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730850ed-f196-4b91-94f7-a2f5a2fcde0c
a-joint-training-framework-for-open-world
null
null
https://openreview.net/forum?id=HozL9BGbnKr
https://openreview.net/pdf?id=HozL9BGbnKr
A Joint Training Framework for Open-World Knowledge Graph Embeddings
Knowledge Graphs(KGs) represent factual information as graphs of entities connected by relations. Knowledge graph embeddings have emerged as a popular approach to encode this information for various downstream tasks like natural language inference, question answering and dialogue generation. As knowledge bases expand, we are presented with newer (open-world) entities, often with textual descriptions. We require techniques to embed new entities as they arrive using the textual information at hand. This task of open-world KG completion has received some attention in recent years. However, we find that existing approaches suffer from one or more of four drawbacks – 1) They are not modular with respect to the choice of the KG embedding model 2) They ignore best practices for aligning two embedding spaces 3) They do not account for differences in training strategy needed when presented with datasets with different description sizes and 4) They do not produce entity embeddings for use by downstream tasks. To address these problems, we propose FOlK (Framework for Open-World KG embeddings) - a technique that jointly learns embeddings for KG entities from descriptions and KG structure for open-world knowledge graph completion. Additionally, we modify existing data sources and make available YAGO3-10- Open and WN18RR-Open two datasets that are well suited for demonstrating the efficacy of open-world KG completion approaches. Finally, we empirically demonstrate the effectiveness of our model in improving upon state-of-the-art baselines on several tasks resulting in performance increases of up to 72% on mean reciprocal rank.
['Balaraman Ravindran', 'Mitesh M Khapra', 'Beethika Tripathi', 'Karthik V']
2021-06-22
null
null
null
akbc-2021-10
['knowledge-graph-embeddings', 'knowledge-graph-embeddings']
['graphs', 'methodology']
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[9.101128578186035, 8.08977222442627]
d934773b-a41d-4e02-bf3f-379f8e6f1f7c
deep-quality-a-deep-no-reference-quality
1609.07170
null
http://arxiv.org/abs/1609.07170v1
http://arxiv.org/pdf/1609.07170v1.pdf
Deep Quality: A Deep No-reference Quality Assessment System
Image quality assessment (IQA) continues to garner great interest in the research community, particularly given the tremendous rise in consumer video capture and streaming. Despite significant research effort in IQA in the past few decades, the area of no-reference image quality assessment remains a great challenge and is largely unsolved. In this paper, we propose a novel no-reference image quality assessment system called Deep Quality, which leverages the power of deep learning to model the complex relationship between visual content and the perceived quality. Deep Quality consists of a novel multi-scale deep convolutional neural network, trained to learn to assess image quality based on training samples consisting of different distortions and degradations such as blur, Gaussian noise, and compression artifacts. Preliminary results using the CSIQ benchmark image quality dataset showed that Deep Quality was able to achieve strong quality prediction performance (89% patch-level and 98% image-level prediction accuracy), being able to achieve similar performance as full-reference IQA methods.
['Alexander Wong', 'Prajna Paramita Dash', 'Akshaya Mishra']
2016-09-22
null
null
null
null
['no-reference-image-quality-assessment']
['computer-vision']
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[11.806092262268066, -1.8198254108428955]
0709f91f-d435-4fbe-ad30-b60656221aa4
cot-mote-exploring-contextual-masked-auto
2304.10195
null
https://arxiv.org/abs/2304.10195v1
https://arxiv.org/pdf/2304.10195v1.pdf
CoT-MoTE: Exploring ConTextual Masked Auto-Encoder Pre-training with Mixture-of-Textual-Experts for Passage Retrieval
Passage retrieval aims to retrieve relevant passages from large collections of the open-domain corpus. Contextual Masked Auto-Encoding has been proven effective in representation bottleneck pre-training of a monolithic dual-encoder for passage retrieval. Siamese or fully separated dual-encoders are often adopted as basic retrieval architecture in the pre-training and fine-tuning stages for encoding queries and passages into their latent embedding spaces. However, simply sharing or separating the parameters of the dual-encoder results in an imbalanced discrimination of the embedding spaces. In this work, we propose to pre-train Contextual Masked Auto-Encoder with Mixture-of-Textual-Experts (CoT-MoTE). Specifically, we incorporate textual-specific experts for individually encoding the distinct properties of queries and passages. Meanwhile, a shared self-attention layer is still kept for unified attention modeling. Results on large-scale passage retrieval benchmarks show steady improvement in retrieval performances. The quantitive analysis also shows a more balanced discrimination of the latent embedding spaces.
['Songlin Hu', 'Peng Wang', 'Xing Wu', 'Guangyuan Ma']
2023-04-20
null
null
null
null
['passage-retrieval']
['natural-language-processing']
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[11.460837364196777, 7.698537349700928]
d06d07d4-8549-421b-8db2-48a3f162a9cb
cheating-off-your-neighbors-improving
2306.06078
null
https://arxiv.org/abs/2306.06078v1
https://arxiv.org/pdf/2306.06078v1.pdf
Cheating off your neighbors: Improving activity recognition through corroboration
Understanding the complexity of human activities solely through an individual's data can be challenging. However, in many situations, surrounding individuals are likely performing similar activities, while existing human activity recognition approaches focus almost exclusively on individual measurements and largely ignore the context of the activity. Consider two activities: attending a small group meeting and working at an office desk. From solely an individual's perspective, it can be difficult to differentiate between these activities as they may appear very similar, even though they are markedly different. Yet, by observing others nearby, it can be possible to distinguish between these activities. In this paper, we propose an approach to enhance the prediction accuracy of an individual's activities by incorporating insights from surrounding individuals. We have collected a real-world dataset from 20 participants with over 58 hours of data including activities such as attending lectures, having meetings, working in the office, and eating together. Compared to observing a single person in isolation, our proposed approach significantly improves accuracy. We regard this work as a first step in collaborative activity recognition, opening new possibilities for understanding human activity in group settings.
['Christine Julien', 'Edison Thomaz', 'Evan King', 'Jingyi An', 'Haoxiang Yu']
2023-05-27
null
null
null
null
['activity-recognition', 'human-activity-recognition', 'human-activity-recognition']
['computer-vision', 'computer-vision', 'time-series']
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[7.9137282371521, 0.5964123606681824]
2c85cdf0-94f3-4048-a52f-46af5677ba08
srcd-semantic-reasoning-with-compound-domains
2307.01750
null
https://arxiv.org/abs/2307.01750v2
https://arxiv.org/pdf/2307.01750v2.pdf
SRCD: Semantic Reasoning with Compound Domains for Single-Domain Generalized Object Detection
This paper provides a novel framework for single-domain generalized object detection (i.e., Single-DGOD), where we are interested in learning and maintaining the semantic structures of self-augmented compound cross-domain samples to enhance the model's generalization ability. Different from DGOD trained on multiple source domains, Single-DGOD is far more challenging to generalize well to multiple target domains with only one single source domain. Existing methods mostly adopt a similar treatment from DGOD to learn domain-invariant features by decoupling or compressing the semantic space. However, there may have two potential limitations: 1) pseudo attribute-label correlation, due to extremely scarce single-domain data; and 2) the semantic structural information is usually ignored, i.e., we found the affinities of instance-level semantic relations in samples are crucial to model generalization. In this paper, we introduce Semantic Reasoning with Compound Domains (SRCD) for Single-DGOD. Specifically, our SRCD contains two main components, namely, the texture-based self-augmentation (TBSA) module, and the local-global semantic reasoning (LGSR) module. TBSA aims to eliminate the effects of irrelevant attributes associated with labels, such as light, shadow, color, etc., at the image level by a light-yet-efficient self-augmentation. Moreover, LGSR is used to further model the semantic relationships on instance features to uncover and maintain the intrinsic semantic structures. Extensive experiments on multiple benchmarks demonstrate the effectiveness of the proposed SRCD.
['Song Guo', 'Xinghao Ding', 'Yue Huang', 'Luyao Tang', 'Jingcai Guo', 'Zhijie Rao']
2023-07-04
null
null
null
null
['object-detection']
['computer-vision']
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[10.075669288635254, 2.4394288063049316]
386d0396-36df-4d1c-9c94-5cdcc60d0a9c
megacrn-meta-graph-convolutional-recurrent
2212.05989
null
https://arxiv.org/abs/2212.05989v2
https://arxiv.org/pdf/2212.05989v2.pdf
MegaCRN: Meta-Graph Convolutional Recurrent Network for Spatio-Temporal Modeling
Spatio-temporal modeling as a canonical task of multivariate time series forecasting has been a significant research topic in AI community. To address the underlying heterogeneity and non-stationarity implied in the graph streams, in this study, we propose Spatio-Temporal Meta-Graph Learning as a novel Graph Structure Learning mechanism on spatio-temporal data. Specifically, we implement this idea into Meta-Graph Convolutional Recurrent Network (MegaCRN) by plugging the Meta-Graph Learner powered by a Meta-Node Bank into GCRN encoder-decoder. We conduct a comprehensive evaluation on two benchmark datasets (METR-LA and PEMS-BAY) and a large-scale spatio-temporal dataset that contains a variaty of non-stationary phenomena. Our model outperformed the state-of-the-arts to a large degree on all three datasets (over 27% MAE and 34% RMSE). Besides, through a series of qualitative evaluations, we demonstrate that our model can explicitly disentangle locations and time slots with different patterns and be robustly adaptive to different anomalous situations. Codes and datasets are available at https://github.com/deepkashiwa20/MegaCRN.
['Shintaro Fukushima', 'Toyotaro Suzumura', 'Xuan Song', 'Yasumasa Kobayashi', 'Quanjun Chen', 'Puneet Jeph', 'Jiawei Yong', 'Zhaonan Wang', 'Renhe Jiang']
2022-12-12
null
null
null
null
['graph-structure-learning']
['graphs']
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[6.737337112426758, 2.699059247970581]
3bd00cef-9210-4d32-8f80-245db6e93daf
learning-3d-human-pose-estimation-from-dozens
2212.14474
null
https://arxiv.org/abs/2212.14474v1
https://arxiv.org/pdf/2212.14474v1.pdf
Learning 3D Human Pose Estimation from Dozens of Datasets using a Geometry-Aware Autoencoder to Bridge Between Skeleton Formats
Deep learning-based 3D human pose estimation performs best when trained on large amounts of labeled data, making combined learning from many datasets an important research direction. One obstacle to this endeavor are the different skeleton formats provided by different datasets, i.e., they do not label the same set of anatomical landmarks. There is little prior research on how to best supervise one model with such discrepant labels. We show that simply using separate output heads for different skeletons results in inconsistent depth estimates and insufficient information sharing across skeletons. As a remedy, we propose a novel affine-combining autoencoder (ACAE) method to perform dimensionality reduction on the number of landmarks. The discovered latent 3D points capture the redundancy among skeletons, enabling enhanced information sharing when used for consistency regularization. Our approach scales to an extreme multi-dataset regime, where we use 28 3D human pose datasets to supervise one model, which outperforms prior work on a range of benchmarks, including the challenging 3D Poses in the Wild (3DPW) dataset. Our code and models are available for research purposes.
['Bastian Leibe', 'Alexander Hermans', 'István Sárándi']
2022-12-29
null
null
null
null
['3d-human-pose-estimation']
['computer-vision']
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[6.926694393157959, -0.9942705631256104]
5d475081-4ffc-442d-82ad-a733d10474c4
optimality-of-thompson-sampling-with
2302.01544
null
https://arxiv.org/abs/2302.01544v1
https://arxiv.org/pdf/2302.01544v1.pdf
Optimality of Thompson Sampling with Noninformative Priors for Pareto Bandits
In the stochastic multi-armed bandit problem, a randomized probability matching policy called Thompson sampling (TS) has shown excellent performance in various reward models. In addition to the empirical performance, TS has been shown to achieve asymptotic problem-dependent lower bounds in several models. However, its optimality has been mainly addressed under light-tailed or one-parameter models that belong to exponential families. In this paper, we consider the optimality of TS for the Pareto model that has a heavy tail and is parameterized by two unknown parameters. Specifically, we discuss the optimality of TS with probability matching priors that include the Jeffreys prior and the reference priors. We first prove that TS with certain probability matching priors can achieve the optimal regret bound. Then, we show the suboptimality of TS with other priors, including the Jeffreys and the reference priors. Nevertheless, we find that TS with the Jeffreys and reference priors can achieve the asymptotic lower bound if one uses a truncation procedure. These results suggest carefully choosing noninformative priors to avoid suboptimality and show the effectiveness of truncation procedures in TS-based policies.
['Masashi Sugiyama', 'Chao-Kai Chiang', 'Junya Honda', 'Jongyeong Lee']
2023-02-03
null
null
null
null
['thompson-sampling']
['methodology']
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[4.529558181762695, 3.2811362743377686]
86a283d1-ebb8-41ef-919e-51b81a0eb083
heterogeneous-temporal-graph-transformer-an
null
null
https://dl.acm.org/doi/abs/10.1145/3447548.3467168
https://dl.acm.org/doi/pdf/10.1145/3447548.3467168
heterogeneous temporal graph transformer: an intelligent system for evolving android malware detection
The explosive growth and increasing sophistication of Android malware call for new defensive techniques to protect mobile users against novel threats. To address this challenge, in this paper, we propose and develop an intelligent system named Dr.Droid to jointly model malware propagation and evolution for their detection at the first attempt. In Dr.Droid, we first exploit higher-level semantic and social relations within the ecosystem (e.g., app-market, app-developer, market-developer relations etc.) to characterize app propagation patterns; and then we present a structured heterogeneous graph to model the complex relations among different types of entities. To capture malware evolution, we further consider the temporal dependence and introduce a heterogeneous temporal graph to jointly model malware propagation and evolution by considering heterogeneous spatial dependencies with temporal dimensions. Afterwards, we propose a novel heterogeneous temporal graph transformer framework (denoted as HTGT) to integrate both spatial and temporal dependencies while preserving the heterogeneity to learn node representations for malware detection. Specifically, in our proposed HTGT, to preserve the heterogeneity, we devise a heterogeneous spatial transformer to derive heterogeneous attentions over each node and edge to learn dedicated representations for different types of entities and relations; to model temporal dependencies, we design a temporal transformer into the HTGT to attentively aggregate its historical sequences of a given node (e.g., app); the two transformers work in an iterative manner for representation learning. Promising experimental results based on the large-scale sample collections from anti-malware industry demonstrate the performance of Dr.Droid, by comparison with state-of-the-art baselines and popular mobile security products.
['Qi Xiong', 'Yinming Mei', 'Kui Wang', 'Wenqiang Wan', 'Yanfang Ye', 'Shifu Hou', 'Mingxuan Ju', 'Yujie Fan']
2021-08-14
null
null
null
kdd-2021-8
['android-malware-detection', 'mobile-security']
['miscellaneous', 'miscellaneous']
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[14.384057998657227, 9.661163330078125]
82e24f91-70b3-4581-a10b-4b5aa2cd9fa7
efficient-inference-in-phylogenetic-indel
null
null
http://papers.nips.cc/paper/3406-efficient-inference-in-phylogenetic-indel-trees
http://papers.nips.cc/paper/3406-efficient-inference-in-phylogenetic-indel-trees.pdf
Efficient Inference in Phylogenetic InDel Trees
Accurate and efficient inference in evolutionary trees is a central problem in computational biology. Realistic models require tracking insertions and deletions along the phylogenetic tree, making inference challenging. We propose new sampling techniques that speed up inference and improve the quality of the samples. We compare our method to previous approaches and show performance improvement on metrics evaluating multiple sequence alignment and reconstruction of ancestral sequences.
['Michael. I. Jordan', 'Alexandre Bouchard-Côté', 'Dan Klein']
2008-12-01
null
null
null
neurips-2008-12
['multiple-sequence-alignment']
['medical']
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[4.868743419647217, 5.155880451202393]
cbbb5cbc-1053-4f62-9155-e17caa503d79
fmg-net-and-w-net-multigrid-inspired-deep
2304.02725
null
https://arxiv.org/abs/2304.02725v1
https://arxiv.org/pdf/2304.02725v1.pdf
FMG-Net and W-Net: Multigrid Inspired Deep Learning Architectures For Medical Imaging Segmentation
Accurate medical imaging segmentation is critical for precise and effective medical interventions. However, despite the success of convolutional neural networks (CNNs) in medical image segmentation, they still face challenges in handling fine-scale features and variations in image scales. These challenges are particularly evident in complex and challenging segmentation tasks, such as the BraTS multi-label brain tumor segmentation challenge. In this task, accurately segmenting the various tumor sub-components, which vary significantly in size and shape, remains a significant challenge, with even state-of-the-art methods producing substantial errors. Therefore, we propose two architectures, FMG-Net and W-Net, that incorporate the principles of geometric multigrid methods for solving linear systems of equations into CNNs to address these challenges. Our experiments on the BraTS 2020 dataset demonstrate that both FMG-Net and W-Net outperform the widely used U-Net architecture regarding tumor subcomponent segmentation accuracy and training efficiency. These findings highlight the potential of incorporating the principles of multigrid methods into CNNs to improve the accuracy and efficiency of medical imaging segmentation.
['David Fuentes', 'Beatrice Riviere', 'Adrian Celaya']
2023-04-05
null
null
null
null
['tumor-segmentation', 'brain-tumor-segmentation']
['computer-vision', 'medical']
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[14.499258995056152, -2.530097246170044]
b99b97c5-434a-4d7f-b857-94c06dbdac06
improving-the-neural-network-based-machine
null
null
https://aclanthology.org/Y18-1038
https://aclanthology.org/Y18-1038.pdf
Improving the neural network-based machine transliteration for low-resourced language pair
null
['Fatiha Sadat', 'Ngoc Tan Le']
null
null
null
null
paclic-2018-12
['transliteration']
['natural-language-processing']
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[-7.351063251495361, 3.6975409984588623]
5f56a25c-ab80-4b25-9bef-5929b35df4fe
entity-relation-and-event-extraction-with
1909.03546
null
https://arxiv.org/abs/1909.03546v2
https://arxiv.org/pdf/1909.03546v2.pdf
Entity, Relation, and Event Extraction with Contextualized Span Representations
We examine the capabilities of a unified, multi-task framework for three information extraction tasks: named entity recognition, relation extraction, and event extraction. Our framework (called DyGIE++) accomplishes all tasks by enumerating, refining, and scoring text spans designed to capture local (within-sentence) and global (cross-sentence) context. Our framework achieves state-of-the-art results across all tasks, on four datasets from a variety of domains. We perform experiments comparing different techniques to construct span representations. Contextualized embeddings like BERT perform well at capturing relationships among entities in the same or adjacent sentences, while dynamic span graph updates model long-range cross-sentence relationships. For instance, propagating span representations via predicted coreference links can enable the model to disambiguate challenging entity mentions. Our code is publicly available at https://github.com/dwadden/dygiepp and can be easily adapted for new tasks or datasets.
