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a7c93832-1460-4f43-a4d2-e0f50538ebcc
dip-differentiable-interreflection-aware
2212.04705
null
https://arxiv.org/abs/2212.04705v1
https://arxiv.org/pdf/2212.04705v1.pdf
DIP: Differentiable Interreflection-aware Physics-based Inverse Rendering
We present a physics-based inverse rendering method that learns the illumination, geometry, and materials of a scene from posed multi-view RGB images. To model the illumination of a scene, existing inverse rendering works either completely ignore the indirect illumination or model it by coarse approximations, leading to sub-optimal illumination, geometry, and material prediction of the scene. In this work, we propose a physics-based illumination model that explicitly traces the incoming indirect lights at each surface point based on interreflection, followed by estimating each identified indirect light through an efficient neural network. Furthermore, we utilize the Leibniz's integral rule to resolve non-differentiability in the proposed illumination model caused by one type of environment light -- the tangent lights. As a result, the proposed interreflection-aware illumination model can be learned end-to-end together with geometry and materials estimation. As a side product, our physics-based inverse rendering model also facilitates flexible and realistic material editing as well as relighting. Extensive experiments on both synthetic and real-world datasets demonstrate that the proposed method performs favorably against existing inverse rendering methods on novel view synthesis and inverse rendering.
['Ming-Hsuan Yang', 'Sifei Liu', 'Xueting Li', 'Youming Deng']
2022-12-09
null
null
null
null
['inverse-rendering']
['computer-vision']
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[9.69948959350586, -3.0710480213165283]
bfaefe29-f4fe-4527-97e7-6a8771201be0
recallm-an-architecture-for-temporal-context
2307.02738
null
https://arxiv.org/abs/2307.02738v2
https://arxiv.org/pdf/2307.02738v2.pdf
RecallM: An Architecture for Temporal Context Understanding and Question Answering
The ideal long-term memory mechanism for Large Language Model (LLM) based chatbots, would lay the foundation for continual learning, complex reasoning and allow sequential and temporal dependencies to be learnt. Creating this type of memory mechanism is an extremely challenging problem. In this paper we explore different methods of achieving the effect of long-term memory. We propose a new architecture focused on creating adaptable and updatable long-term memory for AGI systems. We demonstrate through various experiments the benefits of the RecallM architecture, particularly the improved temporal understanding of knowledge it provides.
['Hugo Latapie', 'Brandon Kynoch']
2023-07-06
null
null
null
null
['continual-learning', 'question-answering']
['methodology', 'natural-language-processing']
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[12.5944242477417, 7.869400501251221]
fbd1c6e7-67ef-475c-9351-661760284694
beyond-human-parts-dual-part-aligned
1910.10111
null
https://arxiv.org/abs/1910.10111v1
https://arxiv.org/pdf/1910.10111v1.pdf
Beyond Human Parts: Dual Part-Aligned Representations for Person Re-Identification
Person re-identification is a challenging task due to various complex factors. Recent studies have attempted to integrate human parsing results or externally defined attributes to help capture human parts or important object regions. On the other hand, there still exist many useful contextual cues that do not fall into the scope of predefined human parts or attributes. In this paper, we address the missed contextual cues by exploiting both the accurate human parts and the coarse non-human parts. In our implementation, we apply a human parsing model to extract the binary human part masks \emph{and} a self-attention mechanism to capture the soft latent (non-human) part masks. We verify the effectiveness of our approach with new state-of-the-art performances on three challenging benchmarks: Market-1501, DukeMTMC-reID and CUHK03. Our implementation is available at https://github.com/ggjy/P2Net.pytorch.
['Jinge Yao', 'Yuhui Yuan', 'Kai Han', 'Lang Huang', 'Jianyuan Guo', 'Chao Zhang']
2019-10-22
beyond-human-parts-dual-part-aligned-1
http://openaccess.thecvf.com/content_ICCV_2019/html/Guo_Beyond_Human_Parts_Dual_Part-Aligned_Representations_for_Person_Re-Identification_ICCV_2019_paper.html
http://openaccess.thecvf.com/content_ICCV_2019/papers/Guo_Beyond_Human_Parts_Dual_Part-Aligned_Representations_for_Person_Re-Identification_ICCV_2019_paper.pdf
iccv-2019-10
['human-parsing']
['computer-vision']
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[14.712675094604492, 0.8450649380683899]
27139a42-4ac7-439f-8c31-ed43115ab08d
phase-only-image-based-kernel-estimation-for
1811.10185
null
http://arxiv.org/abs/1811.10185v3
http://arxiv.org/pdf/1811.10185v3.pdf
Phase-only Image Based Kernel Estimation for Single-image Blind Deblurring
The image blurring process is generally modelled as the convolution of a blur kernel with a latent image. Therefore, the estimation of the blur kernel is essentially important for blind image deblurring. Unlike existing approaches which focus on approaching the problem by enforcing various priors on the blur kernel and the latent image, we are aiming at obtaining a high quality blur kernel directly by studying the problem in the frequency domain. We show that the auto-correlation of the absolute phase-only image can provide faithful information about the motion (e.g. the motion direction and magnitude, we call it the motion pattern in this paper.) that caused the blur, leading to a new and efficient blur kernel estimation approach. The blur kernel is then refined and the sharp image is estimated by solving an optimization problem by enforcing a regularization on the blur kernel and the latent image. We further extend our approach to handle non-uniform blur, which involves spatially varying blur kernels. Our approach is evaluated extensively on synthetic and real data and shows good results compared to the state-of-the-art deblurring approaches.
['Miaomiao Liu', 'Richard Hartley', 'Liyuan Pan', 'Yuchao Dai']
2018-11-26
null
null
null
null
['single-image-blind-deblurring', 'blind-image-deblurring']
['computer-vision', 'computer-vision']
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[11.616364479064941, -2.7486751079559326]
eca5fc9b-e6bd-410f-968b-d7a748f9647a
graph-neural-networks-for-molecules
2209.05582
null
https://arxiv.org/abs/2209.05582v2
https://arxiv.org/pdf/2209.05582v2.pdf
Graph Neural Networks for Molecules
Graph neural networks (GNNs), which are capable of learning representations from graphical data, are naturally suitable for modeling molecular systems. This review introduces GNNs and their various applications for small organic molecules. GNNs rely on message-passing operations, a generic yet powerful framework, to update node features iteratively. Many researches design GNN architectures to effectively learn topological information of 2D molecule graphs as well as geometric information of 3D molecular systems. GNNs have been implemented in a wide variety of molecular applications, including molecular property prediction, molecular scoring and docking, molecular optimization and de novo generation, molecular dynamics simulation, etc. Besides, the review also summarizes the recent development of self-supervised learning for molecules with GNNs.
['Amir Barati Farimani', 'Zijie Li', 'Yuyang Wang']
2022-09-12
null
null
null
null
['molecular-property-prediction']
['miscellaneous']
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[5.158682823181152, 5.819759368896484]
39f00452-c522-49f1-8b7c-ec6d14da2faf
short-term-and-long-term-context-aggregation-1
2009.05721
null
https://arxiv.org/abs/2009.05721v1
https://arxiv.org/pdf/2009.05721v1.pdf
Short-Term and Long-Term Context Aggregation Network for Video Inpainting
Video inpainting aims to restore missing regions of a video and has many applications such as video editing and object removal. However, existing methods either suffer from inaccurate short-term context aggregation or rarely explore long-term frame information. In this work, we present a novel context aggregation network to effectively exploit both short-term and long-term frame information for video inpainting. In the encoding stage, we propose boundary-aware short-term context aggregation, which aligns and aggregates, from neighbor frames, local regions that are closely related to the boundary context of missing regions into the target frame. Furthermore, we propose dynamic long-term context aggregation to globally refine the feature map generated in the encoding stage using long-term frame features, which are dynamically updated throughout the inpainting process. Experiments show that it outperforms state-of-the-art methods with better inpainting results and fast inpainting speed.
['DaCheng Tao', 'Mingming Gong', 'Ang Li', 'Ramamohanarao Kotagiri', 'Rui Zhang', 'Jianzhong Qi', 'Xingjun Ma', 'Shanshan Zhao']
2020-09-12
short-term-and-long-term-context-aggregation
https://www.ecva.net/papers/eccv_2020/papers_ECCV/html/2723_ECCV_2020_paper.php
https://www.ecva.net/papers/eccv_2020/papers_ECCV/papers/123490698.pdf
eccv-2020-8
['video-inpainting']
['computer-vision']
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[10.815571784973145, -1.3959252834320068]
0918ce95-0fa2-42f3-a0b5-a9b4f8be85bb
broaden-your-views-for-self-supervised-video
2103.16559
null
https://arxiv.org/abs/2103.16559v3
https://arxiv.org/pdf/2103.16559v3.pdf
Broaden Your Views for Self-Supervised Video Learning
Most successful self-supervised learning methods are trained to align the representations of two independent views from the data. State-of-the-art methods in video are inspired by image techniques, where these two views are similarly extracted by cropping and augmenting the resulting crop. However, these methods miss a crucial element in the video domain: time. We introduce BraVe, a self-supervised learning framework for video. In BraVe, one of the views has access to a narrow temporal window of the video while the other view has a broad access to the video content. Our models learn to generalise from the narrow view to the general content of the video. Furthermore, BraVe processes the views with different backbones, enabling the use of alternative augmentations or modalities into the broad view such as optical flow, randomly convolved RGB frames, audio or their combinations. We demonstrate that BraVe achieves state-of-the-art results in self-supervised representation learning on standard video and audio classification benchmarks including UCF101, HMDB51, Kinetics, ESC-50 and AudioSet.
['Corentin Tallec', 'Florian Strub', 'Ross Hemsley', 'Andrew Zisserman', 'Aäron van den Oord', 'Jean-bastien Grill', 'Michal Valko', 'Florent Altché', 'Viorica Patraucean', 'Mateusz Malinowski', 'Luyu Wang', 'Jean-Baptiste Alayrac', 'Pauline Luc', 'Adrià Recasens']
2021-03-30
null
http://openaccess.thecvf.com//content/ICCV2021/html/Recasens_Broaden_Your_Views_for_Self-Supervised_Video_Learning_ICCV_2021_paper.html
http://openaccess.thecvf.com//content/ICCV2021/papers/Recasens_Broaden_Your_Views_for_Self-Supervised_Video_Learning_ICCV_2021_paper.pdf
iccv-2021-1
['self-supervised-action-recognition']
['computer-vision']
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[9.322710990905762, 0.8865151405334473]
29f32eb7-f100-4f9f-90d4-01712305292c
towards-linked-hypernyms-dataset-20
null
null
https://aclanthology.org/L14-1552
https://aclanthology.org/L14-1552.pdf
Towards Linked Hypernyms Dataset 2.0: complementing DBpedia with hypernym discovery
This paper presents a statistical type inference algorithm for ontology alignment, which assigns DBpedia entities with a new type (class). To infer types for a specific entity, the algorithm first identifies types that co-occur with the type the entity already has, and subsequently prunes the set of candidates for the most confident one. The algorithm has one parameter for balancing specificity/reliability of the resulting type selection. The proposed algorithm is used to complement the types in the LHD dataset, which is RDF knowledge base populated by identifying hypernyms from the free text of Wikipedia articles. The majority of types assigned to entities in LHD 1.0 are DBpedia resources. Through the statistical type inference, the number of entities with a type from DBpedia Ontology is increased significantly: by 750 thousand entities for the English dataset, 200.000 for Dutch and 440.000 for German. The accuracy of the inferred types is at 0.65 for English (as compared to 0.86 for LHD 1.0 types). A byproduct of the mapping process is a set of 11.000 mappings from DBpedia resources to DBpedia Ontology classes with associated confidence values. The number of the resulting mappings is an order of magnitude larger than what can be achieved with standard ontology alignment algorithms (Falcon, LogMapLt and YAM++), which do not utilize the type co-occurrence information. The presented algorithm is not restricted to the LHD dataset, it can be used to address generic type inference problems in presence of class membership information for a large number of instances.
['Ond{\\v{r}}ej Zamazal', "Tom{\\'a}{\\v{s}} Kliegr"]
2014-05-01
null
null
null
lrec-2014-5
['hypernym-discovery']
['natural-language-processing']
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[9.211627006530762, 8.086844444274902]
482b895e-0b9a-4407-817d-0231d9056041
black-box-node-injection-attack-for-graph
2202.09389
null
https://arxiv.org/abs/2202.09389v1
https://arxiv.org/pdf/2202.09389v1.pdf
Black-box Node Injection Attack for Graph Neural Networks
Graph Neural Networks (GNNs) have drawn significant attentions over the years and been broadly applied to vital fields that require high security standard such as product recommendation and traffic forecasting. Under such scenarios, exploiting GNN's vulnerabilities and further downgrade its classification performance become highly incentive for adversaries. Previous attackers mainly focus on structural perturbations of existing graphs. Although they deliver promising results, the actual implementation needs capability of manipulating the graph connectivity, which is impractical in some circumstances. In this work, we study the possibility of injecting nodes to evade the victim GNN model, and unlike previous related works with white-box setting, we significantly restrict the amount of accessible knowledge and explore the black-box setting. Specifically, we model the node injection attack as a Markov decision process and propose GA2C, a graph reinforcement learning framework in the fashion of advantage actor critic, to generate realistic features for injected nodes and seamlessly merge them into the original graph following the same topology characteristics. Through our extensive experiments on multiple acknowledged benchmark datasets, we demonstrate the superior performance of our proposed GA2C over existing state-of-the-art methods. The data and source code are publicly accessible at: https://github.com/jumxglhf/GA2C.
['Liang Zhao', 'Yanfang Ye', 'Yujie Fan', 'Mingxuan Ju']
2022-02-18
null
null
null
null
['product-recommendation']
['miscellaneous']
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[6.102791786193848, 7.328357219696045]
8ade0c9c-bdb8-4cdd-8256-fa659a78a1d4
a-novel-deep-learning-based-approach-for
2208.03408
null
https://arxiv.org/abs/2208.03408v2
https://arxiv.org/pdf/2208.03408v2.pdf
A novel deep learning-based approach for sleep apnea detection using single-lead ECG signals
Sleep apnea (SA) is a type of sleep disorder characterized by snoring and chronic sleeplessness, which can lead to serious conditions such as high blood pressure, heart failure, and cardiomyopathy (enlargement of the muscle tissue of the heart). The electrocardiogram (ECG) plays a critical role in identifying SA since it might reveal abnormal cardiac activity. Recent research on ECG-based SA detection has focused on feature engineering techniques that extract specific characteristics from multiple-lead ECG signals and use them as classification model inputs. In this study, a novel method of feature extraction based on the detection of S peaks is proposed to enhance the detection of adjacent SA segments using a single-lead ECG. In particular, ECG features collected from a single lead (V2) are used to identify SA episodes. On the extracted features, a CNN model is trained to detect SA. Experimental results demonstrate that the proposed method detects SA from single-lead ECG data is more accurate than existing state-of-the-art methods, with 91.13% classification accuracy, 92.58% sensitivity, and 88.75% specificity. Moreover, the further usage of features associated with the S peaks enhances the classification accuracy by 0.85%. Our findings indicate that the proposed machine learning system has the potential to be an effective method for detecting SA episodes.
['Cuong Do', 'Huy-Hieu Pham', 'Huy-Khiem Le', 'Thao Nguyen', 'Anh-Tu Nguyen']
2022-08-05
null
null
null
null
['sleep-apnea-detection']
['medical']
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[14.085192680358887, 3.2255005836486816]
6fc655d6-48c4-4c79-bed4-e9075e7e1a20
winning-the-lottery-with-continuous-1
1912.04427
null
https://arxiv.org/abs/1912.04427v4
https://arxiv.org/pdf/1912.04427v4.pdf
Winning the Lottery with Continuous Sparsification
The search for efficient, sparse deep neural network models is most prominently performed by pruning: training a dense, overparameterized network and removing parameters, usually via following a manually-crafted heuristic. Additionally, the recent Lottery Ticket Hypothesis conjectures that, for a typically-sized neural network, it is possible to find small sub-networks which, when trained from scratch on a comparable budget, match the performance of the original dense counterpart. We revisit fundamental aspects of pruning algorithms, pointing out missing ingredients in previous approaches, and develop a method, Continuous Sparsification, which searches for sparse networks based on a novel approximation of an intractable $\ell_0$ regularization. We compare against dominant heuristic-based methods on pruning as well as ticket search -- finding sparse subnetworks that can be successfully re-trained from an early iterate. Empirical results show that we surpass the state-of-the-art for both objectives, across models and datasets, including VGG trained on CIFAR-10 and ResNet-50 trained on ImageNet. In addition to setting a new standard for pruning, Continuous Sparsification also offers fast parallel ticket search, opening doors to new applications of the Lottery Ticket Hypothesis.
['Pedro Savarese', 'Michael Maire', 'Hugo Silva']
2019-12-10
null
http://proceedings.neurips.cc/paper/2020/hash/83004190b1793d7aa15f8d0d49a13eba-Abstract.html
http://proceedings.neurips.cc/paper/2020/file/83004190b1793d7aa15f8d0d49a13eba-Paper.pdf
neurips-2020-12
['ticket-search']
['methodology']
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[8.547319412231445, 3.3171210289001465]
6cf09fe1-29ac-47ec-b83e-60931c17ab31
190408338
1904.08338
null
http://arxiv.org/abs/1904.08338v1
http://arxiv.org/pdf/1904.08338v1.pdf
OCKELM+: Kernel Extreme Learning Machine based One-class Classification using Privileged Information (or KOC+: Kernel Ridge Regression or Least Square SVM with zero bias based One-class Classification using Privileged Information)
Kernel method-based one-class classifier is mainly used for outlier or novelty detection. In this letter, kernel ridge regression (KRR) based one-class classifier (KOC) has been extended for learning using privileged information (LUPI). LUPI-based KOC method is referred to as KOC+. This privileged information is available as a feature with the dataset but only for training (not for testing). KOC+ utilizes the privileged information differently compared to normal feature information by using a so-called correction function. Privileged information helps KOC+ in achieving better generalization performance which is exhibited in this letter by testing the classifiers with and without privileged information. Existing and proposed classifiers are evaluated on the datasets from UCI machine learning repository and also on MNIST dataset. Moreover, experimental results evince the advantage of KOC+ over KOC and support vector machine (SVM) based one-class classifiers.
