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Graph-structured data is prevalent in many applications. In subgraph federated learning (FL), this data is distributed across clients, each with a local subgraph. Personalized subgraph FL aims to develop a customized model for each client…

Machine Learning · Computer Science 2025-08-20 Wenfei Liang , Yanan Zhao , Rui She , Yiming Li , Wee Peng Tay

Autonomous vehicles (AVs) must interact with a diverse set of human drivers in heterogeneous geographic areas. Ideally, fleets of AVs should share trajectory data to continually re-train and improve trajectory forecasting models from…

Machine Learning · Computer Science 2021-12-03 Manabu Nakanoya , Junha Im , Hang Qiu , Sachin Katti , Marco Pavone , Sandeep Chinchali

Recommender systems are widely used in industry to improve user experience. Despite great success, they have recently been criticized for collecting private user data. Federated Learning (FL) is a new paradigm for learning on distributed…

Machine Learning · Computer Science 2022-10-26 Junyi Li , Heng Huang

To defend against privacy leakage of user data, differential privacy is widely used in federated learning, but it is not free. The addition of noise randomly disrupts the semantic integrity of the model and this disturbance accumulates with…

Machine Learning · Computer Science 2025-05-06 Yuecheng Li , Lele Fu , Tong Wang , Jian Lou , Bin Chen , Lei Yang , Jian Shen , Zibin Zheng , Chuan Chen

Federated recommendation is a new Internet service architecture that aims to provide privacy-preserving recommendation services in federated settings. Existing solutions are used to combine distributed recommendation algorithms and…

Information Retrieval · Computer Science 2023-05-16 Chunxu Zhang , Guodong Long , Tianyi Zhou , Peng Yan , Zijian Zhang , Chengqi Zhang , Bo Yang

Due to the highly sensitive nature of certain data in cross-border sharing, collaborative cross-border recommendations and data sharing are often subject to stringent privacy protection regulations, resulting in insufficient data for model…

Machine Learning · Computer Science 2025-05-27 Zhizhong Tan , Jiexin Zheng , Xingxing Yang , Chi Zhang , Weiping Deng , Wenyong Wang

Collaborative filtering (CF) has been successfully used to provide users with personalized products and services. However, dealing with the increasing sparseness of user-item matrix still remains a challenge. To tackle such issue, hybrid CF…

Information Retrieval · Computer Science 2017-06-14 Shuai Zhang , Lina Yao , Xiwei Xu

Federated Learning (FL) is a distributed machine learning technique that preserves data privacy by sharing only the trained parameters instead of the client data. This makes FL ideal for highly dynamic, heterogeneous, and time-critical…

Machine Learning · Computer Science 2025-10-30 Kasun Eranda Wijethilake , Adnan Mahmood , Quan Z. Sheng

Building recommendation systems via federated learning (FL) is a new emerging challenge for advancing next-generation Internet service and privacy protection. Existing approaches train shared item embedding by FL while keeping the user…

Machine Learning · Computer Science 2024-02-09 Zhiwei Li , Guodong Long , Tianyi Zhou

Personalised federated learning (FL) aims at collaboratively learning a machine learning model taylored for each client. Albeit promising advances have been made in this direction, most of existing approaches works do not allow for…

Machine Learning · Computer Science 2023-01-30 Nikita Kotelevskii , Maxime Vono , Eric Moulines , Alain Durmus

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

Collaborative Filtering (CF) is a pivotal research area in recommender systems that capitalizes on collaborative similarities between users and items to provide personalized recommendations. With the remarkable achievements of node…

Information Retrieval · Computer Science 2024-01-30 Yifang Qin , Wei Ju , Xiao Luo , Yiyang Gu , Zhiping Xiao , Ming Zhang

Federated recommendation aims to collect global knowledge by aggregating local models from massive devices, to provide recommendations while ensuring privacy. Current methods mainly leverage aggregation functions invented by federated…

Cryptography and Security · Computer Science 2024-06-07 Honglei Zhang , Haoxuan Li , Jundong Chen , Sen Cui , Kunda Yan , Abudukelimu Wuerkaixi , Xin Zhou , Zhiqi Shen , Yidong Li

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

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

Federated Learning (FL) is gaining prominence in machine learning as privacy concerns grow. This paradigm allows each client (e.g., an individual online store) to train a recommendation model locally while sharing only model updates,…

Machine Learning · Computer Science 2025-10-09 Jongwon Park , Minku Kang , Wooseok Sim , Soyoung Lee , Hogun Park

Federated learning (FL) has emerged as a powerful approach to safeguard data privacy by training models across distributed edge devices without centralizing local data. Despite advancements in homogeneous data scenarios, maintaining…

Computer Vision and Pattern Recognition · Computer Science 2024-11-26 Yuting Ma , Shengeng Tang , Xiaohua Xu , Lechao Cheng

The emerging paradigm of federated learning strives to enable collaborative training of machine learning models on the network edge without centrally aggregating raw data and hence, improving data privacy. This sharply deviates from…

Machine Learning · Computer Science 2019-12-03 Manoj Ghuhan Arivazhagan , Vinay Aggarwal , Aaditya Kumar Singh , Sunav Choudhary

In today's day and age when almost every industry has an online presence with users interacting in online marketplaces, personalized recommendations have become quite important. Traditionally, the problem of collaborative filtering has been…

Information Retrieval · Computer Science 2018-09-25 Kilol Gupta , Mukund Yelahanka Raghuprasad , Pankhuri Kumar

To address data heterogeneity, the key strategy of Personalized Federated Learning (PFL) is to decouple general knowledge (shared among clients) and client-specific knowledge, as the latter can have a negative impact on collaboration if not…

Machine Learning · Computer Science 2024-10-14 Xinghao Wu , Xuefeng Liu , Jianwei Niu , Haolin Wang , Shaojie Tang , Guogang Zhu , Hao Su