['Hannaneh Hajishirzi', 'Yi Luan', 'Ulme Wennberg', 'David Wadden']
2019-09-08
entity-relation-and-event-extraction-with-1
https://aclanthology.org/D19-1585
https://aclanthology.org/D19-1585.pdf
ijcnlp-2019-11
['joint-entity-and-relation-extraction']
['natural-language-processing']
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[9.314842224121094, 9.08706283569336]
83d7db60-32c0-43ca-a36d-dc1845b112a7
3d-pose-estimation-and-future-motion
2111.13285
null
https://arxiv.org/abs/2111.13285v1
https://arxiv.org/pdf/2111.13285v1.pdf
3D Pose Estimation and Future Motion Prediction from 2D Images
This paper considers to jointly tackle the highly correlated tasks of estimating 3D human body poses and predicting future 3D motions from RGB image sequences. Based on Lie algebra pose representation, a novel self-projection mechanism is proposed that naturally preserves human motion kinematics. This is further facilitated by a sequence-to-sequence multi-task architecture based on an encoder-decoder topology, which enables us to tap into the common ground shared by both tasks. Finally, a global refinement module is proposed to boost the performance of our framework. The effectiveness of our approach, called PoseMoNet, is demonstrated by ablation tests and empirical evaluations on Human3.6M and HumanEva-I benchmark, where competitive performance is obtained comparing to the state-of-the-arts.
['Li Cheng', 'Minglun Gong', 'Sen Wang', 'Xinxin Zuo', 'Youdong Ma', 'Ji Yang']
2021-11-26
null
null
null
null
['3d-pose-estimation']
['computer-vision']
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[7.1775641441345215, -0.6116892099380493]
1ae6c26c-da89-4594-b43a-5737c126ad2f
domain-generalization-for-mammographic-image
2304.10226
null
https://arxiv.org/abs/2304.10226v4
https://arxiv.org/pdf/2304.10226v4.pdf
Domain Generalization for Mammographic Image Analysis with Contrastive Learning
The deep learning technique has been shown to be effectively addressed several image analysis tasks in the computer-aided diagnosis scheme for mammography. The training of an efficacious deep learning model requires large data with diverse styles and qualities. The diversity of data often comes from the use of various scanners of vendors. But, in practice, it is impractical to collect a sufficient amount of diverse data for training. To this end, a novel contrastive learning is developed to equip the deep learning models with better style generalization capability. Specifically, the multi-style and multi-view unsupervised self-learning scheme is carried out to seek robust feature embedding against style diversity as a pretrained model. Afterward, the pretrained network is further fine-tuned to the downstream tasks, e.g., mass detection, matching, BI-RADS rating, and breast density classification. The proposed method has been evaluated extensively and rigorously with mammograms from various vendor style domains and several public datasets. The experimental results suggest that the proposed domain generalization method can effectively improve performance of four mammographic image tasks on the data from both seen and unseen domains, and outperform many state-of-the-art (SOTA) generalization methods.
['Jie-Zhi Cheng', 'Dinggang Shen', 'Chunling Liu', 'Zaiyi Liu', 'Yajia Gu', 'Xiangyu Zhao', 'Dongdong Chen', 'Xi Ouyang', 'Chenjin Lei', 'Sheng Wang', 'Lichi Zhang', 'Zhiming Cui', 'Zheren Li']
2023-04-20
null
null
null
null
['style-generalization', 'breast-density-classification', 'self-learning']
['computer-vision', 'medical', 'natural-language-processing']
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[14.813976287841797, -2.0026071071624756]
fcd53fa7-83e4-4529-af82-e239c01aafee
advances-in-hyperspectral-image
1310.5107
null
http://arxiv.org/abs/1310.5107v1
http://arxiv.org/pdf/1310.5107v1.pdf
Advances in Hyperspectral Image Classification: Earth monitoring with statistical learning methods
Hyperspectral images show similar statistical properties to natural grayscale or color photographic images. However, the classification of hyperspectral images is more challenging because of the very high dimensionality of the pixels and the small number of labeled examples typically available for learning. These peculiarities lead to particular signal processing problems, mainly characterized by indetermination and complex manifolds. The framework of statistical learning has gained popularity in the last decade. New methods have been presented to account for the spatial homogeneity of images, to include user's interaction via active learning, to take advantage of the manifold structure with semisupervised learning, to extract and encode invariances, or to adapt classifiers and image representations to unseen yet similar scenes. This tutuorial reviews the main advances for hyperspectral remote sensing image classification through illustrative examples.
['Jón Atli Benediktsson', 'Gustavo Camps-Valls', 'Devis Tuia', 'Lorenzo Bruzzone']
2013-10-18
null
null
null
null
['classification-of-hyperspectral-images', 'remote-sensing-image-classification']
['computer-vision', 'miscellaneous']
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[9.993253707885742, -1.9149678945541382]
ac81425e-bc7d-4d31-9481-c3c38b87a7a2
multi-microphone-speaker-separation-by
2303.07143
null
https://arxiv.org/abs/2303.07143v1
https://arxiv.org/pdf/2303.07143v1.pdf
Multi-Microphone Speaker Separation by Spatial Regions
We consider the task of region-based source separation of reverberant multi-microphone recordings. We assume pre-defined spatial regions with a single active source per region. The objective is to estimate the signals from the individual spatial regions as captured by a reference microphone while retaining a correspondence between signals and spatial regions. We propose a data-driven approach using a modified version of a state-of-the-art network, where different layers model spatial and spectro-temporal information. The network is trained to enforce a fixed mapping of regions to network outputs. Using speech from LibriMix, we construct a data set specifically designed to contain the region information. Additionally, we train the network with permutation invariant training. We show that both training methods result in a fixed mapping of regions to network outputs, achieve comparable performance, and that the networks exploit spatial information. The proposed network outperforms a baseline network by 1.5 dB in scale-invariant signal-to-distortion ratio.
['Emanuël A. P. Habets', 'Wolfgang Mack', 'Srikanth Raj Chetupalli', 'Julian Wechsler']
2023-03-13
null
null
null
null
['speaker-separation']
['speech']
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[15.111133575439453, 5.769516468048096]
1b1d3600-b2d1-45a0-a1fa-e1ca8fc112a1
reasoning-over-different-types-of-knowledge
2212.05767
null
https://arxiv.org/abs/2212.05767v6
https://arxiv.org/pdf/2212.05767v6.pdf
A Survey of Knowledge Graph Reasoning on Graph Types: Static, Dynamic, and Multimodal
Knowledge graph reasoning (KGR), aiming to deduce new facts from existing facts based on mined logic rules underlying knowledge graphs (KGs), has become a fast-growing research direction. It has been proven to significantly benefit the usage of KGs in many AI applications, such as question answering and recommendation systems, etc. According to the graph types, the existing KGR models can be roughly divided into three categories, i.e., static models, temporal models, and multi-modal models. The early works in this domain mainly focus on static KGR and tend to directly apply general knowledge graph embedding models to the reasoning task. However, these models are not suitable for more complex but practical tasks, such as inductive static KGR, temporal KGR, and multi-modal KGR. To this end, multiple works have been developed recently, but no survey papers and open-source repositories comprehensively summarize and discuss models in this important direction. To fill the gap, we conduct a survey for knowledge graph reasoning tracing from static to temporal and then to multi-modal KGs. Concretely, the preliminaries, summaries of KGR models, and typical datasets are introduced and discussed consequently. Moreover, we discuss the challenges and potential opportunities. The corresponding open-source repository is shared on GitHub: https://github.com/LIANGKE23/Awesome-Knowledge-Graph-Reasoning.
['Fuchun Sun', 'Xinwang Liu', 'Sihang Zhou', 'Siwei Wang', 'Wenxuan Tu', 'Yue Liu', 'Meng Liu', 'Lingyuan Meng', 'Ke Liang']
2022-12-12
null
null
null
null
['knowledge-graph-embedding', 'general-knowledge']
['graphs', 'miscellaneous']
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[8.863030433654785, 7.893924236297607]
d05483ec-faaf-4939-90e3-2f662ae45133
camera-based-image-forgery-localization-using
1808.09714
null
http://arxiv.org/abs/1808.09714v1
http://arxiv.org/pdf/1808.09714v1.pdf
Camera-based Image Forgery Localization using Convolutional Neural Networks
Camera fingerprints are precious tools for a number of image forensics tasks. A well-known example is the photo response non-uniformity (PRNU) noise pattern, a powerful device fingerprint. Here, to address the image forgery localization problem, we rely on noiseprint, a recently proposed CNN-based camera model fingerprint. The CNN is trained to minimize the distance between same-model patches, and maximize the distance otherwise. As a result, the noiseprint accounts for model-related artifacts just like the PRNU accounts for device-related non-uniformities. However, unlike the PRNU, it is only mildly affected by residuals of high-level scene content. The experiments show that the proposed noiseprint-based forgery localization method improves over the PRNU-based reference.
['Luisa Verdoliva', 'Davide Cozzolino']
2018-08-29
null
null
null
null
['image-forensics']
['computer-vision']
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[12.3809814453125, 0.9952765703201294]
152ea822-e34f-4e83-885a-521c07c7fae8
a-new-baseline-for-greenai-finding-the
2302.10798
null
https://arxiv.org/abs/2302.10798v2
https://arxiv.org/pdf/2302.10798v2.pdf
Lightweight Parameter Pruning for Energy-Efficient Deep Learning: A Binarized Gating Module Approach
The subject of green AI has been gaining attention within the deep learning community given the recent trend of ever larger and more complex neural network models. Existing solutions for reducing the computational load of training at inference time usually involve pruning the network parameters. Pruning schemes often create extra overhead either by iterative training and fine-tuning for static pruning or repeated computation of a dynamic pruning graph. We propose a new parameter pruning strategy for learning a lighter-weight sub-network that minimizes the energy cost while maintaining comparable performance to the fully parameterised network on given downstream tasks. Our proposed pruning scheme is green-oriented, as it only requires a one-off training to discover the optimal static sub-networks by dynamic pruning methods. The pruning scheme consists of a binary gating module and a novel loss function to uncover sub-networks with user-defined sparsity. Our method enables pruning and training simultaneously, which saves energy in both the training and inference phases and avoids extra computational overhead from gating modules at inference time. Our results on CIFAR-10 and CIFAR-100 suggest that our scheme can remove 50% of connections in deep networks with 1% reduction in classification accuracy. Compared to other related pruning methods, our method demonstrates a lower drop in accuracy for equivalent reductions in computational cost.
['Sean Moran', 'Ruibo Shi', 'Fran Silavong', 'Pheobe Sun', 'Varun Babbar', 'Xiaoying Zhi']
2023-02-17
null
null
null
null
['total-energy']
['miscellaneous']
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[8.55786418914795, 3.1786952018737793]
3b3ff4f5-ba39-4f7e-9dbb-374c2d40af8b
higher-order-graph-attention-network-for
2306.15526
null
https://arxiv.org/abs/2306.15526v1
https://arxiv.org/pdf/2306.15526v1.pdf
Higher-order Graph Attention Network for Stock Selection with Joint Analysis
Stock selection is important for investors to construct profitable portfolios. Graph neural networks (GNNs) are increasingly attracting researchers for stock prediction due to their strong ability of relation modelling and generalisation. However, the existing GNN methods only focus on simple pairwise stock relation and do not capture complex higher-order structures modelling relations more than two nodes. In addition, they only consider factors of technical analysis and overlook factors of fundamental analysis that can affect the stock trend significantly. Motivated by them, we propose higher-order graph attention network with joint analysis (H-GAT). H-GAT is able to capture higher-order structures and jointly incorporate factors of fundamental analysis with factors of technical analysis. Specifically, the sequential layer of H-GAT take both types of factors as the input of a long-short term memory model. The relation embedding layer of H-GAT constructs a higher-order graph and learn node embedding with GAT. We then predict the ranks of stock return. Extensive experiments demonstrate the superiority of our H-GAT method on the profitability test and Sharp ratio over both NSDAQ and NYSE datasets
['Yan Ge', 'Zheng Li', 'Xiang Li', 'Yiping Xia', 'Yang Qiao']
2023-06-27
null
null
null
null
['graph-attention', 'stock-prediction']
['graphs', 'time-series']
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[4.3458662033081055, 4.324032306671143]
4128e61e-75cf-4fe6-b140-d09529cbb740
a-data-dependent-multiscale-model-for
1808.01047
null
https://arxiv.org/abs/1808.01047v4
https://arxiv.org/pdf/1808.01047v4.pdf
A Data Dependent Multiscale Model for Hyperspectral Unmixing With Spectral Variability
Spectral variability in hyperspectral images can result from factors including environmental, illumination, atmospheric and temporal changes. Its occurrence may lead to the propagation of significant estimation errors in the unmixing process. To address this issue, extended linear mixing models have been proposed which lead to large scale nonsmooth ill-posed inverse problems. Furthermore, the regularization strategies used to obtain meaningful results have introduced interdependencies among abundance solutions that further increase the complexity of the resulting optimization problem. In this paper we present a novel data dependent multiscale model for hyperspectral unmixing accounting for spectral variability. The new method incorporates spatial contextual information to the abundances in extended linear mixing models by using a multiscale transform based on superpixels. The proposed method results in a fast algorithm that solves the abundance estimation problem only once in each scale during each iteration. Simulation results using synthetic and real images compare the performances, both in accuracy and execution time, of the proposed algorithm and other state-of-the-art solutions.
['José Carlos Moreira Bermudez', 'Tales Imbiriba', 'Ricardo Augusto Borsoi']
2018-08-02
null
null
null
null
['hyperspectral-unmixing']
['computer-vision']
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[10.078707695007324, -2.089751720428467]
ad17a78c-9733-452f-bf25-3eb249a0b868
silveralign-mt-based-silver-data-algorithm
2210.06207
null
https://arxiv.org/abs/2210.06207v2
https://arxiv.org/pdf/2210.06207v2.pdf
SilverAlign: MT-Based Silver Data Algorithm For Evaluating Word Alignment
Word alignments are essential for a variety of NLP tasks. Therefore, choosing the best approaches for their creation is crucial. However, the scarce availability of gold evaluation data makes the choice difficult. We propose SilverAlign, a new method to automatically create silver data for the evaluation of word aligners by exploiting machine translation and minimal pairs. We show that performance on our silver data correlates well with gold benchmarks for 9 language pairs, making our approach a valid resource for evaluation of different domains and languages when gold data are not available. This addresses the important scenario of missing gold data alignments for low-resource languages.
['Hinrich Schütze', 'Silvia Severini', 'Abdullatif Köksal']
2022-10-12
null
null
null
null
['word-alignment']
['natural-language-processing']
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[11.235960960388184, 10.187694549560547]
0febbf12-be27-44f7-aae0-559af9b3f324
bcot-a-markerless-high-precision-3d-object
2203.13437
null
https://arxiv.org/abs/2203.13437v1
https://arxiv.org/pdf/2203.13437v1.pdf
BCOT: A Markerless High-Precision 3D Object Tracking Benchmark
Template-based 3D object tracking still lacks a high-precision benchmark of real scenes due to the difficulty of annotating the accurate 3D poses of real moving video objects without using markers. In this paper, we present a multi-view approach to estimate the accurate 3D poses of real moving objects, and then use binocular data to construct a new benchmark for monocular textureless 3D object tracking. The proposed method requires no markers, and the cameras only need to be synchronous, relatively fixed as cross-view and calibrated. Based on our object-centered model, we jointly optimize the object pose by minimizing shape re-projection constraints in all views, which greatly improves the accuracy compared with the single-view approach, and is even more accurate than the depth-based method. Our new benchmark dataset contains 20 textureless objects, 22 scenes, 404 video sequences and 126K images captured in real scenes. The annotation error is guaranteed to be less than 2mm, according to both theoretical analysis and validation experiments. We re-evaluate the state-of-the-art 3D object tracking methods with our dataset, reporting their performance ranking in real scenes. Our BCOT benchmark and code can be found at https://ar3dv.github.io/BCOT-Benchmark/.
['Xueying Qin', 'Jason Gu', 'Te Li', 'Wenxuan Chen', 'Fan Zhong', 'Xin Cao', 'Shiqiang Zhu', 'Bin Wang', 'Jiachen Li']
2022-03-25
null
http://openaccess.thecvf.com//content/CVPR2022/html/Li_BCOT_A_Markerless_High-Precision_3D_Object_Tracking_Benchmark_CVPR_2022_paper.html
http://openaccess.thecvf.com//content/CVPR2022/papers/Li_BCOT_A_Markerless_High-Precision_3D_Object_Tracking_Benchmark_CVPR_2022_paper.pdf
cvpr-2022-1
['3d-object-tracking']
['computer-vision']
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[6.869147300720215, -2.154954671859741]
63377b83-9894-4598-aa4e-b062fa1de5bc
compressive-self-localization-using-relative
2208.08863
null
https://arxiv.org/abs/2208.08863v1
https://arxiv.org/pdf/2208.08863v1.pdf
Compressive Self-localization Using Relative Attribute Embedding
The use of relative attribute (e.g., beautiful, safe, convenient) -based image embeddings in visual place recognition, as a domain-adaptive compact image descriptor that is orthogonal to the typical approach of absolute attribute (e.g., color, shape, texture) -based image embeddings, is explored in this paper.
