tracking under heavy occlusion. Finally, 3DNEL provides a principled framework for incorporating prior knowledge about the scene and objects, which allows natural extension to additional tasks like camera pose tracking from video.
['Vikash K. Mansinghka', 'Dileep George', 'Miguel Lázaro-Gredilla', 'Dan Gutfreund', 'Joshua B. Tenenbaum', 'Lirui Wang', 'Nishad Gothoskar', 'Guangyao Zhou']
2023-02-07
null
null
null
null
['pose-tracking', '6d-pose-estimation-1', '6d-pose-estimation']
['computer-vision', 'computer-vision', 'computer-vision']
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[7.811493873596191, -2.713285446166992]
ba2be0bd-2a2c-49a4-b295-e84f4f635fcb
flexmatch-boosting-semi-supervised-learning
2110.08263
null
https://arxiv.org/abs/2110.08263v3
https://arxiv.org/pdf/2110.08263v3.pdf
FlexMatch: Boosting Semi-Supervised Learning with Curriculum Pseudo Labeling
The recently proposed FixMatch achieved state-of-the-art results on most semi-supervised learning (SSL) benchmarks. However, like other modern SSL algorithms, FixMatch uses a pre-defined constant threshold for all classes to select unlabeled data that contribute to the training, thus failing to consider different learning status and learning difficulties of different classes. To address this issue, we propose Curriculum Pseudo Labeling (CPL), a curriculum learning approach to leverage unlabeled data according to the model's learning status. The core of CPL is to flexibly adjust thresholds for different classes at each time step to let pass informative unlabeled data and their pseudo labels. CPL does not introduce additional parameters or computations (forward or backward propagation). We apply CPL to FixMatch and call our improved algorithm FlexMatch. FlexMatch achieves state-of-the-art performance on a variety of SSL benchmarks, with especially strong performances when the labeled data are extremely limited or when the task is challenging. For example, FlexMatch achieves 13.96% and 18.96% error rate reduction over FixMatch on CIFAR-100 and STL-10 datasets respectively, when there are only 4 labels per class. CPL also significantly boosts the convergence speed, e.g., FlexMatch can use only 1/5 training time of FixMatch to achieve even better performance. Furthermore, we show that CPL can be easily adapted to other SSL algorithms and remarkably improve their performances. We open-source our code at https://github.com/TorchSSL/TorchSSL.
['Takahiro Shinozaki', 'Manabu Okumura', 'Jindong Wang', 'Hao Wu', 'Wenxin Hou', 'Yidong Wang', 'BoWen Zhang']
2021-10-15
null
http://proceedings.neurips.cc/paper/2021/hash/995693c15f439e3d189b06e89d145dd5-Abstract.html
http://proceedings.neurips.cc/paper/2021/file/995693c15f439e3d189b06e89d145dd5-Paper.pdf
neurips-2021-12
['semi-supervised-image-classification']
['computer-vision']
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[9.493011474609375, 3.5035293102264404]
91c9d8fd-98cd-4bb4-a277-39bd342ee258
moral-machine-or-tyranny-of-the-majority
2305.17319
null
https://arxiv.org/abs/2305.17319v1
https://arxiv.org/pdf/2305.17319v1.pdf
Moral Machine or Tyranny of the Majority?
With Artificial Intelligence systems increasingly applied in consequential domains, researchers have begun to ask how these systems ought to act in ethically charged situations where even humans lack consensus. In the Moral Machine project, researchers crowdsourced answers to "Trolley Problems" concerning autonomous vehicles. Subsequently, Noothigattu et al. (2018) proposed inferring linear functions that approximate each individual's preferences and aggregating these linear models by averaging parameters across the population. In this paper, we examine this averaging mechanism, focusing on fairness concerns in the presence of strategic effects. We investigate a simple setting where the population consists of two groups, with the minority constituting an {\alpha} < 0.5 share of the population. To simplify the analysis, we consider the extreme case in which within-group preferences are homogeneous. Focusing on the fraction of contested cases where the minority group prevails, we make the following observations: (a) even when all parties report their preferences truthfully, the fraction of disputes where the minority prevails is less than proportionate in {\alpha}; (b) the degree of sub-proportionality grows more severe as the level of disagreement between the groups increases; (c) when parties report preferences strategically, pure strategy equilibria do not always exist; and (d) whenever a pure strategy equilibrium exists, the majority group prevails 100% of the time. These findings raise concerns about stability and fairness of preference vector averaging as a mechanism for aggregating diverging voices. Finally, we discuss alternatives, including randomized dictatorship and median-based mechanisms.
['Zachary C. Lipton', 'Hoda Heidari', 'Michael Feffer']
2023-05-27
null
null
null
null
['autonomous-vehicles']
['computer-vision']
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[8.812207221984863, 5.42784309387207]
34ccb50a-a9ac-47c1-98b6-417f18c5b1d5
structural-neural-additive-models-enhanced
2302.09275
null
https://arxiv.org/abs/2302.09275v1
https://arxiv.org/pdf/2302.09275v1.pdf
Structural Neural Additive Models: Enhanced Interpretable Machine Learning
Deep neural networks (DNNs) have shown exceptional performances in a wide range of tasks and have become the go-to method for problems requiring high-level predictive power. There has been extensive research on how DNNs arrive at their decisions, however, the inherently uninterpretable networks remain up to this day mostly unobservable "black boxes". In recent years, the field has seen a push towards interpretable neural networks, such as the visually interpretable Neural Additive Models (NAMs). We propose a further step into the direction of intelligibility beyond the mere visualization of feature effects and propose Structural Neural Additive Models (SNAMs). A modeling framework that combines classical and clearly interpretable statistical methods with the predictive power of neural applications. Our experiments validate the predictive performances of SNAMs. The proposed framework performs comparable to state-of-the-art fully connected DNNs and we show that SNAMs can even outperform NAMs while remaining inherently more interpretable.