['Chandan Gautam', 'M. Tanveer', 'Aruna Tiwari']
2019-04-13
null
null
null
null
['one-class-classifier']
['methodology']
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[8.189534187316895, 3.883599281311035]
1310afd8-ced7-4b0f-8cb1-0e151f1fd885
bidirectional-copy-paste-for-semi-supervised
2305.00673
null
https://arxiv.org/abs/2305.00673v1
https://arxiv.org/pdf/2305.00673v1.pdf
Bidirectional Copy-Paste for Semi-Supervised Medical Image Segmentation
In semi-supervised medical image segmentation, there exist empirical mismatch problems between labeled and unlabeled data distribution. The knowledge learned from the labeled data may be largely discarded if treating labeled and unlabeled data separately or in an inconsistent manner. We propose a straightforward method for alleviating the problem - copy-pasting labeled and unlabeled data bidirectionally, in a simple Mean Teacher architecture. The method encourages unlabeled data to learn comprehensive common semantics from the labeled data in both inward and outward directions. More importantly, the consistent learning procedure for labeled and unlabeled data can largely reduce the empirical distribution gap. In detail, we copy-paste a random crop from a labeled image (foreground) onto an unlabeled image (background) and an unlabeled image (foreground) onto a labeled image (background), respectively. The two mixed images are fed into a Student network and supervised by the mixed supervisory signals of pseudo-labels and ground-truth. We reveal that the simple mechanism of copy-pasting bidirectionally between labeled and unlabeled data is good enough and the experiments show solid gains (e.g., over 21% Dice improvement on ACDC dataset with 5% labeled data) compared with other state-of-the-arts on various semi-supervised medical image segmentation datasets. Code is available at https://github.com/DeepMed-Lab-ECNU/BCP}.
['Yan Wang', 'Wei Shen', 'Qingli Li', 'Duowen Chen', 'Yunhao Bai']
2023-05-01
null
http://openaccess.thecvf.com//content/CVPR2023/html/Bai_Bidirectional_Copy-Paste_for_Semi-Supervised_Medical_Image_Segmentation_CVPR_2023_paper.html
http://openaccess.thecvf.com//content/CVPR2023/papers/Bai_Bidirectional_Copy-Paste_for_Semi-Supervised_Medical_Image_Segmentation_CVPR_2023_paper.pdf
cvpr-2023-1
['semi-supervised-medical-image-segmentation']
['computer-vision']
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[14.62393569946289, -1.9951493740081787]
14679da2-3931-4755-a064-d92eb988f48b
an-efficient-multilinear-optimization
1511.02667
null
http://arxiv.org/abs/1511.02667v2
http://arxiv.org/pdf/1511.02667v2.pdf
An Efficient Multilinear Optimization Framework for Hypergraph Matching
Hypergraph matching has recently become a popular approach for solving correspondence problems in computer vision as it allows to integrate higher-order geometric information. Hypergraph matching can be formulated as a third-order optimization problem subject to the assignment constraints which turns out to be NP-hard. In recent work, we have proposed an algorithm for hypergraph matching which first lifts the third-order problem to a fourth-order problem and then solves the fourth-order problem via optimization of the corresponding multilinear form. This leads to a tensor block coordinate ascent scheme which has the guarantee of providing monotonic ascent in the original matching score function and leads to state-of-the-art performance both in terms of achieved matching score and accuracy. In this paper we show that the lifting step to a fourth-order problem can be avoided yielding a third-order scheme with the same guarantees and performance but being two times faster. Moreover, we introduce a homotopy type method which further improves the performance.
['Francesco Tudisco', 'Antoine Gautier', 'Quynh Nguyen', 'Matthias Hein']
2015-11-09
null
null
null
null
['hypergraph-matching']
['graphs']
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[8.099360466003418, -2.190068244934082]
9190ab08-8b27-43e9-86d6-2d5de9f9ab4a
improving-object-counting-with-heatmap
1803.05494
null
http://arxiv.org/abs/1803.05494v2
http://arxiv.org/pdf/1803.05494v2.pdf
Improving Object Counting with Heatmap Regulation
In this paper, we propose a simple and effective way to improve one-look regression models for object counting from images. We use class activation map visualizations to illustrate the drawbacks of learning a pure one-look regression model for a counting task. Based on these insights, we enhance one-look regression counting models by regulating activation maps from the final convolution layer of the network with coarse ground-truth activation maps generated from simple dot annotations. We call this strategy heatmap regulation (HR). We show that this simple enhancement effectively suppresses false detections generated by the corresponding one-look baseline model and also improves the performance in terms of false negatives. Evaluations are performed on four different counting datasets --- two for car counting (CARPK, PUCPR+), one for crowd counting (WorldExpo) and another for biological cell counting (VGG-Cells). Adding HR to a simple VGG front-end improves performance on all these benchmarks compared to a simple one-look baseline model and results in state-of-the-art performance for car counting.
['Ian Stavness', 'Shubhra Aich']
2018-03-14
null
null
null
null
['object-counting']
['computer-vision']
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[8.713135719299316, 0.006962099578231573]
3f7936fa-2bb4-490d-bb29-1772cec28da0
incorporating-linguistic-constraints-into
null
null
https://aclanthology.org/P19-1515
https://aclanthology.org/P19-1515.pdf
Incorporating Linguistic Constraints into Keyphrase Generation
Keyphrases, that concisely describe the high-level topics discussed in a document, are very useful for a wide range of natural language processing tasks. Though existing keyphrase generation methods have achieved remarkable performance on this task, they generate many overlapping phrases (including sub-phrases or super-phrases) of keyphrases. In this paper, we propose the parallel Seq2Seq network with the coverage attention to alleviate the overlapping phrase problem. Specifically, we integrate the linguistic constraints of keyphrase into the basic Seq2Seq network on the source side, and employ the multi-task learning framework on the target side. In addition, in order to prevent from generating overlapping phrases of keyphrases with correct syntax, we introduce the coverage vector to keep track of the attention history and to decide whether the parts of source text have been covered by existing generated keyphrases. Experimental results show that our method can outperform the state-of-the-art CopyRNN on scientific datasets, and is also more effective in news domain.
['Yuxiang Zhang', 'Jing Zhao']
2019-07-01
null
null
null
acl-2019-7
['keyphrase-generation']
['natural-language-processing']
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[12.323901176452637, 9.02120590209961]
00256ce1-0d6a-4062-a96d-bd7f7db42bc1
maniskill2-a-unified-benchmark-for
2302.04659
null
https://arxiv.org/abs/2302.04659v1
https://arxiv.org/pdf/2302.04659v1.pdf
ManiSkill2: A Unified Benchmark for Generalizable Manipulation Skills
Generalizable manipulation skills, which can be composed to tackle long-horizon and complex daily chores, are one of the cornerstones of Embodied AI. However, existing benchmarks, mostly composed of a suite of simulatable environments, are insufficient to push cutting-edge research works because they lack object-level topological and geometric variations, are not based on fully dynamic simulation, or are short of native support for multiple types of manipulation tasks. To this end, we present ManiSkill2, the next generation of the SAPIEN ManiSkill benchmark, to address critical pain points often encountered by researchers when using benchmarks for generalizable manipulation skills. ManiSkill2 includes 20 manipulation task families with 2000+ object models and 4M+ demonstration frames, which cover stationary/mobile-base, single/dual-arm, and rigid/soft-body manipulation tasks with 2D/3D-input data simulated by fully dynamic engines. It defines a unified interface and evaluation protocol to support a wide range of algorithms (e.g., classic sense-plan-act, RL, IL), visual observations (point cloud, RGBD), and controllers (e.g., action type and parameterization). Moreover, it empowers fast visual input learning algorithms so that a CNN-based policy can collect samples at about 2000 FPS with 1 GPU and 16 processes on a regular workstation. It implements a render server infrastructure to allow sharing rendering resources across all environments, thereby significantly reducing memory usage. We open-source all codes of our benchmark (simulator, environments, and baselines) and host an online challenge open to interdisciplinary researchers.
['Hao Su', 'Rui Chen', 'Zhiao Huang', 'Pengwei Xie', 'Xiaodi Yuan', 'Yunchao Yao', 'Xinyue Wei', 'Stone Tao', 'Yihe Tang', 'Tongzhou Mu', 'Xiqiang Liu', 'Zhan Ling', 'Xuanlin Li', 'Fanbo Xiang', 'Jiayuan Gu']
2023-02-09
null
null
null
null
['robot-manipulation']
['robots']
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[4.623555660247803, 0.7832876443862915]
2c7cabd7-4831-4384-8e9d-a7333085d71e
exploiting-unsupervised-data-for-emotion
2010.01908
null
https://arxiv.org/abs/2010.01908v2
https://arxiv.org/pdf/2010.01908v2.pdf
Exploiting Unsupervised Data for Emotion Recognition in Conversations
Emotion Recognition in Conversations (ERC) aims to predict the emotional state of speakers in conversations, which is essentially a text classification task. Unlike the sentence-level text classification problem, the available supervised data for the ERC task is limited, which potentially prevents the models from playing their maximum effect. In this paper, we propose a novel approach to leverage unsupervised conversation data, which is more accessible. Specifically, we propose the Conversation Completion (ConvCom) task, which attempts to select the correct answer from candidate answers to fill a masked utterance in a conversation. Then, we Pre-train a basic COntext- Dependent Encoder (Pre-CODE) on the ConvCom task. Finally, we fine-tune the Pre-CODE on the datasets of ERC. Experimental results demonstrate that pre-training on unsupervised data achieves significant improvement of performance on the ERC datasets, particularly on the minority emotion classes.
['Irwin King', 'Michael R. Lyu', 'Wenxiang Jiao']
2020-10-02
null
https://aclanthology.org/2020.findings-emnlp.435
https://aclanthology.org/2020.findings-emnlp.435.pdf
findings-of-the-association-for-computational
['emotion-recognition-in-conversation']
['natural-language-processing']
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[13.130273818969727, 6.0322184562683105]
d8fb8b25-404e-4541-bbf8-e965a4c14a36
ranking-in-contextual-multi-armed-bandits
2207.00109
null
https://arxiv.org/abs/2207.00109v1
https://arxiv.org/pdf/2207.00109v1.pdf
Ranking in Contextual Multi-Armed Bandits
We study a ranking problem in the contextual multi-armed bandit setting. A learning agent selects an ordered list of items at each time step and observes stochastic outcomes for each position. In online recommendation systems, showing an ordered list of the most attractive items would not be the best choice since both position and item dependencies result in a complicated reward function. A very naive example is the lack of diversity when all the most attractive items are from the same category. We model position and item dependencies in the ordered list and design UCB and Thompson Sampling type algorithms for this problem. We prove that the regret bound over $T$ rounds and $L$ positions is $\Tilde{O}(L\sqrt{d T})$, which has the same order as the previous works with respect to $T$ and only increases linearly with $L$. Our work generalizes existing studies in several directions, including position dependencies where position discount is a particular case, and proposes a more general contextual bandit model.
['Arnaud Doucet', 'George Deligiannidis', 'Amitis Shidani']
2022-06-30
null
null
null
null
['thompson-sampling']
['methodology']
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[4.6173577308654785, 3.366774797439575]
ffdca9ee-6d15-4245-96d9-71f456e0cc20
dynamic-atomic-column-detection-in
2302.00816
null
https://arxiv.org/abs/2302.00816v1
https://arxiv.org/pdf/2302.00816v1.pdf
Dynamic Atomic Column Detection in Transmission Electron Microscopy Videos via Ridge Estimation
Ridge detection is a classical tool to extract curvilinear features in image processing. As such, it has great promise in applications to material science problems; specifically, for trend filtering relatively stable atom-shaped objects in image sequences, such as Transmission Electron Microscopy (TEM) videos. Standard analysis of TEM videos is limited to frame-by-frame object recognition. We instead harness temporal correlation across frames through simultaneous analysis of long image sequences, specified as a spatio-temporal image tensor. We define new ridge detection algorithms to non-parametrically estimate explicit trajectories of atomic-level object locations as a continuous function of time. Our approach is specially tailored to handle temporal analysis of objects that seemingly stochastically disappear and subsequently reappear throughout a sequence. We demonstrate that the proposed method is highly effective and efficient in simulation scenarios, and delivers notable performance improvements in TEM experiments compared to other material science benchmarks.
['David S. Matteson', 'Peter A. Crozier', 'Andrew M. Thomas', 'Yuchen Xu']
2023-02-02
null
null
null
null
['object-recognition']
['computer-vision']
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[12.214000701904297, -2.6167595386505127]
4264f803-2ca2-4529-9703-5ef4402d876b
a-useful-criterion-on-studying-consistent
2109.14950
null
https://arxiv.org/abs/2109.14950v2
https://arxiv.org/pdf/2109.14950v2.pdf
A useful criterion on studying consistent estimation in community detection
In network analysis, developing a unified theoretical framework that can compare methods under different models is an interesting problem. This paper proposes a partial solution to this problem. We summarize the idea of using separation condition for a standard network and sharp threshold of Erd\"os-R\'enyi random graph to study consistent estimation, compare theoretical error rates and requirements on network sparsity of spectral methods under models that can degenerate to stochastic block model as a four-step criterion SCSTC. Using SCSTC, we find some inconsistent phenomena on separation condition and sharp threshold in community detection. Especially, we find original theoretical results of the SPACL algorithm introduced to estimate network memberships under the mixed membership stochastic blockmodel were sub-optimal. To find the formation mechanism of inconsistencies, we re-establish theoretical convergence rates of this algorithm by applying recent techniques on row-wise eigenvector deviation. The results are further extended to the degree corrected mixed membership model. By comparison, our results enjoy smaller error rates, lesser dependence on the number of communities, weaker requirements on network sparsity, and so forth. Furthermore, separation condition and sharp threshold obtained from our theoretical results match classical results, which shows the usefulness of this criterion on studying consistent estimation.
['Huan Qing']
2021-09-30
null
null
null
null
['stochastic-block-model']
['graphs']
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[6.976063251495361, 5.200781345367432]
08e5f8aa-f4ee-41af-af4c-137ada9108c9
mvp-unified-motion-and-visual-self-supervised
2003.00667
null
https://arxiv.org/abs/2003.00667v1
https://arxiv.org/pdf/2003.00667v1.pdf
MVP: Unified Motion and Visual Self-Supervised Learning for Large-Scale Robotic Navigation
Autonomous navigation emerges from both motion and local visual perception in real-world environments. However, most successful robotic motion estimation methods (e.g. VO, SLAM, SfM) and vision systems (e.g. CNN, visual place recognition-VPR) are often separately used for mapping and localization tasks. Conversely, recent reinforcement learning (RL) based methods for visual navigation rely on the quality of GPS data reception, which may not be reliable when directly using it as ground truth across multiple, month-spaced traversals in large environments. In this paper, we propose a novel motion and visual perception approach, dubbed MVP, that unifies these two sensor modalities for large-scale, target-driven navigation tasks. Our MVP-based method can learn faster, and is more accurate and robust to both extreme environmental changes and poor GPS data than corresponding vision-only navigation methods. MVP temporally incorporates compact image representations, obtained using VPR, with optimized motion estimation data, including but not limited to those from VO or optimized radar odometry (RO), to efficiently learn self-supervised navigation policies via RL. We evaluate our method on two large real-world datasets, Oxford Robotcar and Nordland Railway, over a range of weather (e.g. overcast, night, snow, sun, rain, clouds) and seasonal (e.g. winter, spring, fall, summer) conditions using the new CityLearn framework; an interactive environment for efficiently training navigation agents. Our experimental results, on traversals of the Oxford RobotCar dataset with no GPS data, show that MVP can achieve 53% and 93% navigation success rate using VO and RO, respectively, compared to 7% for a vision-only method. We additionally report a trade-off between the RL success rate and the motion estimation precision.
['Marvin Chancán', 'Michael Milford']
2020-03-02
null
null
null
null
['radar-odometry']
['robots']
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[7.427687168121338, -1.9276379346847534]
f4386f99-57f8-4dd7-8b7d-d156cd209be3
performance-analysis-of-empirical-open-1
2306.16547
null
https://arxiv.org/abs/2306.16547v1
https://arxiv.org/pdf/2306.16547v1.pdf
Performance Analysis of Empirical Open-Circuit Voltage Modeling in Lithium Ion Batteries, Part-2: Data Collection Procedure
This paper is the second part of a series of papers about empirical approaches to open circuit voltage (OCV) modeling and its performance comparison in lithium-ion batteries. The first part of the series introduced various sources of uncertainties in the OCV models and established a theoretical relationship between uncertainties and the performance of a battery management system. In this paper, clearly defined approaches for low-rate OCV data collection are defined and described in detail. The data collection is designed with consideration to several parameters that affect the experimental time. Firstly, a more suitable method to fully charge the battery at different C-Rates is defined. Secondly, the OCV characterization following the full charge is described for various performance comparisons. Finally, optimal and efficient resistance estimation profiles are discussed. From the voltage, current and time data recorded using the procedure described in this paper, the OCV-SOC relationship is characterized and its uncertainties are modeled in the third part of this series of papers.
['Balakumar Balasingam', 'James Nguyen', 'Prarthana Pillai']
2023-06-28
null
null
null
null
['management']
['miscellaneous']
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[6.289844512939453, 2.749812602996826]
01b68053-4282-4f0a-a62a-1fde70221cfc
a-demand-driven-perspective-on-generative
2307.04292
null
https://arxiv.org/abs/2307.04292v1
https://arxiv.org/pdf/2307.04292v1.pdf
A Demand-Driven Perspective on Generative Audio AI
To achieve successful deployment of AI research, it is crucial to understand the demands of the industry. In this paper, we present the results of a survey conducted with professional audio engineers, in order to determine research priorities and define various research tasks. We also summarize the current challenges in audio quality and controllability based on the survey. Our analysis emphasizes that the availability of datasets is currently the main bottleneck for achieving high-quality audio generation. Finally, we suggest potential solutions for some revealed issues with empirical evidence.
['Ben Sangbae Chon', 'Keunwoo Choi', 'Hyeongi Moon', 'Minsung Kang', 'Sangshin Oh']
2023-07-10
null
null
null
null
['audio-generation']
['audio']
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[15.47815990447998, 5.804722309112549]
0790d9e7-d530-4edc-be41-28b061e0e29a
top-down-rst-parsing-utilizing-granularity
null
null
https://doi.org/10.1609/aaai.v34i05.6321
https://ojs.aaai.org/index.php/AAAI/article/view/6321/6177
Top-Down RST Parsing Utilizing Granularity Levels in Documents
Some downstream NLP tasks exploit discourse dependency trees converted from RST trees. To obtain better discourse dependency trees, we need to improve the accuracy of RST trees at the upper parts of the structures. Thus, we propose a novel neural top-down RST parsing method. Then, we exploit three levels of granularity in a document, paragraphs, sentences and Elementary Discourse Units (EDUs), to parse a document accurately and efficiently. The parsing is done in a top-down manner for each granularity level, by recursively splitting a larger text span into two smaller ones while predicting nuclearity and relation labels for the divided spans. The results on the RST-DT corpus show that our method achieved the state-of-the-art results, 87.0 unlabeled span score, 74.6 nuclearity labeled span score, and the comparable result with the state-of-the-art, 60.0 relation labeled span score. Furthermore, discourse dependency trees converted from our RST trees also achieved the state-of-the-art results, 64.9 unlabeled attachment score and 48.5 labeled attachment score.