['Kanji Tanaka', 'Ryogo Yamamoto']
2022-08-03
null
null
null
null
['visual-place-recognition']
['computer-vision']
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[7.720747947692871, -1.5958683490753174]
8d71ef41-7c7f-4cb0-8222-a7d29993cc41
real-time-hand-gesture-identification-in
2303.02321
null
https://arxiv.org/abs/2303.02321v1
https://arxiv.org/pdf/2303.02321v1.pdf
Real-Time Hand Gesture Identification in Thermal Images
Hand gesture-based human-computer interaction is an important problem that is well explored using color camera data. In this work we proposed a hand gesture detection system using thermal images. Our system is capable of handling multiple hand regions in a frame and process it fast for real-time applications. Our system performs a series of steps including background subtraction-based hand mask generation, k-means based hand region identification, hand segmentation to remove the forearm region, and a Convolutional Neural Network (CNN) based gesture classification. Our work introduces two novel algorithms, bubble growth and bubble search, for faster hand segmentation. We collected a new thermal image data set with 10 gestures and reported an end-to-end hand gesture recognition accuracy of 97%.
['Soumyabrata Dey', 'James Ballow']
2023-03-04
null
null
null
null
['hand-gesture-recognition', 'hand-gesture-recognition-1', 'gesture-recognition', 'hand-segmentation']
['computer-vision', 'computer-vision', 'computer-vision', 'computer-vision']
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[6.497348308563232, -0.35542652010917664]
7152836e-a683-4373-a572-3ce2da5d5a4b
don-t-freeze-finetune-encoders-for-better
2307.01168
null
https://arxiv.org/abs/2307.01168v1
https://arxiv.org/pdf/2307.01168v1.pdf
Don't freeze: Finetune encoders for better Self-Supervised HAR
Recently self-supervised learning has been proposed in the field of human activity recognition as a solution to the labelled data availability problem. The idea being that by using pretext tasks such as reconstruction or contrastive predictive coding, useful representations can be learned that then can be used for classification. Those approaches follow the pretrain, freeze and fine-tune procedure. In this paper we will show how a simple change - not freezing the representation - leads to substantial performance gains across pretext tasks. The improvement was found in all four investigated datasets and across all four pretext tasks and is inversely proportional to amount of labelled data. Moreover the effect is present whether the pretext task is carried on the Capture24 dataset or directly in unlabelled data of the target dataset.
['Paul Lukowicz', 'Dominique Nshimyimana', 'Vitor Fortes Rey']
2023-07-03
null
null
null
null
['self-supervised-learning', 'activity-recognition', 'human-activity-recognition', 'human-activity-recognition']
['computer-vision', 'computer-vision', 'computer-vision', 'time-series']
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[9.880827903747559, 3.045367956161499]
3fccc9d4-5a4a-4165-a0a2-1c2bc96ae32a
learning-from-what-is-already-out-there-few
2301.03769
null
https://arxiv.org/abs/2301.03769v1
https://arxiv.org/pdf/2301.03769v1.pdf
Learning from What is Already Out There: Few-shot Sign Language Recognition with Online Dictionaries
Today's sign language recognition models require large training corpora of laboratory-like videos, whose collection involves an extensive workforce and financial resources. As a result, only a handful of such systems are publicly available, not to mention their limited localization capabilities for less-populated sign languages. Utilizing online text-to-video dictionaries, which inherently hold annotated data of various attributes and sign languages, and training models in a few-shot fashion hence poses a promising path for the democratization of this technology. In this work, we collect and open-source the UWB-SL-Wild few-shot dataset, the first of its kind training resource consisting of dictionary-scraped videos. This dataset represents the actual distribution and characteristics of available online sign language data. We select glosses that directly overlap with the already existing datasets WLASL100 and ASLLVD and share their class mappings to allow for transfer learning experiments. Apart from providing baseline results on a pose-based architecture, we introduce a novel approach to training sign language recognition models in a few-shot scenario, resulting in state-of-the-art results on ASLLVD-Skeleton and ASLLVD-Skeleton-20 datasets with top-1 accuracy of $30.97~\%$ and $95.45~\%$, respectively.
['Marek Hrúz', 'Matyáš Boháček']
2023-01-10
null
null
null
null
['sign-language-recognition']
['computer-vision']
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[9.146193504333496, -6.467928409576416]
bf1acdf1-6633-45e7-b47e-3988176ea50a
prix-lm-pretraining-for-multilingual
2110.08443
null
https://arxiv.org/abs/2110.08443v2
https://arxiv.org/pdf/2110.08443v2.pdf
Prix-LM: Pretraining for Multilingual Knowledge Base Construction
Knowledge bases (KBs) contain plenty of structured world and commonsense knowledge. As such, they often complement distributional text-based information and facilitate various downstream tasks. Since their manual construction is resource- and time-intensive, recent efforts have tried leveraging large pretrained language models (PLMs) to generate additional monolingual knowledge facts for KBs. However, such methods have not been attempted for building and enriching multilingual KBs. Besides wider application, such multilingual KBs can provide richer combined knowledge than monolingual (e.g., English) KBs. Knowledge expressed in different languages may be complementary and unequally distributed: this implies that the knowledge available in high-resource languages can be transferred to low-resource ones. To achieve this, it is crucial to represent multilingual knowledge in a shared/unified space. To this end, we propose a unified representation model, Prix-LM, for multilingual KB construction and completion. We leverage two types of knowledge, monolingual triples and cross-lingual links, extracted from existing multilingual KBs, and tune a multilingual language encoder XLM-R via a causal language modeling objective. Prix-LM integrates useful multilingual and KB-based factual knowledge into a single model. Experiments on standard entity-related tasks, such as link prediction in multiple languages, cross-lingual entity linking and bilingual lexicon induction, demonstrate its effectiveness, with gains reported over strong task-specialised baselines.
['Muhao Chen', 'Nigel Collier', 'Ivan Vulić', 'Fangyu Liu', 'Wenxuan Zhou']
2021-10-16
null
https://aclanthology.org/2022.acl-long.371
https://aclanthology.org/2022.acl-long.371.pdf
acl-2022-5
['cross-lingual-entity-linking']
['natural-language-processing']
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[9.541332244873047, 8.808162689208984]
141a7dda-ff71-42ab-9f01-eedba263bec4
multi-label-meta-weighting-for-long-tailed
2306.10122
null
https://arxiv.org/abs/2306.10122v1
https://arxiv.org/pdf/2306.10122v1.pdf
Multi-Label Meta Weighting for Long-Tailed Dynamic Scene Graph Generation
This paper investigates the problem of scene graph generation in videos with the aim of capturing semantic relations between subjects and objects in the form of $\langle$subject, predicate, object$\rangle$ triplets. Recognizing the predicate between subject and object pairs is imbalanced and multi-label in nature, ranging from ubiquitous interactions such as spatial relationships (\eg \emph{in front of}) to rare interactions such as \emph{twisting}. In widely-used benchmarks such as Action Genome and VidOR, the imbalance ratio between the most and least frequent predicates reaches 3,218 and 3,408, respectively, surpassing even benchmarks specifically designed for long-tailed recognition. Due to the long-tailed distributions and label co-occurrences, recent state-of-the-art methods predominantly focus on the most frequently occurring predicate classes, ignoring those in the long tail. In this paper, we analyze the limitations of current approaches for scene graph generation in videos and identify a one-to-one correspondence between predicate frequency and recall performance. To make the step towards unbiased scene graph generation in videos, we introduce a multi-label meta-learning framework to deal with the biased predicate distribution. Our meta-learning framework learns a meta-weight network for each training sample over all possible label losses. We evaluate our approach on the Action Genome and VidOR benchmarks by building upon two current state-of-the-art methods for each benchmark. The experiments demonstrate that the multi-label meta-weight network improves the performance for predicates in the long tail without compromising performance for head classes, resulting in better overall performance and favorable generalizability. Code: \url{https://github.com/shanshuo/ML-MWN}.
['Cees G. M. Snoek', 'Pascal Mettes', 'Yingjun Du', 'Shuo Chen']
2023-06-16
null
null
null
null
['scene-graph-generation', 'unbiased-scene-graph-generation', 'meta-learning']
['computer-vision', 'computer-vision', 'methodology']
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[10.313591957092285, 1.7061268091201782]
71baf2d4-0bd2-43d3-a608-995fcf65743d
visual-prompt-based-personalized-federated
2303.08678
null
https://arxiv.org/abs/2303.08678v1
https://arxiv.org/pdf/2303.08678v1.pdf
Visual Prompt Based Personalized Federated Learning
As a popular paradigm of distributed learning, personalized federated learning (PFL) allows personalized models to improve generalization ability and robustness by utilizing knowledge from all distributed clients. Most existing PFL algorithms tackle personalization in a model-centric way, such as personalized layer partition, model regularization, and model interpolation, which all fail to take into account the data characteristics of distributed clients. In this paper, we propose a novel PFL framework for image classification tasks, dubbed pFedPT, that leverages personalized visual prompts to implicitly represent local data distribution information of clients and provides that information to the aggregation model to help with classification tasks. Specifically, in each round of pFedPT training, each client generates a local personalized prompt related to local data distribution. Then, the local model is trained on the input composed of raw data and a visual prompt to learn the distribution information contained in the prompt. During model testing, the aggregated model obtains prior knowledge of the data distributions based on the prompts, which can be seen as an adaptive fine-tuning of the aggregation model to improve model performances on different clients. Furthermore, the visual prompt can be added as an orthogonal method to implement personalization on the client for existing FL methods to boost their performance. Experiments on the CIFAR10 and CIFAR100 datasets show that pFedPT outperforms several state-of-the-art (SOTA) PFL algorithms by a large margin in various settings.
['DaCheng Tao', 'Baoyuan Wu', 'Li Shen', 'Yan Sun', 'Wansen Wu', 'Guanghao Li']
2023-03-15
null
null
null
null
['personalized-federated-learning']
['methodology']
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[5.8199262619018555, 6.2872796058654785]
6ea15585-5125-4f0b-9a11-a7635f1d0221
joint-biomedical-entity-and-relation
2105.13456
null
https://arxiv.org/abs/2105.13456v2
https://arxiv.org/pdf/2105.13456v2.pdf
Joint Biomedical Entity and Relation Extraction with Knowledge-Enhanced Collective Inference
Compared to the general news domain, information extraction (IE) from biomedical text requires much broader domain knowledge. However, many previous IE methods do not utilize any external knowledge during inference. Due to the exponential growth of biomedical publications, models that do not go beyond their fixed set of parameters will likely fall behind. Inspired by how humans look up relevant information to comprehend a scientific text, we present a novel framework that utilizes external knowledge for joint entity and relation extraction named KECI (Knowledge-Enhanced Collective Inference). Given an input text, KECI first constructs an initial span graph representing its initial understanding of the text. It then uses an entity linker to form a knowledge graph containing relevant background knowledge for the the entity mentions in the text. To make the final predictions, KECI fuses the initial span graph and the knowledge graph into a more refined graph using an attention mechanism. KECI takes a collective approach to link mention spans to entities by integrating global relational information into local representations using graph convolutional networks. Our experimental results show that the framework is highly effective, achieving new state-of-the-art results in two different benchmark datasets: BioRelEx (binding interaction detection) and ADE (adverse drug event extraction). For example, KECI achieves absolute improvements of 4.59% and 4.91% in F1 scores over the state-of-the-art on the BioRelEx entity and relation extraction tasks.
['Quan Hung Tran', 'ChengXiang Zhai', 'Heng Ji', 'Tuan Lai']
2021-05-27
null
https://aclanthology.org/2021.acl-long.488
https://aclanthology.org/2021.acl-long.488.pdf
acl-2021-5
['joint-entity-and-relation-extraction']
['natural-language-processing']
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[8.636580467224121, 8.70535945892334]
cdf18f97-e3cf-4206-b587-1c82beef07eb
starss22-a-dataset-of-spatial-recordings-of
2206.01948
null
https://arxiv.org/abs/2206.01948v2
https://arxiv.org/pdf/2206.01948v2.pdf
STARSS22: A dataset of spatial recordings of real scenes with spatiotemporal annotations of sound events
This report presents the Sony-TAu Realistic Spatial Soundscapes 2022 (STARS22) dataset for sound event localization and detection, comprised of spatial recordings of real scenes collected in various interiors of two different sites. The dataset is captured with a high resolution spherical microphone array and delivered in two 4-channel formats, first-order Ambisonics and tetrahedral microphone array. Sound events in the dataset belonging to 13 target sound classes are annotated both temporally and spatially through a combination of human annotation and optical tracking. The dataset serves as the development and evaluation dataset for the Task 3 of the DCASE2022 Challenge on Sound Event Localization and Detection and introduces significant new challenges for the task compared to the previous iterations, which were based on synthetic spatialized sound scene recordings. Dataset specifications are detailed including recording and annotation process, target classes and their presence, and details on the development and evaluation splits. Additionally, the report presents the baseline system that accompanies the dataset in the challenge with emphasis on the differences with the baseline of the previous iterations; namely, introduction of the multi-ACCDOA representation to handle multiple simultaneous occurences of events of the same class, and support for additional improved input features for the microphone array format. Results of the baseline indicate that with a suitable training strategy a reasonable detection and localization performance can be achieved on real sound scene recordings. The dataset is available in https://zenodo.org/record/6387880.
['Tuomas Virtanen', 'Yuki Mitsufuji', 'Shusuke Takahashi', 'Naoya Takahashi', 'Yuichiro Koyama', 'Daniel Krause', 'Sharath Adavanne', 'Parthasaarathy Sudarsanam', 'Kazuki Shimada', 'Archontis Politis']
2022-06-04
null
null
null
null
['sound-event-localization-and-detection']
['audio']
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[15.125121116638184, 5.2570719718933105]
83de367b-b4e7-4dd5-8063-7b0b1a1726a8
trust-your-nabla-gradient-based-intervention
2211.13715
null
https://arxiv.org/abs/2211.13715v2
https://arxiv.org/pdf/2211.13715v2.pdf
Trust Your $\nabla$: Gradient-based Intervention Targeting for Causal Discovery
Inferring causal structure from data is a challenging task of fundamental importance in science. Observational data are often insufficient to identify a system's causal structure uniquely. While conducting interventions (i.e., experiments) can improve the identifiability, such samples are usually challenging and expensive to obtain. Hence, experimental design approaches for causal discovery aim to minimize the number of interventions by estimating the most informative intervention target. In this work, we propose a novel Gradient-based Intervention Targeting method, abbreviated GIT, that 'trusts' the gradient estimator of a gradient-based causal discovery framework to provide signals for the intervention acquisition function. We provide extensive experiments in simulated and real-world datasets and demonstrate that GIT performs on par with competitive baselines, surpassing them in the low-data regime.
['Piotr Miłoś', 'Łukasz Kuciński', 'Stefan Bauer', 'Yashas Annadani', 'Nino Scherrer', 'Aleksandra Nowak', 'Michał Zając', 'Mateusz Olko']
2022-11-24
null
null
null
null
['causal-discovery']
['knowledge-base']
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[7.86415958404541, 5.243180274963379]
c2ec22ae-a2c1-4c16-8536-78e8d1df2eab
matrix-completion-with-heterogonous-cost
2203.12120
null
https://arxiv.org/abs/2203.12120v3
https://arxiv.org/pdf/2203.12120v3.pdf
Matrix Completion with Heterogonous Cost
The matrix completion problem has been studied broadly under many underlying conditions. The problem has been explored under adaptive or non-adaptive, exact or estimation, single-phase or multi-phase, and many other categories. In most of these cases, the observation cost of each entry is uniform and has the same cost across the columns. However, in many real-life scenarios, we could expect elements from distinct columns or distinct positions to have a different cost. In this paper, we explore this generalization under adaptive conditions. We approach the problem under two different cost models. The first one is that entries from different columns have different observation costs, but, within the same column, each entry has a uniform cost. The second one is any two entry has different observation cost, despite being the same or different columns. We provide complexity analysis of our algorithms and provide tightness guarantees.
['Ilqar Ramazanli']
2022-03-23
null
null
null
null
['matrix-completion']
['methodology']
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[6.936349391937256, 4.711359977722168]
f840cb58-1287-44a5-8f11-8d3837d16737
spanproto-a-two-stage-span-based-prototypical
2210.09049
null
https://arxiv.org/abs/2210.09049v2
https://arxiv.org/pdf/2210.09049v2.pdf
SpanProto: A Two-stage Span-based Prototypical Network for Few-shot Named Entity Recognition
Few-shot Named Entity Recognition (NER) aims to identify named entities with very little annotated data. Previous methods solve this problem based on token-wise classification, which ignores the information of entity boundaries, and inevitably the performance is affected by the massive non-entity tokens. To this end, we propose a seminal span-based prototypical network (SpanProto) that tackles few-shot NER via a two-stage approach, including span extraction and mention classification. In the span extraction stage, we transform the sequential tags into a global boundary matrix, enabling the model to focus on the explicit boundary information. For mention classification, we leverage prototypical learning to capture the semantic representations for each labeled span and make the model better adapt to novel-class entities. To further improve the model performance, we split out the false positives generated by the span extractor but not labeled in the current episode set, and then present a margin-based loss to separate them from each prototype region. Experiments over multiple benchmarks demonstrate that our model outperforms strong baselines by a large margin.
['Chengyu Wang', 'Chengcheng Han', 'Ming Gao', 'Jun Huang', 'Songfang Huang', 'Minghui Qiu', 'Chuanqi Tan', 'Jianing Wang']
2022-10-17
null
null
null
null
['few-shot-ner']
['natural-language-processing']
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[9.566177368164062, 9.400917053222656]
4cea5fe2-4407-4f14-821a-7ec622abee62
dcl-net-deep-correspondence-learning-network
2210.05232
null
https://arxiv.org/abs/2210.05232v1
https://arxiv.org/pdf/2210.05232v1.pdf
DCL-Net: Deep Correspondence Learning Network for 6D Pose Estimation
Establishment of point correspondence between camera and object coordinate systems is a promising way to solve 6D object poses. However, surrogate objectives of correspondence learning in 3D space are a step away from the true ones of object pose estimation, making the learning suboptimal for the end task. In this paper, we address this shortcoming by introducing a new method of Deep Correspondence Learning Network for direct 6D object pose estimation, shortened as DCL-Net. Specifically, DCL-Net employs dual newly proposed Feature Disengagement and Alignment (FDA) modules to establish, in the feature space, partial-to-partial correspondence and complete-to-complete one for partial object observation and its complete CAD model, respectively, which result in aggregated pose and match feature pairs from two coordinate systems; these two FDA modules thus bring complementary advantages. The match feature pairs are used to learn confidence scores for measuring the qualities of deep correspondence, while the pose feature pairs are weighted by confidence scores for direct object pose regression. A confidence-based pose refinement network is also proposed to further improve pose precision in an iterative manner. Extensive experiments show that DCL-Net outperforms existing methods on three benchmarking datasets, including YCB-Video, LineMOD, and Oclussion-LineMOD; ablation studies also confirm the efficacy of our novel designs.
