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Federated Learning provides a privacy-preserving paradigm for distributed learning, but suffers from statistical heterogeneity across clients. Personalized Federated Learning (PFL) mitigates this issue by considering client-specific models.…

Machine Learning · Statistics 2026-02-17 Ala Emrani , Amir Najafi , Abolfazl Motahari

As a new distributed graph learning paradigm, Federated Graph Learning (FGL) facilitates collaborative model training across local systems while preserving data privacy. We review existing FGL approaches and categorize their optimization…

Machine Learning · Computer Science 2025-08-15 Zekai Chen , Xunkai Li , Yinlin Zhu , Rong-Hua Li , Guoren Wang

Traditional Federated Learning (FL) methods typically train a single global model collaboratively without exchanging raw data. In contrast, Personalized Federated Learning (PFL) techniques aim to create multiple models that are better…

Machine Learning · Computer Science 2024-04-23 Emilio Cantu-Cervini

Federated Graph Learning (FGL) has emerged as a promising paradigm for breaking data silos among distributed private graphs. In practical scenarios involving heterogeneous distributed graph data, personalized Federated Graph Learning (pFGL)…

Machine Learning · Computer Science 2025-08-07 Guochen Yan , Xunkai Li , Luyuan Xie , Qingni Shen , Yuejian Fang , Zhonghai Wu

Federated training methods have gained popularity for graph learning with applications including friendship graphs of social media sites and customer-merchant interaction graphs of huge online marketplaces. However, privacy regulations…

Machine Learning · Computer Science 2024-12-23 Siddharth Ambekar , Yuhang Yao , Ryan Li , Carlee Joe-Wong

Resting-state functional magnetic resonance imaging (rs-fMRI) offers a non-invasive approach to examining abnormal brain connectivity associated with brain disorders. Graph neural network (GNN) gains popularity in fMRI representation…

Quantitative Methods · Quantitative Biology 2023-08-22 Junhao Zhang , Qianqian Wang , Xiaochuan Wang , Lishan Qiao , Mingxia Liu

Federated Graph Learning (FGL) is tasked with training machine learning models, such as Graph Neural Networks (GNNs), for multiple clients, each with its own graph data. Existing methods usually assume that each client has both node…

Machine Learning · Computer Science 2024-11-14 Xingbo Fu , Song Wang , Yushun Dong , Binchi Zhang , Chen Chen , Jundong Li

Federated learning faces huge challenges from model overfitting due to the lack of data and statistical diversity among clients. To address these challenges, this paper proposes a novel personalized federated learning method via Bayesian…

Machine Learning · Computer Science 2022-06-17 Xu Zhang , Yinchuan Li , Wenpeng Li , Kaiyang Guo , Yunfeng Shao

Recommendation systems aim to provide personalized predictions by identifying items that are most appealing to individual users. Among various recommendation approaches, k-nearest-neighbor (kNN)-based collaborative filtering (CF) remains…

Information Retrieval · Computer Science 2025-12-16 Yongyu Wang

In the era of increasing privacy concerns and demand for personalized experiences, traditional Reinforcement Learning with Human Feedback (RLHF) frameworks face significant challenges due to their reliance on centralized data. We introduce…

Machine Learning · Computer Science 2025-02-11 Flint Xiaofeng Fan , Cheston Tan , Yew-Soon Ong , Roger Wattenhofer , Wei-Tsang Ooi

Federated foundation models represent a new paradigm to jointly fine-tune pre-trained foundation models across clients. It is still a challenge to fine-tune foundation models for a small group of new users or specialized scenarios, which…

Machine Learning · Computer Science 2025-09-17 Yiyuan Yang , Guodong Long , Qinghua Lu , Liming Zhu , Jing Jiang

Conversational Recommender Systems (CRSs) have become increasingly popular as a powerful tool for providing personalized recommendation experiences. By directly engaging with users in a conversational manner to learn their current and…

Information Retrieval · Computer Science 2025-03-04 Allen Lin , Jianling Wang , Ziwei Zhu , James Caverlee

Personalized Federated Learning (PerFL) is a new machine learning paradigm that delivers personalized models for diverse clients under federated learning settings. Most PerFL methods require extra learning processes on a client to adapt a…

Machine Learning · Computer Science 2024-03-29 Peng Yan , Guodong Long

Collaborative filtering on user-item interaction graphs has achieved success in the industrial recommendation. However, recommending users' truly fascinated items poses a seesaw dilemma for collaborative filtering models learned from the…

Information Retrieval · Computer Science 2024-08-06 Weijun Chen , Yuanchen Bei , Qijie Shen , Hao Chen , Xiao Huang , Feiran Huang

With the rapid development of online multimedia services, especially in e-commerce platforms, there is a pressing need for personalised recommendation systems that can effectively encode the diverse multi-modal content associated with each…

Artificial Intelligence · Computer Science 2024-07-30 Zixuan Yi , Iadh Ounis

A distinguishing characteristic of federated learning is that the (local) client data could have statistical heterogeneity. This heterogeneity has motivated the design of personalized learning, where individual (personalized) models are…

Machine Learning · Computer Science 2022-07-06 Kaan Ozkara , Antonious M. Girgis , Deepesh Data , Suhas Diggavi

In general, recommendation can be viewed as a matching problem, i.e., match proper items for proper users. However, due to the huge semantic gap between users and items, it's almost impossible to directly match users and items in their…

Machine Learning · Computer Science 2019-01-16 Zhi-Hong Deng , Ling Huang , Chang-Dong Wang , Jian-Huang Lai , Philip S. Yu

Federated learning (FL) emerges as a decentralized learning framework which trains models from multiple distributed clients without sharing their data to preserve privacy. Recently, large-scale pre-trained models (e.g., Vision Transformer)…

Computer Vision and Pattern Recognition · Computer Science 2023-08-30 Fu-En Yang , Chien-Yi Wang , Yu-Chiang Frank Wang

Personalized federated learning is tasked with training machine learning models for multiple clients, each with its own data distribution. The goal is to train personalized models in a collaborative way while accounting for data disparities…

Machine Learning · Computer Science 2021-03-09 Aviv Shamsian , Aviv Navon , Ethan Fetaya , Gal Chechik

Federated learning is a distributed machine learning approach where multiple clients collaboratively train a model without sharing their local data, which contributes to preserving privacy. A challenge in federated learning is managing…

Machine Learning · Computer Science 2025-03-04 Rickard Brännvall