['Masaaki Nagata', 'Manabu Okumura', 'Hidetaka Kamigaito', 'Tsutomu Hirao', 'Naoki Kobayashi']
2020-04-03
null
null
null
null
['discourse-parsing']
['natural-language-processing']
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[10.735918998718262, 9.417052268981934]
f8c83014-4fff-4d32-94df-57eeaea39aac
valuation-of-public-bus-electrification-with
2209.12107
null
https://arxiv.org/abs/2209.12107v1
https://arxiv.org/pdf/2209.12107v1.pdf
Valuation of Public Bus Electrification with Open Data
This research provides a novel framework to estimate the economic, environmental, and social values of electrifying public transit buses, for cities across the world, based on open-source data. Electric buses are a compelling candidate to replace diesel buses for the environmental and social benefits. However, the state-of-art models to evaluate the value of bus electrification are limited in applicability because they require granular and bespoke data on bus operation that can be difficult to procure. Our valuation tool uses General Transit Feed Specification, a standard data format used by transit agencies worldwide, to provide high-level guidance on developing a prioritization strategy for electrifying a bus fleet. We develop physics-informed machine learning models to evaluate the energy consumption, the carbon emissions, the health impacts, and the total cost of ownership for each transit route. We demonstrate the scalability of our tool with a case study of the bus lines in the Greater Boston and Milan metropolitan areas.
['Carlo Papa', 'Erika Mellekas', 'Christian Zulberti', 'Luigi Lanuzza', 'Giuseppe Ferrara', 'Sergio Gambacorta', 'David Rodriguez', 'Akshat Jain', 'Scott J. Moura', 'Soomin Woo', 'Upadhi Vijay']
2022-09-25
null
null
null
null
['physics-informed-machine-learning']
['graphs']
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[5.905526638031006, 2.1311838626861572]
1abb5674-b3d0-428b-bba4-407d5c5489f1
three-dimensional-generative-adversarial-nets
1911.08105
null
https://arxiv.org/abs/1911.08105v3
https://arxiv.org/pdf/1911.08105v3.pdf
Three-dimensional Generative Adversarial Nets for Unsupervised Metal Artifact Reduction
The reduction of metal artifacts in computed tomography (CT) images, specifically for strong artifacts generated from multiple metal objects, is a challenging issue in medical imaging research. Although there have been some studies on supervised metal artifact reduction through the learning of synthesized artifacts, it is difficult for simulated artifacts to cover the complexity of the real physical phenomena that may be observed in X-ray propagation. In this paper, we introduce metal artifact reduction methods based on an unsupervised volume-to-volume translation learned from clinical CT images. We construct three-dimensional adversarial nets with a regularized loss function designed for metal artifacts from multiple dental fillings. The results of experiments using 915 CT volumes from real patients demonstrate that the proposed framework has an outstanding capacity to reduce strong artifacts and to recover underlying missing voxels, while preserving the anatomical features of soft tissues and tooth structures from the original images.
['Yuichiro Imai', 'Megumi Nakao', 'Keiho Imanishi', 'Nobuhiro Ueda', 'Tadaaki Kirita', 'Tetsuya Matsuda']
2019-11-19
null
null
null
null
['metal-artifact-reduction']
['medical']
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[13.46764087677002, -2.546825408935547]
7417e00a-e61d-433a-866e-411bd9168172
residue-based-natural-language-adversarial-1
2204.10192
null
https://arxiv.org/abs/2204.10192v2
https://arxiv.org/pdf/2204.10192v2.pdf
Residue-Based Natural Language Adversarial Attack Detection
Deep learning based systems are susceptible to adversarial attacks, where a small, imperceptible change at the input alters the model prediction. However, to date the majority of the approaches to detect these attacks have been designed for image processing systems. Many popular image adversarial detection approaches are able to identify adversarial examples from embedding feature spaces, whilst in the NLP domain existing state of the art detection approaches solely focus on input text features, without consideration of model embedding spaces. This work examines what differences result when porting these image designed strategies to Natural Language Processing (NLP) tasks - these detectors are found to not port over well. This is expected as NLP systems have a very different form of input: discrete and sequential in nature, rather than the continuous and fixed size inputs for images. As an equivalent model-focused NLP detection approach, this work proposes a simple sentence-embedding "residue" based detector to identify adversarial examples. On many tasks, it out-performs ported image domain detectors and recent state of the art NLP specific detectors.
['Mark Gales', 'Vyas Raina']
2022-04-17
null
https://aclanthology.org/2022.naacl-main.281
https://aclanthology.org/2022.naacl-main.281.pdf
naacl-2022-7
['adversarial-attack-detection', 'adversarial-attack-detection']
['computer-vision', 'knowledge-base']
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[5.878303050994873, 8.059139251708984]
a44102e2-0bba-4374-8b97-979e0c3775ad
qaf-frame-semantics-based-question
null
null
https://aclanthology.org/W16-4412
https://aclanthology.org/W16-4412.pdf
QAF: Frame Semantics-based Question Interpretation
Natural language questions are interpreted to a sequence of patterns to be matched with instances of patterns in a knowledge base (KB) for answering. A natural language (NL) question answering (QA) system utilizes meaningful patterns matching the syntac-tic/lexical features between the NL questions and KB. In the most of KBs, there are only binary relations in triple form to represent relation between two entities or entity and a value using the domain specific ontology. However, the binary relation representation is not enough to cover complex information in questions, and the ontology vocabulary sometimes does not cover the lexical meaning in questions. Complex meaning needs a knowledge representation to link the binary relation-type triples in KB. In this paper, we propose a frame semantics-based semantic parsing approach as KB-independent question pre-processing. We will propose requirements of question interpretation in the KBQA perspective, and a query form representation based on our proposed format QAF (Ques-tion Answering with the Frame Semantics), which is supposed to cover the requirements. In QAF, frame semantics roles as a model to represent complex information in questions and to disambiguate the lexical meaning in questions to match with the ontology vocabu-lary. Our system takes a question as an input and outputs QAF-query by the process which assigns semantic information in the question to its corresponding frame semantic structure using the semantic parsing rules.
['Key-Sun Choi', 'Younggyun Hahm', 'Sangha Nam']
2016-12-01
null
null
null
ws-2016-12
['knowledge-base-question-answering']
['natural-language-processing']
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[10.415282249450684, 8.042506217956543]
e21af7d8-49e0-4a3e-aedc-2457494fabfb
the-overview-of-the-nlm-chem-biocreative-vii
null
null
https://biocreative.bioinformatics.udel.edu/resources/publications/bc-vii-workshop-proceedings/
https://biocreative.bioinformatics.udel.edu/media/store/files/2021/TRACK2_pos_01_BC7_submission_223.pdf
The overview of the NLM-Chem BioCreative VII track: full-text chemical identification and indexing in PubMed articles
The BioCreative NLM-Chem track calls for a community effort to fine-tune automated recognition of chemical names in biomedical literature. Chemical names are one of the most searched biomedical entities in PubMed and – as highlighted during the COVID-19 pandemic – their identification may significantly advance research in multiple biomedical subfields. While previous community challenges focused on identifying chemical names mentioned in titles and abstracts, the full text contains valuable additional detail. We organized the BioCreative NLM-Chem track to call for a community effort to address automated chemical entity recognition in full-text articles. The track consisted of two tasks: 1) Chemical Identification task, and 2) Chemical Indexing prediction task. For the Chemical Identification task, participants were expected to predict with high accuracy all chemicals mentioned in recently published full-text articles, both span (i.e., named entity recognition) and normalization (i.e., entity linking) using MeSH. For the Chemical Indexing task, participants identified which chemicals should be indexed as topics for the article's topic terms in the NLM article and indexing, i.e., appear in the listing of MeSH terms for the document.
['Zhiyong Lu', 'Rezarta Islamaj', 'Robert Leaman']
2021-11-08
null
null
null
biocreative-vii-challenge-evaluation-workshop
['chemical-entity-recognition', 'chemical-indexing']
['medical', 'natural-language-processing']
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[8.486650466918945, 8.729165077209473]
5b180a27-c231-4b18-aaa2-91c220d66f22
mirrornet-bio-inspired-adversarial-attack-for-1
2007.12881
null
https://arxiv.org/abs/2007.12881v3
https://arxiv.org/pdf/2007.12881v3.pdf
MirrorNet: Bio-Inspired Camouflaged Object Segmentation
Camouflaged objects are generally difficult to be detected in their natural environment even for human beings. In this paper, we propose a novel bio-inspired network, named the MirrorNet, that leverages both instance segmentation and mirror stream for the camouflaged object segmentation. Differently from existing networks for segmentation, our proposed network possesses two segmentation streams: the main stream and the mirror stream corresponding with the original image and its flipped image, respectively. The output from the mirror stream is then fused into the main stream's result for the final camouflage map to boost up the segmentation accuracy. Extensive experiments conducted on the public CAMO dataset demonstrate the effectiveness of our proposed network. Our proposed method achieves 89% in accuracy, outperforming the state-of-the-arts. Project Page: https://sites.google.com/view/ltnghia/research/camo
['Tam V. Nguyen', 'Thanh-Toan Do', 'Minh-Triet Tran', 'Khanh-Duy Nguyen', 'Trung-Nghia Le', 'Jinnan Yan']
2020-07-25
mirrornet-bio-inspired-adversarial-attack-for
null
null
pattern-recognition-journal-2020-7
['camouflage-segmentation', 'camouflaged-object-segmentation']
['computer-vision', 'computer-vision']
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[9.615591049194336, -0.13234348595142365]
b9744d7b-c648-41d1-8f70-3abb73befb5d
unsupervised-document-embedding-via
2103.14542
null
https://arxiv.org/abs/2103.14542v1
https://arxiv.org/pdf/2103.14542v1.pdf
Unsupervised Document Embedding via Contrastive Augmentation
We present a contrasting learning approach with data augmentation techniques to learn document representations in an unsupervised manner. Inspired by recent contrastive self-supervised learning algorithms used for image and NLP pretraining, we hypothesize that high-quality document embedding should be invariant to diverse paraphrases that preserve the semantics of the original document. With different backbones and contrastive learning frameworks, our study reveals the enormous benefits of contrastive augmentation for document representation learning with two additional insights: 1) including data augmentation in a contrastive way can substantially improve the embedding quality in unsupervised document representation learning, and 2) in general, stochastic augmentations generated by simple word-level manipulation work much better than sentence-level and document-level ones. We plug our method into a classifier and compare it with a broad range of baseline methods on six benchmark datasets. Our method can decrease the classification error rate by up to 6.4% over the SOTA approaches on the document classification task, matching or even surpassing fully-supervised methods.
['Xiang Zhang', 'Haifeng Chen', 'Dongjin Song', 'Zhengzhang Chen', 'Yanchi Liu', 'Bo Zong', 'Xuchao Zhang', 'Wenchao Yu', 'Jingchao Ni', 'Wei Cheng', 'Dongsheng Luo']
2021-03-26
null
null
null
null
['document-embedding']
['methodology']
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[9.577845573425293, 2.6745615005493164]
72403dc7-a0a0-42c0-bcb8-de250ac720b3
neural-micro-planning-for-data-to-text
null
null
https://aclanthology.org/2020.dt4tp-1.2
https://aclanthology.org/2020.dt4tp-1.2.pdf
Neural Micro-Planning for Data to Text Generation Produces more Cohesive Text
null
['Michael Elhadad', 'Roy Eisenstadt']
null
null
null
null
dt4tp-2020-12
['data-to-text-generation']
['natural-language-processing']
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[-7.400879859924316, 3.705815076828003]
b7970e15-9351-42ee-b996-c6add9adea0a
ream-sharp-an-enhancement-approach-to-1
null
null
https://aclanthology.org/2021.findings-acl.220
https://aclanthology.org/2021.findings-acl.220.pdf
REAM\sharp: An Enhancement Approach to Reference-based Evaluation Metrics for Open-domain Dialog Generation
null
['Shuming Shi', 'Ruifeng Xu', 'Wei Bi', 'Jun Gao']
null
null
null
null
findings-acl-2021-8
['open-domain-dialog']
['natural-language-processing']
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[-7.357307434082031, 3.636298418045044]
384b44d6-b1c7-4e22-8d98-fe8e4a1c9dbc
pseudo-session-based-recommendation-with
2306.10029
null
https://arxiv.org/abs/2306.10029v1
https://arxiv.org/pdf/2306.10029v1.pdf
Pseudo session-based recommendation with hierarchical embedding and session attributes
Recently, electronic commerce (EC) websites have been unable to provide an identification number (user ID) for each transaction data entry because of privacy issues. Because most recommendation methods assume that all data are assigned a user ID, they cannot be applied to the data without user IDs. Recently, session-based recommendation (SBR) based on session information, which is short-term behavioral information of users, has been studied. A general SBR uses only information about the item of interest to make a recommendation (e.g., item ID for an EC site). Particularly in the case of EC sites, the data recorded include the name of the item being purchased, the price of the item, the category hierarchy, and the gender and region of the user. In this study, we define a pseudo--session for the purchase history data of an EC site without user IDs and session IDs. Finally, we propose an SBR with a co-guided heterogeneous hypergraph and globalgraph network plus, called CoHHGN+. The results show that our CoHHGN+ can recommend items with higher performance than other methods.
['Satoshi Takahashi', 'Ryusei Numata', 'Yuta Sumiya']
2023-06-06
null
null
null
null
['session-based-recommendations']
['miscellaneous']
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[10.10521125793457, 5.661802291870117]
d43cc455-dab2-4785-8fd9-1744dc94fb71
pose-forecasting-in-industrial-human-robot
2208.07308
null
https://arxiv.org/abs/2208.07308v1
https://arxiv.org/pdf/2208.07308v1.pdf
Pose Forecasting in Industrial Human-Robot Collaboration
Pushing back the frontiers of collaborative robots in industrial environments, we propose a new Separable-Sparse Graph Convolutional Network (SeS-GCN) for pose forecasting. For the first time, SeS-GCN bottlenecks the interaction of the spatial, temporal and channel-wise dimensions in GCNs, and it learns sparse adjacency matrices by a teacher-student framework. Compared to the state-of-the-art, it only uses 1.72% of the parameters and it is ~4 times faster, while still performing comparably in forecasting accuracy on Human3.6M at 1 second in the future, which enables cobots to be aware of human operators. As a second contribution, we present a new benchmark of Cobots and Humans in Industrial COllaboration (CHICO). CHICO includes multi-view videos, 3D poses and trajectories of 20 human operators and cobots, engaging in 7 realistic industrial actions. Additionally, it reports 226 genuine collisions, taking place during the human-cobot interaction. We test SeS-GCN on CHICO for two important perception tasks in robotics: human pose forecasting, where it reaches an average error of 85.3 mm (MPJPE) at 1 sec in the future with a run time of 2.3 msec, and collision detection, by comparing the forecasted human motion with the known cobot motion, obtaining an F1-score of 0.64.
['Fabio Galasso', 'Marco Cristani', 'Francesco Setti', 'Geri Skenderi', 'Federico Cunico', 'Andrea Avogaro', "Guido D'Amely", 'Alessio Sampieri']
2022-07-24
null
null
null
null
['human-pose-forecasting']
['computer-vision']
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[5.007174015045166, 0.4563662111759186]
6279ee51-0926-470b-9ef7-45454dbfa923
prin-pointwise-rotation-invariant-network
1811.09361
null
https://arxiv.org/abs/1811.09361v5
https://arxiv.org/pdf/1811.09361v5.pdf
Pointwise Rotation-Invariant Network with Adaptive Sampling and 3D Spherical Voxel Convolution
Point cloud analysis without pose priors is very challenging in real applications, as the orientations of point clouds are often unknown. In this paper, we propose a brand new point-set learning framework PRIN, namely, Pointwise Rotation-Invariant Network, focusing on rotation-invariant feature extraction in point clouds analysis. We construct spherical signals by Density Aware Adaptive Sampling to deal with distorted point distributions in spherical space. In addition, we propose Spherical Voxel Convolution and Point Re-sampling to extract rotation-invariant features for each point. Our network can be applied to tasks ranging from object classification, part segmentation, to 3D feature matching and label alignment. We show that, on the dataset with randomly rotated point clouds, PRIN demonstrates better performance than state-of-the-art methods without any data augmentation. We also provide theoretical analysis for the rotation-invariance achieved by our methods.
['Lizhuang Ma', 'Yu-Wing Tai', 'Yang You', 'Cewu Lu', 'Yujing Lou', 'Weiming Wang', 'Qi Liu']
2018-11-23
null
null
null
null
['3d-feature-matching']
['computer-vision']
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[7.961167812347412, -3.4737086296081543]
8283d072-88b3-4a8a-91e2-de68a5eacb2f
cross-language-learning-with-adversarial
null
null
https://aclanthology.org/K17-1024
https://aclanthology.org/K17-1024.pdf
Cross-language Learning with Adversarial Neural Networks
We address the problem of cross-language adaptation for question-question similarity reranking in community question answering, with the objective to port a system trained on one input language to another input language given labeled training data for the first language and only unlabeled data for the second language. In particular, we propose to use adversarial training of neural networks to learn high-level features that are discriminative for the main learning task, and at the same time are invariant across the input languages. The evaluation results show sizable improvements for our cross-language adversarial neural network (CLANN) model over a strong non-adversarial system.
["Llu{\\'\\i}s M{\\`a}rquez", 'Preslav Nakov', 'Shafiq Joty', 'Israa Jaradat']
2017-08-01
null
null
null
conll-2017-8
['question-similarity']
['natural-language-processing']
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[11.301753044128418, 8.182782173156738]
2227f9d7-935f-411f-b77f-4ae14431419b
a-framework-for-adapting-offline-algorithms
2301.13326
null
https://arxiv.org/abs/2301.13326v1
https://arxiv.org/pdf/2301.13326v1.pdf
A Framework for Adapting Offline Algorithms to Solve Combinatorial Multi-Armed Bandit Problems with Bandit Feedback
We investigate the problem of stochastic, combinatorial multi-armed bandits where the learner only has access to bandit feedback and the reward function can be non-linear. We provide a general framework for adapting discrete offline approximation algorithms into sublinear $\alpha$-regret methods that only require bandit feedback, achieving $\mathcal{O}\left(T^\frac{2}{3}\log(T)^\frac{1}{3}\right)$ expected cumulative $\alpha$-regret dependence on the horizon $T$. The framework only requires the offline algorithms to be robust to small errors in function evaluation. The adaptation procedure does not even require explicit knowledge of the offline approximation algorithm -- the offline algorithm can be used as black box subroutine. To demonstrate the utility of the proposed framework, the proposed framework is applied to multiple problems in submodular maximization, adapting approximation algorithms for cardinality and for knapsack constraints. The new CMAB algorithms for knapsack constraints outperform a full-bandit method developed for the adversarial setting in experiments with real-world data.
