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The growing popularity of language models has sparked interest in conversational recommender systems (CRS) within both industry and research circles. However, concerns regarding biases in these systems have emerged. While individual…

Information Retrieval · Computer Science 2023-09-07 Armin Moradi , Golnoosh Farnadi

Cold-start problem is still a very challenging problem in recommender systems. Fortunately, the interactions of the cold-start users in the auxiliary source domain can help cold-start recommendations in the target domain. How to transfer…

Information Retrieval · Computer Science 2021-12-21 Yongchun Zhu , Zhenwei Tang , Yudan Liu , Fuzhen Zhuang , Ruobing Xie , Xu Zhang , Leyu Lin , Qing He

Cross domain recommender system constitutes a powerful method to tackle the cold-start and sparsity problem by aggregating and transferring user preferences across multiple category domains. Therefore, it has great potential to improve…

Information Retrieval · Computer Science 2021-06-08 Pan Li , Zhichao Jiang , Maofei Que , Yao Hu , Alexander Tuzhilin

Federated cross-domain recommendation (Federated CDR) aims to collaboratively learn personalized recommendation models across heterogeneous domains while preserving data privacy. Recently, large language model (LLM)-based recommendation…

Information Retrieval · Computer Science 2026-02-19 Xinrui He , Ting-Wei Li , Tianxin Wei , Xuying Ning , Xinyu He , Wenxuan Bao , Hanghang Tong , Jingrui He

Recently, web platforms have been operating various service domains simultaneously. Targeting a platform that operates multiple service domains, we introduce a new task, Multi-Domain Recommendation to Attract Users (MDRAU), which recommends…

Information Retrieval · Computer Science 2024-04-18 Hyunjun Ju , SeongKu Kang , Dongha Lee , Junyoung Hwang , Sanghwan Jang , Hwanjo Yu

Online platforms can be divided into information-oriented and social-oriented domains. The former refers to forums or E-commerce sites that emphasize user-item interactions, like Trip.com and Amazon; whereas the latter refers to social…

Information Retrieval · Computer Science 2017-06-13 Xiang Wang , Xiangnan He , Liqiang Nie , Tat-Seng Chua

The ongoing rapid expansion of the Internet greatly increases the necessity of effective recommender systems for filtering the abundant information. Extensive research for recommender systems is conducted by a broad range of communities…

Physics and Society · Physics 2015-06-04 Linyuan Lü , Matus Medo , Chi Ho Yeung , Yi-Cheng Zhang , Zi-Ke Zhang , Tao Zhou

In industrial practice, Multi-domain Recommendation (MDR) plays a crucial role. Shared-specific architectures are widely used in industrial solutions to capture shared and unique attributes via shared and specific parameters. However, with…

Information Retrieval · Computer Science 2025-11-04 Xiaoyu Liu , Yiqing Wu , Ruidong Han , Fuzhen Zhuang , Xiang Li , Wei Lin

In this paper, we introduce Star+, a novel multi-domain model for click-through rate (CTR) prediction inspired by the Star model. Traditional single-domain approaches and existing multi-task learning techniques face challenges in…

Information Retrieval · Computer Science 2024-06-25 Çağrı Yeşil , Kaya Turgut

Sequential Recommendation (SR) characterizes evolving patterns of user behaviors by modeling how users transit among items. However, the short interaction sequences limit the performance of existing SR. To solve this problem, we focus on…

Information Retrieval · Computer Science 2022-09-22 Xiaolin Zheng , Jiajie Su , Weiming Liu , Chaochao Chen

Deep recommender systems (DRS) are critical for current commercial online service providers, which address the issue of information overload by recommending items that are tailored to the user's interests and preferences. They have…

Information Retrieval · Computer Science 2023-02-17 Bo Chen , Xiangyu Zhao , Yejing Wang , Wenqi Fan , Huifeng Guo , Ruiming Tang

Conversational recommender systems (CRS) aim to provide the recommendation service via natural language conversations. To develop an effective CRS, high-quality CRS datasets are very crucial. However, existing CRS datasets suffer from the…

Information Retrieval · Computer Science 2023-10-24 Zhipeng Zhao , Kun Zhou , Xiaolei Wang , Wayne Xin Zhao , Fan Pan , Zhao Cao , Ji-Rong Wen

Recommender systems have been extensively used by the entertainment industry, business marketing and the biomedical industry. In addition to its capacity of providing preference-based recommendations as an unsupervised learning methodology,…

Methodology · Statistics 2020-03-13 Yanqing Zhang , Xuan Bi , Niansheng Tang , Annie Qu

Collaborative filtering (CF) aims to predict users' ratings on items according to historical user-item preference data. In many real-world applications, preference data are usually sparse, which would make models overfit and fail to give…

Machine Learning · Computer Science 2012-10-29 Zhongqi Lu , Erheng Zhong , Lili Zhao , Wei Xiang , Weike Pan , Qiang Yang

With the ever-growing volume of online information, recommender systems have been an effective strategy to overcome such information overload. The utility of recommender systems cannot be overstated, given its widespread adoption in many…

Information Retrieval · Computer Science 2019-07-11 Shuai Zhang , Lina Yao , Aixin Sun , Yi Tay

Cross-domain sequential recommendation is the task of predict the next item that the user is most likely to interact with based on past sequential behavior from multiple domains. One of the key challenges in cross-domain sequential…

Information Retrieval · Computer Science 2020-12-08 Muyang Ma , Pengjie Ren , Zhumin Chen , Zhaochun Ren , Lifan Zhao , Jun Ma , Maarten de Rijke

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

Recommender systems have become an essential tool to help resolve the information overload problem in recent decades. Traditional recommender systems, however, suffer from data sparsity and cold start problems. To address these issues, a…

Information Retrieval · Computer Science 2020-07-21 Zhu Sun , Qing Guo , Jie Yang , Hui Fang , Guibing Guo , Jie Zhang , Robin Burke

Prerequisites can play a crucial role in users' decision-making yet recommendation systems have not fully utilized such contextual background knowledge. Traditional recommendation systems (RS) mostly enrich user-item interactions where the…

Information Retrieval · Computer Science 2022-09-26 Hengchang Hu , Liangming Pan , Yiding Ran , Min-Yen Kan

Music recommender systems (MRS) have experienced a boom in recent years, thanks to the emergence and success of online streaming services, which nowadays make available almost all music in the world at the user's fingertip. While today's…

Information Retrieval · Computer Science 2018-04-11 Markus Schedl , Hamed Zamani , Ching-Wei Chen , Yashar Deldjoo , Mehdi Elahi