['Benjamin Säfken', 'Anton Thielmann', 'Mattias Luber']
2023-02-18
null
null
null
null
['additive-models', 'interpretable-machine-learning']
['methodology', 'methodology']
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[8.880178451538086, 5.560168743133545]
2bb08eaf-13a8-4832-9dfb-634e799ab7fe
jarvix-at-semeval-2022-task-2-it-takes-one-to
2202.02394
null
https://arxiv.org/abs/2202.02394v6
https://arxiv.org/pdf/2202.02394v6.pdf
JARVix at SemEval-2022 Task 2: It Takes One to Know One? Idiomaticity Detection using Zero and One-Shot Learning
Large Language Models have been successful in a wide variety of Natural Language Processing tasks by capturing the compositionality of the text representations. In spite of their great success, these vector representations fail to capture meaning of idiomatic multi-word expressions (MWEs). In this paper, we focus on the detection of idiomatic expressions by using binary classification. We use a dataset consisting of the literal and idiomatic usage of MWEs in English and Portuguese. Thereafter, we perform the classification in two different settings: zero shot and one shot, to determine if a given sentence contains an idiom or not. N shot classification for this task is defined by N number of common idioms between the training and testing sets. In this paper, we train multiple Large Language Models in both the settings and achieve an F1 score (macro) of 0.73 for the zero shot setting and an F1 score (macro) of 0.85 for the one shot setting. An implementation of our work can be found at https://github.com/ashwinpathak20/Idiomaticity_Detection_Using_Few_Shot_Learning.
['Yash Jakhotiya', 'Vaibhav Kumar', 'Raj Shah', 'Ashwin Pathak']
2022-02-04
null
https://aclanthology.org/2022.semeval-1.19
https://aclanthology.org/2022.semeval-1.19.pdf
semeval-naacl-2022-7
['one-shot-learning']
['methodology']
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[10.586067199707031, 9.5941801071167]
858b2710-9a9c-4284-929f-7012ff8aa0f5
attentive-recurrent-tensor-model-for
1801.06792
null
http://arxiv.org/abs/1801.06792v1
http://arxiv.org/pdf/1801.06792v1.pdf
Attentive Recurrent Tensor Model for Community Question Answering
A major challenge to the problem of community question answering is the lexical and semantic gap between the sentence representations. Some solutions to minimize this gap includes the introduction of extra parameters to deep models or augmenting the external handcrafted features. In this paper, we propose a novel attentive recurrent tensor network for solving the lexical and semantic gap in community question answering. We introduce token-level and phrase-level attention strategy that maps input sequences to the output using trainable parameters. Further, we use the tensor parameters to introduce a 3-way interaction between question, answer and external features in vector space. We introduce simplified tensor matrices with L2 regularization that results in smooth optimization during training. The proposed model achieves state-of-the-art performance on the task of answer sentence selection (TrecQA and WikiQA datasets) while outperforming the current state-of-the-art on the tasks of best answer selection (Yahoo! L4) and answer triggering task (WikiQA).
['Balasubramanian Raman', 'Shivam Sharma', 'Gaurav Bhatt']
2018-01-21
null
null
null
null
['l2-regularization']
['methodology']
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[11.32333755493164, 8.053642272949219]
a3f44305-cf82-46d9-bd70-c9454d7dd720
unichart-a-universal-vision-language
2305.14761
null
https://arxiv.org/abs/2305.14761v1
https://arxiv.org/pdf/2305.14761v1.pdf
UniChart: A Universal Vision-language Pretrained Model for Chart Comprehension and Reasoning
Charts are very popular for analyzing data, visualizing key insights and answering complex reasoning questions about data. To facilitate chart-based data analysis using natural language, several downstream tasks have been introduced recently such as chart question answering and chart summarization. However, most of the methods that solve these tasks use pretraining on language or vision-language tasks that do not attempt to explicitly model the structure of the charts (e.g., how data is visually encoded and how chart elements are related to each other). To address this, we first build a large corpus of charts covering a wide variety of topics and visual styles. We then present UniChart, a pretrained model for chart comprehension and reasoning. UniChart encodes the relevant text, data, and visual elements of charts and then uses a chart-grounded text decoder to generate the expected output in natural language. We propose several chart-specific pretraining tasks that include: (i) low-level tasks to extract the visual elements (e.g., bars, lines) and data from charts, and (ii) high-level tasks to acquire chart understanding and reasoning skills. We find that pretraining the model on a large corpus with chart-specific low- and high-level tasks followed by finetuning on three down-streaming tasks results in state-of-the-art performance on three downstream tasks.