['Christopher John Quinn', 'Vaneet Aggarwal', 'Yanhui Zhu', 'Yididiya Y Nadew', 'Guanyu Nie']
2023-01-30
null
null
null
null
['multi-armed-bandits']
['miscellaneous']
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[4.576333522796631, 3.3663978576660156]
cebd6b77-4912-4ce8-90ca-e4823ee6c28c
exploring-stroke-level-modifications-for
2212.01982
null
https://arxiv.org/abs/2212.01982v1
https://arxiv.org/pdf/2212.01982v1.pdf
Exploring Stroke-Level Modifications for Scene Text Editing
Scene text editing (STE) aims to replace text with the desired one while preserving background and styles of the original text. However, due to the complicated background textures and various text styles, existing methods fall short in generating clear and legible edited text images. In this study, we attribute the poor editing performance to two problems: 1) Implicit decoupling structure. Previous methods of editing the whole image have to learn different translation rules of background and text regions simultaneously. 2) Domain gap. Due to the lack of edited real scene text images, the network can only be well trained on synthetic pairs and performs poorly on real-world images. To handle the above problems, we propose a novel network by MOdifying Scene Text image at strokE Level (MOSTEL). Firstly, we generate stroke guidance maps to explicitly indicate regions to be edited. Different from the implicit one by directly modifying all the pixels at image level, such explicit instructions filter out the distractions from background and guide the network to focus on editing rules of text regions. Secondly, we propose a Semi-supervised Hybrid Learning to train the network with both labeled synthetic images and unpaired real scene text images. Thus, the STE model is adapted to real-world datasets distributions. Moreover, two new datasets (Tamper-Syn2k and Tamper-Scene) are proposed to fill the blank of public evaluation datasets. Extensive experiments demonstrate that our MOSTEL outperforms previous methods both qualitatively and quantitatively. Datasets and code will be available at https://github.com/qqqyd/MOSTEL.
['Yongdong Zhang', 'Yuxin Wang', 'Jianjun Xu', 'Hongtao Xie', 'Qingfeng Tan', 'Yadong Qu']
2022-12-05
null
null
null
null
['scene-text-editing']
['computer-vision']
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[11.516582489013672, -0.20081087946891785]
76a43e22-e85f-407a-a129-60da27b873b0
cherrypicker-semantic-skeletonization-and
2304.04708
null
https://arxiv.org/abs/2304.04708v1
https://arxiv.org/pdf/2304.04708v1.pdf
CherryPicker: Semantic Skeletonization and Topological Reconstruction of Cherry Trees
In plant phenotyping, accurate trait extraction from 3D point clouds of trees is still an open problem. For automatic modeling and trait extraction of tree organs such as blossoms and fruits, the semantically segmented point cloud of a tree and the tree skeleton are necessary. Therefore, we present CherryPicker, an automatic pipeline that reconstructs photo-metric point clouds of trees, performs semantic segmentation and extracts their topological structure in form of a skeleton. Our system combines several state-of-the-art algorithms to enable automatic processing for further usage in 3D-plant phenotyping applications. Within this pipeline, we present a method to automatically estimate the scale factor of a monocular reconstruction to overcome scale ambiguity and obtain metrically correct point clouds. Furthermore, we propose a semantic skeletonization algorithm build up on Laplacian-based contraction. We also show by weighting different tree organs semantically, our approach can effectively remove artifacts induced by occlusion and structural size variations. CherryPicker obtains high-quality topology reconstructions of cherry trees with precise details.
['Marc Stamminger', 'Oliver Scholz', 'Andreas Gilson', 'Lukas Meyer']
2023-04-10
null
null
null
null
['plant-phenotyping']
['computer-vision']
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[8.973226547241211, -1.7773329019546509]
0deba036-9561-4b77-abc8-3f212980aec7
a-natural-upper-bound-to-the-accuracy-of
1809.10389
null
http://arxiv.org/abs/1809.10389v1
http://arxiv.org/pdf/1809.10389v1.pdf
A natural upper bound to the accuracy of predicting protein stability changes upon mutations
Accurate prediction of protein stability changes upon single-site variations (DDG) is important for protein design, as well as our understanding of the mechanism of genetic diseases. The performance of high-throughput computational methods to this end is evaluated mostly based on the Pearson correlation coefficient between predicted and observed data, assuming that the upper bound would be 1 (perfect correlation). However, the performance of these predictors can be limited by the distribution and noise of the experimental data. Here we estimate, for the first time, a theoretical upper-bound to the DDG prediction performances imposed by the intrinsic structure of currently available DDG data. Given a set of measured DDG protein variations, the theoretically best predictor is estimated based on its similarity to another set of experimentally determined DDG values. We investigate the correlation between pairs of measured DDG variations, where one is used as a predictor for the other. We analytically derive an upper bound to the Pearson correlation as a function of the noise and distribution of the DDG data. We also evaluate the available datasets to highlight the effect of the noise in conjunction with DDG distribution. We conclude that the upper bound is a function of both uncertainty and spread of the DDG values, and that with current data the best performance should be between 0.7-0.8, depending on the dataset used; higher Pearson correlations might be indicative of overtraining. It also follows that comparisons of predictors using different datasets are inherently misleading.
[]
2018-09-27
null
null
null
null
['protein-design']
['medical']
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[4.88426399230957, 5.357780456542969]
224f7291-3759-430b-99df-43bb24b1c473
image-based-navigation-using-visual-features
1812.03795
null
https://arxiv.org/abs/1812.03795v2
https://arxiv.org/pdf/1812.03795v2.pdf
Mapping, Localization and Path Planning for Image-based Navigation using Visual Features and Map
Building on progress in feature representations for image retrieval, image-based localization has seen a surge of research interest. Image-based localization has the advantage of being inexpensive and efficient, often avoiding the use of 3D metric maps altogether. That said, the need to maintain a large number of reference images as an effective support of localization in a scene, nonetheless calls for them to be organized in a map structure of some kind. The problem of localization often arises as part of a navigation process. We are, therefore, interested in summarizing the reference images as a set of landmarks, which meet the requirements for image-based navigation. A contribution of this paper is to formulate such a set of requirements for the two sub-tasks involved: map construction and self-localization. These requirements are then exploited for compact map representation and accurate self-localization, using the framework of a network flow problem. During this process, we formulate the map construction and self-localization problems as convex quadratic and second-order cone programs, respectively. We evaluate our methods on publicly available indoor and outdoor datasets, where they outperform existing methods significantly.
['Luc van Gool', 'Danda Pani Paudel', 'Thomas Probst', 'Ajad Chhatkuli', 'Janine Thoma']
2018-12-10
mapping-localization-and-path-planning-for
http://openaccess.thecvf.com/content_CVPR_2019/html/Thoma_Mapping_Localization_and_Path_Planning_for_Image-Based_Navigation_Using_Visual_CVPR_2019_paper.html
http://openaccess.thecvf.com/content_CVPR_2019/papers/Thoma_Mapping_Localization_and_Path_Planning_for_Image-Based_Navigation_Using_Visual_CVPR_2019_paper.pdf
cvpr-2019-6
['image-based-localization']
['computer-vision']
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[7.662446975708008, -2.175915241241455]
2dee3d9a-ae21-4686-92f1-6e8c5f1a8b7d
unsupervised-document-embedding-with-cnns
1711.04168
null
http://arxiv.org/abs/1711.04168v3
http://arxiv.org/pdf/1711.04168v3.pdf
Unsupervised Document Embedding With CNNs
We propose a new model for unsupervised document embedding. Leading existing approaches either require complex inference or use recurrent neural networks (RNN) that are difficult to parallelize. We take a different route and develop a convolutional neural network (CNN) embedding model. Our CNN architecture is fully parallelizable resulting in over 10x speedup in inference time over RNN models. Parallelizable architecture enables to train deeper models where each successive layer has increasingly larger receptive field and models longer range semantic structure within the document. We additionally propose a fully unsupervised learning algorithm to train this model based on stochastic forward prediction. Empirical results on two public benchmarks show that our approach produces comparable to state-of-the-art accuracy at a fraction of computational cost.
['Maksims Volkovs', 'Shunan Zhao', 'Chundi Liu']
2017-11-11
null
null
null
null
['document-embedding']
['methodology']
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[10.749000549316406, 7.705173015594482]
d379ec2e-f548-4141-a71b-44e0c849fcfe
a-data-driven-strategy-to-combine-word
2105.12788
null
https://arxiv.org/abs/2105.12788v1
https://arxiv.org/pdf/2105.12788v1.pdf
A data-driven strategy to combine word embeddings in information retrieval
Word embeddings are vital descriptors of words in unigram representations of documents for many tasks in natural language processing and information retrieval. The representation of queries has been one of the most critical challenges in this area because it consists of a few terms and has little descriptive capacity. Strategies such as average word embeddings can enrich the queries' descriptive capacity since they favor the identification of related terms from the continuous vector representations that characterize these approaches. We propose a data-driven strategy to combine word embeddings. We use Idf combinations of embeddings to represent queries, showing that these representations outperform the average word embeddings recently proposed in the literature. Experimental results on benchmark data show that our proposal performs well, suggesting that data-driven combinations of word embeddings are a promising line of research in ad-hoc information retrieval.
['Marcelo Mendoza', 'Alfredo Silva']
2021-05-26
null
null
null
null
['ad-hoc-information-retrieval']
['natural-language-processing']
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[10.609394073486328, 8.505160331726074]
75404176-0560-443d-a73b-2ea9b77e015b
automatic-personality-prediction-an-enhanced
2007.04571
null
https://arxiv.org/abs/2007.04571v3
https://arxiv.org/pdf/2007.04571v3.pdf
Automatic Personality Prediction; an Enhanced Method Using Ensemble Modeling
Human personality is significantly represented by those words which he/she uses in his/her speech or writing. As a consequence of spreading the information infrastructures (specifically the Internet and social media), human communications have reformed notably from face to face communication. Generally, Automatic Personality Prediction (or Perception) (APP) is the automated forecasting of the personality on different types of human generated/exchanged contents (like text, speech, image, video, etc.). The major objective of this study is to enhance the accuracy of APP from the text. To this end, we suggest five new APP methods including term frequency vector-based, ontology-based, enriched ontology-based, latent semantic analysis (LSA)-based, and deep learning-based (BiLSTM) methods. These methods as the base ones, contribute to each other to enhance the APP accuracy through ensemble modeling (stacking) based on a hierarchical attention network (HAN) as the meta-model. The results show that ensemble modeling enhances the accuracy of APP.
['Taymaz Rahkar-Farshi', 'Elnaz Zafarani-Moattar', 'Zoleikha Jahanbakhsh-Nagadeh', 'Mehrdad Ranjbar-Khadivi', 'Narjes Nikzad-Khasmakhi', 'Ali-Reza Feizi-Derakhshi', 'Meysam Asgari-Chenaghlu', 'Mohammad-Ali Balafar', 'Mohammad-Reza Feizi-Derakhshi', 'Majid Ramezani']
2020-07-09
null
null
null
null
['personality-trait-recognition']
['computer-vision']
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[12.992971420288086, 5.909172058105469]
8ab89246-1c91-4339-b7b1-18da02c868f4
search-based-task-and-motion-planning-for
2301.10384
null
https://arxiv.org/abs/2301.10384v1
https://arxiv.org/pdf/2301.10384v1.pdf
Search-Based Task and Motion Planning for Hybrid Systems: Agile Autonomous Vehicles
To achieve optimal robot behavior in dynamic scenarios we need to consider complex dynamics in a predictive manner. In the vehicle dynamics community, it is well know that to achieve time-optimal driving on low surface, the vehicle should utilize drifting. Hence many authors have devised rules to split circuits and employ drifting on some segments. These rules are suboptimal and do not generalize to arbitrary circuit shapes (e.g., S-like curves). So, the question "When to go into which mode and how to drive in it?" remains unanswered. To choose the suitable mode (discrete decision), the algorithm needs information about the feasibility of the continuous motion in that mode. This makes it a class of Task and Motion Planning (TAMP) problems, which are known to be hard to solve optimally in real-time. In the AI planning community, search methods are commonly used. However, they cannot be directly applied to TAMP problems due to the continuous component. Here, we present a search-based method that effectively solves this problem and efficiently searches in a highly dimensional state space with nonlinear and unstable dynamics. The space of the possible trajectories is explored by sampling different combinations of motion primitives guided by the search. Our approach allows to use multiple locally approximated models to generate motion primitives (e.g., learned models of drifting) and effectively simplify the problem without losing accuracy. The algorithm performance is evaluated in simulated driving on a mixed-track with segments of different curvatures (right and left). Our code is available at https://git.io/JenvB
['Antonella Ferrara', 'Martin Horn', 'Hana Ćatić', 'Barys Shyrokau', 'Enrico Regolin', 'Zlatan Ajanović']
2023-01-25
null
null
null
null
['community-search', 'motion-planning']
['graphs', 'robots']
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[5.155618190765381, 1.5857784748077393]
3d17d01e-f516-41f5-99a5-1387b0705a2b
to-drop-or-not-to-drop-robustness-consistency
1503.02031
null
http://arxiv.org/abs/1503.02031v1
http://arxiv.org/pdf/1503.02031v1.pdf
To Drop or Not to Drop: Robustness, Consistency and Differential Privacy Properties of Dropout
Training deep belief networks (DBNs) requires optimizing a non-convex function with an extremely large number of parameters. Naturally, existing gradient descent (GD) based methods are prone to arbitrarily poor local minima. In this paper, we rigorously show that such local minima can be avoided (upto an approximation error) by using the dropout technique, a widely used heuristic in this domain. In particular, we show that by randomly dropping a few nodes of a one-hidden layer neural network, the training objective function, up to a certain approximation error, decreases by a multiplicative factor. On the flip side, we show that for training convex empirical risk minimizers (ERM), dropout in fact acts as a "stabilizer" or regularizer. That is, a simple dropout based GD method for convex ERMs is stable in the face of arbitrary changes to any one of the training points. Using the above assertion, we show that dropout provides fast rates for generalization error in learning (convex) generalized linear models (GLM). Moreover, using the above mentioned stability properties of dropout, we design dropout based differentially private algorithms for solving ERMs. The learned GLM thus, preserves privacy of each of the individual training points while providing accurate predictions for new test points. Finally, we empirically validate our stability assertions for dropout in the context of convex ERMs and show that surprisingly, dropout significantly outperforms (in terms of prediction accuracy) the L2 regularization based methods for several benchmark datasets.
['Oliver Williams', 'Vivek Kulkarni', 'Abhradeep Thakurta', 'Prateek Jain']
2015-03-06
null
null
null
null
['l2-regularization']
['methodology']
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[7.767922401428223, 3.9903976917266846]
e1b3b444-8424-47a9-b45f-4a6e835914ac
deep-metric-learning-based-feature-embedding
null
null
https://doi.org/10.1109/TGRS.2019.2946318
https://doi.org/10.1109/TGRS.2019.2946318
Deep Metric Learning-Based Feature Embedding for Hyperspectral Image Classification
Learning from a limited number of labeled samples (pixels) remains a key challenge in the hyperspectral image (HSI) classification. To address this issue, we propose a deep metric learning-based feature embedding model, which can meet the tasks both for same- and cross-scene HSI classifications. In the first task, when only a few labeled samples are available, we employ ideas from metric learning based on deep embedding features and make a similarity learning between pairs of samples. In this case, the proposed model can learn well to compare whether two samples belong to the same class. In another task, when an HSI image (target scene) that needs to be classified is not labeled at all, the embedding model can learn from another similar HSI image (source scene) with sufficient labeled samples and then transfer to the target model by using an unsupervised domain adaptation technique, which not only employs the adversarial approach to make the embedding features from the source and target samples indistinguishable but also encourages the target scene's embeddings to form similar clusters with the source scene one. After the domain adaptation between the HSIs of the two scenes is finished, any traditional HSI classifier can be used. In a simple manner, the nearest neighbor (NN) algorithm is selected as the classifier for the classification tasks throughout this article. The experimental results from a series of popular HSIs demonstrate the advantages of the proposed model both in the same- and cross-scene classification tasks.
['Daming Shi', 'Sen Jia', 'Bin Deng']
2019-10-30
null
null
null
ieee-transactions-on-geoscience-and-remote-15
['metric-learning', 'scene-classification', 'few-shot-image-classification', 'metric-learning']
['computer-vision', 'computer-vision', 'computer-vision', 'methodology']
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[9.961955070495605, -1.4404453039169312]
0c7ed5fd-44af-40f7-a3a2-3aad7d64de07
a-little-pretraining-goes-a-long-way-a-case
2102.06551
null
https://arxiv.org/abs/2102.06551v2
https://arxiv.org/pdf/2102.06551v2.pdf
A Little Pretraining Goes a Long Way: A Case Study on Dependency Parsing Task for Low-resource Morphologically Rich Languages
Neural dependency parsing has achieved remarkable performance for many domains and languages. The bottleneck of massive labeled data limits the effectiveness of these approaches for low resource languages. In this work, we focus on dependency parsing for morphological rich languages (MRLs) in a low-resource setting. Although morphological information is essential for the dependency parsing task, the morphological disambiguation and lack of powerful analyzers pose challenges to get this information for MRLs. To address these challenges, we propose simple auxiliary tasks for pretraining. We perform experiments on 10 MRLs in low-resource settings to measure the efficacy of our proposed pretraining method and observe an average absolute gain of 2 points (UAS) and 3.6 points (LAS). Code and data available at: https://github.com/jivnesh/LCM
['Pawan Goyal', 'Laxmidhar Behera', 'Ashim Gupta', 'Amrith Krishna', 'Jivnesh Sandhan']
2021-02-12
null
https://aclanthology.org/2021.eacl-srw.16
https://aclanthology.org/2021.eacl-srw.16.pdf
eacl-2021-2
['morphological-disambiguation']
['natural-language-processing']
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[10.467031478881836, 9.869367599487305]
f1fb1dbe-8b45-42a0-a43f-6c0c07c45270
schooling-to-exploit-foolish-contracts
2304.10737
null
https://arxiv.org/abs/2304.10737v1
https://arxiv.org/pdf/2304.10737v1.pdf
Schooling to Exploit Foolish Contracts
We introduce SCooLS, our Smart Contract Learning (Semi-supervised) engine. SCooLS uses neural networks to analyze Ethereum contract bytecode and identifies specific vulnerable functions. SCooLS incorporates two key elements: semi-supervised learning and graph neural networks (GNNs). Semi-supervised learning produces more accurate models than unsupervised learning, while not requiring the large oracle-labeled training set that supervised learning requires. GNNs enable direct analysis of smart contract bytecode without any manual feature engineering, predefined patterns, or expert rules. SCooLS is the first application of semi-supervised learning to smart contract vulnerability analysis, as well as the first deep learning-based vulnerability analyzer to identify specific vulnerable functions. SCooLS's performance is better than existing tools, with an accuracy level of 98.4%, an F1 score of 90.5%, and an exceptionally low false positive rate of only 0.8%. Furthermore, SCooLS is fast, analyzing a typical function in 0.05 seconds. We leverage SCooLS's ability to identify specific vulnerable functions to build an exploit generator, which was successful in stealing Ether from 76.9% of the true positives.
