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Contrastive learning -- a modern approach to extract useful representations from unlabeled data by training models to distinguish similar samples from dissimilar ones -- has driven significant progress in foundation models. In this work, we…

Machine Learning · Statistics 2025-10-15 Licong Lin , Song Mei

Graph contrastive learning (GCL) emerges as the most representative approach for graph representation learning, which leverages the principle of maximizing mutual information (InfoMax) to learn node representations applied in downstream…

Machine Learning · Computer Science 2022-11-22 Yige Yuan , Bingbing Xu , Huawei Shen , Qi Cao , Keting Cen , Wen Zheng , Xueqi Cheng

Attributed graph clustering holds significant importance in modern data analysis. However, due to the complexity of graph data and the heterogeneity of node attributes, leveraging graph information for clustering remains challenging. To…

Machine Learning · Computer Science 2025-08-01 Binxiong Li , Xu Xiang , Xue Li , Quanzhou Lou , Binyu Zhao , Yujie Liu , Huijie Tang , Benhan Yang

Advanced graph neural networks have shown great potentials in graph classification tasks recently. Different from node classification where node embeddings aggregated from local neighbors can be directly used to learn node labels, graph…

Machine Learning · Computer Science 2022-03-16 Hao Jia , Junzhong Ji , Minglong Lei

Heterogeneous Graphs (HGs) effectively model complex relationships in the real world through multi-type nodes and edges. In recent years, inspired by self-supervised learning (SSL), contrastive learning (CL)-based Heterogeneous Graphs…

Machine Learning · Computer Science 2025-05-06 Yu Wang , Lei Sang , Yi Zhang , Yiwen Zhang , Xindong Wu

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 Neural Networks (GNNs) have achieved remarkable success in learning node representations and have shown strong performance in tasks such as node classification. However, recent findings indicate that the presence of noise in…

Machine Learning · Computer Science 2025-07-01 Yancheng Wang , Yingzhen Yang

In this paper, we study the problem of unsupervised graph representation learning by harnessing the control properties of dynamical networks defined on graphs. Our approach introduces a novel framework for contrastive learning, a widely…

Machine Learning · Computer Science 2024-04-19 Obaid Ullah Ahmad , Anwar Said , Mudassir Shabbir , Waseem Abbas , Xenofon Koutsoukos

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

Contrastive learning has emerged as a pivotal framework for representation learning, underpinning advances in both unimodal and bimodal applications like SimCLR and CLIP. To address fundamental limitations like large batch size dependency…

Machine Learning · Computer Science 2024-12-12 Ajay Jagannath , Aayush Upadhyay , Anant Mehta

Graph representation learning on Analog-Mixed Signal (AMS) circuits is crucial for various downstream tasks, e.g., parasitic estimation. However, the scarcity of design data, the unbalanced distribution of labels, and the inherent diversity…

Machine Learning · Computer Science 2025-10-13 Shan Shen , Shenglu Hua , Jiajun Zou , Jiawei Liu , Jianwang Zhai , Chuan Shi , Wenjian Yu

Recent years have seen a rapid growth of utilizing graph neural networks (GNNs) in the biomedical domain for tackling drug-related problems. However, like any other deep architectures, GNNs are data hungry. While requiring labels in real…

Biological Physics · Physics 2022-05-03 Mengying Sun , Jing Xing , Huijun Wang , Bin Chen , Jiayu Zhou

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

Graph Neural Networks (GNNs) are powerful learning methods for recommender systems owing to their robustness in handling complicated user-item interactions. Recently, the integration of contrastive learning with GNNs has demonstrated…

Machine Learning · Computer Science 2024-08-12 Junfeng Long , Hao Wu

Leveraging the diversity and quantity of data provided by various graph-structured data augmentations while preserving intrinsic semantic information is challenging. Additionally, successive layers in graph neural network (GNN) tend to…

Machine Learning · Computer Science 2026-03-19 Jie Chen , Hua Mao , Chuanbin Liu , Zhu Wang , Xi Peng

Self-supervised learning on graphs can be bifurcated into contrastive and generative methods. Contrastive methods, also known as graph contrastive learning (GCL), have dominated graph self-supervised learning in the past few years, but the…

Machine Learning · Computer Science 2024-02-13 Liang Wang , Xiang Tao , Qiang Liu , Shu Wu , Liang Wang

Graph classification has gained significant attention due to its applications in chemistry, social networks, and bioinformatics. While Graph Neural Networks (GNNs) effectively capture local structural patterns, they often overlook global…

Machine Learning · Computer Science 2025-12-03 Ahmet Sami Korkmaz , Selim Coskunuzer , Md Joshem Uddin

Recently many efforts have been devoted to applying graph neural networks (GNNs) to molecular property prediction which is a fundamental task for computational drug and material discovery. One of major obstacles to hinder the successful…

Machine Learning · Computer Science 2021-09-27 Shuangli Li , Jingbo Zhou , Tong Xu , Dejing Dou , Hui Xiong

Contrastive learning is an effective unsupervised method in graph representation learning, and the key component of contrastive learning lies in the construction of positive and negative samples. Previous methods usually utilize the…

Machine Learning · Computer Science 2024-02-07 Shengyu Feng , Baoyu Jing , Yada Zhu , Hanghang Tong

This paper systematically investigates the effectiveness of various augmentations for contrastive self-supervised learning of electrocardiogram (ECG) signals and identifies the best parameters. The baseline of our proposed self-supervised…

Signal Processing · Electrical Eng. & Systems 2022-06-16 Sahar Soltanieh , Ali Etemad , Javad Hashemi