['Shafiq Joty', 'Enamul Hoque', 'Xuan Long Do', 'Parsa Kavehzadeh', 'Ahmed Masry']
2023-05-24
null
null
null
null
['chart-question-answering', 'chart-question-answering']
['computer-code', 'computer-vision']
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[11.226428985595703, 2.065953254699707]
2c132b4d-8714-4d06-b5db-3086af40ee81
dialogue-act-classification-in-group-chats
1908.01821
null
https://arxiv.org/abs/1908.01821v1
https://arxiv.org/pdf/1908.01821v1.pdf
Dialogue Act Classification in Group Chats with DAG-LSTMs
Dialogue act (DA) classification has been studied for the past two decades and has several key applications such as workflow automation and conversation analytics. Researchers have used, to address this problem, various traditional machine learning models, and more recently deep neural network models such as hierarchical convolutional neural networks (CNNs) and long short-term memory (LSTM) networks. In this paper, we introduce a new model architecture, directed-acyclic-graph LSTM (DAG-LSTM) for DA classification. A DAG-LSTM exploits the turn-taking structure naturally present in a multi-party conversation, and encodes this relation in its model structure. Using the STAC corpus, we show that the proposed method performs roughly 0.8% better in accuracy and 1.2% better in macro-F1 score when compared to existing methods. The proposed method is generic and not limited to conversation applications.
['Brendan Fahy', 'Mu-Hsin Wei', 'Ozan İrsoy', 'Haimin Zhang', 'Rakesh Gosangi', 'Peter Lund', 'Neophytos Nephytou', 'Duccio Pappadopulo', 'Camilo Ortiz']
2019-08-02
null
null
null
null
['dialogue-act-classification']
['natural-language-processing']
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[12.825575828552246, 7.767239570617676]
17a5a936-1afe-4ba3-ab81-e7274bdcf143
can-knowledge-graph-embeddings-tell-us-what
null
null
https://aclanthology.org/2020.insights-1.11
https://aclanthology.org/2020.insights-1.11.pdf
Can Knowledge Graph Embeddings Tell Us What Fact-checked Claims Are About?
The web offers a wealth of discourse data that help researchers from various fields analyze debates about current societal issues and gauge the effects on society of important phenomena such as misinformation spread. Such analyses often revolve around claims made by people about a given topic of interest. Fact-checking portals offer partially structured information that can assist such analysis. However, exploiting the network structure of such online discourse data is as of yet under-explored. We study the effectiveness of using neural-graph embedding features for claim topic prediction and their complementarity with text embeddings. We show that graph embeddings are modestly complementary with text embeddings, but the low performance of graph embedding features alone indicate that the model fails to capture topological features pertinent of the topic prediction task.
['Andon Tchechmedjiev', 'Konstantin Todorov', 'Luke Lo Seen', 'Katarina Boland', 'Sébastien Harispe', 'Valentina Beretta']
null
null
null
null
emnlp-insights-2020-11
['knowledge-graph-embeddings', 'knowledge-graph-embeddings']
['graphs', 'methodology']
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[8.706696510314941, 9.934659957885742]
25f66e4f-f98d-45e8-b914-37ccd9d528c6
leverage-financial-news-to-predict-stock
1506.07220
null
http://arxiv.org/abs/1506.07220v1
http://arxiv.org/pdf/1506.07220v1.pdf
Leverage Financial News to Predict Stock Price Movements Using Word Embeddings and Deep Neural Networks
Financial news contains useful information on public companies and the market. In this paper we apply the popular word embedding methods and deep neural networks to leverage financial news to predict stock price movements in the market. Experimental results have shown that our proposed methods are simple but very effective, which can significantly improve the stock prediction accuracy on a standard financial database over the baseline system using only the historical price information.
['Hui Jiang', 'Yangtuo Peng']
2015-06-24
leverage-financial-news-to-predict-stock-1
https://aclanthology.org/N16-1041
https://aclanthology.org/N16-1041.pdf
naacl-2016-6
['stock-prediction']
['time-series']
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[4.434328079223633, 4.252329349517822]
669befbb-efc7-4c24-915b-722d41fab3d1
exploiting-negative-learning-for-implicit
2106.12123
null
https://arxiv.org/abs/2106.12123v1
https://arxiv.org/pdf/2106.12123v1.pdf
Exploiting Negative Learning for Implicit Pseudo Label Rectification in Source-Free Domain Adaptive Semantic Segmentation
It is desirable to transfer the knowledge stored in a well-trained source model onto non-annotated target domain in the absence of source data. However, state-of-the-art methods for source free domain adaptation (SFDA) are subject to strict limits: 1) access to internal specifications of source models is a must; and 2) pseudo labels should be clean during self-training, making critical tasks relying on semantic segmentation unreliable. Aiming at these pitfalls, this study develops a domain adaptive solution to semantic segmentation with pseudo label rectification (namely \textit{PR-SFDA}), which operates in two phases: 1) \textit{Confidence-regularized unsupervised learning}: Maximum squares loss applies to regularize the target model to ensure the confidence in prediction; and 2) \textit{Noise-aware pseudo label learning}: Negative learning enables tolerance to noisy pseudo labels in training, meanwhile positive learning achieves fast convergence. Extensive experiments have been performed on domain adaptive semantic segmentation benchmark, \textit{GTA5 $\to$ Cityscapes}. Overall, \textit{PR-SFDA} achieves a performance of 49.0 mIoU, which is very close to that of the state-of-the-art counterparts. Note that the latter demand accesses to the source model's internal specifications, whereas the \textit{PR-SFDA} solution needs none as a sharp contrast.
