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User-centric recommendation has become essential for delivering personalized services, as it enables systems to adapt to users' evolving behaviors while respecting their long-term preferences and privacy constraints. Although federated…

Information Retrieval · Computer Science 2026-03-19 Chunxu Zhang , Zhiheng Xue , Guodong Long , Weipeng Zhang , Bo Yang

Recommender systems have made significant strides in various industries, primarily driven by extensive efforts to enhance recommendation accuracy. However, this pursuit of accuracy has inadvertently given rise to echo chamber/filter bubble…

Information Retrieval · Computer Science 2024-02-07 Tao Zhang , Luwei Yang , Zhibo Xiao , Wen Jiang , Wei Ning

Deep Research agents driven by LLMs have automated the scholarly discovery pipeline, from planning and query formulation to iterative web exploration. Yet they remain constrained by a static, ``one-size-fits-all'' retrieval paradigm.…

Information Retrieval · Computer Science 2026-05-12 Xiaopeng Li , Wenlin Zhang , Yingyi Zhang , Pengyue Jia , Yejing Wang , Yichao Wang , Yong Liu , Huifeng Guo , Xiangyu Zhao

Personalized sequential recommendation aims to predict appropriate items for users based on their behavioral sequences. To alleviate data sparsity and interest drift issues, conventional approaches typically incorporate auxiliary behaviors…

Information Retrieval · Computer Science 2025-08-08 Yongfu Zha , Xinxin Dong , Haokai Ma , Yonghui Yang , Xiaodong Wang

GPRec explicitly categorizes users into groups in a learnable manner and aligns them with corresponding group embeddings. We design the dual group embedding space to offer a diverse perspective on group preferences by contrasting positive…

Information Retrieval · Computer Science 2024-10-29 Yejing Wang , Dong Xu , Xiangyu Zhao , Zhiren Mao , Peng Xiang , Ling Yan , Yao Hu , Zijian Zhang , Xuetao Wei , Qidong Liu

Lifelong person re-identification (LReID) exhibits a contradictory relationship between intra-domain discrimination and inter-domain gaps when learning from continuous data. Intra-domain discrimination focuses on individual nuances (i.e.,…

Computer Vision and Pattern Recognition · Computer Science 2025-09-04 Shiben Liu , Huijie Fan , Qiang Wang , Weihong Ren , Yandong Tang , Yang Cong

Cold-start problems are enormous challenges in practical recommender systems. One promising solution for this problem is cross-domain recommendation (CDR) which leverages rich information from an auxiliary (source) domain to improve the…

Information Retrieval · Computer Science 2021-05-12 Yongchun Zhu , Kaikai Ge , Fuzhen Zhuang , Ruobing Xie , Dongbo Xi , Xu Zhang , Leyu Lin , Qing He

Collaborative Metric Learning (CML) has recently emerged as a popular method in recommendation systems (RS), closing the gap between metric learning and collaborative filtering. Following the convention of RS, existing practices exploit…

Information Retrieval · Computer Science 2024-09-04 Shilong Bao , Qianqian Xu , Zhiyong Yang , Yuan He , Xiaochun Cao , Qingming Huang

We demonstrate that user preferences can be represented and predicted across topical domains using large-scale social modeling. Given information about popular entities favored by a user, we project the user into a social embedding space…

Social and Information Networks · Computer Science 2026-03-12 Nir Lotan , Adir Solomon , Ido Guy , Einat Minkov

For recommender systems in internet platforms, search activities provide additional insights into user interest through query-click interactions with items, and are thus widely used for enhancing personalized recommendation. However, these…

Information Retrieval · Computer Science 2024-12-02 Jiajun Cui , Xu Chen , Shuai Xiao , Chen Ju , Jinsong Lan , Qingwen Liu , Wei Zhang

Cross-domain Sequential Recommendation (CDSR) has been proposed to enrich user-item interactions by incorporating information from various domains. Despite current progress, the imbalance issue and transition issue hinder further…

Information Retrieval · Computer Science 2026-05-18 Ziwei Liu , Qidong Liu , Wanyu Wang , Yejing Wang , Pengyue Jia , Tong Xu , Wei Huang , Chong Chen , Xiangyu Zhao

Cross-domain sequential recommendation is an important development direction of recommender systems. It combines the characteristics of sequential recommender systems and cross-domain recommender systems, which can capture the dynamic…

Information Retrieval · Computer Science 2024-01-30 Zhaohao Lin , Weike Pan , Zhong Ming

Modern online service providers such as online shopping platforms often provide both search and recommendation (S&R) services to meet different user needs. Rarely has there been any effective means of incorporating user behavior data from…

Information Retrieval · Computer Science 2023-05-19 Zihua Si , Zhongxiang Sun , Xiao Zhang , Jun Xu , Xiaoxue Zang , Yang Song , Kun Gai , Ji-Rong Wen

The two primary tasks in the search recommendation system are search relevance matching and click-through rate (CTR) prediction -- the former focuses on seeking relevant items for user queries whereas the latter forecasts which item may…

Information Retrieval · Computer Science 2025-03-27 Rong Chen , Shuzhi Cao , Ailong He , Shuguang Han , Jufeng Chen

Sequential recommendation aims to capture user preferences by modeling sequential patterns in user-item interactions. However, these models are often influenced by noise such as accidental interactions, leading to suboptimal performance.…

Information Retrieval · Computer Science 2025-10-07 Tongzhou Wu , Yuhao Wang , Maolin Wang , Chi Zhang , Xiangyu Zhao

Cross-domain cold-start recommendation is an increasingly emerging issue for recommender systems. Existing works mainly focus on solving either cross-domain user recommendation or cold-start content recommendation. However, when a new…

Information Retrieval · Computer Science 2021-12-08 Huiling Zhou , Jie Liu , Zhikang Li , Jin Yu , Hongxia Yang

Conventional sequential recommendation models have achieved remarkable success in mining implicit behavioral patterns. However, these architectures remain structurally blind to explicit user intent: they struggle to adapt when a user's…

Information Retrieval · Computer Science 2026-03-06 Fuyuan Lyu , Chenglin Luo , Qiyuan Zhang , Yupeng Hou , Haolun Wu , Xing Tang , Xue Liu , Jin L. C. Guo , Xiuqiang He

Multi-domain learning (MDL) has become a prominent topic in enhancing the quality of personalized services. It's critical to learn commonalities between domains and preserve the distinct characteristics of each domain. However, this leads…

Information Retrieval · Computer Science 2024-11-21 Zhutian Lin , Junwei Pan , Haibin Yu , Xi Xiao , Ximei Wang , Zhixiang Feng , Shifeng Wen , Shudong Huang , Dapeng Liu , Lei Xiao

Leveraging Large Language Models (LLMs) for recommendation has demonstrated notable success in various domains, showcasing their potential for open-domain recommendation. A key challenge to advancing open-domain recommendation lies in…

Information Retrieval · Computer Science 2025-07-29 Honghui Bao , Wenjie Wang , Xinyu Lin , Fengbin Zhu , Teng Sun , Fuli Feng , Tat-Seng Chua

Cross-Domain Recommendation (CDR) stands as a pivotal technology addressing issues of data sparsity and cold start by transferring general knowledge from the source to the target domain. However, existing CDR models suffer limitations in…

Information Retrieval · Computer Science 2023-10-23 Bowen Hao , Chaoqun Yang , Lei Guo , Junliang Yu , Hongzhi Yin