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Federated Graph Learning (FGL) enables multiple clients to jointly train powerful graph learning models, e.g., Graph Neural Networks (GNNs), without sharing their local graph data for graph-related downstream tasks, such as graph property…

Machine Learning · Computer Science 2025-02-24 Xingbo Fu , Zihan Chen , Yinhan He , Song Wang , Binchi Zhang , Chen Chen , Jundong Li

Federated Learning (FL) deals with learning a central model (i.e. the server) in privacy-constrained scenarios, where data are stored on multiple devices (i.e. the clients). The central model has no direct access to the data, but only to…

Machine Learning · Computer Science 2021-05-03 Debora Caldarola , Massimiliano Mancini , Fabio Galasso , Marco Ciccone , Emanuele Rodolà , Barbara Caputo

Federated Graph Learning (FGL) is a distributed machine learning paradigm based on graph neural networks, enabling secure and collaborative modeling of local graph data among clients. However, label noise can degrade the global model's…

Machine Learning · Computer Science 2024-12-02 De Li , Haodong Qian , Qiyu Li , Zhou Tan , Zemin Gan , Jinyan Wang , Xianxian Li

Federated graph learning (FGL) enables collaborative training of graph neural networks (GNNs) across decentralized subgraphs without exposing raw data. While existing FGL methods often achieve high overall accuracy, we show that this…

Machine Learning · Computer Science 2026-01-26 Zekai Chen , Kairui Yang , Xunkai Li , Henan Sun , Zhihan Zhang , Jia Li , Qiangqiang Dai , Rong-Hua Li , Guoren Wang

In medical image segmentation tasks, Domain Generalization (DG) under the Federated Learning (FL) framework is crucial for addressing challenges related to privacy protection and data heterogeneity. However, traditional federated learning…

Computer Vision and Pattern Recognition · Computer Science 2025-10-22 Yucheng Song , Chenxi Li , Haokang Ding , Zhining Liao , Zhifang Liao

Federated low-rank adaptation (FedLoRA) has facilitated communication-efficient and privacy-preserving fine-tuning of foundation models for downstream tasks. In practical federated learning scenarios, client heterogeneity in system…

Machine Learning · Computer Science 2026-05-12 Fei Wu , Jia Hu , Geyong Min , Shiqiang Wang

Federated Graph Learning (FGL) combines the privacy-preserving capabilities of federated learning (FL) with the strong graph modeling capability of Graph Neural Networks (GNNs). Current research addresses subgraph-FL from the structural…

Machine Learning · Computer Science 2025-08-19 Zihan Tan , Suyuan Huang , Guancheng Wan , Wenke Huang , He Li , Mang Ye

Graph data are ubiquitous in the real world. Graph learning (GL) tries to mine and analyze graph data so that valuable information can be discovered. Existing GL methods are designed for centralized scenarios. However, in practical…

Machine Learning · Computer Science 2021-05-10 Chuan Chen , Weibo Hu , Ziyue Xu , Zibin Zheng

Federated Graph Learning (FGL) aims to collaboratively and privately optimize graph models on divergent data for different tasks. A critical challenge in FGL is to enable effective yet efficient federated optimization against multifaceted…

Machine Learning · Computer Science 2024-11-05 Zhuoning Guo , Ruiqian Han , Hao Liu

We address the problem of federated domain generalization in an unsupervised setting for the first time. We first theoretically establish a connection between domain shift and alignment of gradients in unsupervised federated learning and…

Machine Learning · Computer Science 2025-01-06 Farhad Pourpanah , Mahdiyar Molahasani , Milad Soltany , Michael Greenspan , Ali Etemad

Decentralized Federated Learning (DFL) has emerged as a robust distributed paradigm that circumvents the single-point-of-failure and communication bottleneck risks of centralized architectures. However, a significant challenge arises as…

Machine Learning · Computer Science 2025-08-18 Lianshuai Guo , Zhongzheng Yuan , Xunkai Li , Yinlin Zhu , Meixia Qu , Wenyu Wang

Federated learning is a distributed machine learning approach which enables a shared server model to learn by aggregating the locally-computed parameter updates with the training data from spatially-distributed client silos. Though…

Machine Learning · Computer Science 2022-05-20 Mike He Zhu , Léna Néhale Ezzine , Dianbo Liu , Yoshua Bengio

Graph neural networks (GNNs) have shown their superiority in modeling graph data. Owing to the advantages of federated learning, federated graph learning (FGL) enables clients to train strong GNN models in a distributed manner without…

Machine Learning · Computer Science 2022-11-24 Yue Tan , Yixin Liu , Guodong Long , Jing Jiang , Qinghua Lu , Chengqi Zhang

Recent advances in graph machine learning have shifted to data-centric paradigms, driven by two emerging fields: (1) Federated graph learning (FGL) enables multi-client collaboration but faces challenges from data and task heterogeneity,…

Machine Learning · Computer Science 2025-11-17 Yinlin Zhu , Xunkai Li , Jishuo Jia , Miao Hu , Di Wu , Meikang Qiu

Federated domain generalization aims to train a global model from multiple source domains and ensure its generalization ability to unseen target domains. Due to the target domain being with unknown domain shifts, attempting to approximate…

Computer Vision and Pattern Recognition · Computer Science 2025-01-28 Haoxuan Che , Yifei Wu , Haibo Jin , Yong Xia , Hao Chen

Federated Graph Learning (FGL) is an emerging technology that enables clients to collaboratively train powerful Graph Neural Networks (GNNs) in a distributed manner without exposing their private data. Nevertheless, FGL still faces the…

Machine Learning · Computer Science 2024-08-22 Longwen Wang , Jianchun Liu , Zhi Liu , Jinyang Huang

Federated graph representation learning (FedGRL) brings the benefits of distributed training to graph structured data while simultaneously addressing some privacy and compliance concerns related to data curation. However, several…

Machine Learning · Computer Science 2022-10-28 Susheel Suresh , Danny Godbout , Arko Mukherjee , Mayank Shrivastava , Jennifer Neville , Pan Li

Graph Federated Learning (GFL) enables collaborative representation learning across distributed subgraphs while preserving privacy. However, heterogeneity remains a critical challenge, as subgraphs across clients typically differ…

Machine Learning · Computer Science 2026-05-08 Wentao Yu , Bo Han , Jie Yang , Chen Gong

Federated Learning (FL) can be coordinated under the orchestration of a central server to collaboratively build a privacy-preserving model without the need for data exchange. However, participant data heterogeneity leads to local optima…

Machine Learning · Computer Science 2024-08-30 Boyuan Li , Zihao Peng , Yafei Li , Mingliang Xu , Shengbo Chen , Baofeng Ji , Cong Shen

Heterogeneous graph neural networks (HGNNs) can learn from typed and relational graph data more effectively than conventional GNNs. With larger parameter spaces, HGNNs may require more training data, which is often scarce in real-world…

Machine Learning · Computer Science 2023-05-18 Xinyu Fu , Irwin King