['Xiaogang Jia', 'Yulin He', 'Chen Li', 'Yusong Tan', 'Wei Chen', 'Xin Luo']
2021-06-23
null
null
null
null
['source-free-domain-adaptation']
['computer-vision']
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[9.620694160461426, 1.3619030714035034]
d2a59b7f-7ca8-4f8d-989a-4f0edc84aacf
doremi-grounding-language-model-by-detecting
2307.00329
null
https://arxiv.org/abs/2307.00329v1
https://arxiv.org/pdf/2307.00329v1.pdf
DoReMi: Grounding Language Model by Detecting and Recovering from Plan-Execution Misalignment
Large language models encode a vast amount of semantic knowledge and possess remarkable understanding and reasoning capabilities. Previous research has explored how to ground language models in robotic tasks to ensure that the sequences generated by the language model are both logically correct and practically executable. However, low-level execution may deviate from the high-level plan due to environmental perturbations or imperfect controller design. In this paper, we propose DoReMi, a novel language model grounding framework that enables immediate Detection and Recovery from Misalignments between plan and execution. Specifically, during low-level skill execution, we use a vision question answering (VQA) model to regularly detect plan-execution misalignments. If certain misalignment occurs, our method will call the language model to re-plan in order to recover from misalignments. Experiments on various complex tasks including robot arms and humanoid robots demonstrate that our method can lead to higher task success rates and shorter task completion times. Videos of DoReMi are available at https://sites.google.com/view/doremi-paper.
['Jianyu Chen', 'Zheyuan Jiang', 'Lihan Zha', 'Yen-Jen Wang', 'Yanjiang Guo']
2023-07-01
null
null
null
null
['question-answering']
['natural-language-processing']
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[4.430872440338135, 0.8886126279830933]
9b28c874-9fcc-43f9-9ae9-6d8e62d67322
e-lmc-extended-linear-model-of
2203.00525
null
https://arxiv.org/abs/2203.00525v2
https://arxiv.org/pdf/2203.00525v2.pdf
E-LMC: Extended Linear Model of Coregionalization for Spatial Field Prediction
Physical simulations based on partial differential equations typically generate spatial fields results, which are utilized to calculate specific properties of a system for engineering design and optimization. Due to the intensive computational burden of the simulations, a surrogate model mapping the low-dimensional inputs to the spatial fields are commonly built based on a relatively small dataset. To resolve the challenge of predicting the whole spatial field, the popular linear model of coregionalization (LMC) can disentangle complicated correlations within the high-dimensional spatial field outputs and deliver accurate predictions. However, LMC fails if the spatial field cannot be well approximated by a linear combination of base functions with latent processes. In this paper, we present the Extended Linear Model of Coregionalization (E-LMC) by introducing an invertible neural network to linearize the highly complex and nonlinear spatial fields so that the LMC can easily generalize to nonlinear problems while preserving the traceability and scalability. Several real-world applications demonstrate that E-LMC can exploit spatial correlations effectively, showing a maximum improvement of about 40% over the original LMC and outperforming the other state-of-the-art spatial field models.
['Wei W. Xing', 'Yichen Meng', 'Xueying Zhang', 'Shihong Wang']
2022-03-01
null
null
null
null
['physical-simulations']
['miscellaneous']
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[6.6085100173950195, 3.403987407684326]
f558dada-8845-43c7-83fe-448ba8b78a09
listening-to-chaotic-whispers-a-deep-learning
1712.02136
null
http://arxiv.org/abs/1712.02136v3
http://arxiv.org/pdf/1712.02136v3.pdf
Listening to Chaotic Whispers: A Deep Learning Framework for News-oriented Stock Trend Prediction
Stock trend prediction plays a critical role in seeking maximized profit from stock investment. However, precise trend prediction is very difficult since the highly volatile and non-stationary nature of stock market. Exploding information on Internet together with advancing development of natural language processing and text mining techniques have enable investors to unveil market trends and volatility from online content. Unfortunately, the quality, trustworthiness and comprehensiveness of online content related to stock market varies drastically, and a large portion consists of the low-quality news, comments, or even rumors. To address this challenge, we imitate the learning process of human beings facing such chaotic online news, driven by three principles: sequential content dependency, diverse influence, and effective and efficient learning. In this paper, to capture the first two principles, we designed a Hybrid Attention Networks to predict the stock trend based on the sequence of recent related news. Moreover, we apply the self-paced learning mechanism to imitate the third principle. Extensive experiments on real-world stock market data demonstrate the effectiveness of our approach.
['Tie-Yan Liu', 'Weiqing Liu', 'Ziniu Hu', 'Xuanzhe Liu', 'Jiang Bian']
2017-12-06
null
null
null
null
['stock-trend-prediction']
['time-series']
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[4.411365985870361, 4.271608829498291]
60152d69-b4a7-4d93-8d59-a4fe5876776f
multimodal-fusion-with-deep-neural-networks
1907.03196
null
https://arxiv.org/abs/1907.03196v1
https://arxiv.org/pdf/1907.03196v1.pdf
Multimodal Fusion with Deep Neural Networks for Audio-Video Emotion Recognition
This paper presents a novel deep neural network (DNN) for multimodal fusion of audio, video and text modalities for emotion recognition. The proposed DNN architecture has independent and shared layers which aim to learn the representation for each modality, as well as the best combined representation to achieve the best prediction. Experimental results on the AVEC Sentiment Analysis in the Wild dataset indicate that the proposed DNN can achieve a higher level of Concordance Correlation Coefficient (CCC) than other state-of-the-art systems that perform early fusion of modalities at feature-level (i.e., concatenation) and late fusion at score-level (i.e., weighted average) fusion. The proposed DNN has achieved CCCs of 0.606, 0.534, and 0.170 on the development partition of the dataset for predicting arousal, valence and liking, respectively.