['Aquinas Hobor', 'Tamer Abdelaziz']
2023-04-21
null
null
null
null
['feature-engineering']
['methodology']
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[6.871028423309326, 7.426784515380859]
30cec8ff-c663-481b-b376-f66dfd35856f
variational-autoencoding-molecular-graphs
2307.00623
null
https://arxiv.org/abs/2307.00623v1
https://arxiv.org/pdf/2307.00623v1.pdf
Variational Autoencoding Molecular Graphs with Denoising Diffusion Probabilistic Model
In data-driven drug discovery, designing molecular descriptors is a very important task. Deep generative models such as variational autoencoders (VAEs) offer a potential solution by designing descriptors as probabilistic latent vectors derived from molecular structures. These models can be trained on large datasets, which have only molecular structures, and applied to transfer learning. Nevertheless, the approximate posterior distribution of the latent vectors of the usual VAE assumes a simple multivariate Gaussian distribution with zero covariance, which may limit the performance of representing the latent features. To overcome this limitation, we propose a novel molecular deep generative model that incorporates a hierarchical structure into the probabilistic latent vectors. We achieve this by a denoising diffusion probabilistic model (DDPM). We demonstrate that our model can design effective molecular latent vectors for molecular property prediction from some experiments by small datasets on physical properties and activity. The results highlight the superior prediction performance and robustness of our model compared to existing approaches.
['Shigehiko Kanaya', 'Naoaki Ono', 'Daiki Koge']
2023-07-02
null
null
null
null
['drug-discovery', 'property-prediction', 'transfer-learning', 'molecular-property-prediction']
['medical', 'medical', 'miscellaneous', 'miscellaneous']
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[5.129680156707764, 5.830612659454346]
a692ac37-e873-4547-a222-df507dfbff66
multi-view-human-body-mesh-translator
2210.01886
null
https://arxiv.org/abs/2210.01886v1
https://arxiv.org/pdf/2210.01886v1.pdf
Multi-view Human Body Mesh Translator
Existing methods for human mesh recovery mainly focus on single-view frameworks, but they often fail to produce accurate results due to the ill-posed setup. Considering the maturity of the multi-view motion capture system, in this paper, we propose to solve the prior ill-posed problem by leveraging multiple images from different views, thus significantly enhancing the quality of recovered meshes. In particular, we present a novel \textbf{M}ulti-view human body \textbf{M}esh \textbf{T}ranslator (MMT) model for estimating human body mesh with the help of vision transformer. Specifically, MMT takes multi-view images as input and translates them to targeted meshes in a single-forward manner. MMT fuses features of different views in both encoding and decoding phases, leading to representations embedded with global information. Additionally, to ensure the tokens are intensively focused on the human pose and shape, MMT conducts cross-view alignment at the feature level by projecting 3D keypoint positions to each view and enforcing their consistency in geometry constraints. Comprehensive experiments demonstrate that MMT outperforms existing single or multi-view models by a large margin for human mesh recovery task, notably, 28.8\% improvement in MPVE over the current state-of-the-art method on the challenging HUMBI dataset. Qualitative evaluation also verifies the effectiveness of MMT in reconstructing high-quality human mesh. Codes will be made available upon acceptance.
['Si Liu', 'Luoqi Liu', 'Zitian Wang', 'Xuecheng Nie', 'Xiangjian Jiang']
2022-10-04
null
null
null
null
['human-mesh-recovery']
['computer-vision']
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[7.067468643188477, -1.1307491064071655]
9e75e0e8-72c7-4013-8389-b70012a3836e
mdpgt-momentum-based-decentralized-policy
2112.02813
null
https://arxiv.org/abs/2112.02813v1
https://arxiv.org/pdf/2112.02813v1.pdf
MDPGT: Momentum-based Decentralized Policy Gradient Tracking
We propose a novel policy gradient method for multi-agent reinforcement learning, which leverages two different variance-reduction techniques and does not require large batches over iterations. Specifically, we propose a momentum-based decentralized policy gradient tracking (MDPGT) where a new momentum-based variance reduction technique is used to approximate the local policy gradient surrogate with importance sampling, and an intermediate parameter is adopted to track two consecutive policy gradient surrogates. Moreover, MDPGT provably achieves the best available sample complexity of $\mathcal{O}(N^{-1}\epsilon^{-3})$ for converging to an $\epsilon$-stationary point of the global average of $N$ local performance functions (possibly nonconcave). This outperforms the state-of-the-art sample complexity in decentralized model-free reinforcement learning, and when initialized with a single trajectory, the sample complexity matches those obtained by the existing decentralized policy gradient methods. We further validate the theoretical claim for the Gaussian policy function. When the required error tolerance $\epsilon$ is small enough, MDPGT leads to a linear speed up, which has been previously established in decentralized stochastic optimization, but not for reinforcement learning. Lastly, we provide empirical results on a multi-agent reinforcement learning benchmark environment to support our theoretical findings.
['Soumik Sarkar', 'Chinmay Hegde', 'Young M. Lee', 'Aditya Balu', 'Kai Liang Tan', 'Sin Yong Tan', 'Xian Yeow Lee', 'Zhanhong Jiang']
2021-12-06
null
null
null
null
['policy-gradient-methods']
['methodology']
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[4.126123905181885, 2.5302019119262695]
389b4b1d-1b10-40c2-942b-3a5e461b902b
improving-scheduled-sampling-for-neural
2305.15958
null
https://arxiv.org/abs/2305.15958v1
https://arxiv.org/pdf/2305.15958v1.pdf
Improving Scheduled Sampling for Neural Transducer-based ASR
The recurrent neural network-transducer (RNNT) is a promising approach for automatic speech recognition (ASR) with the introduction of a prediction network that autoregressively considers linguistic aspects. To train the autoregressive part, the ground-truth tokens are used as substitutions for the previous output token, which leads to insufficient robustness to incorrect past tokens; a recognition error in the decoding leads to further errors. Scheduled sampling (SS) is a technique to train autoregressive model robustly to past errors by randomly replacing some ground-truth tokens with actual outputs generated from a model. SS mitigates the gaps between training and decoding steps, known as exposure bias, and it is often used for attentional encoder-decoder training. However SS has not been fully examined for RNNT because of the difficulty in applying SS to RNNT due to the complicated RNNT output form. In this paper we propose SS approaches suited for RNNT. Our SS approaches sample the tokens generated from the distiribution of RNNT itself, i.e. internal language model or RNNT outputs. Experiments in three datasets confirm that RNNT trained with our SS approach achieves the best ASR performance. In particular, on a Japanese ASR task, our best system outperforms the previous state-of-the-art alternative.
['Ryo Masumura', 'Tomohiro Tanaka', 'Kohei Matsuura', 'Hiroshi Sato', 'Takanori Ashihara', 'Takafumi Moriya']
2023-05-25
null
null
null
null
['automatic-speech-recognition']
['speech']
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[14.465428352355957, 6.774567127227783]
dee54fff-dc60-4e82-9fc6-4d166a13583f
designing-rotationally-invariant-neural
2108.13993
null
https://arxiv.org/abs/2108.13993v2
https://arxiv.org/pdf/2108.13993v2.pdf
Designing Rotationally Invariant Neural Networks from PDEs and Variational Methods
Partial differential equation (PDE) models and their associated variational energy formulations are often rotationally invariant by design. This ensures that a rotation of the input results in a corresponding rotation of the output, which is desirable in applications such as image analysis. Convolutional neural networks (CNNs) do not share this property, and existing remedies are often complex. The goal of our paper is to investigate how diffusion and variational models achieve rotation invariance and transfer these ideas to neural networks. As a core novelty we propose activation functions which couple network channels by combining information from several oriented filters. This guarantees rotation invariance within the basic building blocks of the networks while still allowing for directional filtering. The resulting neural architectures are inherently rotationally invariant. With only a few small filters, they can achieve the same invariance as existing techniques which require a fine-grained sampling of orientations. Our findings help to translate diffusion and variational models into mathematically well-founded network architectures, and provide novel concepts for model-based CNN design.
['Matthias Augustin', 'Pascal Peter', 'Joachim Weickert', 'Karl Schrader', 'Tobias Alt']
2021-08-31
null
null
null
null
['novel-concepts']
['reasoning']
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[9.063260078430176, 2.3216493129730225]
ff99f73f-ccc4-4bd5-8678-19ded7a07f91
creativity-of-ai-automatic-symbolic-option
2112.09836
null
https://arxiv.org/abs/2112.09836v2
https://arxiv.org/pdf/2112.09836v2.pdf
Creativity of AI: Hierarchical Planning Model Learning for Facilitating Deep Reinforcement Learning
Despite of achieving great success in real-world applications, Deep Reinforcement Learning (DRL) is still suffering from three critical issues, i.e., data efficiency, lack of the interpretability and transferability. Recent research shows that embedding symbolic knowledge into DRL is promising in addressing those challenges. Inspired by this, we introduce a novel deep reinforcement learning framework with symbolic options. Our framework features a loop training procedure, which enables guiding the improvement of policy by planning with planning models (including action models and hierarchical task network models) and symbolic options learned from interactive trajectories automatically. The learned symbolic options alleviate the dense requirement of expert domain knowledge and provide inherent interpretability of policies. Moreover, the transferability and data efficiency can be further improved by planning with the symbolic planning models. To validate the effectiveness of our framework, we conduct experiments on two domains, Montezuma's Revenge and Office World, respectively. The results demonstrate the comparable performance, improved data efficiency, interpretability and transferability.
['Shuting Deng', 'Hankz Hankui Zhuo', 'Chao Yu', 'Chen Chen', 'Kebing Jin', 'Zhihao Ma', 'Mu Jin']
2021-12-18
null
null
null
null
['montezumas-revenge']
['playing-games']
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[4.2476959228515625, 1.6844491958618164]
ad1f1356-7f25-4668-ae09-808c471deba0
morphological-change-forecasting-for-prostate
2101.06425
null
https://arxiv.org/abs/2101.06425v1
https://arxiv.org/pdf/2101.06425v1.pdf
Morphological Change Forecasting for Prostate Glands using Feature-based Registration and Kernel Density Extrapolation
Organ morphology is a key indicator for prostate disease diagnosis and prognosis. For instance, In longitudinal study of prostate cancer patients under active surveillance, the volume, boundary smoothness and their changes are closely monitored on time-series MR image data. In this paper, we describe a new framework for forecasting prostate morphological changes, as the ability to detect such changes earlier than what is currently possible may enable timely treatment or avoiding unnecessary confirmatory biopsies. In this work, an efficient feature-based MR image registration is first developed to align delineated prostate gland capsules to quantify the morphological changes using the inferred dense displacement fields (DDFs). We then propose to use kernel density estimation (KDE) of the probability density of the DDF-represented \textit{future morphology changes}, between current and future time points, before the future data become available. The KDE utilises a novel distance function that takes into account morphology, stage-of-progression and duration-of-change, which are considered factors in such subject-specific forecasting. We validate the proposed approach on image masks unseen to registration network training, without using any data acquired at the future target time points. The experiment results are presented on a longitudinal data set with 331 images from 73 patients, yielding an average Dice score of 0.865 on a holdout set, between the ground-truth and the image masks warped by the KDE-predicted-DDFs.
['Yipeng Hu', 'Dean Barratt', 'Matt Clarkson', 'Caroline Moore', 'Vasilis Stavrinides', 'Nooshin Ghavami', 'Francesco Giganti', 'Yunguan Fu', 'Tom Vercauteren', 'Qianye Yang']
2021-01-16
null
null
null
null
['holdout-set']
['computer-vision']
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[14.41563892364502, -2.530344009399414]
4f5205e8-6812-45a7-a6c7-ec76fa6a0a7e
correspondence-learning-via-linearly
2010.13136
null
https://arxiv.org/abs/2010.13136v1
https://arxiv.org/pdf/2010.13136v1.pdf
Correspondence Learning via Linearly-invariant Embedding
In this paper, we propose a fully differentiable pipeline for estimating accurate dense correspondences between 3D point clouds. The proposed pipeline is an extension and a generalization of the functional maps framework. However, instead of using the Laplace-Beltrami eigenfunctions as done in virtually all previous works in this domain, we demonstrate that learning the basis from data can both improve robustness and lead to better accuracy in challenging settings. We interpret the basis as a learned embedding into a higher dimensional space. Following the functional map paradigm the optimal transformation in this embedding space must be linear and we propose a separate architecture aimed at estimating the transformation by learning optimal descriptor functions. This leads to the first end-to-end trainable functional map-based correspondence approach in which both the basis and the descriptors are learned from data. Interestingly, we also observe that learning a \emph{canonical} embedding leads to worse results, suggesting that leaving an extra linear degree of freedom to the embedding network gives it more robustness, thereby also shedding light onto the success of previous methods. Finally, we demonstrate that our approach achieves state-of-the-art results in challenging non-rigid 3D point cloud correspondence applications.
['Maks Ovsjanikov', 'Simone Melzi', 'Marie-Julie Rakotosaona', 'Riccardo Marin']
2020-10-25
null
http://proceedings.neurips.cc/paper/2020/hash/11953163dd7fb12669b41a48f78a29b6-Abstract.html
http://proceedings.neurips.cc/paper/2020/file/11953163dd7fb12669b41a48f78a29b6-Paper.pdf
neurips-2020-12
['3d-dense-shape-correspondence']
['computer-vision']
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[8.214181900024414, -3.181184768676758]
666d2faf-24d0-4791-b325-a8268c35deda
kprnet-improving-projection-based-lidar
2007.12668
null
https://arxiv.org/abs/2007.12668v2
https://arxiv.org/pdf/2007.12668v2.pdf
KPRNet: Improving projection-based LiDAR semantic segmentation
Semantic segmentation is an important component in the perception systems of autonomous vehicles. In this work, we adopt recent advances in both image and point cloud segmentation to achieve a better accuracy in the task of segmenting LiDAR scans. KPRNet improves the convolutional neural network architecture of 2D projection methods and utilizes KPConv to replace the commonly used post-processing techniques with a learnable point-wise component which allows us to obtain more accurate 3D labels. With these improvements our model outperforms the current best method on the SemanticKITTI benchmark, reaching an mIoU of 63.1.
['Olaf Booij', 'Deyvid Kochanov', 'Fatemeh Karimi Nejadasl']
2020-07-24
null
null
null
null
['lidar-semantic-segmentation']
['computer-vision']
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[8.07308578491211, -2.830575704574585]
94d0ffed-0a21-403b-a3b7-c4dd0cb1b88a
a-new-pattern-recognition-method-for
null
null
http://dx.doi.org/10.4236/jbise.2014.710081
https://pdfs.semanticscholar.org/7fcb/6e4f06394bfc671165946dadb5b9b80add38.pdf
A New Pattern Recognition Method for Detection and Localization of Myocardial Infarction Using T-Wave Integral and Total Integral as Extracted Features from One Cycle of ECG Signal
In this paper we used two new features i.e. T-wave integral and total integral as extracted feature from one cycle of normal and patient ECG signals to detection and localization of myocardial infarction (MI) in left ventricle of heart. In our previous work we used some features of body surface potential map data for this aim. But we know the standard ECG is more popular, so we focused our detection and localization of MI on standard ECG. We use the T-wave integral because this feature is important impression of T-wave in MI. The second feature in this research is total integral of one ECG cycle, because we believe that the MI affects the morphology of the ECG signal which leads to total integral changes. We used some pattern recognition method such as Artificial Neural Network (ANN) to detect and localize the MI, because this method has very good accuracy for classification of normal signal and abnormal signal. We used one type of Radial Basis Function (RBF) that called Probabilistic Neural Network (PNN) because of its nonlinearity property, and used other classifier such as k-Nearest Neighbors (KNN), Multilayer Perceptron (MLP) and Naive Bayes Classification. We used PhysioNet database as our training and test data. We reached over 76% for accuracy in test data for localization and over 94% for detection of MI. Main advantages of our method are simplicity and its good accuracy. Also we can improve the accuracy of classification by adding more features in this method. A simple method based on using only two features which were extracted from standard ECG is presented and has good accuracy in MI localization.
['Naser Safdarian', 'Gholamreza Attarodi', 'Nader Jafarnia Dabanloo']
2014-08-01
null
null
null
jbise-vol7-no10-august-2014-2014-8
['myocardial-infarction-detection']
['medical']
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[14.186064720153809, 3.221101760864258]
5d1c9287-cf14-4311-b9ce-e8ba585b3bbb
microstructural-segmentation-using-a-union-of
null
null
https://www.nature.com/articles/s41598-023-32318-9#Abs1
https://www.nature.com/articles/s41598-023-32318-9
Microstructural segmentation using a union of attention guided U-Net models with different color transformed images
Metallographic images or often called the microstructures contain important information about metals, such as strength, toughness, ductility, corrosion resistance, which are used to choose the proper materials for various engineering applications. Thus by understanding the microstructures, one can determine the behaviour of a component made of a particular metal, and can predict the failure of that component in certain conditions. Image segmentation is a powerful technique for determination of morphological features of the microstructure like volume fraction, inclusion morphology, void, and crystal orientations. These are some key factors for determining the physical properties of metal. Therefore, automatic micro-structure characterization using image processing is useful for industrial applications which currently adopts deep learning-based segmentation models. In this paper, we propose a metallographic image segmentation method using an ensemble of modified U-Nets. Three U-Net models having the same architecture are separately fed with color transformed imaged (RGB, HSV and YUV). We improvise the U-Net with dilated convolutions and attention mechanisms to get finer grained features. Then we apply the sum-rule-based ensemble method on the outcomes of U-Net models to get the final prediction mask. We achieve the mean intersection over union (IoU) score of 0.677 on a publicly available standard dataset, namely MetalDAM. We also show that the proposed method obtains results comparable to state-of-the-art methods with fewer number of model parameters. The source code of the proposed work can be found at https://github.com/mb16biswas/attention-unet.
