Search Results for author: Zhenghua Chen

Found 38 papers, 19 papers with code

TSLANet: Rethinking Transformers for Time Series Representation Learning

1 code implementation12 Apr 2024 Emadeldeen Eldele, Mohamed Ragab, Zhenghua Chen, Min Wu, XiaoLi Li

Time series data, characterized by its intrinsic long and short-range dependencies, poses a unique challenge across analytical applications.

Anomaly Detection Computational Efficiency +4

Improve Knowledge Distillation via Label Revision and Data Selection

no code implementations3 Apr 2024 Weichao Lan, Yiu-ming Cheung, Qing Xu, Buhua Liu, Zhikai Hu, Mengke Li, Zhenghua Chen

In addition to the supervision of ground truth, the vanilla KD method regards the predictions of the teacher as soft labels to supervise the training of the student model.

Knowledge Distillation Model Compression

K-Link: Knowledge-Link Graph from LLMs for Enhanced Representation Learning in Multivariate Time-Series Data

no code implementations6 Mar 2024 Yucheng Wang, Ruibing Jin, Min Wu, XiaoLi Li, Lihua Xie, Zhenghua Chen

To capture these dependencies, Graph Neural Networks (GNNs) have emerged as powerful tools, yet their effectiveness is restricted by the quality of graph construction from MTS data.

General Knowledge graph construction +2

PowerSkel: A Device-Free Framework Using CSI Signal for Human Skeleton Estimation in Power Station

1 code implementation4 Mar 2024 Cunyi Yin, Xiren Miao, Jing Chen, Hao Jiang, Jianfei Yang, Yunjiao Zhou, Min Wu, Zhenghua Chen

WiFi-based human pose estimation is a suitable method for monitoring power operations due to its low cost, device-free, and robustness to various illumination conditions. In this paper, a novel Channel State Information (CSI)-based pose estimation framework, namely PowerSkel, is developed to address these challenges.

Knowledge Distillation Pose Estimation

Graph Convolutional Network with Connectivity Uncertainty for EEG-based Emotion Recognition

no code implementations22 Oct 2023 Hongxiang Gao, Xiangyao Wang, Zhenghua Chen, Min Wu, Zhipeng Cai, Lulu Zhao, Jianqing Li, Chengyu Liu

To address these challenges, this study introduces the distribution-based uncertainty method to represent spatial dependencies and temporal-spectral relativeness in EEG signals based on Graph Convolutional Network (GCN) architecture that adaptively assigns weights to functional aggregate node features, enabling effective long-path capturing while mitigating over-smoothing phenomena.

EEG Emotion Recognition

Graph-Aware Contrasting for Multivariate Time-Series Classification

1 code implementation11 Sep 2023 Yucheng Wang, Yuecong Xu, Jianfei Yang, Min Wu, XiaoLi Li, Lihua Xie, Zhenghua Chen

As MTS data typically originate from multiple sensors, ensuring spatial consistency becomes essential for the overall performance of contrastive learning on MTS data.

Classification Contrastive Learning +3

Fully-Connected Spatial-Temporal Graph for Multivariate Time-Series Data

1 code implementation11 Sep 2023 Yucheng Wang, Yuecong Xu, Jianfei Yang, Min Wu, XiaoLi Li, Lihua Xie, Zhenghua Chen

For graph construction, we design a decay graph to connect sensors across all timestamps based on their temporal distances, enabling us to fully model the ST dependencies by considering the correlations between DEDT.

graph construction Time Series

Source-Free Domain Adaptation with Temporal Imputation for Time Series Data

1 code implementation14 Jul 2023 Mohamed Ragab, Emadeldeen Eldele, Min Wu, Chuan-Sheng Foo, XiaoLi Li, Zhenghua Chen

The existing SFDA methods that are mainly designed for visual applications may fail to handle the temporal dynamics in time series, leading to impaired adaptation performance.

Imputation Source-Free Domain Adaptation +1

Distilling Universal and Joint Knowledge for Cross-Domain Model Compression on Time Series Data

1 code implementation7 Jul 2023 Qing Xu, Min Wu, XiaoLi Li, Kezhi Mao, Zhenghua Chen

More specifically, a feature-domain discriminator is employed to align teacher's and student's representations for universal knowledge transfer.

Knowledge Distillation Model Compression +2

ECG-CL: A Comprehensive Electrocardiogram Interpretation Method Based on Continual Learning

no code implementations10 Apr 2023 Hongxiang Gao, Xingyao Wang, Zhenghua Chen, Min Wu, Jianqing Li, Chengyu Liu

From the perspective of intelligent wearable applications, the possibility of a comprehensive ECG interpretation algorithm based on single-lead ECGs is also confirmed.

Continual Learning Incremental Learning +1

Augmenting and Aligning Snippets for Few-Shot Video Domain Adaptation

no code implementations ICCV 2023 Yuecong Xu, Jianfei Yang, Yunjiao Zhou, Zhenghua Chen, Min Wu, XiaoLi Li

We thus consider a more realistic \textit{Few-Shot Video-based Domain Adaptation} (FSVDA) scenario where we adapt video models with only a few target video samples.