['Marco Pedersoli', 'Patrick Cardinal', 'Mohammed Senoussaoui', 'Juan D. S. Ortega', 'Eric Granger', 'Alessandro L. Koerich']
2019-07-06
null
null
null
null
['video-emotion-recognition']
['computer-vision']
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[13.327082633972168, 5.132423400878906]
c4cf9916-7d26-4b65-8239-1b50b532440a
mining-implicit-relevance-feedback-from-user
2006.07581
null
https://arxiv.org/abs/2006.07581v2
https://arxiv.org/pdf/2006.07581v2.pdf
Mining Implicit Relevance Feedback from User Behavior for Web Question Answering
Training and refreshing a web-scale Question Answering (QA) system for a multi-lingual commercial search engine often requires a huge amount of training examples. One principled idea is to mine implicit relevance feedback from user behavior recorded in search engine logs. All previous works on mining implicit relevance feedback target at relevance of web documents rather than passages. Due to several unique characteristics of QA tasks, the existing user behavior models for web documents cannot be applied to infer passage relevance. In this paper, we make the first study to explore the correlation between user behavior and passage relevance, and propose a novel approach for mining training data for Web QA. We conduct extensive experiments on four test datasets and the results show our approach significantly improves the accuracy of passage ranking without extra human labeled data. In practice, this work has proved effective to substantially reduce the human labeling cost for the QA service in a global commercial search engine, especially for languages with low resources. Our techniques have been deployed in multi-language services.
['Jian Pei', 'Feixiang Cheng', 'Ming Gong', 'Daxin Jiang', 'Shining Bo', 'Linjun Shou']
2020-06-13
null
null
null
null
['passage-ranking']
['natural-language-processing']
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[11.619684219360352, 7.950410842895508]
0ebb491e-f863-4d28-9ab2-bd2c1ba2eba7
heterogeneous-separation-consistency-training
2204.11032
null
https://arxiv.org/abs/2204.11032v3
https://arxiv.org/pdf/2204.11032v3.pdf
Heterogeneous Separation Consistency Training for Adaptation of Unsupervised Speech Separation
Recently, supervised speech separation has made great progress. However, limited by the nature of supervised training, most existing separation methods require ground-truth sources and are trained on synthetic datasets. This ground-truth reliance is problematic, because the ground-truth signals are usually unavailable in real conditions. Moreover, in many industry scenarios, the real acoustic characteristics deviate far from the ones in simulated datasets. Therefore, the performance usually degrades significantly when applying the supervised speech separation models to real applications. To address these problems, in this study, we propose a novel separation consistency training, termed SCT, to exploit the real-world unlabeled mixtures for improving cross-domain unsupervised speech separation in an iterative manner, by leveraging upon the complementary information obtained from heterogeneous (structurally distinct but behaviorally complementary) models. SCT follows a framework using two heterogeneous neural networks (HNNs) to produce high confidence pseudo labels of unlabeled real speech mixtures. These labels are then updated, and used to refine the HNNs to produce more reliable consistent separation results for real mixture pseudo-labeling. To maximally utilize the large complementary information between different separation networks, a cross-knowledge adaptation is further proposed. Together with simulated dataset, those real mixtures with high confidence pseudo labels are then used to update the HNN separation models iteratively. In addition, we find that combing the heterogeneous separation outputs by a simple linear fusion can further slightly improve the final system performance.
['Yanhua Long', 'Jiangyu Han']
2022-04-23
null
null
null
null
['speech-separation']
['speech']
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[14.790277481079102, 5.950778484344482]
c376d664-c191-473b-a9bc-46c5de17e891
take-a-prior-from-other-tasks-for-severe-blur
2302.06898
null
https://arxiv.org/abs/2302.06898v1
https://arxiv.org/pdf/2302.06898v1.pdf
Take a Prior from Other Tasks for Severe Blur Removal
Recovering clear structures from severely blurry inputs is a challenging problem due to the large movements between the camera and the scene. Although some works apply segmentation maps on human face images for deblurring, they cannot handle natural scenes because objects and degradation are more complex, and inaccurate segmentation maps lead to a loss of details. For general scene deblurring, the feature space of the blurry image and corresponding sharp image under the high-level vision task is closer, which inspires us to rely on other tasks (e.g. classification) to learn a comprehensive prior in severe blur removal cases. We propose a cross-level feature learning strategy based on knowledge distillation to learn the priors, which include global contexts and sharp local structures for recovering potential details. In addition, we propose a semantic prior embedding layer with multi-level aggregation and semantic attention transformation to integrate the priors effectively. We introduce the proposed priors to various models, including the UNet and other mainstream deblurring baselines, leading to better performance on severe blur removal. Extensive experiments on natural image deblurring benchmarks and real-world images, such as GoPro and RealBlur datasets, demonstrate our method's effectiveness and generalization ability.