['Ram Sarkar', 'Dmitry Kaplun', 'Aleksandr Sinitca', 'Shibaprasad Sen', 'Rishav Pramanik', 'Momojit Biswas']
2023-04-07
null
null
null
scientific-reports-2023-4
['2d-semantic-segmentation']
['computer-vision']
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[7.502292156219482, 1.8192315101623535]
b7635af1-d4f7-4160-aac0-ce643d836bcb
mimetics-towards-understanding-human-actions
1912.07249
null
https://arxiv.org/abs/1912.07249v3
https://arxiv.org/pdf/1912.07249v3.pdf
Mimetics: Towards Understanding Human Actions Out of Context
Recent methods for video action recognition have reached outstanding performances on existing benchmarks. However, they tend to leverage context such as scenes or objects instead of focusing on understanding the human action itself. For instance, a tennis field leads to the prediction playing tennis irrespectively of the actions performed in the video. In contrast, humans have a more complete understanding of actions and can recognize them without context. The best example of out-of-context actions are mimes, that people can typically recognize despite missing relevant objects and scenes. In this paper, we propose to benchmark action recognition methods in such absence of context and introduce a novel dataset, Mimetics, consisting of mimed actions for a subset of 50 classes from the Kinetics benchmark. Our experiments show that (a) state-of-the-art 3D convolutional neural networks obtain disappointing results on such videos, highlighting the lack of true understanding of the human actions and (b) models leveraging body language via human pose are less prone to context biases. In particular, we show that applying a shallow neural network with a single temporal convolution over body pose features transferred to the action recognition problem performs surprisingly well compared to 3D action recognition methods.
['Grégory Rogez', 'Philippe Weinzaepfel']
2019-12-16
null
null
null
null
['3d-human-action-recognition']
['computer-vision']
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[8.163435935974121, 0.4954693019390106]
d113bae8-59a9-4834-880a-c7fd0e1f42c6
compressing-deep-neural-networks-via-layer
2007.14917
null
https://arxiv.org/abs/2007.14917v1
https://arxiv.org/pdf/2007.14917v1.pdf
Compressing Deep Neural Networks via Layer Fusion
This paper proposes \textit{layer fusion} - a model compression technique that discovers which weights to combine and then fuses weights of similar fully-connected, convolutional and attention layers. Layer fusion can significantly reduce the number of layers of the original network with little additional computation overhead, while maintaining competitive performance. From experiments on CIFAR-10, we find that various deep convolution neural networks can remain within 2\% accuracy points of the original networks up to a compression ratio of 3.33 when iteratively retrained with layer fusion. For experiments on the WikiText-2 language modelling dataset where pretrained transformer models are used, we achieve compression that leads to a network that is 20\% of its original size while being within 5 perplexity points of the original network. We also find that other well-established compression techniques can achieve competitive performance when compared to their original networks given a sufficient number of retraining steps. Generally, we observe a clear inflection point in performance as the amount of compression increases, suggesting a bound on the amount of compression that can be achieved before an exponential degradation in performance.
["James O' Neill", 'Aram Galstyan', 'Greg Ver Steeg']
2020-07-29
null
null
null
null
['exponential-degradation']
['time-series']
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[8.597057342529297, 3.2147228717803955]
d30b7c6e-0647-4a2a-89a2-0ab6a8873afd
on-games-and-simulators-as-a-platform-for
2110.11305
null
https://arxiv.org/abs/2110.11305v1
https://arxiv.org/pdf/2110.11305v1.pdf
On games and simulators as a platform for development of artificial intelligence for command and control
Games and simulators can be a valuable platform to execute complex multi-agent, multiplayer, imperfect information scenarios with significant parallels to military applications: multiple participants manage resources and make decisions that command assets to secure specific areas of a map or neutralize opposing forces. These characteristics have attracted the artificial intelligence (AI) community by supporting development of algorithms with complex benchmarks and the capability to rapidly iterate over new ideas. The success of artificial intelligence algorithms in real-time strategy games such as StarCraft II have also attracted the attention of the military research community aiming to explore similar techniques in military counterpart scenarios. Aiming to bridge the connection between games and military applications, this work discusses past and current efforts on how games and simulators, together with the artificial intelligence algorithms, have been adapted to simulate certain aspects of military missions and how they might impact the future battlefield. This paper also investigates how advances in virtual reality and visual augmentation systems open new possibilities in human interfaces with gaming platforms and their military parallels.
['Alexander Kott', 'Priya Narayanan', 'Theron Trout', 'Mark Dennison', 'Anne Logie', 'Manuel Vindiola', 'John Richardson', 'Mark Mittrick', 'Song Jun Park', 'Derrik E. Asher', 'Nicholas Waytowich', 'Vinicius G. Goecks']
2021-10-21
null
null
null
null
['real-time-strategy-games']
['playing-games']
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[3.5176894664764404, 1.5237020254135132]
4f75808b-90cc-4c76-92a4-8b9b1ffc261e
rethinking-range-view-representation-for
2303.05367
null
https://arxiv.org/abs/2303.05367v2
https://arxiv.org/pdf/2303.05367v2.pdf
Rethinking Range View Representation for LiDAR Segmentation
LiDAR segmentation is crucial for autonomous driving perception. Recent trends favor point- or voxel-based methods as they often yield better performance than the traditional range view representation. In this work, we unveil several key factors in building powerful range view models. We observe that the "many-to-one" mapping, semantic incoherence, and shape deformation are possible impediments against effective learning from range view projections. We present RangeFormer -- a full-cycle framework comprising novel designs across network architecture, data augmentation, and post-processing -- that better handles the learning and processing of LiDAR point clouds from the range view. We further introduce a Scalable Training from Range view (STR) strategy that trains on arbitrary low-resolution 2D range images, while still maintaining satisfactory 3D segmentation accuracy. We show that, for the first time, a range view method is able to surpass the point, voxel, and multi-view fusion counterparts in the competing LiDAR semantic and panoptic segmentation benchmarks, i.e., SemanticKITTI, nuScenes, and ScribbleKITTI.
['Ziwei Liu', 'Yu Qiao', 'Yuenan Hou', 'Yikang Li', 'Xinge Zhu', 'Yuexin Ma', 'Runnan Chen', 'Youquan Liu', 'Lingdong Kong']
2023-03-09
null
null
null
null
['panoptic-segmentation', 'lidar-semantic-segmentation']
['computer-vision', 'computer-vision']
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[8.184155464172363, -2.814225196838379]
f844b8fe-eac5-4f01-b145-ea5b082d95bb
what-if-we-only-use-real-datasets-for-scene
2103.04400
null
https://arxiv.org/abs/2103.04400v2
https://arxiv.org/pdf/2103.04400v2.pdf
What If We Only Use Real Datasets for Scene Text Recognition? Toward Scene Text Recognition With Fewer Labels
Scene text recognition (STR) task has a common practice: All state-of-the-art STR models are trained on large synthetic data. In contrast to this practice, training STR models only on fewer real labels (STR with fewer labels) is important when we have to train STR models without synthetic data: for handwritten or artistic texts that are difficult to generate synthetically and for languages other than English for which we do not always have synthetic data. However, there has been implicit common knowledge that training STR models on real data is nearly impossible because real data is insufficient. We consider that this common knowledge has obstructed the study of STR with fewer labels. In this work, we would like to reactivate STR with fewer labels by disproving the common knowledge. We consolidate recently accumulated public real data and show that we can train STR models satisfactorily only with real labeled data. Subsequently, we find simple data augmentation to fully exploit real data. Furthermore, we improve the models by collecting unlabeled data and introducing semi- and self-supervised methods. As a result, we obtain a competitive model to state-of-the-art methods. To the best of our knowledge, this is the first study that 1) shows sufficient performance by only using real labels and 2) introduces semi- and self-supervised methods into STR with fewer labels. Our code and data are available: https://github.com/ku21fan/STR-Fewer-Labels
['Kiyoharu Aizawa', 'Yusuke Matsui', 'Jeonghun Baek']
2021-03-07
null
http://openaccess.thecvf.com//content/CVPR2021/html/Baek_What_if_We_Only_Use_Real_Datasets_for_Scene_Text_CVPR_2021_paper.html
http://openaccess.thecvf.com//content/CVPR2021/papers/Baek_What_if_We_Only_Use_Real_Datasets_for_Scene_Text_CVPR_2021_paper.pdf
cvpr-2021-1
['scene-text-recognition']
['computer-vision']
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[11.646038055419922, 1.9566041231155396]
c5db257a-37be-478b-babe-afca75494523
vandermonde-trajectory-bounds-for-linear
2302.10995
null
https://arxiv.org/abs/2302.10995v1
https://arxiv.org/pdf/2302.10995v1.pdf
Vandermonde Trajectory Bounds for Linear Companion Systems
Fast and accurate safety assessment and collision checking are essential for motion planning and control of highly dynamic autonomous robotic systems. Informative, intuitive, and explicit motion trajectory bounds enable explainable and time-critical safety verification of autonomous robot motion. In this paper, we consider feedback linearization of nonlinear systems in the form of proportional-and-higher-order-derivative (PhD) control corresponding to companion dynamics. We introduce a novel analytic convex trajectory bound, called $\textit{Vandermonde simplex}$, for high-order companion systems, that is given by the convex hull of a finite weighted combination of system position, velocity, and other relevant higher-order state variables. Our construction of Vandermonde simplexes is built based on expressing the solution trajectory of companion dynamics in a newly introduced family of $\textit{Vandermonde basis functions}$ that offer new insights for understanding companion system motion compared to the classical exponential basis functions. In numerical simulations, we demonstrate that Vandermonde simplexes offer significantly more accurate motion prediction (e.g., at least an order of magnitude improvement in estimated motion volume) for describing the motion trajectory of companion systems compared to the standard invariant Lyapunov ellipsoids as well as exponential simplexes built based on exponential basis functions.
['Aykut İşleyen', 'Ömür Arslan']
2023-02-21
null
null
null
null
['motion-prediction', 'motion-planning']
['computer-vision', 'robots']
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[5.140517711639404, 2.1776010990142822]
4c4fdb7e-1f7b-44a2-ac56-c0c4f75930e9
on-the-global-convergence-of-risk-averse
2301.10932
null
https://arxiv.org/abs/2301.10932v2
https://arxiv.org/pdf/2301.10932v2.pdf
On the Global Convergence of Risk-Averse Policy Gradient Methods with Expected Conditional Risk Measures
Risk-sensitive reinforcement learning (RL) has become a popular tool to control the risk of uncertain outcomes and ensure reliable performance in various sequential decision-making problems. While policy gradient methods have been developed for risk-sensitive RL, it remains unclear if these methods enjoy the same global convergence guarantees as in the risk-neutral case. In this paper, we consider a class of dynamic time-consistent risk measures, called Expected Conditional Risk Measures (ECRMs), and derive policy gradient updates for ECRM-based objective functions. Under both constrained direct parameterization and unconstrained softmax parameterization, we provide global convergence and iteration complexities of the corresponding risk-averse policy gradient algorithms. We further test risk-averse variants of REINFORCE and actor-critic algorithms to demonstrate the efficacy of our method and the importance of risk control.
['Lei Ying', 'Xian Yu']
2023-01-26
null
null
null
null
['policy-gradient-methods']
['methodology']
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[4.244218826293945, 2.5323643684387207]
56be8afb-5cdc-42f7-85d3-b0c4565dce01
open-problems-in-applied-deep-learning
2301.11316
null
https://arxiv.org/abs/2301.11316v1
https://arxiv.org/pdf/2301.11316v1.pdf
Open Problems in Applied Deep Learning
This work formulates the machine learning mechanism as a bi-level optimization problem. The inner level optimization loop entails minimizing a properly chosen loss function evaluated on the training data. This is nothing but the well-studied training process in pursuit of optimal model parameters. The outer level optimization loop is less well-studied and involves maximizing a properly chosen performance metric evaluated on the validation data. This is what we call the "iteration process", pursuing optimal model hyper-parameters. Among many other degrees of freedom, this process entails model engineering (e.g., neural network architecture design) and management, experiment tracking, dataset versioning and augmentation. The iteration process could be automated via Automatic Machine Learning (AutoML) or left to the intuitions of machine learning students, engineers, and researchers. Regardless of the route we take, there is a need to reduce the computational cost of the iteration step and as a direct consequence reduce the carbon footprint of developing artificial intelligence algorithms. Despite the clean and unified mathematical formulation of the iteration step as a bi-level optimization problem, its solutions are case specific and complex. This work will consider such cases while increasing the level of complexity from supervised learning to semi-supervised, self-supervised, unsupervised, few-shot, federated, reinforcement, and physics-informed learning. As a consequence of this exercise, this proposal surfaces a plethora of open problems in the field, many of which can be addressed in parallel.
['Maziar Raissi']
2023-01-26
null
null
null
null
['automl']
['methodology']
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[6.23753547668457, 3.8093063831329346]
c6612749-4e19-4e27-a981-55f7809cf4b9
scene-change-detection-using-multiscale
2212.10417
null
https://arxiv.org/abs/2212.10417v1
https://arxiv.org/pdf/2212.10417v1.pdf
Scene Change Detection Using Multiscale Cascade Residual Convolutional Neural Networks
Scene change detection is an image processing problem related to partitioning pixels of a digital image into foreground and background regions. Mostly, visual knowledge-based computer intelligent systems, like traffic monitoring, video surveillance, and anomaly detection, need to use change detection techniques. Amongst the most prominent detection methods, there are the learning-based ones, which besides sharing similar training and testing protocols, differ from each other in terms of their architecture design strategies. Such architecture design directly impacts on the quality of the detection results, and also in the device resources capacity, like memory. In this work, we propose a novel Multiscale Cascade Residual Convolutional Neural Network that integrates multiscale processing strategy through a Residual Processing Module, with a Segmentation Convolutional Neural Network. Experiments conducted on two different datasets support the effectiveness of the proposed approach, achieving average overall $\boldsymbol{F\text{-}measure}$ results of $\boldsymbol{0.9622}$ and $\boldsymbol{0.9664}$ over Change Detection 2014 and PetrobrasROUTES datasets respectively, besides comprising approximately eight times fewer parameters. Such obtained results place the proposed technique amongst the top four state-of-the-art scene change detection methods.
['João P. Papa', 'Danilo Colombo', 'Rafael G. Pires', 'Daniel F. S. Santos']
2022-12-20
null
null
null
null
['scene-change-detection', 'change-detection']
['computer-vision', 'computer-vision']
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[8.75394344329834, -0.6865972280502319]
4a5d1c3f-7055-4ea0-9b1c-deaa8eeabcf7
atlantanet-inferring-the-3d-indoor-layout
null
null
https://www.ecva.net/papers/eccv_2020/papers_ECCV/html/604_ECCV_2020_paper.php
https://www.ecva.net/papers/eccv_2020/papers_ECCV/papers/123530426.pdf
AtlantaNet: Inferring the 3D Indoor Layout from a Single 360(∘) Image beyond the Manhattan World Assumption
We introduce a novel end-to-end approach to predict a 3D room layout from a single panoramic image. Compared to recent state-of-the-art works, our method is not limited to Manhattan World environments, and can reconstruct rooms bounded by vertical walls that do not form right angles or are curved -- i.e., Atlanta World models. In our approach, we project the original gravity-aligned panoramic image on two horizontal planes, one above and one below the camera. This representation encodes all the information needed to recover the Atlanta World 3D bounding surfaces of the room in the form of a 2D room footprint on the floor plan and a room height. To predict the 3D layout, we propose an encoder-decoder neural network architecture, leveraging Recurrent Neural Networks (RNNs) to capture long-range geometric patterns, and exploiting a customized training strategy based on domain-specific knowledge. The experimental results demonstrate that our method outperforms state-of-the-art solutions in prediction accuracy, in particular in cases of complex wall layouts or curved wall footprints.
['Marco Agus', 'Giovanni Pintore', 'Enrico Gobbetti']
null
null
null
null
eccv-2020-8
['3d-room-layouts-from-a-single-rgb-panorama']
['computer-vision']
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[8.719344139099121, -2.866748809814453]
7852e464-8891-4e16-8227-9dd42e4a38ac
amrita-lt-edi-eacl2021-hope-speech-detection
null
null
https://aclanthology.org/2021.ltedi-1.22
https://aclanthology.org/2021.ltedi-1.22.pdf
Amrita@LT-EDI-EACL2021: Hope Speech Detection on Multilingual Text
Analysis and deciphering code-mixed data is imperative in academia and industry, in a multilingual country like India, in order to solve problems apropos Natural Language Processing. This paper proposes a bidirectional long short-term memory (BiLSTM) with the attention-based approach, in solving the hope speech detection problem. Using this approach an F1-score of 0.73 (9thrank) in the Malayalam-English data set was achieved from a total of 31 teams who participated in the competition.
['Kothamasu Sai rahul', 'Ravi teja Tasubilli', 'Thara S']
null
null
null
null
eacl-ltedi-2021-4
['hope-speech-detection']
['natural-language-processing']
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[14.172866821289062, 6.728785037994385]
b252ae6d-758d-402a-921c-cc3c934795c5
diverse-audio-captioning-via-adversarial
2110.06691
null
https://arxiv.org/abs/2110.06691v2
https://arxiv.org/pdf/2110.06691v2.pdf
Diverse Audio Captioning via Adversarial Training
Audio captioning aims at generating natural language descriptions for audio clips automatically. Existing audio captioning models have shown promising improvement in recent years. However, these models are mostly trained via maximum likelihood estimation (MLE),which tends to make captions generic, simple and deterministic. As different people may describe an audio clip from different aspects using distinct words and grammars, we argue that an audio captioning system should have the ability to generate diverse captions for a fixed audio clip and across similar audio clips. To address this problem, we propose an adversarial training framework for audio captioning based on a conditional generative adversarial network (C-GAN), which aims at improving the naturalness and diversity of generated captions. Unlike processing data of continuous values in a classical GAN, a sentence is composed of discrete tokens and the discrete sampling process is non-differentiable. To address this issue, policy gradient, a reinforcement learning technique, is used to back-propagate the reward to the generator. The results show that our proposed model can generate more diverse captions, as compared to state-of-the-art methods.