Action Recognition Unsupervised Domain Adaptation

Label-efficient Time Series Representation Learning: A Review

no code implementations13 Feb 2023 Emadeldeen Eldele, Mohamed Ragab, Zhenghua Chen, Min Wu, Chee-Keong Kwoh, XiaoLi Li

The scarcity of labeled data is one of the main challenges of applying deep learning models on time series data in the real world.

Representation Learning Self-Supervised Learning +3

Contrastive Domain Adaptation for Time-Series via Temporal Mixup

1 code implementation3 Dec 2022 Emadeldeen Eldele, Mohamed Ragab, Zhenghua Chen, Min Wu, Chee-Keong Kwoh, XiaoLi Li

Specifically, we propose a novel temporal mixup strategy to generate two intermediate augmented views for the source and target domains.

Contrastive Learning Time Series +2

Video Unsupervised Domain Adaptation with Deep Learning: A Comprehensive Survey

no code implementations17 Nov 2022 Yuecong Xu, Haozhi Cao, Zhenghua Chen, XiaoLi Li, Lihua Xie, Jianfei Yang

To tackle performance degradation and address concerns in high video annotation cost uniformly, the video unsupervised domain adaptation (VUDA) is introduced to adapt video models from the labeled source domain to the unlabeled target domain by alleviating video domain shift, improving the generalizability and portability of video models.

Action Recognition Unsupervised Domain Adaptation

Self-supervised Contrastive Representation Learning for Semi-supervised Time-Series Classification

2 code implementations13 Aug 2022 Emadeldeen Eldele, Mohamed Ragab, Zhenghua Chen, Min Wu, Chee-Keong Kwoh, XiaoLi Li, Cuntai Guan

Specifically, we propose time-series specific weak and strong augmentations and use their views to learn robust temporal relations in the proposed temporal contrasting module, besides learning discriminative representations by our proposed contextual contrasting module.

Contrastive Learning Data Augmentation +5

Leveraging Endo- and Exo-Temporal Regularization for Black-box Video Domain Adaptation

no code implementations10 Aug 2022 Yuecong Xu, Jianfei Yang, Haozhi Cao, Min Wu, XiaoLi Li, Lihua Xie, Zhenghua Chen

To enable video models to be applied seamlessly across video tasks in different environments, various Video Unsupervised Domain Adaptation (VUDA) methods have been proposed to improve the robustness and transferability of video models.

Action Recognition Unsupervised Domain Adaptation

A Survey on AI Sustainability: Emerging Trends on Learning Algorithms and Research Challenges

no code implementations8 May 2022 Zhenghua Chen, Min Wu, Alvin Chan, XiaoLi Li, Yew-Soon Ong

We believe that this technical review can help to promote a sustainable development of AI R&D activities for the research community.

Fairness

ADATIME: A Benchmarking Suite for Domain Adaptation on Time Series Data

1 code implementation15 Mar 2022 Mohamed Ragab, Emadeldeen Eldele, Wee Ling Tan, Chuan-Sheng Foo, Zhenghua Chen, Min Wu, Chee-Keong Kwoh, XiaoLi Li

Our evaluation includes adapting state-of-the-art visual domain adaptation methods to time series data as well as the recent methods specifically developed for time series data.

Benchmarking Time Series +2

Source-free Video Domain Adaptation by Learning Temporal Consistency for Action Recognition

1 code implementation9 Mar 2022 Yuecong Xu, Jianfei Yang, Haozhi Cao, Keyu Wu, Wu Min, Zhenghua Chen

Video-based Unsupervised Domain Adaptation (VUDA) methods improve the robustness of video models, enabling them to be applied to action recognition tasks across different environments.

Action Recognition Source-Free Domain Adaptation +1

Going Deeper into Recognizing Actions in Dark Environments: A Comprehensive Benchmark Study

no code implementations19 Feb 2022 Yuecong Xu, Jianfei Yang, Haozhi Cao, Jianxiong Yin, Zhenghua Chen, XiaoLi Li, Zhengguo Li, Qianwen Xu

While action recognition (AR) has gained large improvements with the introduction of large-scale video datasets and the development of deep neural networks, AR models robust to challenging environments in real-world scenarios are still under-explored.

Action Recognition Autonomous Driving

Self-supervised Autoregressive Domain Adaptation for Time Series Data

1 code implementation29 Nov 2021 Mohamed Ragab, Emadeldeen Eldele, Zhenghua Chen, Min Wu, Chee-Keong Kwoh, XiaoLi Li

Second, we propose a novel autoregressive domain adaptation technique that incorporates temporal dependency of both source and target features during domain alignment.