['Yanning Zhang', 'Sung-Eui Yoon', 'Qingsen Yan', 'Jinqiu Sun', 'Yu Zhu', 'Danna Xue', 'Pei Wang']
2023-02-14
null
null
null
null
['deblurring']
['computer-vision']
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[11.524763107299805, -2.6930649280548096]
737ff9a9-4af0-4d94-ba81-5895fecb3c01
datasets-for-portuguese-legal-semantic
2306.00007
null
https://arxiv.org/abs/2306.00007v1
https://arxiv.org/pdf/2306.00007v1.pdf
Datasets for Portuguese Legal Semantic Textual Similarity: Comparing weak supervision and an annotation process approaches
The Brazilian judiciary has a large workload, resulting in a long time to finish legal proceedings. Brazilian National Council of Justice has established in Resolution 469/2022 formal guidance for document and process digitalization opening up the possibility of using automatic techniques to help with everyday tasks in the legal field, particularly in a large number of texts yielded on the routine of law procedures. Notably, Artificial Intelligence (AI) techniques allow for processing and extracting useful information from textual data, potentially speeding up the process. However, datasets from the legal domain required by several AI techniques are scarce and difficult to obtain as they need labels from experts. To address this challenge, this article contributes with four datasets from the legal domain, two with documents and metadata but unlabeled, and another two labeled with a heuristic aiming at its use in textual semantic similarity tasks. Also, to evaluate the effectiveness of the proposed heuristic label process, this article presents a small ground truth dataset generated from domain expert annotations. The analysis of ground truth labels highlights that semantic analysis of domain text can be challenging even for domain experts. Also, the comparison between ground truth and heuristic labels shows that heuristic labels are useful.
['Daniel de Oliveira', 'Aline Paes', 'Paulo Roberto dos S. Corval', 'Daniel da Silva Junior']
2023-05-29
null
null
null
null
['semantic-textual-similarity', 'semantic-similarity']
['natural-language-processing', 'natural-language-processing']
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[9.710095405578613, 9.19984245300293]
274a18ab-61fb-4888-9459-c3bc0f328ed9
pdnet-prior-model-guided-depth-enhanced
1803.08636
null
http://arxiv.org/abs/1803.08636v2
http://arxiv.org/pdf/1803.08636v2.pdf
PDNet: Prior-model Guided Depth-enhanced Network for Salient Object Detection
Fully convolutional neural networks (FCNs) have shown outstanding performance in many computer vision tasks including salient object detection. However, there still remains two issues needed to be addressed in deep learning based saliency detection. One is the lack of tremendous amount of annotated data to train a network. The other is the lack of robustness for extracting salient objects in images containing complex scenes. In this paper, we present a new architecture$ - $PDNet, a robust prior-model guided depth-enhanced network for RGB-D salient object detection. In contrast to existing works, in which RGB-D values of image pixels are fed directly to a network, the proposed architecture is composed of a master network for processing RGB values, and a sub-network making full use of depth cues and incorporate depth-based features into the master network. To overcome the limited size of the labeled RGB-D dataset for training, we employ a large conventional RGB dataset to pre-train the master network, which proves to contribute largely to the final accuracy. Extensive evaluations over five benchmark datasets demonstrate that our proposed method performs favorably against the state-of-the-art approaches.
['Thomas H. Li', 'Ge Li', 'Chunbiao Zhu', 'Xing Cai', 'Kan Huang']
2018-03-23
null
null
null
null
['rgb-d-salient-object-detection']
['computer-vision']
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[9.695270538330078, -0.7330524325370789]
eb5ec060-2f81-457c-b24f-24e871144f58
gpu-activity-prediction-using-representation
1703.09146
null
http://arxiv.org/abs/1703.09146v1
http://arxiv.org/pdf/1703.09146v1.pdf
GPU Activity Prediction using Representation Learning
GPU activity prediction is an important and complex problem. This is due to the high level of contention among thousands of parallel threads. This problem was mostly addressed using heuristics. We propose a representation learning approach to address this problem. We model any performance metric as a temporal function of the executed instructions with the intuition that the flow of instructions can be identified as distinct activities of the code. Our experiments show high accuracy and non-trivial predictive power of representation learning on a benchmark.
['Sek Chai', 'Mohamed Amer', 'David Zhang', 'Timothy Shields', 'Aswin Raghavan']
2017-03-27
null
null
null
null
['activity-prediction', 'activity-prediction']
['computer-vision', 'time-series']
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[7.551483631134033, 7.512197971343994]
13f1ee32-1856-45df-b516-550b30fbaa01
legendre-memory-units-continuous-time
null
null
http://papers.nips.cc/paper/9689-legendre-memory-units-continuous-time-representation-in-recurrent-neural-networks
http://papers.nips.cc/paper/9689-legendre-memory-units-continuous-time-representation-in-recurrent-neural-networks.pdf
Legendre Memory Units: Continuous-Time Representation in Recurrent Neural Networks
We propose a novel memory cell for recurrent neural networks that dynamically maintains information across long windows of time using relatively few resources. The Legendre Memory Unit~(LMU) is mathematically derived to orthogonalize its continuous-time history -- doing so by solving $d$ coupled ordinary differential equations~(ODEs), whose phase space linearly maps onto sliding windows of time via the Legendre polynomials up to degree $d - 1$. Backpropagation across LMUs outperforms equivalently-sized LSTMs on a chaotic time-series prediction task, improves memory capacity by two orders of magnitude, and significantly reduces training and inference times. LMUs can efficiently handle temporal dependencies spanning $100\text{,}000$ time-steps, converge rapidly, and use few internal state-variables to learn complex functions spanning long windows of time -- exceeding state-of-the-art performance among RNNs on permuted sequential MNIST. These results are due to the network's disposition to learn scale-invariant features independently of step size. Backpropagation through the ODE solver allows each layer to adapt its internal time-step, enabling the network to learn task-relevant time-scales. We demonstrate that LMU memory cells can be implemented using $m$ recurrently-connected Poisson spiking neurons, $\mathcal{O}( m )$ time and memory, with error scaling as $\mathcal{O}( d / \sqrt{m} )$. We discuss implementations of LMUs on analog and digital neuromorphic hardware.