['Kui Jia', 'Jiehong Lin', 'Hongyang Li']
2022-10-11
null
null
null
null
['6d-pose-estimation-1', '6d-pose-estimation']
['computer-vision', 'computer-vision']
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[7.500960350036621, -2.651764392852783]
1ef2348f-15c3-4c74-8eed-39dbd1821cf6
a-fast-successive-qp-algorithm-for-general
2212.06983
null
https://arxiv.org/abs/2212.06983v1
https://arxiv.org/pdf/2212.06983v1.pdf
A Fast Successive QP Algorithm for General Mean-Variance Portfolio Optimization
The mean and variance of portfolio returns are the standard quantities to measure the expected return and risk of a portfolio. Efficient portfolios that provide optimal trade-offs between mean and variance warrant consideration. To express a preference among these efficient portfolios, investors have put forward many mean-variance portfolio (MVP) formulations which date back to the classical Markowitz portfolio. However, most existing algorithms are highly specialized to particular formulations and cannot be generalized for broader applications. Therefore, a fast and unified algorithm would be extremely beneficial. In this paper, we first introduce a general MVP problem formulation that can fit most existing cases by exploring their commonalities. Then, we propose a widely applicable and provably convergent successive quadratic programming algorithm (SCQP) for the general formulation. The proposed algorithm can be implemented based on only the QP solvers and thus is computationally efficient. In addition, a fast implementation is considered to accelerate the algorithm. The numerical results show that our proposed algorithm significantly outperforms the state-of-the-art ones in terms of convergence speed and scalability.
['Daniel P. Palomar', 'Xiwen Wang', 'Shengjie Xiu']
2022-12-14
null
null
null
null
['portfolio-optimization']
['time-series']
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[5.036386489868164, 3.95029354095459]
bac47a84-096f-4f34-be69-5768f8fab8e5
bsp-net-generating-compact-meshes-via-binary
1911.06971
null
https://arxiv.org/abs/1911.06971v6
https://arxiv.org/pdf/1911.06971v6.pdf
BSP-Net: Generating Compact Meshes via Binary Space Partitioning
Polygonal meshes are ubiquitous in the digital 3D domain, yet they have only played a minor role in the deep learning revolution. Leading methods for learning generative models of shapes rely on implicit functions, and generate meshes only after expensive iso-surfacing routines. To overcome these challenges, we are inspired by a classical spatial data structure from computer graphics, Binary Space Partitioning (BSP), to facilitate 3D learning. The core ingredient of BSP is an operation for recursive subdivision of space to obtain convex sets. By exploiting this property, we devise BSP-Net, a network that learns to represent a 3D shape via convex decomposition. Importantly, BSP-Net is unsupervised since no convex shape decompositions are needed for training. The network is trained to reconstruct a shape using a set of convexes obtained from a BSP-tree built on a set of planes. The convexes inferred by BSP-Net can be easily extracted to form a polygon mesh, without any need for iso-surfacing. The generated meshes are compact (i.e., low-poly) and well suited to represent sharp geometry; they are guaranteed to be watertight and can be easily parameterized. We also show that the reconstruction quality by BSP-Net is competitive with state-of-the-art methods while using much fewer primitives. Code is available at https://github.com/czq142857/BSP-NET-original.
['Hao Zhang', 'Andrea Tagliasacchi', 'Zhiqin Chen']
2019-11-16
bsp-net-generating-compact-meshes-via-binary-1
http://openaccess.thecvf.com/content_CVPR_2020/html/Chen_BSP-Net_Generating_Compact_Meshes_via_Binary_Space_Partitioning_CVPR_2020_paper.html
http://openaccess.thecvf.com/content_CVPR_2020/papers/Chen_BSP-Net_Generating_Compact_Meshes_via_Binary_Space_Partitioning_CVPR_2020_paper.pdf
cvpr-2020-6
['3d-shape-representation']
['computer-vision']
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[8.671662330627441, -3.6393113136291504]
fd4b5232-eac9-4386-8146-4303dfa194c7
extended-fastslam-using-cellular-multipath
2301.07560
null
https://arxiv.org/abs/2301.07560v2
https://arxiv.org/pdf/2301.07560v2.pdf
Extended FastSLAM Using Cellular Multipath Component Delays and Angular Information
Opportunistic navigation using cellular signals is appealing for scenarios where other navigation technologies face challenges. In this paper, long-term evolution (LTE) downlink signals from two neighboring commercial base stations (BS) are received by a massive antenna array mounted on a passenger vehicle. Multipath component (MPC) delays and angle-of-arrival (AOA) extracted from the received signals are used to jointly estimate the positions of the vehicle, transmitters, and virtual transmitters (VT) with an extended fast simultaneous localization and mapping (FastSLAM) algorithm. The results show that the algorithm can accurately estimate the positions of the vehicle and the transmitters (and virtual transmitters). The vehicle's horizontal position error of SLAM fused with proprioception is less than 6 meters after a traversed distance of 530 meters, whereas un-aided proprioception results in a horizontal error of 15 meters.
['Fredrik Tufvesson', 'Russ Whiton', 'Junshi Chen']
2023-01-18
null
null
null
null
['simultaneous-localization-and-mapping']
['computer-vision']
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[6.266557216644287, 1.0977281332015991]
04780bec-f26f-40a8-bfa5-ca4a9e4ac5ec
open-source-hamnosys-parser-for-multilingual
2204.06924
null
https://arxiv.org/abs/2204.06924v3
https://arxiv.org/pdf/2204.06924v3.pdf
Handling sign language transcription system with the computer-friendly numerical multilabels
This paper presents our recent developments in the automatic processing of sign language corpora using the Hamburg Sign Language Annotation System (HamNoSys). We designed an automated tool to convert HamNoSys annotations into numerical labels for defined initial features of body and hand positions. Our proposed numerical multilabels greatly simplify annotations' structure without significant loss of gloss meaning. These numerical multilabels can potentially be used to feed the machine learning models, which would accelerate the development of vision-based sign language recognition. In addition, this tool can assist experts in the annotation process and help identify semantic errors. The code and sample annotations are publicly available at \url{https://github.com/hearai/parse-hamnosys}.
['Milena Olech', 'Marta Plantykow', 'Sylwia Majchrowska']
2022-04-14
null
null
null
null
['sign-language-recognition']
['computer-vision']
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[9.129755973815918, -6.428381443023682]
dc48ac40-ca61-46f6-9c72-82a6b045c6f5
reconstruction-guided-attention-improves-the
2209.13620
null
https://arxiv.org/abs/2209.13620v2
https://arxiv.org/pdf/2209.13620v2.pdf
Reconstruction-guided attention improves the robustness and shape processing of neural networks
Many visual phenomena suggest that humans use top-down generative or reconstructive processes to create visual percepts (e.g., imagery, object completion, pareidolia), but little is known about the role reconstruction plays in robust object recognition. We built an iterative encoder-decoder network that generates an object reconstruction and used it as top-down attentional feedback to route the most relevant spatial and feature information to feed-forward object recognition processes. We tested this model using the challenging out-of-distribution digit recognition dataset, MNIST-C, where 15 different types of transformation and corruption are applied to handwritten digit images. Our model showed strong generalization performance against various image perturbations, on average outperforming all other models including feedforward CNNs and adversarially trained networks. Our model is particularly robust to blur, noise, and occlusion corruptions, where shape perception plays an important role. Ablation studies further reveal two complementary roles of spatial and feature-based attention in robust object recognition, with the former largely consistent with spatial masking benefits in the attention literature (the reconstruction serves as a mask) and the latter mainly contributing to the model's inference speed (i.e., number of time steps to reach a certain confidence threshold) by reducing the space of possible object hypotheses. We also observed that the model sometimes hallucinates a non-existing pattern out of noise, leading to highly interpretable human-like errors. Our study shows that modeling reconstruction-based feedback endows AI systems with a powerful attention mechanism, which can help us understand the role of generating perception in human visual processing.
['Gregory J. Zelinsky', 'Hossein Adeli', 'Seoyoung Ahn']
2022-09-27
null
null
null
null
['object-reconstruction']
['computer-vision']
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[10.124659538269043, 2.3653786182403564]
5293e48f-7790-423d-878c-cc5e89358761
educational-multi-question-generation-for
null
null
https://aclanthology.org/2022.bea-1.26
https://aclanthology.org/2022.bea-1.26.pdf
Educational Multi-Question Generation for Reading Comprehension
Automated question generation has made great advances with the help of large NLP generation models. However, typically only one question is generated for each intended answer. We propose a new task, Multi-Question Generation, aimed at generating multiple semantically similar but lexically diverse questions assessing the same concept. We develop an evaluation framework based on desirable qualities of the resulting questions. Results comparing multiple question generation approaches in the two-question generation condition show a trade-off between question answerability and lexical diversity between the two questions. We also report preliminary results from sampling multiple questions from our model, to explore generating more than two questions. Our task can be used to further explore the educational impact of showing multiple distinct question wordings to students.
['Katherine Stasaski', 'Tony Tu', 'Manav Rathod']
null
null
null
null
naacl-bea-2022-7
['question-generation']
['natural-language-processing']
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[11.520038604736328, 8.101999282836914]
69cb75ca-bc59-4707-b74c-c28c841319d1
fine-grained-action-detection-with-rgb-and
2302.02755
null
https://arxiv.org/abs/2302.02755v1
https://arxiv.org/pdf/2302.02755v1.pdf
Fine-Grained Action Detection with RGB and Pose Information using Two Stream Convolutional Networks
As participants of the MediaEval 2022 Sport Task, we propose a two-stream network approach for the classification and detection of table tennis strokes. Each stream is a succession of 3D Convolutional Neural Network (CNN) blocks using attention mechanisms. Each stream processes different 4D inputs. Our method utilizes raw RGB data and pose information computed from MMPose toolbox. The pose information is treated as an image by applying the pose either on a black background or on the original RGB frame it has been computed from. Best performance is obtained by feeding raw RGB data to one stream, Pose + RGB (PRGB) information to the other stream and applying late fusion on the features. The approaches were evaluated on the provided TTStroke-21 data sets. We can report an improvement in stroke classification, reaching 87.3% of accuracy, while the detection does not outperform the baseline but still reaches an IoU of 0.349 and mAP of 0.110.
['Pierre-Etienne Martin', 'Finn Bartels', 'Leonard Hacker']
2023-02-06
null
null
null
null
['fine-grained-action-detection', 'action-classification', 'stroke-classification']
['computer-vision', 'computer-vision', 'methodology']
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[7.867064476013184, 0.0860719308257103]
a69dce0e-73e8-46fb-ba80-ddedea1a70d9
session-based-sequential-skip-prediction-via
1902.04743
null
http://arxiv.org/abs/1902.04743v1
http://arxiv.org/pdf/1902.04743v1.pdf
Session-based Sequential Skip Prediction via Recurrent Neural Networks
The focus of WSDM cup 2019 is session-based sequential skip prediction, i.e. predicting whether users will skip tracks, given their immediately preceding interactions in their listening session. This paper provides the solution of our team \textbf{ekffar} to this challenge. We focus on recurrent-neural-network-based deep learning approaches which have previously been shown to perform well on session-based recommendation problems. We show that by choosing an appropriate recurrent architecture that properly accounts for the given information such as user interaction features and song metadata, a single neural network could achieve a Mean Average Accuracy (AA) score of 0.648 on the withheld test data. Meanwhile, by ensembling several variants of the core model, the overall recommendation accuracy can be improved even further. By using the proposed approach, our team was able to attain the 1st place in the competition. We have open-sourced our implementation at GitHub.
['Lin Zhu', 'Yihong Chen']
2019-02-13
null
null
null
null
['sequential-skip-prediction']
['time-series']
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[15.61312198638916, 5.190537452697754]
6ff8cf64-f2d2-40bb-8509-e86eadf7b831
self-supervised-contrastive-attributed-graph
2110.08264
null
https://arxiv.org/abs/2110.08264v1
https://arxiv.org/pdf/2110.08264v1.pdf
Self-supervised Contrastive Attributed Graph Clustering
Attributed graph clustering, which learns node representation from node attribute and topological graph for clustering, is a fundamental but challenging task for graph analysis. Recently, methods based on graph contrastive learning (GCL) have obtained impressive clustering performance on this task. Yet, we observe that existing GCL-based methods 1) fail to benefit from imprecise clustering labels; 2) require a post-processing operation to get clustering labels; 3) cannot solve out-of-sample (OOS) problem. To address these issues, we propose a novel attributed graph clustering network, namely Self-supervised Contrastive Attributed Graph Clustering (SCAGC). In SCAGC, by leveraging inaccurate clustering labels, a self-supervised contrastive loss, which aims to maximize the similarities of intra-cluster nodes while minimizing the similarities of inter-cluster nodes, are designed for node representation learning. Meanwhile, a clustering module is built to directly output clustering labels by contrasting the representation of different clusters. Thus, for the OOS nodes, SCAGC can directly calculate their clustering labels. Extensive experimental results on four benchmark datasets have shown that SCAGC consistently outperforms 11 competitive clustering methods.
['Xinbo Gao', 'Ming Yang', 'Quanxue Gao', 'Wei Xia']
2021-10-15
null
null
null
null
['graph-clustering']
['graphs']
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[7.324424743652344, 5.968616485595703]
a5ccfd77-6fae-4ab3-aba3-52b5f967d451
reflection-removal-using-a-dual-pixel-sensor
null
null
http://openaccess.thecvf.com/content_CVPR_2019/html/Punnappurath_Reflection_Removal_Using_a_Dual-Pixel_Sensor_CVPR_2019_paper.html
http://openaccess.thecvf.com/content_CVPR_2019/papers/Punnappurath_Reflection_Removal_Using_a_Dual-Pixel_Sensor_CVPR_2019_paper.pdf
Reflection Removal Using a Dual-Pixel Sensor
Reflection removal is the challenging problem of removing unwanted reflections that occur when imaging a scene that is behind a pane of glass. In this paper, we show that most cameras have an overlooked mechanism that can greatly simplify this task. Specifically, modern DLSR and smartphone cameras use dual pixel (DP) sensors that have two photodiodes per pixel to provide two sub-aperture views of the scene from a single captured image. "Defocus-disparity" cues, which are natural by-products of the DP sensor encoded within these two sub-aperture views, can be used to distinguish between image gradients belonging to the in-focus background and those caused by reflection interference. This gradient information can then be incorporated into an optimization framework to recover the background layer with higher accuracy than currently possible from the single captured image. As part of this work, we provide the first image dataset for reflection removal consisting of the sub-aperture views from the DP sensor.
[' Michael S. Brown', 'Abhijith Punnappurath']
2019-06-01
null
null
null
cvpr-2019-6
['reflection-removal']
['computer-vision']
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[10.117599487304688, -2.8109686374664307]
483de1cd-8084-48e2-9d77-fe68d292dd5b
unified-gradient-reweighting-for-model
2010.13228
null
https://arxiv.org/abs/2010.13228v1
https://arxiv.org/pdf/2010.13228v1.pdf
Unified Gradient Reweighting for Model Biasing with Applications to Source Separation
Recent deep learning approaches have shown great improvement in audio source separation tasks. However, the vast majority of such work is focused on improving average separation performance, often neglecting to examine or control the distribution of the results. In this paper, we propose a simple, unified gradient reweighting scheme, with a lightweight modification to bias the learning process of a model and steer it towards a certain distribution of results. More specifically, we reweight the gradient updates of each batch, using a user-specified probability distribution. We apply this method to various source separation tasks, in order to shift the operating point of the models towards different objectives. We demonstrate different parameterizations of our unified reweighting scheme can be used towards addressing several real-world problems, such as unreliable separation estimates. Our framework enables the user to control a robustness trade-off between worst and average performance. Moreover, we experimentally show that our unified reweighting scheme can also be used in order to shift the focus of the model towards being more accurate for user-specified sound classes or even towards easier examples in order to enable faster convergence.
['Paris Smaragdis', 'Dimitrios Bralios', 'Efthymios Tzinis']
2020-10-25
null
null
null
null
['audio-source-separation']
['audio']
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[15.408809661865234, 5.601019859313965]
0d0f0627-c7e3-4939-a09a-3490d0080665
updet-universal-multi-agent-reinforcement
2101.08001
null
https://arxiv.org/abs/2101.08001v3
https://arxiv.org/pdf/2101.08001v3.pdf
UPDeT: Universal Multi-agent Reinforcement Learning via Policy Decoupling with Transformers
Recent advances in multi-agent reinforcement learning have been largely limited in training one model from scratch for every new task. The limitation is due to the restricted model architecture related to fixed input and output dimensions. This hinders the experience accumulation and transfer of the learned agent over tasks with diverse levels of difficulty (e.g. 3 vs 3 or 5 vs 6 multi-agent games). In this paper, we make the first attempt to explore a universal multi-agent reinforcement learning pipeline, designing one single architecture to fit tasks with the requirement of different observation and action configurations. Unlike previous RNN-based models, we utilize a transformer-based model to generate a flexible policy by decoupling the policy distribution from the intertwined input observation with an importance weight measured by the merits of the self-attention mechanism. Compared to a standard transformer block, the proposed model, named as Universal Policy Decoupling Transformer (UPDeT), further relaxes the action restriction and makes the multi-agent task's decision process more explainable. UPDeT is general enough to be plugged into any multi-agent reinforcement learning pipeline and equip them with strong generalization abilities that enables the handling of multiple tasks at a time. Extensive experiments on large-scale SMAC multi-agent competitive games demonstrate that the proposed UPDeT-based multi-agent reinforcement learning achieves significant results relative to state-of-the-art approaches, demonstrating advantageous transfer capability in terms of both performance and training speed (10 times faster).
