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Federated recommendation systems employ federated learning techniques to safeguard user privacy by transmitting model parameters instead of raw user data between user devices and the central server. Nevertheless, the current federated…

Information Retrieval · Computer Science 2023-05-12 Sichun Luo , Yuanzhang Xiao , Xinyi Zhang , Yang Liu , Wenbo Ding , Linqi Song

Sequential recommender systems have made significant progress. Recently, due to increasing concerns about user data privacy, some researchers have implemented federated learning for sequential recommendation, a.k.a., Federated Sequential…

Information Retrieval · Computer Science 2024-06-11 Wei Yuan , Chaoqun Yang , Liang Qu , Quoc Viet Hung Nguyen , Guanhua Ye , Hongzhi Yin

Many datasets include a small set of variables, such as biomarkers or clinical outcomes, whose relationships to the broader system are of primary scientific interest. Estimating the full network of inter-variable relationships in such…

Methodology · Statistics 2026-05-14 Omar Melikechi , David B. Dunson , Noureddine Melikechi , Jeffrey W. Miller

Personalized federated learning has received an upsurge of attention due to the mediocre performance of conventional federated learning (FL) over heterogeneous data. Unlike conventional FL which trains a single global consensus model,…

Machine Learning · Computer Science 2023-09-08 Jun Luo , Matias Mendieta , Chen Chen , Shandong Wu

In contrast to training traditional machine learning (ML) models in data centers, federated learning (FL) trains ML models over local datasets contained on resource-constrained heterogeneous edge devices. Existing FL algorithms aim to learn…

Machine Learning · Computer Science 2022-09-13 El Houcine Bergou , Konstantin Burlachenko , Aritra Dutta , Peter Richtárik

Medical image segmentation is clinically important, yet data privacy and the cost of expert annotation limit the availability of labeled data. Federated semi-supervised learning (FSSL) offers a solution but faces two challenges:…

Computer Vision and Pattern Recognition · Computer Science 2025-11-19 Sahar Nasirihaghighi , Negin Ghamsarian , Yiping Li , Marcel Breeuwer , Raphael Sznitman , Klaus Schoeffmann

In this paper, we propose a method for privacy-preserving federated learning that uses randomly selected model parameters to update global models. High-quality deep neural networks (DNN) models require a huge amount of training data in…

Cryptography and Security · Computer Science 2026-05-05 Hiroto Sawada , Shoko Imaizumi , Hitoshi Kiya

Personalized federated learning (PFL) aims to harness the collective wisdom of clients' data while building personalized models tailored to individual clients' data distributions. Existing works offer personalization primarily to clients…

Computer Vision and Pattern Recognition · Computer Science 2023-11-01 Hong-You Chen , Jike Zhong , Mingda Zhang , Xuhui Jia , Hang Qi , Boqing Gong , Wei-Lun Chao , Li Zhang

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

Graph neural network (GNN)-based federated recommendation systems effectively capture user-item relationships while preserving data privacy. However, existing methods often face slow convergence on graph data and privacy leakage risks…

Information Retrieval · Computer Science 2026-03-27 Zhenxing Yan , Jidong Yuan , Yongqi Sun , Haiyang Liu , Zhihui Gao

Subgraphs of a larger global graph may be distributed across multiple devices, and only locally accessible due to privacy restrictions, although there may be links between subgraphs. Recently proposed subgraph Federated Learning (FL)…

Machine Learning · Computer Science 2023-05-23 Jinheon Baek , Wonyong Jeong , Jiongdao Jin , Jaehong Yoon , Sung Ju Hwang

Federated Learning (FL) enables decentralised model training across distributed clients without requiring data centralisation. However, the generalisation performance of the global model is usually degraded by data heterogeneity across…

Machine Learning · Computer Science 2026-05-11 Ozgu Goksu , Nicolas Pugeault

Low-dose CT (LDCT) reduces radiation exposure but introduces protocol-dependent noise and artifacts that vary across institutions. While federated learning enables collaborative training without centralizing patient data, existing methods…

Image and Video Processing · Electrical Eng. & Systems 2026-03-17 Anas Zafar , Muhammad Waqas , Amgad Muneer , Rukhmini Bandyopadhyay , Jia Wu

Federated recommendation systems (FedRecs) have gained significant attention for providing privacy-preserving recommendation services. However, existing FedRecs assume that all users have the same requirements for privacy protection, i.e.,…

Machine Learning · Computer Science 2025-08-11 Ce Na , Kai Yang , Dengzhao Fang , Yu Li , Jingtong Gao , Chengcheng Zhu , Jiale Zhang , Xiaobing Sun , Yi Chang

Federated Learning (FL) is a widely used framework for training models in a decentralized manner, ensuring that the central server does not have direct access to data from local clients. However, this approach may still fail to fully…

Machine Learning · Computer Science 2025-03-12 Sangwoo Park , Seanie Lee , Byungjoo Kim , Sung Ju Hwang

Federated semi-supervised learning (FSSL) aims to derive a global model by training fully-labeled and fully-unlabeled clients or training partially labeled clients. The existing approaches work well when local clients have independent and…

Computer Vision and Pattern Recognition · Computer Science 2022-03-29 Xiaoxiao Liang , Yiqun Lin , Huazhu Fu , Lei Zhu , Xiaomeng Li

Federated Learning (FL), a privacy-oriented distributed ML paradigm, is being gaining great interest in Internet of Things because of its capability to protect participants data privacy. Studies have been conducted to address challenges…

Cryptography and Security · Computer Science 2023-06-08 Jianhua Wang , Xiaolin Chang , Jelena Mišić , Vojislav B. Mišić , Lin Li , Yingying Yao

Standard federated learning approaches suffer when client data distributions have sufficient heterogeneity. Recent methods addressed the client data heterogeneity issue via personalized federated learning (PFL) - a class of FL algorithms…

Machine Learning · Computer Science 2024-04-04 Rishub Tamirisa , Chulin Xie , Wenxuan Bao , Andy Zhou , Ron Arel , Aviv Shamsian

As data privacy and security attract increasing attention, Federated Recommender System (FRS) offers a solution that strikes a balance between providing high-quality recommendations and preserving user privacy. However, the presence of…

Information Retrieval · Computer Science 2024-11-05 Xinrui He , Shuo Liu , Jackey Keung , Jingrui He

In federated learning (FL), accommodating clients with diverse resource constraints remains a significant challenge. A widely adopted approach is to use a shared full-size model, from which each client extracts a submodel aligned with its…

Machine Learning · Computer Science 2026-04-14 Wenfei Liang , Wee Peng Tay