['Wenwu Wang', 'Mark D. Plumbley', 'Jianyuan Sun', 'Xubo Liu', 'Xinhao Mei']
2021-10-13
null
null
null
null
['audio-captioning']
['audio']
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[15.271735191345215, 4.922688961029053]
9eaf10ac-5630-47c2-91c8-a01261371c87
deep-lifelong-cross-modal-hashing
2304.13357
null
https://arxiv.org/abs/2304.13357v1
https://arxiv.org/pdf/2304.13357v1.pdf
Deep Lifelong Cross-modal Hashing
Hashing methods have made significant progress in cross-modal retrieval tasks with fast query speed and low storage cost. Among them, deep learning-based hashing achieves better performance on large-scale data due to its excellent extraction and representation ability for nonlinear heterogeneous features. However, there are still two main challenges in catastrophic forgetting when data with new categories arrive continuously, and time-consuming for non-continuous hashing retrieval to retrain for updating. To this end, we, in this paper, propose a novel deep lifelong cross-modal hashing to achieve lifelong hashing retrieval instead of re-training hash function repeatedly when new data arrive. Specifically, we design lifelong learning strategy to update hash functions by directly training the incremental data instead of retraining new hash functions using all the accumulated data, which significantly reduce training time. Then, we propose lifelong hashing loss to enable original hash codes participate in lifelong learning but remain invariant, and further preserve the similarity and dis-similarity among original and incremental hash codes to maintain performance. Additionally, considering distribution heterogeneity when new data arriving continuously, we introduce multi-label semantic similarity to supervise hash learning, and it has been proven that the similarity improves performance with detailed analysis. Experimental results on benchmark datasets show that the proposed methods achieves comparative performance comparing with recent state-of-the-art cross-modal hashing methods, and it yields substantial average increments over 20\% in retrieval accuracy and almost reduces over 80\% training time when new data arrives continuously.
['Jiancheng Lv', 'Weisheng Li', 'Bochuan Zheng', 'Hanqi Li', 'Liming Xu']
2023-04-26
null
null
null
null
['semantic-textual-similarity', 'semantic-similarity']
['natural-language-processing', 'natural-language-processing']
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[11.299572944641113, 0.9745357036590576]
b7519900-b823-4dc8-9f1b-271d3917a394
knowledge-extraction-from-texts-based-on
null
null
https://aclanthology.org/2022.naacl-industry.33
https://aclanthology.org/2022.naacl-industry.33.pdf
Knowledge Extraction From Texts Based on Wikidata
This paper presents an effort within our company of developing knowledge extraction pipeline for English, which can be further used for constructing an entreprise-specific knowledge base. We present a system consisting of entity detection and linking, coreference resolution, and relation extraction based on the Wikidata schema. We highlight existing challenges of knowledge extraction by evaluating the deployed pipeline on real-world data. We also make available a database, which can serve as a new resource for sentential relation extraction, and we underline the importance of having balanced data for training classification models.
['Frédéric Herledan', 'Johannes Heinecke', 'Anastasia Shimorina']
null
null
null
null
naacl-acl-2022-7
['coreference-resolution']
['natural-language-processing']
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[9.345810890197754, 8.725204467773438]
23b10eeb-cfe7-4efc-92b6-3574522f0cfa
graphsha-synthesizing-harder-samples-for
2306.09612
null
https://arxiv.org/abs/2306.09612v1
https://arxiv.org/pdf/2306.09612v1.pdf
GraphSHA: Synthesizing Harder Samples for Class-Imbalanced Node Classification
Class imbalance is the phenomenon that some classes have much fewer instances than others, which is ubiquitous in real-world graph-structured scenarios. Recent studies find that off-the-shelf Graph Neural Networks (GNNs) would under-represent minor class samples. We investigate this phenomenon and discover that the subspaces of minor classes being squeezed by those of the major ones in the latent space is the main cause of this failure. We are naturally inspired to enlarge the decision boundaries of minor classes and propose a general framework GraphSHA by Synthesizing HArder minor samples. Furthermore, to avoid the enlarged minor boundary violating the subspaces of neighbor classes, we also propose a module called SemiMixup to transmit enlarged boundary information to the interior of the minor classes while blocking information propagation from minor classes to neighbor classes. Empirically, GraphSHA shows its effectiveness in enlarging the decision boundaries of minor classes, as it outperforms various baseline methods in class-imbalanced node classification with different GNN backbone encoders over seven public benchmark datasets. Code is avilable at https://github.com/wenzhilics/GraphSHA.
['Jian-Huang Lai', 'Hui Xiong', 'Chang-Dong Wang', 'Wen-Zhi Li']
2023-06-16
null
null
null
null
['node-classification', 'blocking']
['graphs', 'natural-language-processing']
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[7.315227508544922, 5.999572277069092]
15993325-1032-4f7f-942c-5df6f3e50893
ai-bind-improving-binding-predictions-for
2112.13168
null
https://arxiv.org/abs/2112.13168v5
https://arxiv.org/pdf/2112.13168v5.pdf
AI-Bind: Improving Binding Predictions for Novel Protein Targets and Ligands
Identifying novel drug-target interactions (DTI) is a critical and rate limiting step in drug discovery. While deep learning models have been proposed to accelerate the identification process, we show that state-of-the-art models fail to generalize to novel (i.e., never-before-seen) structures. We first unveil the mechanisms responsible for this shortcoming, demonstrating how models rely on shortcuts that leverage the topology of the protein-ligand bipartite network, rather than learning the node features. Then, we introduce AI-Bind, a pipeline that combines network-based sampling strategies with unsupervised pre-training, allowing us to limit the annotation imbalance and improve binding predictions for novel proteins and ligands. We illustrate the value of AI-Bind by predicting drugs and natural compounds with binding affinity to SARS-CoV-2 viral proteins and the associated human proteins. We also validate these predictions via docking simulations and comparison with recent experimental evidence, and step up the process of interpreting machine learning prediction of protein-ligand binding by identifying potential active binding sites on the amino acid sequence. Overall, AI-Bind offers a powerful high-throughput approach to identify drug-target combinations, with the potential of becoming a powerful tool in drug discovery.
['Michael Sebek', 'Omair Shafi Ahmed', 'Zohair Shafi', 'Robin Walters', 'Giulia Menichetti', 'Albert-László Barabási', 'Tina Eliassi-Rad', 'Rose Yu', 'Deisy Gysi', 'Ayan Chatterjee']
2021-12-25
null
null
null
null
['unsupervised-pre-training']
['methodology']
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[4.949052810668945, 5.664579391479492]
7d11fbb5-8350-4fe1-8b3c-701c392d2a3a
a-two-stage-method-for-text-line-detection-in
1802.03345
null
https://arxiv.org/abs/1802.03345v2
https://arxiv.org/pdf/1802.03345v2.pdf
A Two-Stage Method for Text Line Detection in Historical Documents
This work presents a two-stage text line detection method for historical documents. Each detected text line is represented by its baseline. In a first stage, a deep neural network called ARU-Net labels pixels to belong to one of the three classes: baseline, separator or other. The separator class marks beginning and end of each text line. The ARU-Net is trainable from scratch with manageably few manually annotated example images (less than 50). This is achieved by utilizing data augmentation strategies. The network predictions are used as input for the second stage which performs a bottom-up clustering to build baselines. The developed method is capable of handling complex layouts as well as curved and arbitrarily oriented text lines. It substantially outperforms current state-of-the-art approaches. For example, for the complex track of the cBAD: ICDAR2017 Competition on Baseline Detection the F-value is increased from 0.859 to 0.922. The framework to train and run the ARU-Net is open source.
['Tobias Strauß', 'Gundram Leifert', 'Tobias Grüning', 'Johannes Michael', 'Roger Labahn']
2018-02-09
null
null
null
null
['line-detection']
['computer-vision']
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[11.825384140014648, 2.5458343029022217]
f25b57fc-cbb7-4f0e-9666-14ba4d8ac517
clearing-the-skies-a-deep-network
1609.02087
null
http://arxiv.org/abs/1609.02087v2
http://arxiv.org/pdf/1609.02087v2.pdf
Clearing the Skies: A deep network architecture for single-image rain removal
We introduce a deep network architecture called DerainNet for removing rain streaks from an image. Based on the deep convolutional neural network (CNN), we directly learn the mapping relationship between rainy and clean image detail layers from data. Because we do not possess the ground truth corresponding to real-world rainy images, we synthesize images with rain for training. In contrast to other common strategies that increase depth or breadth of the network, we use image processing domain knowledge to modify the objective function and improve deraining with a modestly-sized CNN. Specifically, we train our DerainNet on the detail (high-pass) layer rather than in the image domain. Though DerainNet is trained on synthetic data, we find that the learned network translates very effectively to real-world images for testing. Moreover, we augment the CNN framework with image enhancement to improve the visual results. Compared with state-of-the-art single image de-raining methods, our method has improved rain removal and much faster computation time after network training.
['Jia-Bin Huang', 'Xueyang Fu', 'Xinghao Ding', 'Yinghao Liao', 'John Paisley']
2016-09-07
null
null
null
null
['single-image-deraining']
['computer-vision']
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[10.918107986450195, -3.2303073406219482]
ef65e7c5-41db-4e0f-b1ed-be3e8dd3a36c
increasing-performance-and-sample-efficiency
2306.16431
null
https://arxiv.org/abs/2306.16431v1
https://arxiv.org/pdf/2306.16431v1.pdf
Increasing Performance And Sample Efficiency With Model-agnostic Interactive Feature Attributions
Model-agnostic feature attributions can provide local insights in complex ML models. If the explanation is correct, a domain expert can validate and trust the model's decision. However, if it contradicts the expert's knowledge, related work only corrects irrelevant features to improve the model. To allow for unlimited interaction, in this paper we provide model-agnostic implementations for two popular explanation methods (Occlusion and Shapley values) to enforce entirely different attributions in the complex model. For a particular set of samples, we use the corrected feature attributions to generate extra local data, which is used to retrain the model to have the right explanation for the samples. Through simulated and real data experiments on a variety of models we show how our proposed approach can significantly improve the model's performance only by augmenting its training dataset based on corrected explanations. Adding our interactive explanations to active learning settings increases the sample efficiency significantly and outperforms existing explanatory interactive strategies. Additionally we explore how a domain expert can provide feature attributions which are sufficiently correct to improve the model.
['Johan Suykens', 'Maarten De Vos', 'Joran Michiels']
2023-06-28
null
null
null
null
['active-learning', 'active-learning']
['methodology', 'natural-language-processing']
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[8.83051586151123, 5.723832607269287]
cf6fbabf-7d37-4a80-a864-57950c9a7701
more-behind-your-electricity-bill-a-dual-dnn
2106.00297
null
https://arxiv.org/abs/2106.00297v1
https://arxiv.org/pdf/2106.00297v1.pdf
More Behind Your Electricity Bill: a Dual-DNN Approach to Non-Intrusive Load Monitoring
Non-intrusive load monitoring (NILM) is a well-known single-channel blind source separation problem that aims to decompose the household energy consumption into itemised energy usage of individual appliances. In this way, considerable energy savings could be achieved by enhancing household's awareness of energy usage. Recent investigations have shown that deep neural networks (DNNs) based approaches are promising for the NILM task. Nevertheless, they normally ignore the inherent properties of appliance operations in the network design, potentially leading to implausible results. We are thus motivated to develop the dual Deep Neural Networks (dual-DNN), which aims to i) take advantage of DNNs' learning capability of latent features and ii) empower the DNN architecture with identification ability of universal properties. Specifically in the design of dual-DNN, we adopt one subnetwork to measure power ratings of different appliances' operation states, and the other subnetwork to identify the running states of target appliances. The final result is then obtained by multiplying these two network outputs and meanwhile considering the multi-state property of household appliances. To enforce the sparsity property in appliance's state operating, we employ median filtering and hard gating mechanisms to the subnetwork for state identification. Compared with the state-of-the-art NILM methods, our dual-DNN approach demonstrates a 21.67% performance improvement in average on two public benchmark datasets.
['Hong Xu', 'Yi Wang', 'Qianyi Huang', 'Guoming Tang', 'Yu Zhang']
2021-06-01
null
null
null
null
['non-intrusive-load-monitoring', 'non-intrusive-load-monitoring', 'non-intrusive-load-monitoring']
['knowledge-base', 'miscellaneous', 'time-series']
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[16.066070556640625, 7.580445766448975]
366b1dd5-0966-422b-9f5f-78c27e35344d
on-the-importance-of-signer-overlap-for-sign
2303.10782
null
https://arxiv.org/abs/2303.10782v1
https://arxiv.org/pdf/2303.10782v1.pdf
On the Importance of Signer Overlap for Sign Language Detection
Sign language detection, identifying if someone is signing or not, is becoming crucially important for its applications in remote conferencing software and for selecting useful sign data for training sign language recognition or translation tasks. We argue that the current benchmark data sets for sign language detection estimate overly positive results that do not generalize well due to signer overlap between train and test partitions. We quantify this with a detailed analysis of the effect of signer overlap on current sign detection benchmark data sets. Comparing accuracy with and without overlap on the DGS corpus and Signing in the Wild, we observed a relative decrease in accuracy of 4.17% and 6.27%, respectively. Furthermore, we propose new data set partitions that are free of overlap and allow for more realistic performance assessment. We hope this work will contribute to improving the accuracy and generalization of sign language detection systems.
['Oscar Koller', 'Alessandro Manzotti', 'Cyrine Chaabani', 'Stephan Huber', 'Abhilash Pal']
2023-03-19
null
null
null
null
['sign-language-recognition']
['computer-vision']
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[9.13172435760498, -6.446225643157959]
8fd1f449-c902-4785-9f01-a5bdd450125d
sparse-relational-reasoning-with-object
2207.07512
null
https://arxiv.org/abs/2207.07512v1
https://arxiv.org/pdf/2207.07512v1.pdf
Sparse Relational Reasoning with Object-Centric Representations
We investigate the composability of soft-rules learned by relational neural architectures when operating over object-centric (slot-based) representations, under a variety of sparsity-inducing constraints. We find that increasing sparsity, especially on features, improves the performance of some models and leads to simpler relations. Additionally, we observe that object-centric representations can be detrimental when not all objects are fully captured; a failure mode to which CNNs are less prone. These findings demonstrate the trade-offs between interpretability and performance, even for models designed to tackle relational tasks.
['Murray Shanahan', 'Alessandra Russo', 'Alex F. Spies']
2022-07-15
null
null
null
null
['relational-reasoning']
['natural-language-processing']
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[9.429798126220703, 7.048830986022949]
27c3c85d-e504-4a1c-a82f-be672f28bea5
spectral-analysis-network-for-deep
2009.05235
null
https://arxiv.org/abs/2009.05235v1
https://arxiv.org/pdf/2009.05235v1.pdf
Spectral Analysis Network for Deep Representation Learning and Image Clustering
Deep representation learning is a crucial procedure in multimedia analysis and attracts increasing attention. Most of the popular techniques rely on convolutional neural network and require a large amount of labeled data in the training procedure. However, it is time consuming or even impossible to obtain the label information in some tasks due to cost limitation. Thus, it is necessary to develop unsupervised deep representation learning techniques. This paper proposes a new network structure for unsupervised deep representation learning based on spectral analysis, which is a popular technique with solid theory foundations. Compared with the existing spectral analysis methods, the proposed network structure has at least three advantages. Firstly, it can identify the local similarities among images in patch level and thus more robust against occlusion. Secondly, through multiple consecutive spectral analysis procedures, the proposed network can learn more clustering-friendly representations and is capable to reveal the deep correlations among data samples. Thirdly, it can elegantly integrate different spectral analysis procedures, so that each spectral analysis procedure can have their individual strengths in dealing with different data sample distributions. Extensive experimental results show the effectiveness of the proposed methods on various image clustering tasks.
['Jinghua Wang', 'Jianmin Jiang', 'Adrian Hilton']
2020-09-11
null
null
null
null
['image-clustering']
['computer-vision']
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[9.088578224182129, 3.2151010036468506]
93870087-7d6f-4880-86d3-ca566fd329d5
deep-lexical-segmentation-and-syntactic
null
null
https://aclanthology.org/N16-1127
https://aclanthology.org/N16-1127.pdf
Deep Lexical Segmentation and Syntactic Parsing in the Easy-First Dependency Framework
null
['Matthieu Constant', 'Nadi Tomeh', 'Joseph Le Roux']
2016-06-01
null
null
null
naacl-2016-6
['lexical-analysis']
['natural-language-processing']
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[-7.445680141448975, 3.6778674125671387]
95a2f13b-1a47-4e97-99df-34a2447020fc
regression-transformer-concurrent-conditional
2202.01338
null
https://arxiv.org/abs/2202.01338v3
https://arxiv.org/pdf/2202.01338v3.pdf
Regression Transformer: Concurrent sequence regression and generation for molecular language modeling
Despite significant progress of generative models in the natural sciences, their controllability remains challenging. One fundamentally missing aspect of molecular or protein generative models is an inductive bias that can reflect continuous properties of interest. To that end, we propose the Regression Transformer (RT), a novel method that abstracts regression as a conditional sequence modeling problem. This introduces a new paradigm of multitask language models which seamlessly bridge sequence regression and conditional sequence generation. We thoroughly demonstrate that, despite using a nominal-scale training objective, the RT matches or surpasses the performance of conventional regression models in property prediction tasks of small molecules, proteins and chemical reactions. Critically, priming the same model with continuous properties yields a highly competitive conditional generative model that outperforms specialized approaches in a substructure-constrained, property-driven molecule generation benchmark. Our dichotomous approach is facilitated by a novel, alternating training scheme that enables the model to decorate seed sequences by desired properties, e.g., to optimize reaction yield. In sum, the RT is the first report of a multitask model that concurrently excels at predictive and generative tasks in biochemistry. This finds particular application in property-driven, local exploration of the chemical or protein space and could pave the road toward foundation models in material design. The code to reproduce all experiments of the paper is available at: https://github.com/IBM/regression-transformer
['Matteo Manica', 'Jannis Born']
2022-02-01
null
null
null
null
['conditional-text-generation']
['natural-language-processing']
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[4.710371017456055, 5.797785758972168]
a2cf4a70-9163-4ba7-a52c-3effe3b5f5f9
sparsealign-a-super-resolution-algorithm-for
2201.08706
null
https://arxiv.org/abs/2201.08706v1
https://arxiv.org/pdf/2201.08706v1.pdf
SparseAlign: A Super-Resolution Algorithm for Automatic Marker Localization and Deformation Estimation in Cryo-Electron Tomography
Tilt-series alignment is crucial to obtaining high-resolution reconstructions in cryo-electron tomography. Beam-induced local deformation of the sample is hard to estimate from the low-contrast sample alone, and often requires fiducial gold bead markers. The state-of-the-art approach for deformation estimation uses (semi-)manually labelled marker locations in projection data to fit the parameters of a polynomial deformation model. Manually-labelled marker locations are difficult to obtain when data are noisy or markers overlap in projection data. We propose an alternative mathematical approach for simultaneous marker localization and deformation estimation by extending a grid-free super-resolution algorithm first proposed in the context of single-molecule localization microscopy. Our approach does not require labelled marker locations; instead, we use an image-based loss where we compare the forward projection of markers with the observed data. We equip this marker localization scheme with an additional deformation estimation component and solve for a reduced number of deformation parameters. Using extensive numerical studies on marker-only samples, we show that our approach automatically finds markers and reliably estimates sample deformation without labelled marker data. We further demonstrate the applicability of our approach for a broad range of model mismatch scenarios, including experimental electron tomography data of gold markers on ice.
