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In recent years, self-supervised representation learning for skeleton-based action recognition has been developed with the advance of contrastive learning methods. The existing contrastive learning methods use normal augmentations to…

Computer Vision and Pattern Recognition · Computer Science 2021-12-08 Tianyu Guo , Hong Liu , Zhan Chen , Mengyuan Liu , Tao Wang , Runwei Ding

Graph contrastive learning (GCL) aims to learn discriminative semantic invariance by contrasting different views of the same graph that share critical topological patterns. However, existing GCL approaches with structural augmentations…

Machine Learning · Computer Science 2025-12-03 Qirui Ji , Bin Qin , Yifan Jin , Yunze Zhao , Chuxiong Sun , Changwen Zheng , Jianwen Cao , Jiangmeng Li

By generating new yet effective data, data augmentation has become a promising method to mitigate the data sparsity problem in sequential recommendation. Existing works focus on augmenting the original data but rarely explore the issue of…

Information Retrieval · Computer Science 2024-12-24 Yizhou Dang , Jiahui Zhang , Yuting Liu , Enneng Yang , Yuliang Liang , Guibing Guo , Jianzhe Zhao , Xingwei Wang

Sequential recommendation is an extensively explored approach to capturing users' evolving preferences based on past interactions, aimed at predicting their next likely choice. Despite significant advancements in this domain, including…

Information Retrieval · Computer Science 2025-04-15 Kowei Shih , Yi Han , Li Tan

During the last decades, learning a low-dimensional space with discriminative information for dimension reduction (DR) has gained a surge of interest. However, it's not accessible for these DR methods to achieve satisfactory performance…

Machine Learning · Computer Science 2019-11-19 Xiangzhu Meng , Huibing Wang , Lin Feng

Sequential recommendation effectively models dynamic user interests but continues to face challenges related to data sparsity. While self-supervised learning has alleviated this issue to some extent, most existing methods focus exclusively…

Information Retrieval · Computer Science 2026-05-28 Ziqiang Cui , Xing Tang , Peiyang Liu , Xiaokun Zhang , Shiwei Li , Xiuqiang He , Chen Ma

Sequential recommender systems (SRSs) aim to suggest next item for a user based on her historical interaction sequences. Recently, many research efforts have been devoted to attenuate the influence of noisy items in sequences by either…

Information Retrieval · Computer Science 2024-06-21 Xiaofei Zhu , Liang Li , Weidong Liu , Xin Luo

We propose HyMoERec, a novel sequential recommendation framework that addresses the limitations of uniform Position-wise Feed-Forward Networks in existing models. Current approaches treat all user interactions and items equally, overlooking…

Information Retrieval · Computer Science 2025-11-11 Kunrong Li , Zhu Sun , Kwan Hui Lim

Anomaly detection aims at identifying deviant samples from the normal data distribution. Contrastive learning has provided a successful way to sample representation that enables effective discrimination on anomalies. However, when…

Computer Vision and Pattern Recognition · Computer Science 2022-07-26 Gaoang Wang , Yibing Zhan , Xinchao Wang , Mingli Song , Klara Nahrstedt

We introduce a novel framework for representation learning in head pose estimation (HPE). Previously such a scheme was difficult due to head pose data sparsity, making triplet sampling infeasible. Recent progress in 3D generative…

Computer Vision and Pattern Recognition · Computer Science 2024-12-04 Ting-Ruen Wei , Haowei Liu , Huei-Chung Hu , Xuyang Wu , Yi Fang , Hsin-Tai Wu

This paper proposes a cold start recommendation model that integrates contrastive learning, aiming to solve the problem of performance degradation of recommendation systems in cold start scenarios due to the scarcity of user and item…

Information Retrieval · Computer Science 2025-02-07 Jiacheng Hu , Tai An , Zidong Yu , Junliang Du , Yuanshuai Luo

Graph clustering is a crucial task in network analysis with widespread applications, focusing on partitioning nodes into distinct groups with stronger intra-group connections than inter-group ones. Recently, contrastive learning has…

Machine Learning · Computer Science 2024-08-20 Xunlian Wu , Jingqi Hu , Anqi Zhang , Yining Quan , Qiguang Miao , Peng Gang Sun

Transformers have demonstrated exceptional in-context learning (ICL) capabilities, enabling applications across natural language processing, computer vision, and sequential decision-making. In reinforcement learning, ICL reframes learning…

Machine Learning · Computer Science 2025-11-14 Oliver Dippel , Alexei Lisitsa , Bei Peng

Existing Masked Image Modeling methods apply fixed mask patterns to guide the self-supervised training. As those mask patterns resort to different criteria to depict image contents, sticking to a fixed pattern leads to a limited vision cues…

Computer Vision and Pattern Recognition · Computer Science 2025-04-15 Zhanzhou Feng , Shiliang Zhang

Contrastive Learning (CL)-based recommender systems have gained prominence in the context of Heterogeneous Graph (HG) due to their capacity to enhance the consistency of representations across different views. However, existing frameworks…

Information Retrieval · Computer Science 2024-07-30 Lei Sang , Yu Wang , Yi Zhang , Yiwen Zhang , Xindong Wu

Contrastive learning (CL) has emerged as a promising technique for improving recommender systems, addressing the challenge of data sparsity by using self-supervised signals from raw data. Integration of CL with graph convolutional network…

Information Retrieval · Computer Science 2024-08-23 Jeongwhan Choi , Hyowon Wi , Chaejeong Lee , Sung-Bae Cho , Dongha Lee , Noseong Park

Recently, self-supervised methods show remarkable achievements in image-level representation learning. Nevertheless, their image-level self-supervisions lead the learned representation to sub-optimal for dense prediction tasks, such as…

Computer Vision and Pattern Recognition · Computer Science 2021-11-23 Yunsung Lee , Teakgyu Hong , Han-Cheol Cho , Junbum Cha , Seungryong Kim

Sequential recommendation models have achieved state-of-the-art performance using self-attention mechanism. It has since been found that moving beyond only using item ID and positional embeddings leads to a significant accuracy boost when…

Information Retrieval · Computer Science 2024-09-10 Linsey Pang , Amir Hossein Raffiee , Wei Liu , Keld Lundgaard

Multiview clustering (MVC) segregates data samples into meaningful clusters by synthesizing information across multiple views. Moreover, deep learning-based methods have demonstrated their strong feature learning capabilities in MVC…

Machine Learning · Computer Science 2024-03-22 Hao Yang , Hua Mao , Wai Lok Woo , Jie Chen , Xi Peng

Sequential recommendation (SR) models often capture user preferences based on the historically interacted item IDs, which usually obtain sub-optimal performance when the interaction history is limited. Content-based sequential…

Information Retrieval · Computer Science 2025-10-20 Donglin Zhou , Weike Pan , Zhong Ming
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