['Xiaodan Liang', 'Xiaojun Chang', 'Fengda Zhu', 'Siyi Hu']
2021-01-20
null
null
null
null
['smac-1', 'smac']
['playing-games', 'playing-games']
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[3.860304594039917, 1.7740404605865479]
a5893ef2-58f6-47c7-bc5d-0e6a5d276386
comprehensive-privacy-analysis-on-federated
2205.11857
null
https://arxiv.org/abs/2205.11857v2
https://arxiv.org/pdf/2205.11857v2.pdf
Comprehensive Privacy Analysis on Federated Recommender System against Attribute Inference Attacks
In recent years, recommender systems are crucially important for the delivery of personalized services that satisfy users' preferences. With personalized recommendation services, users can enjoy a variety of recommendations such as movies, books, ads, restaurants, and more. Despite the great benefits, personalized recommendations typically require the collection of personal data for user modelling and analysis, which can make users susceptible to attribute inference attacks. Specifically, the vulnerability of existing centralized recommenders under attribute inference attacks leaves malicious attackers a backdoor to infer users' private attributes, as the systems remember information of their training data (i.e., interaction data and side information). An emerging practice is to implement recommender systems in the federated setting, which enables all user devices to collaboratively learn a shared global recommender while keeping all the training data on device. However, the privacy issues in federated recommender systems have been rarely explored. In this paper, we first design a novel attribute inference attacker to perform a comprehensive privacy analysis of the state-of-the-art federated recommender models. The experimental results show that the vulnerability of each model component against attribute inference attack is varied, highlighting the need for new defense approaches. Therefore, we propose a novel adaptive privacy-preserving approach to protect users' sensitive data in the presence of attribute inference attacks and meanwhile maximize the recommendation accuracy. Extensive experimental results on two real-world datasets validate the superior performance of our model on both recommendation effectiveness and resistance to inference attacks.
['Hongzhi Yin', 'Wei Yuan', 'Shijie Zhang']
2022-05-24
null
null
null
null
['inference-attack']
['adversarial']
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[5.902075290679932, 6.760597229003906]
532c1619-0dc9-4076-9063-68e092bec0fa
3d-pictorial-structures-revisited-multiple
null
null
https://ieeexplore.ieee.org/document/7360209/authors#authors
http://campar.in.tum.de/pub/belagiannis2016pami/belagiannis2016pami.pdf
3D Pictorial Structures Revisited: Multiple Human Pose Estimation
We address the problem of 3D pose estimation of multiple humans from multiple views. The transition from single to multiple human pose estimation and from the 2D to 3D space is challenging due to a much larger state space, occlusions and across-view ambiguities when not knowing the identity of the humans in advance. To address these problems, we first create a reduced state space by triangulation of corresponding pairs of body parts obtained by part detectors for each camera view. In order to resolve ambiguities of wrong and mixed parts of multiple humans after triangulation and also those coming from false positive detections, we introduce a 3D pictorial structures (3DPS) model. Our model builds on multi-view unary potentials, while a prior model is integrated into pairwise and ternary potential functions. To balance the potentials' influence, the model parameters are learnt using a Structured SVM (SSVM). The model is generic and applicable to both single and multiple human pose estimation. To evaluate our model on single and multiple human pose estimation, we rely on four different datasets. We first analyse the contribution of the potentials and then compare our results with related work where we demonstrate superior performance.
['Slobodan Ilic', 'Mykhaylo Andriluka', 'Vasileios Belagiannis', 'Nassir Navab', 'Sikandar Amin', 'Bernt Schiele']
2016-10-01
null
null
null
null
['3d-multi-person-pose-estimation']
['computer-vision']
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[7.045414924621582, -0.9893955588340759]
6cc269d3-295b-445d-9cd3-37b9551f36be
does-constituency-analysis-enhance-domain
2112.02955
null
https://arxiv.org/abs/2112.02955v1
https://arxiv.org/pdf/2112.02955v1.pdf
Does constituency analysis enhance domain-specific pre-trained BERT models for relation extraction?
Recently many studies have been conducted on the topic of relation extraction. The DrugProt track at BioCreative VII provides a manually-annotated corpus for the purpose of the development and evaluation of relation extraction systems, in which interactions between chemicals and genes are studied. We describe the ensemble system that we used for our submission, which combines predictions of fine-tuned bioBERT, sciBERT and const-bioBERT models by majority voting. We specifically tested the contribution of syntactic information to relation extraction with BERT. We observed that adding constituentbased syntactic information to BERT improved precision, but decreased recall, since relations rarely seen in the train set were less likely to be predicted by BERT models in which the syntactic information is infused. Our code is available online [https://github.com/Maple177/drugprot-relation-extraction].
['Claire Nédellec', 'Pierre Zweigenbaum', 'Robert Bossy', 'Louise Deléger', 'Anfu Tang']
2021-11-25
null
null
null
null
['drugprot']
['natural-language-processing']
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[8.469704627990723, 8.7819242477417]
e6c60932-d0bc-4ddf-8642-7188eb1e7c0b
noise-estimation-for-generative-diffusion
2104.02600
null
https://arxiv.org/abs/2104.02600v2
https://arxiv.org/pdf/2104.02600v2.pdf
Noise Estimation for Generative Diffusion Models
Generative diffusion models have emerged as leading models in speech and image generation. However, in order to perform well with a small number of denoising steps, a costly tuning of the set of noise parameters is needed. In this work, we present a simple and versatile learning scheme that can step-by-step adjust those noise parameters, for any given number of steps, while the previous work needs to retune for each number separately. Furthermore, without modifying the weights of the diffusion model, we are able to significantly improve the synthesis results, for a small number of steps. Our approach comes at a negligible computation cost.
['Lior Wolf', 'Eliya Nachmani', 'Robin San-Roman']
2021-04-06
null
null
null
null
['noise-estimation']
['medical']
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[15.123665809631348, 5.917774677276611]
cf8c677f-4ffc-4e7a-8f5a-072f0a53c7a5
cell-detection-on-image-based-immunoassays
1810.09707
null
http://arxiv.org/abs/1810.09707v1
http://arxiv.org/pdf/1810.09707v1.pdf
Cell detection on image-based immunoassays
Cell detection and counting in the image-based ELISPOT and Fluorospot immunoassays is considered a bottleneck. The task has remained hard to automatize, and biomedical researchers often have to rely on results that are not accurate. Previously proposed solutions are heuristic, and data-based solutions are subject to a lack of objective ground truth data. In this paper, we analyze a partial differential equations model for ELISPOT, Fluorospot, and assays of similar design. This leads us to a mathematical observation model for the images generated by these assays. We use this model to motivate a methodology for cell detection. Finally, we provide a real-data example that suggests that this cell detection methodology and a human expert perform comparably.
[]
2018-10-23
null
null
null
null
['cell-detection']
['computer-vision']
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[14.169873237609863, -3.164111852645874]
386bef42-f868-40f5-bb11-ade76b249b66
when-fair-classification-meets-noisy
2307.03306
null
https://arxiv.org/abs/2307.03306v2
https://arxiv.org/pdf/2307.03306v2.pdf
When Fair Classification Meets Noisy Protected Attributes
The operationalization of algorithmic fairness comes with several practical challenges, not the least of which is the availability or reliability of protected attributes in datasets. In real-world contexts, practical and legal impediments may prevent the collection and use of demographic data, making it difficult to ensure algorithmic fairness. While initial fairness algorithms did not consider these limitations, recent proposals aim to achieve algorithmic fairness in classification by incorporating noisiness in protected attributes or not using protected attributes at all. To the best of our knowledge, this is the first head-to-head study of fair classification algorithms to compare attribute-reliant, noise-tolerant and attribute-blind algorithms along the dual axes of predictivity and fairness. We evaluated these algorithms via case studies on four real-world datasets and synthetic perturbations. Our study reveals that attribute-blind and noise-tolerant fair classifiers can potentially achieve similar level of performance as attribute-reliant algorithms, even when protected attributes are noisy. However, implementing them in practice requires careful nuance. Our study provides insights into the practical implications of using fair classification algorithms in scenarios where protected attributes are noisy or partially available.
['Christo Wilson', 'Pablo Kvitca', 'Avijit Ghosh']
2023-07-06
null
null
null
null
['fairness', 'classification-1', 'fairness']
['computer-vision', 'methodology', 'miscellaneous']
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[8.844497680664062, 5.304582118988037]
9870d5f0-4653-4d05-a11a-f565f79eb877
mattnet-modular-attention-network-for
1801.08186
null
http://arxiv.org/abs/1801.08186v3
http://arxiv.org/pdf/1801.08186v3.pdf
MAttNet: Modular Attention Network for Referring Expression Comprehension
In this paper, we address referring expression comprehension: localizing an image region described by a natural language expression. While most recent work treats expressions as a single unit, we propose to decompose them into three modular components related to subject appearance, location, and relationship to other objects. This allows us to flexibly adapt to expressions containing different types of information in an end-to-end framework. In our model, which we call the Modular Attention Network (MAttNet), two types of attention are utilized: language-based attention that learns the module weights as well as the word/phrase attention that each module should focus on; and visual attention that allows the subject and relationship modules to focus on relevant image components. Module weights combine scores from all three modules dynamically to output an overall score. Experiments show that MAttNet outperforms previous state-of-art methods by a large margin on both bounding-box-level and pixel-level comprehension tasks. Demo and code are provided.
['Jimei Yang', 'Xiaohui Shen', 'Xin Lu', 'Tamara L. Berg', 'Licheng Yu', 'Zhe Lin', 'Mohit Bansal']
2018-01-24
mattnet-modular-attention-network-for-1
http://openaccess.thecvf.com/content_cvpr_2018/html/Yu_MAttNet_Modular_Attention_CVPR_2018_paper.html
http://openaccess.thecvf.com/content_cvpr_2018/papers/Yu_MAttNet_Modular_Attention_CVPR_2018_paper.pdf
cvpr-2018-6
['generalized-referring-expression-segmentation', 'referring-expression-segmentation']
['computer-vision', 'computer-vision']
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[10.458418846130371, 1.392624020576477]
71eda82f-9fc0-401b-98d6-1ac6e9772a5a
idea-interpretable-dynamic-ensemble
2201.05336
null
https://arxiv.org/abs/2201.05336v1
https://arxiv.org/pdf/2201.05336v1.pdf
IDEA: Interpretable Dynamic Ensemble Architecture for Time Series Prediction
We enhance the accuracy and generalization of univariate time series point prediction by an explainable ensemble on the fly. We propose an Interpretable Dynamic Ensemble Architecture (IDEA), in which interpretable base learners give predictions independently with sparse communication as a group. The model is composed of several sequentially stacked groups connected by group backcast residuals and recurrent input competition. Ensemble driven by end-to-end training both horizontally and vertically brings state-of-the-art (SOTA) performances. Forecast accuracy improves by 2.6% over the best statistical benchmark on the TOURISM dataset and 2% over the best deep learning benchmark on the M4 dataset. The architecture enjoys several advantages, being applicable to time series from various domains, explainable to users with specialized modular structure and robust to changes in task distribution.
['Tong Zhang', 'Kani Chen', 'Mengyue Zha']
2022-01-14
null
null
null
null
['time-series-prediction']
['time-series']
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[6.9954986572265625, 3.0992963314056396]
1b73c128-a9d0-4841-a6e2-52ba4cce3c4f
captioning-near-future-activity-sequences
1908.00943
null
https://arxiv.org/abs/1908.00943v5
https://arxiv.org/pdf/1908.00943v5.pdf
Prediction and Description of Near-Future Activities in Video
Most of the existing works on human activity analysis focus on recognition or early recognition of the activity labels from complete or partial observations. Similarly, almost all of the existing video captioning approaches focus on the observed events in videos. Predicting the labels and the captions of future activities where no frames of the predicted activities have been observed is a challenging problem, with important applications that require anticipatory response. In this work, we propose a system that can infer the labels and the captions of a sequence of future activities. Our proposed network for label prediction of a future activity sequence has three branches where the first branch takes visual features from the objects present in the scene, the second branch takes observed sequential activity features, and the third branch captures the last observed activity features. The predicted labels and the observed scene context are then mapped to meaningful captions using a sequence-to-sequence learning-based method. Experiments on four challenging activity analysis datasets and a video description dataset demonstrate that our label prediction approach achieves comparable performance with the state-of-the-arts and our captioning framework outperform the state-of-the-arts.
['Amit K. Roy-Chowdhury', 'Mahmudul Hasan', 'Tahmida Mahmud', 'Mohammad Billah']
2019-08-02
null
null
null
null
['video-description']
['computer-vision']
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[8.500168800354004, 0.6015111804008484]
06775c4f-f626-4f2c-be73-62882290f698
carbon-aware-ev-charging
2209.12373
null
https://arxiv.org/abs/2209.12373v1
https://arxiv.org/pdf/2209.12373v1.pdf
Carbon-Aware EV Charging
This paper examines the problem of optimizing the charging pattern of electric vehicles (EV) by taking real-time electricity grid carbon intensity into consideration. The objective of the proposed charging scheme is to minimize the carbon emissions contributed by EV charging events, while simultaneously satisfying constraints posed by EV user's charging schedules, charging station transformer limits, and battery physical constraints. Using real-world EV charging data and California electricity generation records, this paper shows that our carbon-aware real-time charging scheme saves an average of 3.81% of carbon emission while delivering satisfactory amount of energy. Furthermore, by using an adaptive balanced factor, we can reduce 26.00% of carbon emission on average while compromising 12.61% of total energy delivered.
['Yize Chen', 'Yuanyuan Shi', 'Yuexin Bian', 'Kai-Wen Cheng']
2022-09-26
null
null
null
null
['total-energy']
['miscellaneous']
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[5.6335673332214355, 2.359947443008423]
1a97aa92-d067-4e52-8bdc-04ca3409d322
structuring-representation-geometry-with
2306.13924
null
https://arxiv.org/abs/2306.13924v1
https://arxiv.org/pdf/2306.13924v1.pdf
Structuring Representation Geometry with Rotationally Equivariant Contrastive Learning
Self-supervised learning converts raw perceptual data such as images to a compact space where simple Euclidean distances measure meaningful variations in data. In this paper, we extend this formulation by adding additional geometric structure to the embedding space by enforcing transformations of input space to correspond to simple (i.e., linear) transformations of embedding space. Specifically, in the contrastive learning setting, we introduce an equivariance objective and theoretically prove that its minima forces augmentations on input space to correspond to rotations on the spherical embedding space. We show that merely combining our equivariant loss with a non-collapse term results in non-trivial representations, without requiring invariance to data augmentations. Optimal performance is achieved by also encouraging approximate invariance, where input augmentations correspond to small rotations. Our method, CARE: Contrastive Augmentation-induced Rotational Equivariance, leads to improved performance on downstream tasks, and ensures sensitivity in embedding space to important variations in data (e.g., color) that standard contrastive methods do not achieve. Code is available at https://github.com/Sharut/CARE.
['Stefanie Jegelka', 'Soledad Villar', 'Derek Lim', 'Joshua Robinson', 'Sharut Gupta']
2023-06-24
null
null
null
null
['contrastive-learning', 'self-supervised-learning', 'contrastive-learning']
['computer-vision', 'computer-vision', 'methodology']
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[9.043534278869629, 2.8060855865478516]
a481a658-92fa-471c-b06b-5b3456cb6ab2
task-driven-and-experience-based-question
null
null
https://aclanthology.org/2022.lrec-1.670
https://aclanthology.org/2022.lrec-1.670.pdf
Task-Driven and Experience-Based Question Answering Corpus for In-Home Robot Application in the House3D Virtual Environment
At present, more and more work has begun to pay attention to the long-term housekeeping robot scene. Naturally, we wonder whether the robot can answer the questions raised by the owner according to the actual situation at home. These questions usually do not have a clear text context, are directly related to the actual scene, and it is difficult to find the answer from the general knowledge base (such as Wikipedia). Therefore, the experience accumulated from the task seems to be a more natural choice. We present a corpus called TEQA (task-driven and experience-based question answering) in the long-term household task. Based on a popular in-house virtual environment (AI2-THOR) and agent task experiences of ALFRED, we design six types of questions along with answering including 24 question templates, 37 answer templates, and nearly 10k different question answering pairs. Our corpus aims at investigating the ability of task experience understanding of agents for the daily question answering scenario on the ALFRED dataset.
['Yang Liu', 'Liubo Ouyang', 'Zhuoqun Xu']
null
null
null
null
lrec-2022-6
['general-knowledge']
['miscellaneous']
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[4.446498394012451, 0.6592406630516052]
fea6a145-393d-4c1d-8c68-14be81a99b11
logo-net-large-scale-deep-logo-detection-and
1511.02462
null
http://arxiv.org/abs/1511.02462v2
http://arxiv.org/pdf/1511.02462v2.pdf
LOGO-Net: Large-scale Deep Logo Detection and Brand Recognition with Deep Region-based Convolutional Networks
Logo detection from images has many applications, particularly for brand recognition and intellectual property protection. Most existing studies for logo recognition and detection are based on small-scale datasets which are not comprehensive enough when exploring emerging deep learning techniques. In this paper, we introduce "LOGO-Net", a large-scale logo image database for logo detection and brand recognition from real-world product images. To facilitate research, LOGO-Net has two datasets: (i)"logos-18" consists of 18 logo classes, 10 brands, and 16,043 logo objects, and (ii) "logos-160" consists of 160 logo classes, 100 brands, and 130,608 logo objects. We describe the ideas and challenges for constructing such a large-scale database. Another key contribution of this work is to apply emerging deep learning techniques for logo detection and brand recognition tasks, and conduct extensive experiments by exploring several state-of-the-art deep region-based convolutional networks techniques for object detection tasks. The LOGO-net will be released at http://logo-net.org/
['Hui Xue', 'Steven C. H. Hoi', 'Qiang Wu', 'Hantang Liu', 'Yue Wu', 'Xiongwei Wu', 'Huiqiong Wang']
2015-11-08
null
null
null
null
['logo-recognition']
['computer-vision']
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[9.32280158996582, 1.3059922456741333]
f77ec3f8-03e2-4b12-86fb-5c926e95889c
visual-knowledge-tracing
2207.10157
null
https://arxiv.org/abs/2207.10157v2
https://arxiv.org/pdf/2207.10157v2.pdf
Visual Knowledge Tracing
Each year, thousands of people learn new visual categorization tasks -- radiologists learn to recognize tumors, birdwatchers learn to distinguish similar species, and crowd workers learn how to annotate valuable data for applications like autonomous driving. As humans learn, their brain updates the visual features it extracts and attend to, which ultimately informs their final classification decisions. In this work, we propose a novel task of tracing the evolving classification behavior of human learners as they engage in challenging visual classification tasks. We propose models that jointly extract the visual features used by learners as well as predicting the classification functions they utilize. We collect three challenging new datasets from real human learners in order to evaluate the performance of different visual knowledge tracing methods. Our results show that our recurrent models are able to predict the classification behavior of human learners on three challenging medical image and species identification tasks.