Self-Supervised Learning Time Series +2

Learning to Iteratively Solve Routing Problems with Dual-Aspect Collaborative Transformer

2 code implementations NeurIPS 2021 Yining Ma, Jingwen Li, Zhiguang Cao, Wen Song, Le Zhang, Zhenghua Chen, Jing Tang

Moreover, the positional features are embedded through a novel cyclic positional encoding (CPE) method to allow Transformer to effectively capture the circularity and symmetry of VRP solutions (i. e., cyclic sequences).

Traveling Salesman Problem

A Systematic Evaluation of Domain Adaptation Algorithms On Time Series Data

no code implementations29 Sep 2021 Mohamed Ragab, Emadeldeen Eldele, Wee Ling Tan, Chuan-Sheng Foo, Zhenghua Chen, Min Wu, Chee Kwoh, XiaoLi Li

Our evaluation includes adaptations of state-of-the-art visual domain adaptation methods to time series data in addition to recent methods specifically developed for time series data.

Benchmarking Model Selection +3

Multi-Source Video Domain Adaptation with Temporal Attentive Moment Alignment

no code implementations21 Sep 2021 Yuecong Xu, Jianfei Yang, Haozhi Cao, Keyu Wu, Min Wu, Rui Zhao, Zhenghua Chen

Multi-Source Domain Adaptation (MSDA) is a more practical domain adaptation scenario in real-world scenarios.

Unsupervised Domain Adaptation

Attention-Guided NIR Image Colorization via Adaptive Fusion of Semantic and Texture Clues

no code implementations20 Jul 2021 Xingxing Yang, Jie Chen, Zaifeng Yang, Zhenghua Chen

Finally, a Fusion Attention Block (FAB) is proposed to adaptively fuse the features from the two branches and generate an optimized colorization result.

Colorization Generative Adversarial Network +1

Partial Video Domain Adaptation with Partial Adversarial Temporal Attentive Network

no code implementations ICCV 2021 Yuecong Xu, Jianfei Yang, Haozhi Cao, Qi Li, Kezhi Mao, Zhenghua Chen

For videos, such negative transfer could be triggered by both spatial and temporal features, which leads to a more challenging Partial Video Domain Adaptation (PVDA) problem.

Partial Domain Adaptation

ADAST: Attentive Cross-domain EEG-based Sleep Staging Framework with Iterative Self-Training

1 code implementation9 Jul 2021 Emadeldeen Eldele, Mohamed Ragab, Zhenghua Chen, Min Wu, Chee-Keong Kwoh, XiaoLi Li, Cuntai Guan

Second, we design an iterative self-training strategy to improve the classification performance on the target domain via target domain pseudo labels.

Automatic Sleep Stage Classification Domain Adaptation +2

Time-Series Representation Learning via Temporal and Contextual Contrasting

1 code implementation26 Jun 2021 Emadeldeen Eldele, Mohamed Ragab, Zhenghua Chen, Min Wu, Chee Keong Kwoh, XiaoLi Li, Cuntai Guan

In this paper, we propose an unsupervised Time-Series representation learning framework via Temporal and Contextual Contrasting (TS-TCC), to learn time-series representation from unlabeled data.

Automatic Sleep Stage Classification Contrastive Learning +9

An Attention-Based Deep Learning Approach for Sleep Stage Classification With Single-Channel EEG

1 code implementation28 Apr 2021 Emadeldeen Eldele, Zhenghua Chen, Chengyu Liu, Min Wu, Chee-Keong Kwoh, XiaoLi Li, Cuntai Guan

The MRCNN can extract low and high frequency features and the AFR is able to improve the quality of the extracted features by modeling the inter-dependencies between the features.

Automatic Sleep Stage Classification EEG +1

Deep Inertial Odometry with Accurate IMU Preintegration

no code implementations18 Jan 2021 Rooholla Khorrambakht, Chris Xiaoxuan Lu, Hamed Damirchi, Zhenghua Chen, Zhengguo Li

Inertial Measurement Units (IMUs) are interceptive modalities that provide ego-motion measurements independent of the environmental factors.

Attention Sequence to Sequence Model for Machine Remaining Useful Life Prediction

no code implementations20 Jul 2020 Mohamed Ragab, Zhenghua Chen, Min Wu, Chee-Keong Kwoh, Ruqiang Yan, Xiao-Li Li

Accurate estimation of remaining useful life (RUL) of industrial equipment can enable advanced maintenance schedules, increase equipment availability and reduce operational costs.

Hybrid coarse-fine classification for head pose estimation

1 code implementation21 Jan 2019 Haofan Wang, Zhenghua Chen, Yi Zhou

In this paper, to do the estimation without facial landmarks, we combine the coarse and fine regression output together for a deep network.

3D Reconstruction Classification +6

Deep Learning and Its Applications to Machine Health Monitoring: A Survey

1 code implementation16 Dec 2016 Rui Zhao, Ruqiang Yan, Zhenghua Chen, Kezhi Mao, Peng Wang, Robert X. Gao

Since 2006, deep learning (DL) has become a rapidly growing research direction, redefining state-of-the-art performances in a wide range of areas such as object recognition, image segmentation, speech recognition and machine translation.

Image Segmentation Machine Translation +5

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