['Ivana Kajić', 'Chris Eliasmith', 'Aaron Voelker']
2019-12-01
null
null
null
neurips-2019-12
['sequential-image-classification']
['computer-vision']
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[8.109709739685059, 2.6685543060302734]
e316463c-40b9-4498-ad40-74753edc644a
action-q-transformer-visual-explanation-in
2306.13879
null
https://arxiv.org/abs/2306.13879v1
https://arxiv.org/pdf/2306.13879v1.pdf
Action Q-Transformer: Visual Explanation in Deep Reinforcement Learning with Encoder-Decoder Model using Action Query
The excellent performance of Transformer in supervised learning has led to growing interest in its potential application to deep reinforcement learning (DRL) to achieve high performance on a wide variety of problems. However, the decision making of a DRL agent is a black box, which greatly hinders the application of the agent to real-world problems. To address this problem, we propose the Action Q-Transformer (AQT), which introduces a transformer encoder-decoder structure to Q-learning based DRL methods. In AQT, the encoder calculates the state value function and the decoder calculates the advantage function to promote the acquisition of different attentions indicating the agent's decision-making. The decoder in AQT utilizes action queries, which represent the information of each action, as queries. This enables us to obtain the attentions for the state value and for each action. By acquiring and visualizing these attentions that detail the agent's decision-making, we achieve a DRL model with high interpretability. In this paper, we show that visualization of attention in Atari 2600 games enables detailed analysis of agents' decision-making in various game tasks. Further, experimental results demonstrate that our method can achieve higher performance than the baseline in some games.
['Komei Sugiura', 'Hironobu Fujiyoshi', 'Takayoshi Yamashita', 'Tsubasa Hirakawa', 'Hidenori Itaya']
2023-06-24
null
null
null
null
['q-learning', 'atari-games', 'decision-making']
['methodology', 'playing-games', 'reasoning']
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[3.9414782524108887, 1.6065796613693237]
88123ee2-e244-4f28-a7d6-2a657dcaac62
does-generative-face-completion-help-face
1906.02858
null
https://arxiv.org/abs/1906.02858v1
https://arxiv.org/pdf/1906.02858v1.pdf
Does Generative Face Completion Help Face Recognition?
Face occlusions, covering either the majority or discriminative parts of the face, can break facial perception and produce a drastic loss of information. Biometric systems such as recent deep face recognition models are not immune to obstructions or other objects covering parts of the face. While most of the current face recognition methods are not optimized to handle occlusions, there have been a few attempts to improve robustness directly in the training stage. Unlike those, we propose to study the effect of generative face completion on the recognition. We offer a face completion encoder-decoder, based on a convolutional operator with a gating mechanism, trained with an ample set of face occlusions. To systematically evaluate the impact of realistic occlusions on recognition, we propose to play the occlusion game: we render 3D objects onto different face parts, providing precious knowledge of what the impact is of effectively removing those occlusions. Extensive experiments on the Labeled Faces in the Wild (LFW), and its more difficult variant LFW-BLUFR, testify that face completion is able to partially restore face perception in machine vision systems for improved recognition.
['Wael Abd-Almageed', 'Joe Mathai', 'Iacopo Masi']
2019-06-07
null
null
null
null
['facial-inpainting']
['computer-vision']
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[13.070182800292969, 0.3230769634246826]
5d3352e5-1a8d-4a7b-a847-9951c7334663
discrete-optimization-for-unsupervised
2005.01791
null
https://arxiv.org/abs/2005.01791v1
https://arxiv.org/pdf/2005.01791v1.pdf
Discrete Optimization for Unsupervised Sentence Summarization with Word-Level Extraction
Automatic sentence summarization produces a shorter version of a sentence, while preserving its most important information. A good summary is characterized by language fluency and high information overlap with the source sentence. We model these two aspects in an unsupervised objective function, consisting of language modeling and semantic similarity metrics. We search for a high-scoring summary by discrete optimization. Our proposed method achieves a new state-of-the art for unsupervised sentence summarization according to ROUGE scores. Additionally, we demonstrate that the commonly reported ROUGE F1 metric is sensitive to summary length. Since this is unwillingly exploited in recent work, we emphasize that future evaluation should explicitly group summarization systems by output length brackets.
