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Graph contrastive learning (GCL), as an emerging self-supervised learning technique on graphs, aims to learn representations via instance discrimination. Its performance heavily relies on graph augmentation to reflect invariant patterns…

Machine Learning · Computer Science 2023-06-22 Lu Lin , Jinghui Chen , Hongning Wang

Graph representation learning has attracted a surge of interest recently, whose target at learning discriminant embedding for each node in the graph. Most of these representation methods focus on supervised learning and heavily depend on…

Machine Learning · Computer Science 2021-07-07 Pengpeng Shao , Tong Liu , Dawei Zhang , Jianhua Tao , Feihu Che , Guohua Yang

Graph representation learning is fundamental for analyzing graph-structured data. Exploring invariant graph representations remains a challenge for most existing graph representation learning methods. In this paper, we propose a cross-view…

Machine Learning · Computer Science 2025-04-15 Jie Chen , Hua Mao , Wai Lok Woo , Chuanbin Liu , Xi Peng

Trapped by the label scarcity in molecular property prediction and drug design, graph contrastive learning (GCL) came forward. Leading contrastive learning works show two kinds of view generators, that is, random or learnable data…

Machine Learning · Computer Science 2025-01-16 Xueyuan Chen , Shangzhe Li , Ruomei Liu , Bowen Shi , Jiaheng Liu , Junran Wu , Ke Xu

Contrastive deep graph clustering (CDGC) leverages the power of contrastive learning to group nodes into different clusters. The quality of contrastive samples is crucial for achieving better performance, making augmentation techniques a…

Machine Learning · Computer Science 2024-08-07 Xihong Yang , Erxue Min , Ke Liang , Yue Liu , Siwei Wang , Sihang Zhou , Huijun Wu , Xinwang Liu , En Zhu

Graph representation learning has emerged as a powerful tool for preserving graph topology when mapping nodes to vector representations, enabling various downstream tasks such as node classification and community detection. However, most…

Machine Learning · Computer Science 2025-03-21 Kaizhe Fan , Quanjun Li

Graph Contrastive Learning (GCL) has emerged as the foremost approach for self-supervised learning on graph-structured data. GCL reduces reliance on labeled data by learning robust representations from various augmented views. However,…

Machine Learning · Computer Science 2025-02-20 Ruyue Liu , Rong Yin , Yong Liu , Xiaoshuai Hao , Haichao Shi , Can Ma , Weiping Wang

Graph-level contrastive learning, aiming to learn the representations for each graph by contrasting two augmented graphs, has attracted considerable attention. Previous studies usually simply assume that a graph and its augmented graph as a…

Artificial Intelligence · Computer Science 2024-04-15 Yanbei Liu , Yu Zhao , Xiao Wang , Lei Geng , Zhitao Xiao

In the domain of recommendation and collaborative filtering, Graph Contrastive Learning (GCL) has become an influential approach. Nevertheless, the reasons for the effectiveness of contrastive learning are still not well understood. In this…

Information Retrieval · Computer Science 2024-10-01 Chengkai Liu , Jianling Wang , James Caverlee

Graph Neural Network (GNNs) based methods have recently become a popular tool to deal with graph data because of their ability to incorporate structural information. The only hurdle in the performance of GNNs is the lack of labeled data.…

Machine Learning · Computer Science 2022-08-26 Maria Marrium , Arif Mahmood

Graph contrastive learning (GCL) has recently emerged as a new concept which allows for capitalizing on the strengths of graph neural networks (GNNs) to learn rich representations in a wide variety of applications which involve abundant…

Machine Learning · Computer Science 2024-06-26 Yuzhou Chen , Jose Frias , Yulia R. Gel

Unsupervised graph representation learning is critical to a wide range of applications where labels may be scarce or expensive to procure. Contrastive learning (CL) is an increasingly popular paradigm for such settings and the…

Machine Learning · Computer Science 2022-03-15 Puja Trivedi , Ekdeep Singh Lubana , Yujun Yan , Yaoqing Yang , Danai Koutra

Inspired by the success of contrastive learning (CL) in computer vision and natural language processing, graph contrastive learning (GCL) has been developed to learn discriminative node representations on graph datasets. However, the…

Machine Learning · Computer Science 2023-01-03 Zehong Wang , Qi Li , Donghua Yu , Xiaolong Han , Xiao-Zhi Gao , Shigen Shen

Graph contrastive learning (GCL) is the most representative and prevalent self-supervised learning approach for graph-structured data. Despite its remarkable success, existing GCL methods highly rely on an augmentation scheme to learn the…

Machine Learning · Computer Science 2022-06-07 Haonan Wang , Jieyu Zhang , Qi Zhu , Wei Huang

Graph contrastive learning (GCL) has emerged as a pivotal technique in the domain of graph representation learning. A crucial aspect of effective GCL is the caliber of generated positive and negative samples, which is intrinsically dictated…

Machine Learning · Computer Science 2024-02-19 Xinjian Zhao , Liang Zhang , Yang Liu , Ruocheng Guo , Xiangyu Zhao

Graph recommender (GR) is a type of graph neural network (GNNs) encoder that is customized for extracting information from the user-item interaction graph. Due to its strong performance on the recommendation task, GR has gained significant…

Machine Learning · Computer Science 2024-07-26 Wenjie Yang , Shengzhong Zhang , Jiaxing Guo , Zengfeng Huang

Graph contrastive learning defines a contrastive task to pull similar instances close and push dissimilar instances away. It learns discriminative node embeddings without supervised labels, which has aroused increasing attention in the past…

Machine Learning · Computer Science 2023-04-25 Lin Shu , Chuan Chen , Zibin Zheng

Graph Neural Networks (GNNs) are widely used in collaborative filtering to capture high-order user-item relationships. To address the data sparsity problem in recommendation systems, Graph Contrastive Learning (GCL) has emerged as a…

Information Retrieval · Computer Science 2025-07-11 Jinfeng Xu , Zheyu Chen , Shuo Yang , Jinze Li , Hewei Wang , Wei Wang , Xiping Hu , Edith Ngai

Today, there are two major understandings for graph convolutional networks, i.e., in the spectral and spatial domain. But both lack transparency. In this work, we introduce a new understanding for it -- data augmentation, which is more…

Machine Learning · Computer Science 2020-06-24 Hande Dong , Zhaolin Ding , Xiangnan He , Fuli Feng , Shuxian Bi

Graph Contrastive Learning (GCL) has emerged as a powerful tool for extracting consistent representations from graphs, independent of labeled information. However, existing methods predominantly focus on undirected graphs, disregarding the…

Machine Learning · Computer Science 2025-10-21 Daohan Su , Yang Zhang , Xunkai Li , Rong-Hua Li , Guoren Wang