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Contrastive Learning (CL) has recently emerged as a powerful technique in recommendation systems, particularly for its capability to harness self-supervised signals from perturbed views to mitigate the persistent challenge of data sparsity.…

Information Retrieval · Computer Science 2025-04-08 Zheyu Chen , Jinfeng Xu , Yutong Wei , Ziyue Peng

Contrastive learning is a prevalent technique in self-supervised vision representation learning, typically generating positive pairs by applying two data augmentations to the same image. Designing effective data augmentation strategies is…

Computer Vision and Pattern Recognition · Computer Science 2025-04-17 Yudong Zhang , Ruobing Xie , Jiansheng Chen , Xingwu Sun , Zhanhui Kang , Yu Wang

Contrastive graph node clustering via learnable data augmentation is a hot research spot in the field of unsupervised graph learning. The existing methods learn the sampling distribution of a pre-defined augmentation to generate data-driven…

Machine Learning · Computer Science 2023-10-23 Xihong Yang , Cheng Tan , Yue Liu , Ke Liang , Siwei Wang , Sihang Zhou , Jun Xia , Stan Z. Li , Xinwang Liu , En Zhu

Graph neural networks (GNNs) have advanced recommender systems by modeling interaction relationships. However, existing graph-based recommenders rely on sparse ID features and do not fully exploit textual information, resulting in low…

Information Retrieval · Computer Science 2025-11-24 Hailong Luo , Bin Wu , Hongyong Jia , Qingqing Zhu , Lianlei Shan

Graph contrastive learning (GCL) has emerged as a representative graph self-supervised method, achieving significant success. The currently prevalent optimization objective for GCL is InfoNCE. Typically, it employs augmentation techniques…

Machine Learning · Computer Science 2024-03-22 Yulan Hu , Sheng Ouyang , Jingyu Liu , Ge Chen , Zhirui Yang , Junchen Wan , Fuzheng Zhang , Zhongyuan Wang , Yong Liu

Graph contrastive learning (GCL) aims to learn representations from unlabeled graph data in a self-supervised manner and has developed rapidly in recent years. However, edgelevel contrasts are not well explored by most existing GCL methods.…

Machine Learning · Computer Science 2024-12-17 Yujun Li , Hongyuan Zhang , Yuan Yuan

The rise of self-supervised learning, which operates without the need for labeled data, has garnered significant interest within the graph learning community. This enthusiasm has led to the development of numerous Graph Contrastive Learning…

Machine Learning · Computer Science 2024-02-27 Qian Ma , Hongliang Chi , Hengrui Zhang , Kay Liu , Zhiwei Zhang , Lu Cheng , Suhang Wang , Philip S. Yu , Yao Ma

Self-supervised learning (especially contrastive learning) methods on heterogeneous graphs can effectively get rid of the dependence on supervisory data. Meanwhile, most existing representation learning methods embed the heterogeneous…

Machine Learning · Computer Science 2022-06-28 Shichao Zhu , Chuan Zhou , Anfeng Cheng , Shirui Pan , Shuaiqiang Wang , Dawei Yin , Bin Wang

Graph clustering is essential in graph analysis for revealing structural patterns and node communities. Despite recent advances in self-supervised contrastive learning that have improved clustering via structural and attribute signals,…

Machine Learning · Computer Science 2026-05-28 Lei Zhang , Fubo Sun , Haipeng Yang , Zhong Guan , Likang Wu

Existing studies show that node representations generated by graph neural networks (GNNs) are vulnerable to adversarial attacks, such as unnoticeable perturbations of adjacent matrix and node features. Thus, it is requisite to learn robust…

Machine Learning · Computer Science 2022-04-29 Jiayan Guo , Shangyang Li , Yue Zhao , Yan Zhang

Recommender systems (RecSys) play a vital role in online platforms, offering users personalized suggestions amidst vast information. Graph contrastive learning aims to learn from high-order collaborative filtering signals with unsupervised…

Information Retrieval · Computer Science 2024-04-29 Weizhi Zhang , Liangwei Yang , Zihe Song , Henry Peng Zou , Ke Xu , Yuanjie Zhu , Philip S. Yu

Graph contrastive learning (GCL) has become a central paradigm for self-supervised representation learning in computational intelligence, with applications spanning recommendation, anomaly detection, and personalization. A key limitation of…

Machine Learning · Computer Science 2026-05-06 Adnan Ali , Jinlong Li , Syed Muhammad Israr , Ali Kashif Bashir

In graph self-supervised learning, masked autoencoders (MAE) and contrastive learning (CL) are two prominent paradigms. MAE focuses on reconstructing masked elements, while CL maximizes similarity between augmented graph views. Recent…

Machine Learning · Computer Science 2025-06-10 Di Lin , Wanjing Ren , Xuanbin Li , Rui Zhang

Contrastive learning enables learning useful audio and speech representations without ground-truth labels by maximizing the similarity between latent representations of similar signal segments. In this framework various data augmentation…

Audio and Speech Processing · Electrical Eng. & Systems 2022-04-11 Salah Zaiem , Titouan Parcollet , Slim Essid

We introduce a self-supervised approach for learning node and graph level representations by contrasting structural views of graphs. We show that unlike visual representation learning, increasing the number of views to more than two or…

Machine Learning · Computer Science 2020-06-11 Kaveh Hassani , Amir Hosein Khasahmadi

Graph Contrastive Learning (GCL) has emerged as a prominent framework for unsupervised graph representation learning. However, relying on augmentation design alone to define the invariances learned by GCL can be brittle under structural…

Machine Learning · Computer Science 2026-04-30 Mengyang Zhao , Longlong Li , Cunquan Qu

Sequential Recommendation (SR) has received increasing attention due to its ability to capture user dynamic preferences. Recently, Contrastive Learning (CL) provides an effective approach for sequential recommendation by learning invariance…

Information Retrieval · Computer Science 2023-10-24 Yongjing Hao , Pengpeng Zhao , Junhua Fang , Jianfeng Qu , Guanfeng Liu , Fuzhen Zhuang , Victor S. Sheng , Xiaofang Zhou

Leading graph contrastive learning (GCL) methods perform graph augmentations in two fashions: (1) randomly corrupting the anchor graph, which could cause the loss of semantic information, or (2) using domain knowledge to maintain salient…

Machine Learning · Computer Science 2022-06-17 Sihang Li , Xiang Wang , An zhang , Yingxin Wu , Xiangnan He , Tat-Seng Chua

While some powerful neural network architectures (e.g., Transformer, Graph Neural Networks) have achieved improved performance in sequential recommendation with high-order item dependency modeling, they may suffer from poor representation…

Information Retrieval · Computer Science 2023-06-02 Yaowen Ye , Lianghao Xia , Chao Huang

Learning on text-attributed graphs (TAGs), in which nodes are associated with one or more texts, has been the subject of much recent work. However, most approaches tend to make strong assumptions about the downstream task of interest, are…

Computation and Language · Computer Science 2024-07-11 William Brannon , Wonjune Kang , Suyash Fulay , Hang Jiang , Brandon Roy , Deb Roy , Jad Kabbara