['Oisin Mac Aodha', 'Pietro Perona', 'Neehar Kondapaneni']
2022-07-20
null
null
null
null
['classification']
['methodology']
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[9.77791690826416, 2.083139419555664]
8d82b9cd-cff6-4c26-9f88-1bf30e14e2b0
zoho-at-semeval-2019-task-9-semi-supervised
1902.10623
null
http://arxiv.org/abs/1902.10623v2
http://arxiv.org/pdf/1902.10623v2.pdf
Zoho at SemEval-2019 Task 9: Semi-supervised Domain Adaptation using Tri-training for Suggestion Mining
This paper describes our submission for the SemEval-2019 Suggestion Mining task. A simple Convolutional Neural Network (CNN) classifier with contextual word representations from a pre-trained language model was used for sentence classification. The model is trained using tri-training, a semi-supervised bootstrapping mechanism for labelling unseen data. Tri-training proved to be an effective technique to accommodate domain shift for cross-domain suggestion mining (Subtask B) where there is no hand labelled training data. For in-domain evaluation (Subtask A), we use the same technique to augment the training set. Our system ranks thirteenth in Subtask A with an $F_1$-score of 68.07 and third in Subtask B with an $F_1$-score of 81.94.
['Sri Ananda Seelan', 'Sai Prasanna']
2019-02-27
zoho-at-semeval-2019-task-9-semi-supervised-1
https://aclanthology.org/S19-2225
https://aclanthology.org/S19-2225.pdf
semeval-2019-6
['suggestion-mining']
['natural-language-processing']
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[10.86599349975586, 7.60838508605957]
b913126a-bff9-44eb-985c-cda2e6dee8be
lagrange-motion-analysis-and-view-embeddings
null
null
http://openaccess.thecvf.com//content/CVPR2022/html/Chai_Lagrange_Motion_Analysis_and_View_Embeddings_for_Improved_Gait_Recognition_CVPR_2022_paper.html
http://openaccess.thecvf.com//content/CVPR2022/papers/Chai_Lagrange_Motion_Analysis_and_View_Embeddings_for_Improved_Gait_Recognition_CVPR_2022_paper.pdf
Lagrange Motion Analysis and View Embeddings for Improved Gait Recognition
Gait is considered the walking pattern of human body, which includes both shape and motion cues. However, the main-stream appearance-based methods for gait recognition rely on the shape of silhouette. It is unclear whether motion can be explicitly represented in the gait sequence modeling. In this paper, we analyzed human walking using the Lagrange's equation and come to the conclusion that second-order information in the temporal dimension is necessary for identification. We designed a second-order motion extraction module based on the conclusions drawn. Also, a light weight view-embedding module is designed by analyzing the problem that current methods to cross-view task do not take view itself into consideration explicitly. Experiments on CASIA-B and OU-MVLP datasets show the effectiveness of our method and some visualization for extracted motion are done to show the interpretability of our motion extraction module.
['Yunhong Wang', 'Zilong Li', 'Shaoxiong Zhang', 'Annan Li', 'Tianrui Chai']
2022-01-01
null
null
null
cvpr-2022-1
['gait-recognition']
['computer-vision']
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[14.227476119995117, 1.436474323272705]
624cceb2-9ad6-4841-83ee-9d4f892d28cb
parametric-reshaping-of-portraits-in-videos
2205.02538
null
https://arxiv.org/abs/2205.02538v1
https://arxiv.org/pdf/2205.02538v1.pdf
Parametric Reshaping of Portraits in Videos
Sharing short personalized videos to various social media networks has become quite popular in recent years. This raises the need for digital retouching of portraits in videos. However, applying portrait image editing directly on portrait video frames cannot generate smooth and stable video sequences. To this end, we present a robust and easy-to-use parametric method to reshape the portrait in a video to produce smooth retouched results. Given an input portrait video, our method consists of two main stages: stabilized face reconstruction, and continuous video reshaping. In the first stage, we start by estimating face rigid pose transformations across video frames. Then we jointly optimize multiple frames to reconstruct an accurate face identity, followed by recovering face expressions over the entire video. In the second stage, we first reshape the reconstructed 3D face using a parametric reshaping model reflecting the weight change of the face, and then utilize the reshaped 3D face to guide the warping of video frames. We develop a novel signed distance function based dense mapping method for the warping between face contours before and after reshaping, resulting in stable warped video frames with minimum distortions. In addition, we use the 3D structure of the face to correct the dense mapping to achieve temporal consistency. We generate the final result by minimizing the background distortion through optimizing a content-aware warping mesh. Extensive experiments show that our method is able to create visually pleasing results by adjusting a simple reshaping parameter, which facilitates portrait video editing for social media and visual effects.
['Xiaogang Jin', 'Yong-Liang Yang', 'Wenxin Sun', 'Xiangjun Tang']
2022-05-05
null
null
null
null
['face-reconstruction']
['computer-vision']
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[12.781636238098145, -0.2935020327568054]
3cfb4e7e-c838-47eb-969f-44586af45d23
integrated-triaging-for-fast-reading
1909.13128
null
https://arxiv.org/abs/1909.13128v1
https://arxiv.org/pdf/1909.13128v1.pdf
Integrated Triaging for Fast Reading Comprehension
Although according to several benchmarks automatic machine reading comprehension (MRC) systems have recently reached super-human performance, less attention has been paid to their computational efficiency. However, efficiency is of crucial importance for training and deployment in real world applications. This paper introduces Integrated Triaging, a framework that prunes almost all context in early layers of a network, leaving the remaining (deep) layers to scan only a tiny fraction of the full corpus. This pruning drastically increases the efficiency of MRC models and further prevents the later layers from overfitting to prevalent short paragraphs in the training set. Our framework is extremely flexible and naturally applicable to a wide variety of models. Our experiment on doc-SQuAD and TriviaQA tasks demonstrates its effectiveness in consistently improving both speed and quality of several diverse MRC models.
['Boyi Li', 'Kilian Q. Weinberger', 'Ni Lao', 'John Blitzer', 'Lequn Wang', 'Felix Wu']
2019-09-28
null
null
null
null
['triviaqa']
['miscellaneous']
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[11.174077033996582, 8.301637649536133]
4a5abd84-53c7-499e-98ff-2f816ffb1e76
learning-to-view-decision-transformers-for
2301.09544
null
https://arxiv.org/abs/2301.09544v1
https://arxiv.org/pdf/2301.09544v1.pdf
Learning to View: Decision Transformers for Active Object Detection
Active perception describes a broad class of techniques that couple planning and perception systems to move the robot in a way to give the robot more information about the environment. In most robotic systems, perception is typically independent of motion planning. For example, traditional object detection is passive: it operates only on the images it receives. However, we have a chance to improve the results if we allow planning to consume detection signals and move the robot to collect views that maximize the quality of the results. In this paper, we use reinforcement learning (RL) methods to control the robot in order to obtain images that maximize the detection quality. Specifically, we propose using a Decision Transformer with online fine-tuning, which first optimizes the policy with a pre-collected expert dataset and then improves the learned policy by exploring better solutions in the environment. We evaluate the performance of proposed method on an interactive dataset collected from an indoor scenario simulator. Experimental results demonstrate that our method outperforms all baselines, including expert policy and pure offline RL methods. We also provide exhaustive analyses of the reward distribution and observation space.
['Arnie Sen', 'Rajasimman Madhivanan', 'Ding Zhao', 'Xuewei Qi', 'Mohit Deshpande', 'Nathalie Majcherczyk', 'Wenhao Ding']
2023-01-23
null
null
null
null
['active-object-detection', 'motion-planning']
['computer-vision', 'robots']
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[4.61674690246582, 0.827681303024292]
f93876a9-2d5e-4a8f-9eec-96ca255ba5ae
ear-u-net-efficientnet-and-attention-based
2110.01014
null
https://arxiv.org/abs/2110.01014v1
https://arxiv.org/pdf/2110.01014v1.pdf
EAR-U-Net: EfficientNet and attention-based residual U-Net for automatic liver segmentation in CT
Purpose: This paper proposes a new network framework called EAR-U-Net, which leverages EfficientNetB4, attention gate, and residual learning techniques to achieve automatic and accurate liver segmentation. Methods: The proposed method is based on the U-Net framework. First, we use EfficientNetB4 as the encoder to extract more feature information during the encoding stage. Then, an attention gate is introduced in the skip connection to eliminate irrelevant regions and highlight features of a specific segmentation task. Finally, to alleviate the problem of gradient vanishment, we replace the traditional convolution of the decoder with a residual block to improve the segmentation accuracy. Results: We verified the proposed method on the LiTS17 and SLiver07 datasets and compared it with classical networks such as FCN, U-Net, Attention U-Net, and Attention Res-U-Net. In the Sliver07 evaluation, the proposed method achieved the best segmentation performance on all five standard metrics. Meanwhile, in the LiTS17 assessment, the best performance is obtained except for a slight inferior on RVD. Moreover, we also participated in the MICCIA-LiTS17 challenge, and the Dice per case score was 0.952. Conclusion: The proposed method's qualitative and quantitative results demonstrated its applicability in liver segmentation and proved its good prospect in computer-assisted liver segmentation.
['Haiying Wang', 'Lubiao Zhou', 'Peiqing Lv', 'Xiangyang Zhang', 'Jinke Wang']
2021-10-03
null
null
null
null
['liver-segmentation']
['medical']
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[14.558320045471191, -2.6657490730285645]
59671223-f87c-4150-9997-d15f6b594053
stay-on-topic-with-classifier-free-guidance
2306.17806
null
https://arxiv.org/abs/2306.17806v1
https://arxiv.org/pdf/2306.17806v1.pdf
Stay on topic with Classifier-Free Guidance
Classifier-Free Guidance (CFG) has recently emerged in text-to-image generation as a lightweight technique to encourage prompt-adherence in generations. In this work, we demonstrate that CFG can be used broadly as an inference-time technique in pure language modeling. We show that CFG (1) improves the performance of Pythia, GPT-2 and LLaMA-family models across an array of tasks: Q\&A, reasoning, code generation, and machine translation, achieving SOTA on LAMBADA with LLaMA-7B over PaLM-540B; (2) brings improvements equivalent to a model with twice the parameter-count; (3) can stack alongside other inference-time methods like Chain-of-Thought and Self-Consistency, yielding further improvements in difficult tasks; (4) can be used to increase the faithfulness and coherence of assistants in challenging form-driven and content-driven prompts: in a human evaluation we show a 75\% preference for GPT4All using CFG over baseline.
['Stella Biderman', 'Pawan Sasanka Ammanamanchi', 'Elad Levi', 'Alexander Spangher', 'Honglu Fan', 'Guillaume Sanchez']
2023-06-30
null
null
null
null
['code-generation', 'image-generation', 'zero-shot-learning', 'text-generation', 'machine-translation', 'lambada', 'common-sense-reasoning']
['computer-code', 'computer-vision', 'methodology', 'natural-language-processing', 'natural-language-processing', 'natural-language-processing', 'reasoning']
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[11.538152694702148, 8.770659446716309]
fa984957-44f6-40a6-8961-5915c9e5de42
adversarial-machine-learning-based
2208.05073
null
https://arxiv.org/abs/2208.05073v1
https://arxiv.org/pdf/2208.05073v1.pdf
Adversarial Machine Learning-Based Anticipation of Threats Against Vehicle-to-Microgrid Services
In this paper, we study the expanding attack surface of Adversarial Machine Learning (AML) and the potential attacks against Vehicle-to-Microgrid (V2M) services. We present an anticipatory study of a multi-stage gray-box attack that can achieve a comparable result to a white-box attack. Adversaries aim to deceive the targeted Machine Learning (ML) classifier at the network edge to misclassify the incoming energy requests from microgrids. With an inference attack, an adversary can collect real-time data from the communication between smart microgrids and a 5G gNodeB to train a surrogate (i.e., shadow) model of the targeted classifier at the edge. To anticipate the associated impact of an adversary's capability to collect real-time data instances, we study five different cases, each representing different amounts of real-time data instances collected by an adversary. Out of six ML models trained on the complete dataset, K-Nearest Neighbour (K-NN) is selected as the surrogate model, and through simulations, we demonstrate that the multi-stage gray-box attack is able to mislead the ML classifier and cause an Evasion Increase Rate (EIR) up to 73.2% using 40% less data than what a white-box attack needs to achieve a similar EIR.
['Burak Kantarci', 'Ahmed Omara']
2022-08-09
null
null
null
null
['inference-attack']
['adversarial']
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[5.560283660888672, 7.491052150726318]
c96e7945-0585-4a08-b054-00cfa4c71424
countering-the-influence-of-essay-length-in
null
null
https://aclanthology.org/2021.sustainlp-1.4
https://aclanthology.org/2021.sustainlp-1.4.pdf
Countering the Influence of Essay Length in Neural Essay Scoring
Previous work has shown that automated essay scoring systems, in particular machine learning-based systems, are not capable of assessing the quality of essays, but are relying on essay length, a factor irrelevant to writing proficiency. In this work, we first show that state-of-the-art systems, recent neural essay scoring systems, might be also influenced by the correlation between essay length and scores in a standard dataset. In our evaluation, a very simple neural model shows the state-of-the-art performance on the standard dataset. To consider essay content without taking essay length into account, we introduce a simple neural model assessing the similarity of content between an input essay and essays assigned different scores. This neural model achieves performance comparable to the state of the art on a standard dataset as well as on a second dataset. Our findings suggest that neural essay scoring systems should consider the characteristics of datasets to focus on text quality.
['Michael Strube', 'Sungho Jeon']
null
null
null
null
emnlp-sustainlp-2021-11
['automated-essay-scoring']
['natural-language-processing']
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[11.285841941833496, 9.352557182312012]
2775557a-5dc6-4ac6-9fd1-61235f64d964
a-dynamic-mode-decomposition-approach-for
2203.00004
null
https://arxiv.org/abs/2203.00004v2
https://arxiv.org/pdf/2203.00004v2.pdf
A Dynamic Mode Decomposition Approach for Decentralized Spectral Clustering of Graphs
We propose a novel robust decentralized graph clustering algorithm that is provably equivalent to the popular spectral clustering approach. Our proposed method uses the existing wave equation clustering algorithm that is based on propagating waves through the graph. However, instead of using a fast Fourier transform (FFT) computation at every node, our proposed approach exploits the Koopman operator framework. Specifically, we show that propagating waves in the graph followed by a local dynamic mode decomposition (DMD) computation at every node is capable of retrieving the eigenvalues and the local eigenvector components of the graph Laplacian, thereby providing local cluster assignments for all nodes. We demonstrate that the DMD computation is more robust than the existing FFT based approach and requires 20 times fewer steps of the wave equation to accurately recover the clustering information and reduces the relative error by orders of magnitude. We demonstrate the decentralized approach on a range of graph clustering problems.
['Tuhin Sahai', 'Stefan Klus', 'Hongyu Zhu']
2022-02-26
null
null
null
null
['graph-clustering']
['graphs']
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[7.076850891113281, 5.071138381958008]
d9f087a8-295b-42af-af8d-4a85433857bb
r-2-range-regularization-for-model
2303.08253
null
https://arxiv.org/abs/2303.08253v1
https://arxiv.org/pdf/2303.08253v1.pdf
R^2: Range Regularization for Model Compression and Quantization
Model parameter regularization is a widely used technique to improve generalization, but also can be used to shape the weight distributions for various purposes. In this work, we shed light on how weight regularization can assist model quantization and compression techniques, and then propose range regularization (R^2) to further boost the quality of model optimization by focusing on the outlier prevention. By effectively regulating the minimum and maximum weight values from a distribution, we mold the overall distribution into a tight shape so that model compression and quantization techniques can better utilize their limited numeric representation powers. We introduce L-inf regularization, its extension margin regularization and a new soft-min-max regularization to be used as a regularization loss during full-precision model training. Coupled with state-of-the-art quantization and compression techniques, models trained with R^2 perform better on an average, specifically at lower bit weights with 16x compression ratio. We also demonstrate that R^2 helps parameter constrained models like MobileNetV1 achieve significant improvement of around 8% for 2 bit quantization and 7% for 1 bit compression.
['Saurabh Adya', 'Minsik Cho', 'Srijan Mishra', 'Chungkuk Yoo', 'Arnav Kundu']
2023-03-14
null
null
null
null
['model-compression']
['methodology']
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[8.65261459350586, 3.264244794845581]
19bff1ff-8598-4adf-8c32-031a3394de67
attribute-value-generation-from-product-title
null
null
https://aclanthology.org/2021.ecnlp-1.2
https://aclanthology.org/2021.ecnlp-1.2.pdf
Attribute Value Generation from Product Title using Language Models
Identifying the value of product attribute is essential for many e-commerce functions such as product search and product recommendations. Therefore, identifying attribute values from unstructured product descriptions is a critical undertaking for any e-commerce retailer. What makes this problem challenging is the diversity of product types and their attributes and values. Existing methods have typically employed multiple types of machine learning models, each of which handles specific product types or attribute classes. This has limited their scalability and generalization for large scale real world e-commerce applications. Previous approaches for this task have formulated the attribute value extraction as a Named Entity Recognition (NER) task or a Question Answering (QA) task. In this paper we have presented a generative approach to the attribute value extraction problem using language models. We leverage the large-scale pretraining of the GPT-2 and the T5 text-to-text transformer to create fine-tuned models that can effectively perform this task. We show that a single general model is very effective for this task over a broad set of product attribute values with the open world assumption. Our approach achieves state-of-the-art performance for different attribute classes, which has previously required a diverse set of models.
