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The multimodal recommendation has gradually become the infrastructure of online media platforms, enabling them to provide personalized service to users through a joint modeling of user historical behaviors (e.g., purchases, clicks) and item…

Information Retrieval · Computer Science 2024-04-19 Zhiqiang Guo , Jianjun Li , Guohui Li , Chaoyang Wang , Si Shi , Bin Ruan

In this work, we study group recommendation in a particular scenario, namely Occasional Group Recommendation (OGR). Most existing works have addressed OGR by aggregating group members' personal preferences to learn the group representation.…

Information Retrieval · Computer Science 2021-05-10 Lei Guo , Hongzhi Yin , Tong Chen , Xiangliang Zhang , Kai Zheng

The core of the general recommender systems lies in learning high-quality embedding representations of users and items to investigate their positional relations in the feature space. Unfortunately, data sparsity caused by…

Information Retrieval · Computer Science 2025-04-24 Yi Zhang , Yiwen Zhang

Recommender systems aim to recommend new items to users by learning user and item representations. In practice, these representations are highly entangled as they consist of information about multiple factors, including user's interests,…

Information Retrieval · Computer Science 2022-04-18 Paras Sheth , Ruocheng Guo , Lu Cheng , Huan Liu , K. Selçuk Candan

Modern society devotes a significant amount of time to digital interaction. Many of our daily actions are carried out through digital means. This has led to the emergence of numerous Artificial Intelligence tools that assist us in various…

Information Retrieval · Computer Science 2023-10-12 Jorge Dueñas-Lerín , Raúl Lara-Cabrera , Fernando Ortega , Jesús Bobadilla

How to extract meaningful information in user historical behavior plays a crucial role in recommendation. User behavior sequence often contains multiple conceptually distinct items that belong to different item groups and the number of the…

Information Retrieval · Computer Science 2022-01-14 Weiqi Shao , Xu Chen , Jiashu Zhao , Long Xia , Dawei Yin

Multi-interest recommendation has gained attention, especially in industrial retrieval stage. Unlike classical dual-tower methods, it generates multiple user representations instead of a single one to model comprehensive user interests.…

Information Retrieval · Computer Science 2025-10-17 Zhibo Wu , Yunfan Wu , Quan Liu , Lin Jiang , Ping Yang , Yao Hu

Group recommendation over social media streams has attracted significant attention due to its wide applications in domains such as e-commerce, entertainment, and online news broadcasting. By leveraging social connections and group…

Information Retrieval · Computer Science 2025-07-03 Chengkun He , Xiangmin Zhou , Chen Wang , Longbing Cao , Jie Shao , Xiaodong Li , Guang Xu , Carrie Jinqiu Hu , Zahir Tari

Recommending suitable items to a group of users, commonly referred to as the group recommendation task, is becoming increasingly urgent with the development of group activities. The challenges within the group recommendation task involve…

Information Retrieval · Computer Science 2023-11-21 Juntao Zhang , Sheng Wang , Zhiyu Chen , Xiandi Yang , Zhiyong Peng

As a step beyond traditional personalized recommendation, group recommendation is the task of suggesting items that can satisfy a group of users. In group recommendation, the core is to design preference aggregation functions to obtain a…

Information Retrieval · Computer Science 2022-12-06 Tong Chen , Hongzhi Yin , Jing Long , Quoc Viet Hung Nguyen , Yang Wang , Meng Wang

Accuracy and diversity have long been considered to be two conflicting goals for recommendations. We point out, however, that as the diversity is typically measured by certain pre-selected item attributes, e.g., category as the most…

Information Retrieval · Computer Science 2023-01-16 Xiaoying Zhang , Hongning Wang , Hang Li

Modeling user interests is crucial in real-world recommender systems. In this paper, we present a new user interest representation model for personalized recommendation. Specifically, the key novelty behind our model is that it explicitly…

Information Retrieval · Computer Science 2020-11-12 Shuai Zhang , Huoyu Liu , Aston Zhang , Yue Hu , Ce Zhang , Yumeng Li , Tanchao Zhu , Shaojian He , Wenwu Ou

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

Social recommender systems have drawn a lot of attention in many online web services, because of the incorporation of social information between users in improving recommendation results. Despite the significant progress made by existing…

Information Retrieval · Computer Science 2023-03-15 Lianghao Xia , Yizhen Shao , Chao Huang , Yong Xu , Huance Xu , Jian Pei

Group Recommendation (GR), which aims to recommend items to groups of users, has become a promising and practical direction for recommendation systems. This paper points out two issues of the state-of-the-art GR models. (1) The pre-defined…

Information Retrieval · Computer Science 2024-11-01 Yue Liu , Shihao Zhu , Tianyuan Yang , Jian Ma , Wenliang Zhong

Despite recommender systems play a key role in network content platforms, mining the user's interests is still a significant challenge. Existing works predict the user interest by utilizing user behaviors, i.e., clicks, views, etc., but…

Information Retrieval · Computer Science 2023-08-15 Xuanji Xiao , Huaqiang Dai , Qian Dong , Shuzi Niu , Yuzhen Liu , Pei Liu

Sequential recommendation has been a widely popular topic of recommender systems. Existing works have contributed to enhancing the prediction ability of sequential recommendation systems based on various methods, such as recurrent networks…

Information Retrieval · Computer Science 2021-11-24 Yunyi Li , Pengpeng Zhao , Guanfeng Liu , Yanchi Liu , Victor S. Sheng , Jiajie Xu , Xiaofang Zhou

In recent years, group buying has become one popular kind of online shopping activity, thanks to its larger sales and lower unit price. Unfortunately, research seldom focuses on recommendations specifically for group buying by now. Although…

Information Retrieval · Computer Science 2022-11-28 Shuoyao Zhai , Baichuan Liu , Deqing Yang , Yanghua Xiao

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

Social recommendation is effective in improving the recommendation performance by leveraging social relations from online social networking platforms. Social relations among users provide friends' information for modeling users' interest in…

Information Retrieval · Computer Science 2021-03-17 Bairan Fu , Wenming Zhang , Guangneng Hu , Xinyu Dai , Shujian Huang , Jiajun Chen