['Yao Lu', 'Lili Mou', 'Olga Vechtomova', 'Katja Markert', 'Raphael Schumann']
2020-05-04
discrete-optimization-for-unsupervised-1
https://aclanthology.org/2020.acl-main.452
https://aclanthology.org/2020.acl-main.452.pdf
acl-2020-6
['abstractive-sentence-summarization', 'unsupervised-sentence-summarization']
['natural-language-processing', 'natural-language-processing']
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[12.467926979064941, 9.500500679016113]
29b86639-641d-458b-84a1-95a3fe9d87f9
contrastive-learning-and-self-training-for
2105.02001
null
https://arxiv.org/abs/2105.02001v1
https://arxiv.org/pdf/2105.02001v1.pdf
Contrastive Learning and Self-Training for Unsupervised Domain Adaptation in Semantic Segmentation
Deep convolutional neural networks have considerably improved state-of-the-art results for semantic segmentation. Nevertheless, even modern architectures lack the ability to generalize well to a test dataset that originates from a different domain. To avoid the costly annotation of training data for unseen domains, unsupervised domain adaptation (UDA) attempts to provide efficient knowledge transfer from a labeled source domain to an unlabeled target domain. Previous work has mainly focused on minimizing the discrepancy between the two domains by using adversarial training or self-training. While adversarial training may fail to align the correct semantic categories as it minimizes the discrepancy between the global distributions, self-training raises the question of how to provide reliable pseudo-labels. To align the correct semantic categories across domains, we propose a contrastive learning approach that adapts category-wise centroids across domains. Furthermore, we extend our method with self-training, where we use a memory-efficient temporal ensemble to generate consistent and reliable pseudo-labels. Although both contrastive learning and self-training (CLST) through temporal ensembling enable knowledge transfer between two domains, it is their combination that leads to a symbiotic structure. We validate our approach on two domain adaptation benchmarks: GTA5 $\rightarrow$ Cityscapes and SYNTHIA $\rightarrow$ Cityscapes. Our method achieves better or comparable results than the state-of-the-art. We will make the code publicly available.
['Bin Yang', 'Mario Döbler', 'Alexander Bartler', 'Robert A. Marsden']
2021-05-05
null
null
null
null
['synthetic-to-real-translation']
['computer-vision']
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[9.717194557189941, 1.4654121398925781]
c513074a-f181-4d02-9a3a-9451c4abfa2c
enhancing-embedding-representations-of
2303.13566
null
https://arxiv.org/abs/2303.13566v1
https://arxiv.org/pdf/2303.13566v1.pdf
Enhancing Embedding Representations of Biomedical Data using Logic Knowledge
Knowledge Graph Embeddings (KGE) have become a quite popular class of models specifically devised to deal with ontologies and graph structure data, as they can implicitly encode statistical dependencies between entities and relations in a latent space. KGE techniques are particularly effective for the biomedical domain, where it is quite common to deal with large knowledge graphs underlying complex interactions between biological and chemical objects. Recently in the literature, the PharmKG dataset has been proposed as one of the most challenging knowledge graph biomedical benchmark, with hundreds of thousands of relational facts between genes, diseases and chemicals. Despite KGEs can scale to very large relational domains, they generally fail at representing more complex relational dependencies between facts, like logic rules, which may be fundamental in complex experimental settings. In this paper, we exploit logic rules to enhance the embedding representations of KGEs on the PharmKG dataset. To this end, we adopt Relational Reasoning Network (R2N), a recently proposed neural-symbolic approach showing promising results on knowledge graph completion tasks. An R2N uses the available logic rules to build a neural architecture that reasons over KGE latent representations. In the experiments, we show that our approach is able to significantly improve the current state-of-the-art on the PharmKG dataset. Finally, we provide an ablation study to experimentally compare the effect of alternative sets of rules according to different selection criteria and varying the number of considered rules.
['Giuseppe Marra', 'Moreno Falaschi', 'Caterina Graziani', 'Stefano Fioravanti', 'Francesco Giannini', 'Michelangelo Diligenti']
2023-03-23
null
null
null
null
['knowledge-graph-embeddings', 'knowledge-graph-completion', 'knowledge-graph-embeddings', 'relational-reasoning']
['graphs', 'knowledge-base', 'methodology', 'natural-language-processing']
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[8.646493911743164, 7.738701820373535]
8f303948-13bb-4773-9b20-d0a260937d0e
dosed-a-deep-learning-approach-to-detect
1812.04079
null
http://arxiv.org/abs/1812.04079v1
http://arxiv.org/pdf/1812.04079v1.pdf
DOSED: a deep learning approach to detect multiple sleep micro-events in EEG signal
Background: Electroencephalography (EEG) monitors brain activity during sleep and is used to identify sleep disorders. In sleep medicine, clinicians interpret raw EEG signals in so-called sleep stages, which are assigned by experts to every 30s window of signal. For diagnosis, they also rely on shorter prototypical micro-architecture events which exhibit variable durations and shapes, such as spindles, K-complexes or arousals. Annotating such events is traditionally performed by a trained sleep expert, making the process time consuming, tedious and subject to inter-scorer variability. To automate this procedure, various methods have been developed, yet these are event-specific and rely on the extraction of hand-crafted features. New method: We propose a novel deep learning architecure called Dreem One Shot Event Detector (DOSED). DOSED jointly predicts locations, durations and types of events in EEG time series. The proposed approach, applied here on sleep related micro-architecture events, is inspired by object detectors developed for computer vision such as YOLO and SSD. It relies on a convolutional neural network that builds a feature representation from raw EEG signals, as well as two modules performing localization and classification respectively. Results and comparison with other methods: The proposed approach is tested on 4 datasets and 3 types of events (spindles, K-complexes, arousals) and compared to the current state-of-the-art detection algorithms. Conclusions: Results demonstrate the versatility of this new approach and improved performance compared to the current state-of-the-art detection methods.
['Alexandre Gramfort', 'Stanislas Chambon', 'Pierrick J. Arnal', 'Emmanuel Mignot', 'Valentin Thorey']
2018-12-07
null
null
null
null
['sleep-quality-prediction', 'k-complex-detection', 'spindle-detection', 'sleep-apnea-detection', 'sleep-micro-event-detection', 'sleep-arousal-detection']
['medical', 'medical', 'medical', 'medical', 'medical', 'medical']
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