['Manish Pandey', 'Pawan Goyal', 'Kalyani Roy']
null
null
null
null
acl-ecnlp-2021-8
['attribute-value-extraction']
['natural-language-processing']
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[9.975106239318848, 6.28148889541626]
f4cfee60-f07b-4b29-a0ac-a273b68b40bb
framework-for-2d-ad-placements-in-lineartv
2212.02450
null
https://arxiv.org/abs/2212.02450v1
https://arxiv.org/pdf/2212.02450v1.pdf
Framework for 2D Ad placements in LinearTV
Virtual Product placement(VPP) is the advertising technique of digitally placing a branded object into the scene of a movie or TV show. This type of advertising provides the ability for brands to reach consumers without interrupting the viewing experience with a commercial break, as the products are seen in the background or as props. Despite this being a billion-dollar industry, ad rendering technique is currently executed at post production stage, manually either with the help of VFx artists or through semi-automated solutions. In this paper, we demonstrate a fully automated framework to digitally place 2-D ads in linear TV cooking shows captured using single-view camera with small camera movements. Without access to full video or production camera configuration, this framework performs the following tasks (i) identifying empty space for 2-D ad placement (ii) kitchen scene understanding (iii) occlusion handling (iv) ambient lighting and (v) ad tracking.
['Sia Gholami', 'Karan Sindwani', 'Divya Bhargavi']
2022-12-05
null
null
null
null
['occlusion-handling']
['computer-vision']
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[9.407934188842773, -2.6435210704803467]
1989d763-434b-4e2c-9469-67adabc94182
amrnet-chips-augmentation-in-areial-images
2009.07168
null
https://arxiv.org/abs/2009.07168v2
https://arxiv.org/pdf/2009.07168v2.pdf
AMRNet: Chips Augmentation in Aerial Images Object Detection
Object detection in aerial images is a challenging task due to the following reasons: (1) objects are small and dense relative to images; (2) the object scale varies in a wide range; (3) the number of object in different classes is imbalanced. Many current methods adopt cropping idea: splitting high resolution images into serials subregions (chips) and detecting on them. However, some problems such as scale variation, object sparsity, and class imbalance exist in the process of training network with chips. In this work, three augmentation methods are introduced to relieve these problems. Specifically, we propose a scale adaptive module, which dynamically adjusts chip size to balance object scale, narrowing scale variation in training. In addtion, we introduce mosaic to augment datasets, relieving object sparity problem. To balance catgory, we present mask resampling to paste object in chips with panoramic segmentation. Our model achieves state-of-the-art perfomance on two popular aerial image datasets of VisDrone and UAVDT. Remarkably, three methods can be independently applied to detectiors, increasing performance steady without the sacrifice of inference efficiency.
['Hongpeng Wang', 'Ye Tian', 'Xinghao Song', 'Zhiwei Wei', 'Chenzhen Duan']
2020-09-15
null
null
null
null
['object-detection-in-aerial-images']
['computer-vision']
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[8.741085052490234, -0.7671900987625122]
9867e3b5-a5d3-4e28-892f-8e123a827ff7
tbi-gan-an-adversarial-learning-approach-for
2208.06099
null
https://arxiv.org/abs/2208.06099v1
https://arxiv.org/pdf/2208.06099v1.pdf
TBI-GAN: An Adversarial Learning Approach for Data Synthesis on Traumatic Brain Segmentation
Brain network analysis for traumatic brain injury (TBI) patients is critical for its consciousness level assessment and prognosis evaluation, which requires the segmentation of certain consciousness-related brain regions. However, it is difficult to construct a TBI segmentation model as manually annotated MR scans of TBI patients are hard to collect. Data augmentation techniques can be applied to alleviate the issue of data scarcity. However, conventional data augmentation strategies such as spatial and intensity transformation are unable to mimic the deformation and lesions in traumatic brains, which limits the performance of the subsequent segmentation task. To address these issues, we propose a novel medical image inpainting model named TBI-GAN to synthesize TBI MR scans with paired brain label maps. The main strength of our TBI-GAN method is that it can generate TBI images and corresponding label maps simultaneously, which has not been achieved in the previous inpainting methods for medical images. We first generate the inpainted image under the guidance of edge information following a coarse-to-fine manner, and then the synthesized intensity image is used as the prior for label inpainting. Furthermore, we introduce a registration-based template augmentation pipeline to increase the diversity of the synthesized image pairs and enhance the capacity of data augmentation. Experimental results show that the proposed TBI-GAN method can produce sufficient synthesized TBI images with high quality and valid label maps, which can greatly improve the 2D and 3D traumatic brain segmentation performance compared with the alternatives.
['Lichi Zhang', 'Zengxin Qi', 'Qian Wang', 'Zheren Li', 'Xuehai Wu', 'Ruizhe Zheng', 'Zhe Wang', 'Zeyu Wei', 'Kai Xuan', 'Zhenrong Shen', 'Sheng Wang', 'Di Zang', 'Xiangyu Zhao']
2022-08-12
null
null
null
null
['brain-segmentation']
['medical']
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[14.104812622070312, -2.200671911239624]
ef8abe12-5f90-4c5d-88fb-ee32575293aa
automatic-stroke-classification-of-tabla
2104.09064
null
https://arxiv.org/abs/2104.09064v1
https://arxiv.org/pdf/2104.09064v1.pdf
Automatic Stroke Classification of Tabla Accompaniment in Hindustani Vocal Concert Audio
The tabla is a unique percussion instrument due to the combined harmonic and percussive nature of its timbre, and the contrasting harmonic frequency ranges of its two drums. This allows a tabla player to uniquely emphasize parts of the rhythmic cycle (theka) in order to mark the salient positions. An analysis of the loudness dynamics and timing deviations at various cycle positions is an important part of musicological studies on the expressivity in tabla accompaniment. To achieve this at a corpus-level, and not restrict it to the few recordings that manual annotation can afford, it is helpful to have access to an automatic tabla transcription system. Although a few systems have been built by training models on labeled tabla strokes, the achieved accuracy does not necessarily carry over to unseen instruments. In this article, we report our work towards building an instrument-independent stroke classification system for accompaniment tabla based on the more easily available tabla solo audio tracks. We present acoustic features that capture the distinctive characteristics of tabla strokes and build an automatic system to predict the label as one of a reduced, but musicologically motivated, target set of four stroke categories. To address the lack of sufficient labeled training data, we turn to common data augmentation methods and find the use of pitch-shifting based augmentation to be most promising. We then analyse the important features and highlight the problem of their instrument-dependence while motivating the use of more task-specific data augmentation strategies to improve the diversity of training data.
['Preeti Rao', 'Rohit M. A.']
2021-04-19
null
null
null
null
['stroke-classification']
['methodology']
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[15.854453086853027, 5.321338176727295]
8bdc2fe2-b5f6-4cdd-a757-0068726d9bc9
physics-informed-neural-networks-for-1
null
null
http://phmpapers.org/index.php/phmconf/article/view/814
http://phmpapers.org/index.php/phmconf/article/download/814/phmc_19_814
Physics-informed neural networks for corrosion-fatigue prognosis
In this paper, we present a novel physics-informed neural network modeling approach for corrosion-fatigue. The hybrid approach is designed to merge physics- informed and data-driven layers within deep neural networks. The result is a cumulative damage model where the physics-informed layers are used to model the relatively well understood physics (crack growth through Paris law) and the data-driven layers account for the hard to model effects (bias in damage accumulation due to corrosion). A numerical experiment is used to present the main features of the proposed physics-informed recurrent neural network for damage accumulation. The test problem consists of predicting corrosion-fatigue of an Al 2024-T3 alloy used on panels of aircraft wing. Besides cyclic loading, the panels are also subjected to saline corrosion. The physics-informed neural network is trained using full observation of inputs (far-field loads, stress ratio and a corrosivity index – defined per airport) and very limited observation of outputs (crack length at inspection for only a small portion of the fleet). Results show that the physics-informed neural network is able to learn the correction in the original fatigue model due to corrosion and predictions are accurate enough for ranking damage in different airplanes in the fleet (which can be used to prioritizing inspection).
['Arinan Dourado', 'Felipe A. C. Viana']
2019-09-22
null
null
null
annual-conference-of-the-phm-society-2019-9
['physics-informed-machine-learning', 'graph-regression', 'graph-to-sequence']
['graphs', 'graphs', 'natural-language-processing']
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[6.725043773651123, 2.4964754581451416]
3dc55d07-ccc9-418a-af64-f9d95e980a18
total-energy-shaping-with-neural
2112.12999
null
https://arxiv.org/abs/2112.12999v2
https://arxiv.org/pdf/2112.12999v2.pdf
Total Energy Shaping with Neural Interconnection and Damping Assignment -- Passivity Based Control
In this work we exploit the universal approximation property of Neural Networks (NNs) to design interconnection and damping assignment (IDA) passivity-based control (PBC) schemes for fully-actuated mechanical systems in the port-Hamiltonian (pH) framework. To that end, we transform the IDA-PBC method into a supervised learning problem that solves the partial differential matching equations, and fulfills equilibrium assignment and Lyapunov stability conditions. A main consequence of this, is that the output of the learning algorithm has a clear control-theoretic interpretation in terms of passivity and Lyapunov stability. The proposed control design methodology is validated for mechanical systems of one and two degrees-of-freedom via numerical simulations.
['Bayu Jayawardhana', 'Rodolfo Reyes-Baez', 'Santiago Sanchez-Escalonilla']
2021-12-24
null
null
null
null
['total-energy']
['miscellaneous']
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[5.477433204650879, 2.654442071914673]
74f35c44-bb84-4be3-81c2-7ccdcfab0b9a
bundlerecon-ray-bundle-based-3d-neural
2305.07342
null
https://arxiv.org/abs/2305.07342v1
https://arxiv.org/pdf/2305.07342v1.pdf
BundleRecon: Ray Bundle-Based 3D Neural Reconstruction
With the growing popularity of neural rendering, there has been an increasing number of neural implicit multi-view reconstruction methods. While many models have been enhanced in terms of positional encoding, sampling, rendering, and other aspects to improve the reconstruction quality, current methods do not fully leverage the information among neighboring pixels during the reconstruction process. To address this issue, we propose an enhanced model called BundleRecon. In the existing approaches, sampling is performed by a single ray that corresponds to a single pixel. In contrast, our model samples a patch of pixels using a bundle of rays, which incorporates information from neighboring pixels. Furthermore, we design bundle-based constraints to further improve the reconstruction quality. Experimental results demonstrate that BundleRecon is compatible with the existing neural implicit multi-view reconstruction methods and can improve their reconstruction quality.
['Jianke Zhu', 'Weikun Zhang']
2023-05-12
null
null
null
null
['neural-rendering']
['computer-vision']
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[9.249850273132324, -3.227365016937256]
141bb994-eda6-47d4-8da6-cb6e5600176c
realized-recurrent-conditional
2302.08002
null
https://arxiv.org/abs/2302.08002v1
https://arxiv.org/pdf/2302.08002v1.pdf
Realized recurrent conditional heteroskedasticity model for volatility modelling
We propose a new approach to volatility modelling by combining deep learning (LSTM) and realized volatility measures. This LSTM-enhanced realized GARCH framework incorporates and distills modeling advances from financial econometrics, high frequency trading data and deep learning. Bayesian inference via the Sequential Monte Carlo method is employed for statistical inference and forecasting. The new framework can jointly model the returns and realized volatility measures, has an excellent in-sample fit and superior predictive performance compared to several benchmark models, while being able to adapt well to the stylized facts in volatility. The performance of the new framework is tested using a wide range of metrics, from marginal likelihood, volatility forecasting, to tail risk forecasting and option pricing. We report on a comprehensive empirical study using 31 widely traded stock indices over a time period that includes COVID-19 pandemic.
['Robert Kohn', 'Minh-Ngoc Tran', 'Chao Wang', 'Chen Liu']
2023-02-16
null
null
null
null
['econometrics']
['miscellaneous']
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[4.636246204376221, 4.135196208953857]
a7318c4f-6189-4e9e-8320-0b1cd9f0eada
sports-camera-calibration-via-synthetic-data
1810.10658
null
http://arxiv.org/abs/1810.10658v1
http://arxiv.org/pdf/1810.10658v1.pdf
Sports Camera Calibration via Synthetic Data
Calibrating sports cameras is important for autonomous broadcasting and sports analysis. Here we propose a highly automatic method for calibrating sports cameras from a single image using synthetic data. First, we develop a novel camera pose engine. The camera pose engine has only three significant free parameters so that it can effectively generate a lot of camera poses and corresponding edge (i.e, field marking) images. Then, we learn compact deep features via a siamese network from paired edge image and camera pose and build a feature-pose database. After that, we use a novel two-GAN (generative adversarial network) model to detect field markings in real images. Finally, we query an initial camera pose from the feature-pose database and refine camera poses using truncated distance images. We evaluate our method on both synthetic and real data. Our method not only demonstrates the robustness on the synthetic data but also achieves the state-of-the-art accuracy on a standard soccer dataset and very high performance on a volleyball dataset.
['James J. Little', 'Jianhui Chen']
2018-10-25
null
null
null
null
['sports-analytics']
['computer-vision']
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[7.509117603302002, -1.4040178060531616]
3065f3e9-7996-48dd-9fda-22593145b8d6
system-identification-with-copula-entropy
2304.12922
null
https://arxiv.org/abs/2304.12922v1
https://arxiv.org/pdf/2304.12922v1.pdf
System Identification with Copula Entropy
Identifying differential equation governing dynamical system is an important problem with wide applications. Copula Entropy (CE) is a mathematical concept for measuring statistical independence in information theory. In this paper we propose a method for identifying differential equation of dynamical systems with CE. The problem is considered as a variable selection problem and solved with the previously proposed CE-based method for variable selection. The proposed method composed of two components: the difference operator and the CE estimator. Since both components can be done non-parametrically, the proposed method is therefore model-free and hyperparameter-free. The simulation experiment with the 3D Lorenz system verified the effectiveness of the proposed method.
['Jian Ma']
2023-04-23
null
null
null
null
['variable-selection']
['methodology']
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[7.113379955291748, 4.015048027038574]
fd4321d8-f504-4c48-85ef-e8a11d216e07
an-approach-to-intelligent-pneumonia
2012.03487
null
https://arxiv.org/abs/2012.03487v1
https://arxiv.org/pdf/2012.03487v1.pdf
An Approach to Intelligent Pneumonia Detection and Integration
Each year, over 2.5 million people, most of them in developed countries, die from pneumonia [1]. Since many studies have proved pneumonia is successfully treatable when timely and correctly diagnosed, many of diagnosis aids have been developed, with AI-based methods achieving high accuracies [2]. However, currently, the usage of AI in pneumonia detection is limited, in particular, due to challenges in generalizing a locally achieved result. In this report, we propose a roadmap for creating and integrating a system that attempts to solve this challenge. We also address various technical, legal, ethical, and logistical issues, with a blueprint of possible solutions.
['Vamsi S. Pidikiti', 'Sayali R. Rajhans', 'Alena Iureva', 'Bonaventure F. P. Dossou']
2020-12-07
null
null
null
null
['pneumonia-detection']
['medical']
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[15.578423500061035, -1.6638038158416748]
91f4c1b6-fba0-4534-a793-1de8cca06d6e
dichromatic-model-based-temporal-color
null
null
http://openaccess.thecvf.com/content_CVPR_2019/html/Yoo_Dichromatic_Model_Based_Temporal_Color_Constancy_for_AC_Light_Sources_CVPR_2019_paper.html
http://openaccess.thecvf.com/content_CVPR_2019/papers/Yoo_Dichromatic_Model_Based_Temporal_Color_Constancy_for_AC_Light_Sources_CVPR_2019_paper.pdf
Dichromatic Model Based Temporal Color Constancy for AC Light Sources
Existing dichromatic color constancy approach commonly requires a number of spatial pixels which have high specularity. In this paper, we propose a novel approach to estimate the illuminant chromaticity of AC light source using high-speed camera. We found that the temporal observations of an image pixel at a fixed location distribute on an identical dichromatic plane. Instead of spatial pixels with high specularity, multiple temporal samples of a pixel are exploited to determine AC pixels for dichromatic plane estimation, whose pixel intensity is sinusoidally varying well. A dichromatic plane is calculated per each AC pixel, and illuminant chromaticity is determined by the intersection of dichromatic planes. From multiple dichromatic planes, an optimal illuminant is estimated with a novel MAP framework. It is shown that the proposed method outperforms both existing dichromatic based methods and temporal color constancy methods, irrespective of the amount of specularity.
[' Jong-Ok Kim', 'Jun-Sang Yoo']
2019-06-01
null
null
null
cvpr-2019-6
['color-constancy']
['computer-vision']
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[10.367412567138672, -2.667145252227783]
03550177-c6d9-4edc-9f59-8ab0f2d3b31e
use-of-extended-kalman-filtering-in-detecting
null
null
https://www.sciencedirect.com/science/article/abs/pii/S0017931006006533#preview-section-abstract
https://www.sciencedirect.com/science/article/abs/pii/S0017931006006533
Use of extended Kalman filtering in detecting fouling in heat exchangers
This paper is concerned with how non-linear physical state space models can be applied to on-line detection of fouling in heat exchangers. The model parameters are estimated by using an extended Kalman filter and measurements of inlet and outlet temperatures and mass flow rates. In contrast to most conventional methods, fouling can be detected when the heat exchanger operates in transient states. Measurements from a clean counterflow heat exchanger are first used to optimize the Kalman filter. Then fouling is considered.The results show that the proposed method is very sensitive, hence well suited for fouling detection.
['Bernard Desmet', 'Olafur P. Palsson', 'Sylvain Lalot', 'Gudmundur R. Jonsson']
2007-01-17
null
null
null
journal-2007-1
['line-detection']
['computer-vision']
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[6.041321754455566, 2.6544368267059326]
2b45a392-9fbb-4876-814b-b9c771d158e3
simple-and-effective-unsupervised-speech-1
2210.10191
null
https://arxiv.org/abs/2210.10191v1
https://arxiv.org/pdf/2210.10191v1.pdf
Simple and Effective Unsupervised Speech Translation
The amount of labeled data to train models for speech tasks is limited for most languages, however, the data scarcity is exacerbated for speech translation which requires labeled data covering two different languages. To address this issue, we study a simple and effective approach to build speech translation systems without labeled data by leveraging recent advances in unsupervised speech recognition, machine translation and speech synthesis, either in a pipeline approach, or to generate pseudo-labels for training end-to-end speech translation models. Furthermore, we present an unsupervised domain adaptation technique for pre-trained speech models which improves the performance of downstream unsupervised speech recognition, especially for low-resource settings. Experiments show that unsupervised speech-to-text translation outperforms the previous unsupervised state of the art by 3.2 BLEU on the Libri-Trans benchmark, on CoVoST 2, our best systems outperform the best supervised end-to-end models (without pre-training) from only two years ago by an average of 5.0 BLEU over five X-En directions. We also report competitive results on MuST-C and CVSS benchmarks.
