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Federated Knowledge Graph Embedding (FKGE) has recently garnered considerable interest due to its capacity to extract expressive representations from distributed knowledge graphs, while concurrently safeguarding the privacy of individual…

Information Retrieval · Computer Science 2024-06-19 Xiaoxiong Zhang , Zhiwei Zeng , Xin Zhou , Dusit Niyato , Zhiqi Shen

Federated Recommendation (FR) emerges as a novel paradigm that enables privacy-preserving recommendations. However, traditional FR systems usually represent users/items with discrete identities (IDs), suffering from performance degradation…

Information Retrieval · Computer Science 2024-03-08 Huimin Zeng , Zhenrui Yue , Qian Jiang , Dong Wang

Generating recommendations based on user-item interactions and user-user social relations is a common use case in web-based systems. These connections can be naturally represented as graph-structured data and thus utilizing graph neural…

Information Retrieval · Computer Science 2022-05-23 Jiajia Chen , Xin Xin , Xianfeng Liang , Xiangnan He , Jun Liu

Federated recommender systems enable collaborative model training while keeping user interaction data local and sharing only essential model parameters, thereby mitigating privacy risks. However, existing methods overlook a critical issue,…

Machine Learning · Computer Science 2026-03-13 Fengyuan Yu , Xiaohua Feng , Yuyuan Li , Changwang Zhang , Jun Wang , Chaochao Chen

User-item interactions in recommendations can be naturally de-noted as a user-item bipartite graph. Given the success of graph neural networks (GNNs) in graph representation learning, GNN-based C methods have been proposed to advance…

Information Retrieval · Computer Science 2022-01-06 Yiqi Wang , Chaozhuo Li , Mingzheng Li , Wei Jin , Yuming Liu , Hao Sun , Xing Xie , Jiliang Tang

Sequential recommendation is an advanced recommendation technique that utilizes the sequence of user behaviors to generate personalized suggestions by modeling the temporal dependencies and patterns in user preferences. However, it requires…

Information Retrieval · Computer Science 2025-04-09 Yichen Li , Qiyu Qin , Gaoyang Zhu , Wenchao Xu , Haozhao Wang , Yuhua Li , Rui Zhang , Ruixuan Li

Personalized recommendation increasingly relies on private user data, motivating approaches that can adapt to individuals without centralizing their information. We present Federated Targeted Recommendations with Evolving Knowledge graphs…

Machine Learning · Computer Science 2026-03-17 Fernando Spadea , Oshani Seneviratne

With the recent success of large language models, particularly foundation models with generalization abilities, applying foundation models for recommendations becomes a new paradigm to improve existing recommendation systems. It becomes a…

Information Retrieval · Computer Science 2024-05-09 Chunxu Zhang , Guodong Long , Hongkuan Guo , Xiao Fang , Yang Song , Zhaojie Liu , Guorui Zhou , Zijian Zhang , Yang Liu , Bo Yang

Federated recommendations leverage the federated learning (FL) techniques to make privacy-preserving recommendations. Though recent success in the federated recommender system, several vital challenges remain to be addressed: (i) The…

Information Retrieval · Computer Science 2022-08-25 Sichun Luo , Yuanzhang Xiao , Yang Liu , Congduan Li , Linqi Song

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 the realm of personalized recommender systems, the challenge of adapting to evolving user preferences and the continuous influx of new users and items is paramount. Conventional models, typically reliant on a static training-test…

Information Retrieval · Computer Science 2024-07-12 Peiyan Zhang , Yuchen Yan , Xi Zhang , Liying Kang , Chaozhuo Li , Feiran Huang , Senzhang Wang , Sunghun Kim

Owing to the nature of privacy protection, federated recommender systems (FedRecs) have garnered increasing interest in the realm of on-device recommender systems. However, most existing FedRecs only allow participating clients to…

Information Retrieval · Computer Science 2023-12-06 Wei Yuan , Liang Qu , Lizhen Cui , Yongxin Tong , Xiaofang Zhou , Hongzhi Yin

Centralized recommender systems encounter privacy leakage due to the need to collect user behavior and other private data. Hence, federated recommender systems (FedRec) have become a promising approach with an aggregated global model on the…

Information Retrieval · Computer Science 2025-08-28 Jiakui Shen , Yunqi Mi , Guoshuai Zhao , Jialie Shen , Xueming Qian

Large Language Models (LLMs) have empowered generative recommendation systems through fine-tuning user behavior data. However, utilizing the user data may pose significant privacy risks, potentially leading to ethical dilemmas and…

Information Retrieval · Computer Science 2025-02-25 Jujia Zhao , Wenjie Wang , Chen Xu , See-Kiong Ng , Tat-Seng Chua

In the mobile Internet era, the recommender system has become an irreplaceable tool to help users discover useful items, and thus alleviating the information overload problem. Recent deep neural network (DNN)-based recommender system…

Information Retrieval · Computer Science 2021-09-14 Qinyong Wang , Hongzhi Yin , Tong Chen , Junliang Yu , Alexander Zhou , Xiangliang Zhang

The marriage of federated learning and recommender system (FedRec) has been widely used to address the growing data privacy concerns in personalized recommendation services. In FedRecs, users' attribute information and behavior data (i.e.,…

Information Retrieval · Computer Science 2023-01-31 Wei Yuan , Chaoqun Yang , Quoc Viet Hung Nguyen , Lizhen Cui , Tieke He , Hongzhi Yin

Recommender systems have become ubiquitous in the past years. They solve the tyranny of choice problem faced by many users, and are utilized by many online businesses to drive engagement and sales. Besides other criticisms, like creating…

Information Retrieval · Computer Science 2024-05-17 David Neumann , Andreas Lutz , Karsten Müller , Wojciech Samek

Item-to-Item (I2I) recommendation is an important function in most recommendation systems, which generates replacement or complement suggestions for a particular item based on its semantic similarities to other cataloged items. Given that…

Information Retrieval · Computer Science 2023-06-07 Ziwei Fan , Hao Ding , Anoop Deoras , Trong Nghia Hoang

Learning vector representations (aka. embeddings) of users and items lies at the core of modern recommender systems. Ranging from early matrix factorization to recently emerged deep learning based methods, existing efforts typically obtain…

Information Retrieval · Computer Science 2020-07-06 Xiang Wang , Xiangnan He , Meng Wang , Fuli Feng , Tat-Seng Chua

In the past decade, with the development of big data technology, an increasing amount of patient information has been stored as electronic health records (EHRs). Leveraging these data, various doctor recommendation systems have been…

Information Retrieval · Computer Science 2022-07-14 Luning Bi , Yunlong Wang , Fan Zhang , Zhuqing Liu , Yong Cai , Emily Zhao