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Cross-domain recommendation (CDR) is an important method to improve recommender system performance, especially when observations in target domains are sparse. However, most existing cross-domain recommendations fail to fully utilize the…

Information Retrieval · Computer Science 2024-01-23 Yuhao Luo , Shiwei Ma , Mingjun Nie , Changping Peng , Zhangang Lin , Jingping Shao , Qianfang Xu

Cross-domain recommendation (CDR) methods predominantly leverage overlapping users to transfer knowledge from a source domain to a target domain. However, through empirical studies, we uncover a critical bias inherent in these approaches:…

Information Retrieval · Computer Science 2025-07-24 Weixin Chen , Yuhan Zhao , Li Chen , Weike Pan

Cross-domain recommendation aims to leverage knowledge from multiple domains to alleviate the data sparsity and cold-start problems in traditional recommender systems. One popular paradigm is to employ overlapping user representations to…

Information Retrieval · Computer Science 2023-01-30 Chuang Zhao , Hongke Zhao , Ming He , Jian Zhang , Jianping Fan

Cross-Domain Sequential Recommendation (CDSR) leverages user behaviors across domains to enhance recommendation quality. However, naive aggregation of sequential signals can introduce conflicting domain-specific preferences, leading to…

Information Retrieval · Computer Science 2025-09-12 Xiaoxin Ye , Chengkai Huang , Hongtao Huang , Lina Yao

Cross-domain Recommendation (CDR) exploits multi-domain correlations to alleviate data sparsity. As a core task within this field, inter-domain recommendation focuses on predicting preferences for users who interact in a source domain but…

Information Retrieval · Computer Science 2026-04-08 Ziang Lu , Lei Sang , Lin Mu , Yiwen Zhang

Cross-domain recommendation (CDR) methods are proposed to tackle the sparsity problem in click through rate (CTR) estimation. Existing CDR methods directly transfer knowledge from the source domains to the target domain and ignore the…

Machine Learning · Computer Science 2024-11-15 Ke Xu , Ziliang Wang , Wei Zheng , Yuhao Ma , Chenglin Wang , Nengxue Jiang , Cai Cao

Sequential recommendation predicts user preferences over time and has achieved remarkable success. However, the growing length of user interaction sequences and the complex entanglement of evolving user interests and intentions introduce…

Information Retrieval · Computer Science 2025-08-06 Haoran Zhang , Jingtong Liu , Jiangzhou Deng , Junpeng Guo

Cross-domain recommendation (CDR), aiming to extract and transfer knowledge across domains, has attracted wide attention for its efficacy in addressing data sparsity and cold-start problems. Despite significant advances in representation…

Information Retrieval · Computer Science 2024-04-02 Luankang Zhang , Hao Wang , Suojuan Zhang , Mingjia Yin , Yongqiang Han , Jiaqing Zhang , Defu Lian , Enhong Chen

Cross-Domain Sequential Recommendation (CDSR) aims to predict future user interactions based on historical interactions across multiple domains. The key challenge in CDSR is effectively capturing cross-domain user preferences by fully…

Information Retrieval · Computer Science 2025-02-28 Wangyu Wu , Siqi Song , Xianglin Qiu , Xiaowei Huang , Fei Ma , Jimin Xiao

Sequential Recommender Systems (SRS) aim to predict users' next interaction based on their historical behaviors, while still facing the challenge of data sparsity. With the rapid advancement of Multimodal Large Language Models (MLLMs),…

Information Retrieval · Computer Science 2026-02-17 Mingyao Huang , Qidong Liu , Wenxuan Yang , Moranxin Wang , Yuqi Sun , Haiping Zhu , Feng Tian , Yan Chen

Cross-domain recommendation (CDR) has demonstrated to be an effective solution for alleviating the user cold-start issue. By leveraging rich user-item interactions available in a richly informative source domain, CDR could improve the…

Information Retrieval · Computer Science 2026-04-29 Xiaodong Li , Jiawei Sheng , Jiangxia Cao , Xinghua Zhang , Wenyuan Zhang , Yong Sun , Shirui Pan , Zhihong Tian , Tingwen Liu

Cross-domain recommender (CDR) systems aim to transfer knowledge from data-rich domains to data-sparse ones, alleviating sparsity and cold-start issues present in conventional single-domain recommenders. However, many CDR approaches rely on…

Information Retrieval · Computer Science 2026-03-03 Ziyin Xiao , Toyotaro Suzumura

Sequential recommendations have drawn significant attention in modeling the user's historical behaviors to predict the next item. With the booming development of multimodal data (e.g., image, text) on internet platforms, sequential…

Information Retrieval · Computer Science 2024-12-12 Changhong Li , Zhiqiang Guo

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

The cold-start recommendation is an urgent problem in contemporary online applications. It aims to provide users whose behaviors are literally sparse with as accurate recommendations as possible. Many data-driven algorithms, such as the…

Information Retrieval · Computer Science 2021-10-19 Xiaowen Huang , Jitao Sang , Jian Yu , Changsheng Xu

Sequential recommendation (SR) aims to predict the subsequent behaviors of users by understanding their successive historical behaviors. Recently, some methods for SR are devoted to alleviating the data sparsity problem (i.e., limited…

Information Retrieval · Computer Science 2022-08-30 Ziyang Wang , Huoyu Liu , Wei Wei , Yue Hu , Xian-Ling Mao , Shaojian He , Rui Fang , Dangyang chen

Non-overlapping Cross-domain Sequential Recommendation (NCSR) is the task that focuses on domain knowledge transfer without overlapping entities. Compared with traditional Cross-domain Sequential Recommendation (CSR), NCSR poses several…

Information Retrieval · Computer Science 2025-11-25 Lei Guo , Chenlong Song , Feng Guo , Xiaohui Han , Xiaojun Chang , Lei Zhu

A cross-domain recommendation has shown promising results in solving data-sparsity and cold-start problems. Despite such progress, existing methods focus on domain-shareable information (overlapped users or same contexts) for a knowledge…

Information Retrieval · Computer Science 2023-04-13 Yoonhyuk Choi , Jiho Choi , Taewook Ko , Hyungho Byun , Chong-Kwon Kim

Recommender systems is set up to address the issue of information overload in traditional information retrieval systems, which is focused on recommending information that is of most interest to users from massive information. Generally,…

Information Retrieval · Computer Science 2026-02-27 Xiaoqing Chen , Zhitao Li , Weike Pan , Zhong Ming

Cross-Domain Recommendation (CDR) have received widespread attention due to their ability to utilize rich information across domains. However, most existing CDR methods assume an ideal static condition that is not practical in industrial…

Information Retrieval · Computer Science 2024-10-16 Heyuan Huang , Xingyu Lou , Chaochao Chen , Pengxiang Cheng , Yue Xin , Chengwei He , Xiang Liu , Jun Wang