['Juan Pino', 'Michael Auli', 'Wei-Ning Hsu', 'Yun Tang', 'Ilia Kulikov', 'Peng-Jen Chen', 'Hirofumi Inaguma', 'Changhan Wang']
2022-10-18
null
null
null
null
['speech-to-text-translation', 'unsupervised-speech-recognition']
['natural-language-processing', 'speech']
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[14.489651679992676, 7.166929721832275]
f33c714f-7a27-44a3-8bcc-945445a581ec
counterfactual-explanations-in-sequential
2107.02776
null
https://arxiv.org/abs/2107.02776v2
https://arxiv.org/pdf/2107.02776v2.pdf
Counterfactual Explanations in Sequential Decision Making Under Uncertainty
Methods to find counterfactual explanations have predominantly focused on one step decision making processes. In this work, we initiate the development of methods to find counterfactual explanations for decision making processes in which multiple, dependent actions are taken sequentially over time. We start by formally characterizing a sequence of actions and states using finite horizon Markov decision processes and the Gumbel-Max structural causal model. Building upon this characterization, we formally state the problem of finding counterfactual explanations for sequential decision making processes. In our problem formulation, the counterfactual explanation specifies an alternative sequence of actions differing in at most k actions from the observed sequence that could have led the observed process realization to a better outcome. Then, we introduce a polynomial time algorithm based on dynamic programming to build a counterfactual policy that is guaranteed to always provide the optimal counterfactual explanation on every possible realization of the counterfactual environment dynamics. We validate our algorithm using both synthetic and real data from cognitive behavioral therapy and show that the counterfactual explanations our algorithm finds can provide valuable insights to enhance sequential decision making under uncertainty.
['Manuel Gomez-Rodriguez', 'Abir De', 'Stratis Tsirtsis']
2021-07-06
null
http://proceedings.neurips.cc/paper/2021/hash/fd0a5a5e367a0955d81278062ef37429-Abstract.html
http://proceedings.neurips.cc/paper/2021/file/fd0a5a5e367a0955d81278062ef37429-Paper.pdf
neurips-2021-12
['decision-making-under-uncertainty', 'counterfactual-explanation', 'decision-making-under-uncertainty']
['medical', 'miscellaneous', 'reasoning']
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[8.109895706176758, 5.55803918838501]
00b93cdb-b8db-4ab9-a5d3-47f79c49aa76
situatedgen-incorporating-geographical-and
2306.12552
null
https://arxiv.org/abs/2306.12552v1
https://arxiv.org/pdf/2306.12552v1.pdf
SituatedGen: Incorporating Geographical and Temporal Contexts into Generative Commonsense Reasoning
Recently, commonsense reasoning in text generation has attracted much attention. Generative commonsense reasoning is the task that requires machines, given a group of keywords, to compose a single coherent sentence with commonsense plausibility. While existing datasets targeting generative commonsense reasoning focus on everyday scenarios, it is unclear how well machines reason under specific geographical and temporal contexts. We formalize this challenging task as SituatedGen, where machines with commonsense should generate a pair of contrastive sentences given a group of keywords including geographical or temporal entities. We introduce a corresponding English dataset consisting of 8,268 contrastive sentence pairs, which are built upon several existing commonsense reasoning benchmarks with minimal manual labor. Experiments show that state-of-the-art generative language models struggle to generate sentences with commonsense plausibility and still lag far behind human performance. Our dataset is publicly available at https://github.com/yunx-z/situated_gen.
['Xiaojun Wan', 'Yunxiang Zhang']
2023-06-21
null
null
null
null
['text-generation']
['natural-language-processing']
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[11.199752807617188, 8.743819236755371]
444ff8af-fdb4-4356-97cb-701e30ed78b2
generative-one-class-models-for-text-based
1611.05915
null
http://arxiv.org/abs/1611.05915v1
http://arxiv.org/pdf/1611.05915v1.pdf
Generative One-Class Models for Text-based Person Retrieval in Forensic Applications
Automatic forensic image analysis assists criminal investigation experts in the search for suspicious persons, abnormal behaviors detection and identity matching in images. In this paper we propose a person retrieval system that uses textual queries (e.g., "black trousers and green shirt") as descriptions and a one-class generative color model with outlier filtering to represent the images both to train the models and to perform the search. The method is evaluated in terms of its efficiency in fulfilling the needs of a forensic retrieval system: limited annotation, robustness, extensibility, adaptability and computational cost. The proposed generative method is compared to a corresponding discriminative approach. Experiments are carried out using a range of queries in three different databases. The experiments show that the two evaluated algorithms provide average retrieval performance and adaptable to new datasets. The proposed generative algorithm has some advantages over the discriminative one, specifically its capability to work with very few training samples and its much lower computational requirements when the number of training examples increases.
['Hedvig Kjellström', 'David Gerónimo']
2016-11-17
null
null
null
null
['person-retrieval', 'nlp-based-person-retrival']
['computer-vision', 'computer-vision']
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[12.395585060119629, 0.9116864204406738]
fcc4c7ae-a11a-42cf-a9ef-103bc74a9d5a
mac-a-novel-stochastic-optimization-method
2304.12248
null
https://arxiv.org/abs/2304.12248v1
https://arxiv.org/pdf/2304.12248v1.pdf
MAC, a novel stochastic optimization method
A novel stochastic optimization method called MAC was suggested. The method is based on the calculation of the objective function at several random points and then an empirical expected value and an empirical covariance matrix are calculated. The empirical expected value is proven to converge to the optimum value of the problem. The MAC algorithm was encoded in Matlab and the code was tested on 20 test problems. Its performance was compared with those of the interior point method (Matlab name: fmincon), simplex, pattern search (PS), simulated annealing (SA), particle swarm optimization (PSO), and genetic algorithm (GA) methods. The MAC method failed two test functions and provided inaccurate results on four other test functions. However, it provided accurate results and required much less CPU time than the widely used optimization methods on the other 14 test functions.
['János Tóth', 'Tamás Turányi', 'Goitom Simret Kidane', 'Attila László Nagy']
2023-04-14
null
null
null
null
['stochastic-optimization']
['methodology']
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[5.708166599273682, 3.4743728637695312]
31148a15-3b4f-45d9-b8cd-56adf48d5b9f
learning-disentangled-label-representations
2212.01461
null
https://arxiv.org/abs/2212.01461v1
https://arxiv.org/pdf/2212.01461v1.pdf
Learning Disentangled Label Representations for Multi-label Classification
Although various methods have been proposed for multi-label classification, most approaches still follow the feature learning mechanism of the single-label (multi-class) classification, namely, learning a shared image feature to classify multiple labels. However, we find this One-shared-Feature-for-Multiple-Labels (OFML) mechanism is not conducive to learning discriminative label features and makes the model non-robustness. For the first time, we mathematically prove that the inferiority of the OFML mechanism is that the optimal learned image feature cannot maintain high similarities with multiple classifiers simultaneously in the context of minimizing cross-entropy loss. To address the limitations of the OFML mechanism, we introduce the One-specific-Feature-for-One-Label (OFOL) mechanism and propose a novel disentangled label feature learning (DLFL) framework to learn a disentangled representation for each label. The specificity of the framework lies in a feature disentangle module, which contains learnable semantic queries and a Semantic Spatial Cross-Attention (SSCA) module. Specifically, learnable semantic queries maintain semantic consistency between different images of the same label. The SSCA module localizes the label-related spatial regions and aggregates located region features into the corresponding label feature to achieve feature disentanglement. We achieve state-of-the-art performance on eight datasets of three tasks, \ie, multi-label classification, pedestrian attribute recognition, and continual multi-label learning.
['Kaiqi Huang', 'Xiaotang Chen', 'Naiyu Gao', 'Fei He', 'Jian Jia']
2022-12-02
null
null
null
null
['pedestrian-attribute-recognition', 'multi-label-learning']
['computer-vision', 'methodology']
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[9.440239906311035, 4.061663627624512]
f0a2477a-d836-44d8-a1c5-ce1d017b7d6a
shell-theory-a-statistical-model-of-reality
null
null
https://ieeexplore.ieee.org/document/9444188
http://www.kind-of-works.com/papers/shell_theory_preprint.pdf
Shell Theory: A Statistical Model of Reality
The foundational assumption of machine learning is that the data under consideration is separable into classes; while intuitively reasonable, separability constraints have proven remarkably difficult to formulate mathematically. We believe this problem is rooted in the mismatch between existing statistical techniques and commonly encountered data; object representations are typically high dimensional but statistical techniques tend to treat high dimensions a degenerate case. To address this problem, we develop a dedicated statistical framework for machine learning in high dimensions. The framework derives from the observation that object relations form a natural hierarchy; this leads us to model objects as instances of a high dimensional, hierarchal generative processes. Using a distance based statistical technique, also developed in this paper, we show that in such generative processes, instances of each process in the hierarchy, are almost-always encapsulated by a distinctive-shell that excludes almost-all other instances. The result is shell theory, a statistical machine learning framework in which separability constraints (distinctive-shells) are formally derived from the assumed generative process.
['Yasuyuki Matsushita', 'Hongdong Li', 'Ngai-Man Cheung', 'Changhao Ren', 'Siying Liu', 'Wen-Yan Lin']
2021-05-28
null
null
null
ieee-transactions-on-pattern-analysis-and-15
['unsupervised-anomaly-detection-with-specified-5', 'unsupervised-anomaly-detection-with-specified-4', 'unsupervised-anomaly-detection-with-specified-7', 'unsupervised-anomaly-detection-with-specified-6', 'unsupervised-anomaly-detection-with-specified', 'one-class-classifier']
['computer-vision', 'computer-vision', 'computer-vision', 'computer-vision', 'computer-vision', 'methodology']
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[7.314537048339844, 4.594597816467285]
e6da29a0-02dc-45fa-82c8-d0734ec68372
combined-machine-learning-and-physics-based
2303.09073
null
https://arxiv.org/abs/2303.09073v1
https://arxiv.org/pdf/2303.09073v1.pdf
Combined Machine Learning and Physics-Based Forecaster for Intra-day and 1-Week Ahead Solar Irradiance Forecasting Under Variable Weather Conditions
Power systems engineers are actively developing larger power plants out of photovoltaics imposing some major challenges which include its intermittent power generation and its poor dispatchability. The issue is that PV is a variable generation source unless additional planning and system additions for mitigation of generation intermittencies. One underlying factor that can enhance the applications around mitigating distributed energy resource intermittency challenges is forecasting the generation output. This is challenging especially with renewable energy sources which are weather dependent as due to the random nature of weather variance. This work puts forth a forecasting model which uses the solar variables to produce a PV generation forecast and evaluates a set of machine learning models for this task. In this paper, a forecaster for irradiance prediction for intra-day is proposed. This forecaster is capable of forecasting 15 minutes and hourly irradiance up to one week ahead. The paper performed a correlation and sensitivity analysis of the strength of the relationship between local weather parameters and system generation. In this study performance of SVM, CART, ANN, and Ensemble learning were analyzed for the prediction of 15-minute intraday and day-ahead irradiance. The results show that SVM and Ensemble learning yielded the lowest MAE for 15-minute intraday and day-ahead irradiance, respectively.
['Arif Sarwat', 'Mohd Tariq', 'Shahid Tufail', 'Hugo Riggs']
2023-03-16
null
null
null
null
['solar-irradiance-forecasting']
['time-series']
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[6.218637943267822, 2.8170254230499268]
7cf0b05d-ce41-4095-a95e-cc3c6fc73adf
matching-cnn-meets-knn-quasi-parametric-human
1504.01220
null
http://arxiv.org/abs/1504.01220v1
http://arxiv.org/pdf/1504.01220v1.pdf
Matching-CNN Meets KNN: Quasi-Parametric Human Parsing
Both parametric and non-parametric approaches have demonstrated encouraging performances in the human parsing task, namely segmenting a human image into several semantic regions (e.g., hat, bag, left arm, face). In this work, we aim to develop a new solution with the advantages of both methodologies, namely supervision from annotated data and the flexibility to use newly annotated (possibly uncommon) images, and present a quasi-parametric human parsing model. Under the classic K Nearest Neighbor (KNN)-based nonparametric framework, the parametric Matching Convolutional Neural Network (M-CNN) is proposed to predict the matching confidence and displacements of the best matched region in the testing image for a particular semantic region in one KNN image. Given a testing image, we first retrieve its KNN images from the annotated/manually-parsed human image corpus. Then each semantic region in each KNN image is matched with confidence to the testing image using M-CNN, and the matched regions from all KNN images are further fused, followed by a superpixel smoothing procedure to obtain the ultimate human parsing result. The M-CNN differs from the classic CNN in that the tailored cross image matching filters are introduced to characterize the matching between the testing image and the semantic region of a KNN image. The cross image matching filters are defined at different convolutional layers, each aiming to capture a particular range of displacements. Comprehensive evaluations over a large dataset with 7,700 annotated human images well demonstrate the significant performance gain from the quasi-parametric model over the state-of-the-arts, for the human parsing task.
['Xiaochun Cao', 'Liang Lin', 'Xiaohui Shen', 'Luoqi Liu', 'Xiaodan Liang', 'Jianchao Yang', 'Si Liu', 'Changsheng Xu', 'Shuicheng Yan']
2015-04-06
matching-cnn-meets-knn-quasi-parametric-human-1
http://openaccess.thecvf.com/content_cvpr_2015/html/Liu_Matching-CNN_Meets_KNN_2015_CVPR_paper.html
http://openaccess.thecvf.com/content_cvpr_2015/papers/Liu_Matching-CNN_Meets_KNN_2015_CVPR_paper.pdf
cvpr-2015-6
['human-parsing']
['computer-vision']
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[8.671414375305176, 0.018070267513394356]
5388d5c6-1f40-415d-871f-9149bb9943a0
difer-differentiable-automated-feature
2010.08784
null
https://arxiv.org/abs/2010.08784v3
https://arxiv.org/pdf/2010.08784v3.pdf
DIFER: Differentiable Automated Feature Engineering
Feature engineering, a crucial step of machine learning, aims to extract useful features from raw data to improve data quality. In recent years, great efforts have been devoted to Automated Feature Engineering (AutoFE) to replace expensive human labor. However, existing methods are computationally demanding due to treating AutoFE as a coarse-grained black-box optimization problem over a discrete space. In this work, we propose an efficient gradient-based method called DIFER to perform differentiable automated feature engineering in a continuous vector space. DIFER selects potential features based on evolutionary algorithm and leverages an encoder-predictor-decoder controller to optimize existing features. We map features into the continuous vector space via the encoder, optimize the embedding along the gradient direction induced by the predicted score, and recover better features from the optimized embedding by the decoder. Extensive experiments on classification and regression datasets demonstrate that DIFER can significantly improve the performance of various machine learning algorithms and outperform current state-of-the-art AutoFE methods in terms of both efficiency and performance.
['Yihua Huang', 'Chunfeng Yuan', 'Xu Guo', 'Zhuoer Xu', 'Guanghui Zhu']
2020-10-17
null
null
null
null
['automated-feature-engineering']
['methodology']
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[9.364721298217773, 3.2788546085357666]
645414a5-0c0b-44b6-918f-5773815300e8
on-bottleneck-features-for-text-dependent
2005.07383
null
https://arxiv.org/abs/2005.07383v2
https://arxiv.org/pdf/2005.07383v2.pdf
On Bottleneck Features for Text-Dependent Speaker Verification Using X-vectors
Applying x-vectors for speaker verification has recently attracted great interest, with the focus being on text-independent speaker verification. In this paper, we study x-vectors for text-dependent speaker verification (TD-SV), which remains unexplored. We further investigate the impact of the different bottleneck (BN) features on the performance of x-vectors, including the recently-introduced time-contrastive-learning (TCL) BN features and phone-discriminant BN features. TCL is a weakly supervised learning approach that constructs training data by uniformly partitioning each utterance into a predefined number of segments and then assigning each segment a class label depending on their position in the utterance. We also compare TD-SV performance for different modeling techniques, including the Gaussian mixture models-universal background model (GMM-UBM), i-vector, and x-vector. Experiments are conducted on the RedDots 2016 challenge database. It is found that the type of features has a marginal impact on the performance of x-vectors with the TCL BN feature achieving the lowest equal error rate, while the impact of features is significant for i-vector and GMM-UBM. The fusion of x-vector and i-vector systems gives a large gain in performance. The GMM-UBM technique shows its advantage for TD-SV using short utterances.
['Zheng-Hua Tan', 'Achintya Kumar Sarkar']
2020-05-15
null
null
null
null
['text-independent-speaker-verification', 'text-dependent-speaker-verification']
['speech', 'speech']
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[14.352425575256348, 6.109110355377197]
fa449b54-9ec0-43f2-a126-7d9e9e2e653b
toward-a-deep-neural-approach-for-knowledge
1606.07211
null
http://arxiv.org/abs/1606.07211v1
http://arxiv.org/pdf/1606.07211v1.pdf
Toward a Deep Neural Approach for Knowledge-Based IR
This paper tackles the problem of the semantic gap between a document and a query within an ad-hoc information retrieval task. In this context, knowledge bases (KBs) have already been acknowledged as valuable means since they allow the representation of explicit relations between entities. However, they do not necessarily represent implicit relations that could be hidden in a corpora. This latter issue is tackled by recent works dealing with deep representation learn ing of texts. With this in mind, we argue that embedding KBs within deep neural architectures supporting documentquery matching would give rise to fine-grained latent representations of both words and their semantic relations. In this paper, we review the main approaches of neural-based document ranking as well as those approaches for latent representation of entities and relations via KBs. We then propose some avenues to incorporate KBs in deep neural approaches for document ranking. More particularly, this paper advocates that KBs can be used either to support enhanced latent representations of queries and documents based on both distributional and relational semantics or to serve as a semantic translator between their latent distributional representations.
['Nathalie Bricon-Souf', 'Gia-Hung Nguyen', 'Laure Soulier', 'Lynda Tamine']
2016-06-23
null
null
null
null
['ad-hoc-information-retrieval', 'implicit-relations']
['natural-language-processing', 'natural-language-processing']
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