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Self-supervised contrastive learning (CL) has achieved state-of-the-art performance in representation learning by minimizing the distance between positive pairs while maximizing that of negative ones. Recently, it has been verified that the…

Computer Vision and Pattern Recognition · Computer Science 2024-07-16 Jin-Young Kim , Soonwoo Kwon , Hyojun Go , Yunsung Lee , Seungtaek Choi , Hyun-Gyoon Kim

Relating speech to EEG holds considerable importance but is challenging. In this study, a deep convolutional network was employed to extract spatiotemporal features from EEG data. Self-supervised speech representation and contextual text…

Signal Processing · Electrical Eng. & Systems 2024-02-02 Bo Wang , Xiran Xu , Zechen Zhang , Haolin Zhu , YuJie Yan , Xihong Wu , Jing Chen

Intuitive human-machine interfaces may be developed using pattern classification to estimate executed human motions from electromyogram (EMG) signals generated during muscle contraction. The continual use of EMG-based interfaces gradually…

Signal Processing · Electrical Eng. & Systems 2023-10-03 Seitaro Yoneda , Akira Furui

Obtaining per-beat information is a key task in the analysis of cardiac electrocardiograms (ECG), as many downstream diagnosis tasks are dependent on ECG-based measurements. Those measurements, however, are costly to produce, especially in…

Machine Learning · Computer Science 2022-06-14 Guillermo Jimenez-Perez , Juan Acosta , Alejandro Alcaine , Oscar Camara

This paper strives for self-supervised learning of a feature space suitable for skeleton-based action recognition. Our proposal is built upon learning invariances to input skeleton representations and various skeleton augmentations via a…

Computer Vision and Pattern Recognition · Computer Science 2021-08-10 Fida Mohammad Thoker , Hazel Doughty , Cees G. M. Snoek

The electrocardiogram (ECG) is a fundamental tool in cardiovascular diagnostics due to its powerful and non-invasive nature. One of the most critical usages is to determine whether more detailed examinations are necessary, with users…

Artificial Intelligence · Computer Science 2025-04-15 Junichiro Takahashi , JingChuan Guan , Masataka Sato , Kaito Baba , Kazuto Haruguchi , Daichi Nagashima , Satoshi Kodera , Norihiko Takeda

Electrocardiography (ECG) is central to cardiovascular care, but conventional AI models are often restricted to common arrhythmias and may generalize poorly across populations or clinically subtle diseases. We developed ECG Contrastive…

Unsupervised learning methods have become increasingly important in deep learning due to their demonstrated large utilization of datasets and higher accuracy in computer vision and natural language processing tasks. There is a growing trend…

Computer Vision and Pattern Recognition · Computer Science 2023-10-18 Guoxin Wang , Qingyuan Wang , Ganesh Neelakanta Iyer , Avishek Nag , Deepu John

In computer vision, contrastive learning is the most advanced unsupervised learning framework. Yet most previous methods simply apply fixed composition of data augmentations to improve data efficiency, which ignores the changes in their…

Computer Vision and Pattern Recognition · Computer Science 2023-04-20 Yuhan Zhang , He Zhu , Shan Yu

Graph Convolutional Networks (GCNs) has demonstrated promising results for recommender systems, as they can effectively leverage high-order relationship. However, these methods usually encounter data sparsity issue in real-world scenarios.…

Information Retrieval · Computer Science 2023-09-21 Qian Zhao , Zhengwei Wu , Zhiqiang Zhang , Jun Zhou

The progress of EEG-based emotion recognition has received widespread attention from the fields of human-machine interactions and cognitive science in recent years. However, how to recognize emotions with limited labels has become a new…

Signal Processing · Electrical Eng. & Systems 2022-08-03 Haoning Kan , Jiale Yu , Jiajin Huang , Zihe Liu , Haiyan Zhou

Self-supervised learning has become a popular approach in recent years for its ability to learn meaningful representations without the need for data annotation. This paper proposes a novel image augmentation technique, overlaying images,…

Computer Vision and Pattern Recognition · Computer Science 2023-01-25 Yinheng Li , Han Ding , Shaofei Wang

We present a multimodal framework to learn general audio representations from videos. Existing contrastive audio representation learning methods mainly focus on using the audio modality alone during training. In this work, we show that…

Sound · Computer Science 2021-04-29 Luyu Wang , Pauline Luc , Adria Recasens , Jean-Baptiste Alayrac , Aaron van den Oord

Graph classification is a widely studied problem and has broad applications. In many real-world problems, the number of labeled graphs available for training classification models is limited, which renders these models prone to overfitting.…

Machine Learning · Computer Science 2020-09-15 Jiaqi Zeng , Pengtao Xie

Inspired by the idea of Positive-incentive Noise (Pi-Noise or $\pi$-Noise) that aims at learning the reliable noise beneficial to tasks, we scientifically investigate the connection between contrastive learning and $\pi$-noise in this…

Machine Learning · Computer Science 2026-05-11 Hongyuan Zhang , Yanchen Xu , Sida Huang , Xuelong Li

Contrastive learning has led to substantial improvements in the quality of learned embedding representations for tasks such as image classification. However, a key drawback of existing contrastive augmentation methods is that they may lead…

Computer Vision and Pattern Recognition · Computer Science 2022-04-19 Zhibo Zhang , Jongseong Jang , Chiheb Trabelsi , Ruiwen Li , Scott Sanner , Yeonjeong Jeong , Dongsub Shim

Representation learning has significantly been developed with the advance of contrastive learning methods. Most of those methods have benefited from various data augmentations that are carefully designated to maintain their identities so…

Computer Vision and Pattern Recognition · Computer Science 2022-01-24 Xiao Wang , Guo-Jun Qi

Contrastive learning-based recommendation algorithms have significantly advanced the field of self-supervised recommendation, particularly with BPR as a representative ranking prediction task that dominates implicit collaborative filtering.…

Information Retrieval · Computer Science 2024-03-13 Shipeng Song , Bin Liu , Fei Teng , Tianrui Li

Recommender systems are widely deployed in various web environments, and self-supervised learning (SSL) has recently attracted significant attention in this field. Contrastive learning (CL) stands out as a major SSL paradigm due to its…

Information Retrieval · Computer Science 2025-01-17 Yu Zhang , Lei Sang , Yi Zhang , Yiwen Zhang , Yun Yang

An electrocardiogram (ECG) is a time-series signal that is represented by one-dimensional (1-D) data. Higher dimensional representation contains more information that is accessible for feature extraction. Hidden variables such as frequency…

Machine Learning · Statistics 2019-04-12 K. S. Rajput , S. Wibowo , C. Hao , M. Majmudar