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In this work, we aim to learn multi-level user intents from the co-interacted patterns of items, so as to obtain high-quality representations of users and items and further enhance the recommendation performance. Towards this end, we…

Information Retrieval · Computer Science 2021-10-29 Wei Yinwei , Wang Xiang , He Xiangnan , Nie Liqiang , Rui Yong , Chua Tat-Seng

Recommender systems, which analyze users' preference patterns to suggest potential targets, are indispensable in today's society. Collaborative Filtering (CF) is the most popular recommendation model. Specifically, Graph Neural Network…

Information Retrieval · Computer Science 2021-01-06 Zhuang Liu , Yunpu Ma , Yuanxin Ouyang , Zhang Xiong

Graph Contrastive Learning (GCL), which fuses graph neural networks with contrastive learning, has evolved as a pivotal tool in user-item recommendations. While promising, existing GCL methods often lack explicit modeling of hierarchical…

Information Retrieval · Computer Science 2025-05-27 Jiawei Xue , Zhen Yang , Haitao Lin , Ziji Zhang , Luzhu Wang , Yikun Gu , Yao Xu , Xin Li

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

Session-based recommendation (SBR) is proposed to recommend items within short sessions given that user profiles are invisible in various scenarios nowadays, such as e-commerce and short video recommendation. There is a common scenario that…

Information Retrieval · Computer Science 2022-04-12 Chuan Cui , Qi Shen , Shixuan Zhu , Yitong Pang , Yiming Zhang , Hanning Gao , Zhihua Wei

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

Recent advances in recommendation with large language models (LLMs) often rely on either commonsense augmentation at the item-category level or implicit intent modeling on existing knowledge graphs. However, such approaches struggle to…

Information Retrieval · Computer Science 2026-03-13 Wenqing Zheng , Noah Fatsi , Daniel Barcklow , Dmitri Kalaev , Steven Yao , Owen Reinert , C. Bayan Bruss , Daniele Rosa

Contrastive learning has proven effective in training sequential recommendation models by incorporating self-supervised signals from augmented views. Most existing methods generate multiple views from the same interaction sequence through…

Information Retrieval · Computer Science 2025-04-24 Yuanpeng Qu , Hajime Nobuhara

Graph data widely exists in real life, with large amounts of data and complex structures. It is necessary to map graph data to low-dimensional embedding. Graph classification, a critical graph task, mainly relies on identifying the…

Machine Learning · Computer Science 2023-10-26 Yuan Li , Li Liu , Penggang Chen , Youmin Zhang , Guoyin Wang

Tripartite graph-based recommender systems markedly diverge from traditional models by recommending unique combinations such as user groups and item bundles. Despite their effectiveness, these systems exacerbate the longstanding cold-start…

Information Retrieval · Computer Science 2024-07-09 Linxin Guo , Yaochen Zhu , Min Gao , Yinghui Tao , Junliang Yu , Chen Chen

Sequential recommendation systems aim to capture users' evolving preferences from their interaction histories. Recent reasoningenhanced methods have shown promise by introducing deliberate, chain-of-thought-like processes with intermediate…

Information Retrieval · Computer Science 2025-12-17 Yifan Shao , Peilin Zhou

Graph Neural Network (GNN) based recommender systems have been attracting more and more attention in recent years due to their excellent performance in accuracy. Representing user-item interactions as a bipartite graph, a GNN model…

Information Retrieval · Computer Science 2022-11-29 Liangwei Yang , Shengjie Wang , Yunzhe Tao , Jiankai Sun , Xiaolong Liu , Philip S. Yu , Taiqing Wang

In recent years, graph contrastive learning (GCL) has received increasing attention in recommender systems due to its effectiveness in reducing bias caused by data sparsity. However, most existing GCL models rely on heuristic approaches and…

Information Retrieval · Computer Science 2024-07-23 Jiakai Tang , Sunhao Dai , Zexu Sun , Xu Chen , Jun Xu , Wenhui Yu , Lantao Hu , Peng Jiang , Han Li

Intent is a significant latent factor influencing user-item interaction sequences. Prevalent sequence recommendation models that utilize contrastive learning predominantly rely on single-intent representations to direct the training…

Machine Learning · Computer Science 2024-09-16 Junshu Huang , Zi Long , Xianghua Fu , Yin Chen

In recommender systems, knowledge graph (KG) can offer critical information that is lacking in the original user-item interaction graph (IG). Recent process has explored this direction and shows that contrastive learning is a promising way…

Information Retrieval · Computer Science 2023-09-26 Haibo Ye , Xinjie Li , Yuan Yao , Hanghang Tong

Contrastive learning (CL) has recently been demonstrated critical in improving recommendation performance. The underlying principle of CL-based recommendation models is to ensure the consistency between representations derived from…

Information Retrieval · Computer Science 2023-06-21 Junliang Yu , Xin Xia , Tong Chen , Lizhen Cui , Nguyen Quoc Viet Hung , Hongzhi Yin

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

Social recommendation based on social network has achieved great success in improving the performance of recommendation system. Since social network (user-user relations) and user-item interactions are both naturally represented as…

Information Retrieval · Computer Science 2021-09-27 Yiming Zhang , Lingfei Wu , Qi Shen , Yitong Pang , Zhihua Wei , Fangli Xu , Ethan Chang , Bo Long

Social recommendations utilize social relations to enhance the representation learning for recommendations. Most social recommendation models unify user representations for the user-item interactions (collaborative domain) and social…

Information Retrieval · Computer Science 2023-10-04 Jiahao Wu , Wenqi Fan , Jingfan Chen , Shengcai Liu , Qing Li , Ke Tang

Recommender systems presently utilize vast amounts of data and play a pivotal role in enhancing user experiences. Graph Convolution Networks (GCNs) have surfaced as highly efficient models within the realm of recommender systems due to…

Information Retrieval · Computer Science 2025-05-27 X Fan , F Mo , C Chen , H Yamana