['K Joost Batenburg', 'Hermen Jan Hupkes', 'Erik Franken', 'Holger Kohr', 'Felix Lucka', 'Poulami Somanya Ganguly']
2022-01-21
null
null
null
null
['electron-tomography']
['medical']
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[13.188070297241211, -2.9690043926239014]
d853d8c6-54b1-4d66-9523-92efe2fc845e
metasci-scalable-and-adaptive-reconstruction
2103.01786
null
https://arxiv.org/abs/2103.01786v1
https://arxiv.org/pdf/2103.01786v1.pdf
MetaSCI: Scalable and Adaptive Reconstruction for Video Compressive Sensing
To capture high-speed videos using a two-dimensional detector, video snapshot compressive imaging (SCI) is a promising system, where the video frames are coded by different masks and then compressed to a snapshot measurement. Following this, efficient algorithms are desired to reconstruct the high-speed frames, where the state-of-the-art results are achieved by deep learning networks. However, these networks are usually trained for specific small-scale masks and often have high demands of training time and GPU memory, which are hence {\bf \em not flexible} to $i$) a new mask with the same size and $ii$) a larger-scale mask. We address these challenges by developing a Meta Modulated Convolutional Network for SCI reconstruction, dubbed MetaSCI. MetaSCI is composed of a shared backbone for different masks, and light-weight meta-modulation parameters to evolve to different modulation parameters for each mask, thus having the properties of {\bf \em fast adaptation} to new masks (or systems) and ready to {\bf \em scale to large data}. Extensive simulation and real data results demonstrate the superior performance of our proposed approach. Our code is available at {\small\url{https://github.com/xyvirtualgroup/MetaSCI-CVPR2021}}.
['Xin Yuan', 'Bo Chen', 'Ziheng Cheng', 'Hao Zhang', 'Zhengjue Wang']
2021-03-02
null
http://openaccess.thecvf.com//content/CVPR2021/html/Wang_MetaSCI_Scalable_and_Adaptive_Reconstruction_for_Video_Compressive_Sensing_CVPR_2021_paper.html
http://openaccess.thecvf.com//content/CVPR2021/papers/Wang_MetaSCI_Scalable_and_Adaptive_Reconstruction_for_Video_Compressive_Sensing_CVPR_2021_paper.pdf
cvpr-2021-1
['video-compressive-sensing']
['computer-vision']
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[11.071147918701172, -2.0255329608917236]
38d91348-31b1-4342-b691-3273d8bf556a
correlation-networks-for-extreme-multi-label
null
null
https://dl.acm.org/doi/pdf/10.1145/3394486.3403151
https://dl.acm.org/doi/pdf/10.1145/3394486.3403151
Correlation Networks for Extreme Multi-label Text Classification
This paper develops the Correlation Networks (CorNet) architecture for the extreme multi-label text classification (XMTC) task, where the objective is to tag an input text sequence with the most relevant subset of labels from an extremely large label set. XMTC can be found in many real-world applications, such as document tagging and product annotation. Recently, deep learning models have achieved outstanding performances in XMTC tasks. However, these deep XMTC models ignore the useful correlation information among different labels. CorNet addresses this limitation by adding an extra CorNet module at the prediction layer of a deep model, which is able to learn label correlations, enhance raw label predictions with correlation knowledge and output augmented label predictions. We show that CorNet can be easily integrated with deep XMTC models and generalize effectively across different datasets. We further demonstrate that CorNet can bring significant improvements over the existing deep XMTC models in terms of both performance and convergence rate. The models and datasets are available at https://github.com/XunGuangxu/CorNet.
['Aidong Zhang', 'Jianhui Sun', 'Kishlay Jha', 'Guangxu Xun']
2022-08-23
null
null
null
proceedings-of-the-26th-acm-sigkdd-1
['multi-label-text-classification', 'multi-label-text-classification']
['methodology', 'natural-language-processing']
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[9.619002342224121, 4.451057434082031]
5eb25b5a-b285-447a-95f5-a8698046a7b3
exploiting-neural-query-translation-into
2010.13659
null
https://arxiv.org/abs/2010.13659v1
https://arxiv.org/pdf/2010.13659v1.pdf
Exploiting Neural Query Translation into Cross Lingual Information Retrieval
As a crucial role in cross-language information retrieval (CLIR), query translation has three main challenges: 1) the adequacy of translation; 2) the lack of in-domain parallel training data; and 3) the requisite of low latency. To this end, existing CLIR systems mainly exploit statistical-based machine translation (SMT) rather than the advanced neural machine translation (NMT), limiting the further improvements on both translation and retrieval quality. In this paper, we investigate how to exploit neural query translation model into CLIR system. Specifically, we propose a novel data augmentation method that extracts query translation pairs according to user clickthrough data, thus to alleviate the problem of domain-adaptation in NMT. Then, we introduce an asynchronous strategy which is able to leverage the advantages of the real-time in SMT and the veracity in NMT. Experimental results reveal that the proposed approach yields better retrieval quality than strong baselines and can be well applied into a real-world CLIR system, i.e. Aliexpress e-Commerce search engine. Readers can examine and test their cases on our website: https://aliexpress.com .
['Boxing Chen', 'Weihua Luo', 'Haibo Zhang', 'Baosong Yang', 'Liang Yao']
2020-10-26
null
null
null
null
['cross-lingual-information-retrieval']
['natural-language-processing']
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[11.599230766296387, 10.040308952331543]
c49a6b4c-3916-42ff-983c-49c398114bd7
implicit-neural-networks-with-fourier-feature
2305.06822
null
https://arxiv.org/abs/2305.06822v1
https://arxiv.org/pdf/2305.06822v1.pdf
Implicit Neural Networks with Fourier-Feature Inputs for Free-breathing Cardiac MRI Reconstruction
In this paper, we propose an approach for cardiac magnetic resonance imaging (MRI), which aims to reconstruct a real-time video of a beating heart from continuous highly under-sampled measurements. This task is challenging since the object to be reconstructed (the heart) is continuously changing during signal acquisition. To address this challenge, we represent the beating heart with an implicit neural network and fit the network so that the representation of the heart is consistent with the measurements. The network in the form of a multi-layer perceptron with Fourier-feature inputs acts as an effective signal prior and enables adjusting the regularization strength in both the spatial and temporal dimensions of the signal. We examine the proposed approach for 2D free-breathing cardiac real-time MRI in different operating regimes, i.e., for different image resolutions, slice thicknesses, and acquisition lengths. Our method achieves reconstruction quality on par with or slightly better than state-of-the-art untrained convolutional neural networks and superior image quality compared to a recent method that fits an implicit representation directly to Fourier-domain measurements. However, this comes at a higher computational cost. Our approach does not require any additional patient data or biosensors including electrocardiography, making it potentially applicable in a wide range of clinical scenarios.
['Reinhard Heckel', 'Stefan Ruschke', 'Johannes F. Kunz']
2023-05-11
null
null
null
null
['mri-reconstruction']
['computer-vision']
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[13.57983112335205, -2.477501392364502]
d62488aa-f3d3-4e66-9772-9badbb9398dd
secure-multiparty-computation-for-synthetic
2210.07332
null
https://arxiv.org/abs/2210.07332v2
https://arxiv.org/pdf/2210.07332v2.pdf
Secure Multiparty Computation for Synthetic Data Generation from Distributed Data
Legal and ethical restrictions on accessing relevant data inhibit data science research in critical domains such as health, finance, and education. Synthetic data generation algorithms with privacy guarantees are emerging as a paradigm to break this data logjam. Existing approaches, however, assume that the data holders supply their raw data to a trusted curator, who uses it as fuel for synthetic data generation. This severely limits the applicability, as much of the valuable data in the world is locked up in silos, controlled by entities who cannot show their data to each other or a central aggregator without raising privacy concerns. To overcome this roadblock, we propose the first solution in which data holders only share encrypted data for differentially private synthetic data generation. Data holders send shares to servers who perform Secure Multiparty Computation (MPC) computations while the original data stays encrypted. We instantiate this idea in an MPC protocol for the Multiplicative Weights with Exponential Mechanism (MWEM) algorithm to generate synthetic data based on real data originating from many data holders without reliance on a single point of failure.
['Martine De Cock', 'Rafael T. de Sousa Jr.', 'Anderson Nascimento', 'Sikha Pentyala', 'Mayana Pereira']
2022-10-13
null
null
null
null
['synthetic-data-generation', 'synthetic-data-generation']
['medical', 'miscellaneous']
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[5.8922438621521, 6.665071487426758]
6f36344b-d70e-4c6a-9855-170cf4aa7cb7
keyphrase-extraction-using-neighborhood
2111.07198
null
https://arxiv.org/abs/2111.07198v1
https://arxiv.org/pdf/2111.07198v1.pdf
Keyphrase Extraction Using Neighborhood Knowledge Based on Word Embeddings
Keyphrase extraction is the task of finding several interesting phrases in a text document, which provide a list of the main topics within the document. Most existing graph-based models use co-occurrence links as cohesion indicators to model the relationship of syntactic elements. However, a word may have different forms of expression within the document, and may have several synonyms as well. Simply using co-occurrence information cannot capture this information. In this paper, we enhance the graph-based ranking model by leveraging word embeddings as background knowledge to add semantic information to the inter-word graph. Our approach is evaluated on established benchmark datasets and empirical results show that the word embedding neighborhood information improves the model performance.
['Mohammed J. Zaki', 'Yuchen Liang']
2021-11-13
null
null
null
null
['keyphrase-extraction']
['natural-language-processing']
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[10.395464897155762, 8.429976463317871]
9843b515-3a52-4459-87a2-6025192596e9
wipin-operation-free-person-identification
1810.04106
null
https://arxiv.org/abs/1810.04106v2
https://arxiv.org/pdf/1810.04106v2.pdf
WiPIN: Operation-free Passive Person Identification Using Wi-Fi Signals
Wi-Fi signals-based person identification attracts increasing attention in the booming Internet-of-Things era mainly due to its pervasiveness and passiveness. Most previous work applies gaits extracted from WiFi distortions caused by the person walking to achieve the identification. However, to extract useful gait, a person must walk along a pre-defined path for several meters, which requires user high collaboration and increases identification time overhead, thus limiting use scenarios. Moreover, gait based work has severe shortcoming in identification performance, especially when the user volume is large. In order to eliminate the above limitations, in this paper, we present an operation-free person identification system, namely WiPIN, that requires least user collaboration and achieves good performance. WiPIN is based on an entirely new insight that Wi-Fi signals would carry person body information when propagating through the body, which is potentially discriminated for person identification. Then we demonstrate the feasibility on commodity off-the-shelf Wi-Fi devices by well-designed signal pre-processing, feature extraction, and identity matching algorithms. Results show that WiPIN achieves 92% identification accuracy over 30 users, high robustness to various experimental settings, and low identifying time overhead, i.e., less than 300ms.
['Feng Lin', 'Fei Wang', 'Kui Ren', 'Jinsong Han']
2018-10-06
null
null
null
null
['person-identification']
['computer-vision']
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[6.726963043212891, 0.6799643039703369]
efbe5472-18cd-47a3-b9fb-83771352565c
learning-the-distribution-of-errors-in-stereo
2304.00152
null
https://arxiv.org/abs/2304.00152v1
https://arxiv.org/pdf/2304.00152v1.pdf
Learning the Distribution of Errors in Stereo Matching for Joint Disparity and Uncertainty Estimation
We present a new loss function for joint disparity and uncertainty estimation in deep stereo matching. Our work is motivated by the need for precise uncertainty estimates and the observation that multi-task learning often leads to improved performance in all tasks. We show that this can be achieved by requiring the distribution of uncertainty to match the distribution of disparity errors via a KL divergence term in the network's loss function. A differentiable soft-histogramming technique is used to approximate the distributions so that they can be used in the loss. We experimentally assess the effectiveness of our approach and observe significant improvements in both disparity and uncertainty prediction on large datasets.
['Philippos Mordohai', 'Weihan Wang', 'Liyan Chen']
2023-03-31
null
http://openaccess.thecvf.com//content/CVPR2023/html/Chen_Learning_the_Distribution_of_Errors_in_Stereo_Matching_for_Joint_CVPR_2023_paper.html
http://openaccess.thecvf.com//content/CVPR2023/papers/Chen_Learning_the_Distribution_of_Errors_in_Stereo_Matching_for_Joint_CVPR_2023_paper.pdf
cvpr-2023-1
['stereo-matching-1']
['computer-vision']
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[8.30721664428711, -2.2283220291137695]
7182d828-5ea2-4928-9ec1-1f4dc0e447d7
electronics-and-sensor-subsystem-design-for
2211.02870
null
https://arxiv.org/abs/2211.02870v1
https://arxiv.org/pdf/2211.02870v1.pdf
Electronics and Sensor Subsystem Design for Daedalus 2 on REXUS 29: An Autorotation Probe for Sub-Orbital Re-Entry
The Daedalus 2 mission aboard REXUS 29 is a technology demonstrator for an alternative descent mechanism for very high altitude drops based on auto-rotation. It consists of two probes that are ejected from a sounding rocket at an altitude of about 80 km and decelerate to a soft landing using only a passive rotor with pitch control. This type of autonomous, scientific experiment poses great challenges upon the electronics subsystem, which include mechanical stress, power system reliability, sensor redundancy, subsystem communication, and development procedures. Based on the data gathered in Daedalus 1 multiple new approaches were developed to fulfill these requirements, such as redundant communication links, mechanical decoupling of PCBs and fault-tolerant power source selection.
['Frederik Dunschen', 'Clemens Riegler', 'Philip Bergmann', 'Lennart Werner', 'Jan M. Wolf']
2022-11-05
null
null
null
null
['pitch-control']
['audio']
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[5.427677154541016, 2.3380684852600098]
b654a539-574a-4e4c-9585-6d51f31a1589
implicit-bilevel-optimization-differentiating
2302.14473
null
https://arxiv.org/abs/2302.14473v1
https://arxiv.org/pdf/2302.14473v1.pdf
Implicit Bilevel Optimization: Differentiating through Bilevel Optimization Programming
Bilevel Optimization Programming is used to model complex and conflicting interactions between agents, for example in Robust AI or Privacy-preserving AI. Integrating bilevel mathematical programming within deep learning is thus an essential objective for the Machine Learning community. Previously proposed approaches only consider single-level programming. In this paper, we extend existing single-level optimization programming approaches and thus propose Differentiating through Bilevel Optimization Programming (BiGrad) for end-to-end learning of models that use Bilevel Programming as a layer. BiGrad has wide applicability and can be used in modern machine learning frameworks. BiGrad is applicable to both continuous and combinatorial Bilevel optimization problems. We describe a class of gradient estimators for the combinatorial case which reduces the requirements in terms of computation complexity; for the case of the continuous variable, the gradient computation takes advantage of the push-back approach (i.e. vector-jacobian product) for an efficient implementation. Experiments show that the BiGrad successfully extends existing single-level approaches to Bilevel Programming.
['Francesco Alesiani']
2023-02-28
null
null
null
null
['bilevel-optimization']
['methodology']
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[6.6822075843811035, 4.3949432373046875]
a1188305-a616-4b7c-a015-15f4bee8bc6d
multi-task-regression-based-learning-for
1907.08320
null
https://arxiv.org/abs/1907.08320v1
https://arxiv.org/pdf/1907.08320v1.pdf
Multi-Task Regression-based Learning for Autonomous Unmanned Aerial Vehicle Flight Control within Unstructured Outdoor Environments
Increased growth in the global Unmanned Aerial Vehicles (UAV) (drone) industry has expanded possibilities for fully autonomous UAV applications. A particular application which has in part motivated this research is the use of UAV in wide area search and surveillance operations in unstructured outdoor environments. The critical issue with such environments is the lack of structured features that could aid in autonomous flight, such as road lines or paths. In this paper, we propose an End-to-End Multi-Task Regression-based Learning approach capable of defining flight commands for navigation and exploration under the forest canopy, regardless of the presence of trails or additional sensors (i.e. GPS). Training and testing are performed using a software in the loop pipeline which allows for a detailed evaluation against state-of-the-art pose estimation techniques. Our extensive experiments demonstrate that our approach excels in performing dense exploration within the required search perimeter, is capable of covering wider search regions, generalises to previously unseen and unexplored environments and outperforms contemporary state-of-the-art techniques.
['Toby P. Breckon', 'Amir Atapour-Abarghouei', 'Bruna G. Maciel-Pearson', 'Samet Akcay', 'Christopher Holder']
2019-07-18
null
null
null
null
['autonomous-flight-dense-forest']
['computer-vision']
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[7.329524993896484, -1.9234261512756348]
2af2903a-9cd0-43a7-97dc-3e4b8c6ecb20
zero-shot-learning-for-code-education-rubric
1809.01357
null
http://arxiv.org/abs/1809.01357v2
http://arxiv.org/pdf/1809.01357v2.pdf
Zero Shot Learning for Code Education: Rubric Sampling with Deep Learning Inference
In modern computer science education, massive open online courses (MOOCs) log thousands of hours of data about how students solve coding challenges. Being so rich in data, these platforms have garnered the interest of the machine learning community, with many new algorithms attempting to autonomously provide feedback to help future students learn. But what about those first hundred thousand students? In most educational contexts (i.e. classrooms), assignments do not have enough historical data for supervised learning. In this paper, we introduce a human-in-the-loop "rubric sampling" approach to tackle the "zero shot" feedback challenge. We are able to provide autonomous feedback for the first students working on an introductory programming assignment with accuracy that substantially outperforms data-hungry algorithms and approaches human level fidelity. Rubric sampling requires minimal teacher effort, can associate feedback with specific parts of a student's solution and can articulate a student's misconceptions in the language of the instructor. Deep learning inference enables rubric sampling to further improve as more assignment specific student data is acquired. We demonstrate our results on a novel dataset from Code.org, the world's largest programming education platform.
['Noah Goodman', 'Milan Mosse', 'Mike Wu', 'Chris Piech']
2018-09-05
null
null
null
null
['misconceptions']
['miscellaneous']
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