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Federated learning (FL) enables collaborative training of a global model in the centralized server with data from multiple parties while preserving privacy. However, data heterogeneity can significantly degrade the performance of the global…

Machine Learning · Computer Science 2025-11-11 Yong Zhang , Feng Liang , Guanghu Yuan , Min Yang , Chengming Li , Xiping Hu

Heterogeneous federated learning (HFL) aims to ensure effective and privacy-preserving collaboration among different entities. As newly joined clients require significant adjustments and additional training to align with the existing…

Machine Learning · Computer Science 2026-01-29 Kaile Wang , Jiannong Cao , Yu Yang , Xiaoyin Li , Mingjin Zhang

Self-supervised learning of graph neural networks (GNNs) aims to learn an accurate representation of the graphs in an unsupervised manner, to obtain transferable representations of them for diverse downstream tasks. Predictive learning and…

Machine Learning · Computer Science 2022-10-11 Dongki Kim , Jinheon Baek , Sung Ju Hwang

Personal interaction data can be effectively modeled as individual graphs for each user in recommender systems.Graph Neural Networks (GNNs)-based recommendation techniques have become extremely popular since they can capture high-order…

Machine Learning · Computer Science 2024-12-31 Haiyan Wang , Ye Yuan

Federated Learning (FL) holds great potential for diverse applications owing to its privacy-preserving nature. However, its convergence is often challenged by non-IID data distributions, limiting its effectiveness in real-world deployments.…

Machine Learning · Computer Science 2025-04-22 Kun Zhai , Yifeng Gao , Difan Zou , Guangnan Ye , Siheng Chen , Xingjun Ma , Yu-Gang Jiang

Classic Machine Learning techniques require training on data available in a single data lake. However, aggregating data from different owners is not always convenient for different reasons, including security, privacy and secrecy. Data…

Machine Learning · Computer Science 2023-04-03 Bruno Casella , Roberto Esposito , Carlo Cavazzoni , Marco Aldinucci

Federated Learning (FL) aggregates locally trained models from individual clients to construct a global model. While FL enables learning a model with data privacy, it often suffers from significant performance degradation when clients have…

Machine Learning · Computer Science 2024-03-29 Gihun Lee , Minchan Jeong , Sangmook Kim , Jaehoon Oh , Se-Young Yun

Federated learning (FL) is a rapidly growing privacy-preserving collaborative machine learning paradigm. In practical FL applications, local data from each data silo reflect local usage patterns. Therefore, there exists heterogeneity of…

Machine Learning · Computer Science 2022-02-01 Shenglai Zeng , Zonghang Li , Hongfang Yu , Yihong He , Zenglin Xu , Dusit Niyato , Han Yu

Personalized federated learning, as a variant of federated learning, trains customized models for clients using their heterogeneously distributed data. However, it is still inconclusive about how to design personalized models with better…

Machine Learning · Computer Science 2023-02-23 Tiansheng Huang , Li Shen , Yan Sun , Weiwei Lin , Dacheng Tao

Graph Neural Networks (GNNs) often struggle with heterophilic data, where connected nodes may have dissimilar labels, as they typically assume homophily and rely on local message passing. To address this, we propose creating alternative…

Machine Learning · Computer Science 2025-06-11 Victor M. Tenorio , Madeline Navarro , Samuel Rey , Santiago Segarra , Antonio G. Marques

Federated Learning (FL) is an established paradigm for training deep learning models on decentralized data. However, as the size of the models grows, conventional FL approaches often require significant computational resources on client…

Computer Vision and Pattern Recognition · Computer Science 2025-11-26 Matteo Caligiuri , Francesco Barbato , Donald Shenaj , Umberto Michieli , Pietro Zanuttigh

Federated learning (FL) enables collaborative machine learning across distributed data owners, but data heterogeneity poses a challenge for model calibration. While prior work focused on improving accuracy for non-iid data, calibration…

Machine Learning · Computer Science 2024-06-05 Hongyi Peng , Han Yu , Xiaoli Tang , Xiaoxiao Li

Federated Multi-Label Learning is a distributed paradigm where multiple clients possess heterogeneous multi-label data and perform collaborative learning under privacy constraints without sharing raw data. However, modeling label…

Machine Learning · Computer Science 2026-05-01 Zhiqiang Kou , Junxiang Wu , Wenke Huang , Wenwen He , Ming-Kun Xie , Changwei Wang , Yuheng Jia , Di Jiang , Yang Liu , Xin Geng , Qiang Yang

Federated learning (FL) is a privacy-preserving distributed learning paradigm that enables clients to jointly train a global model. In real-world FL implementations, client data could have label noise, and different clients could have…

Machine Learning · Computer Science 2022-04-12 Jingyi Xu , Zihan Chen , Tony Q. S. Quek , Kai Fong Ernest Chong

Federated learning (FL) aims to collaboratively train a shared model across multiple clients without transmitting their local data. Data heterogeneity is a critical challenge in realistic FL settings, as it causes significant performance…

Machine Learning · Computer Science 2023-11-15 Yuwei Wang , Runhan Li , Hao Tan , Xuefeng Jiang , Sheng Sun , Min Liu , Bo Gao , Zhiyuan Wu

Graph Convolutional Neural Networks (GCNNs) are generalizations of CNNs to graph-structured data, in which convolution is guided by the graph topology. In many cases where graphs are unavailable, existing methods manually construct graphs…

Machine Learning · Computer Science 2019-09-17 Xiang Gao , Wei Hu , Zongming Guo

Graph Neural Networks (GNNs) are characterized by their capacity of processing graph-structured data. However, due to the sparsity of labels under semi-supervised learning, they have been found to exhibit biased performance on specific…

Machine Learning · Computer Science 2025-12-16 Yihan Zhang

Graph classification aims to extract accurate information from graph-structured data for classification and is becoming more and more important in graph learning community. Although Graph Neural Networks (GNNs) have been successfully…

Machine Learning · Computer Science 2020-06-24 Ning Ma , Jiajun Bu , Jieyu Yang , Zhen Zhang , Chengwei Yao , Zhi Yu , Sheng Zhou , Xifeng Yan

Graph neural networks (GNNs) have been used to tackle the few-shot learning (FSL) problem and shown great potentials under the transductive setting. However under the inductive setting, existing GNN based methods are less competitive. This…

Computer Vision and Pattern Recognition · Computer Science 2021-12-14 Tianyuan Yu , Sen He , Yi-Zhe Song , Tao Xiang

Federated Learning (FL) has emerged as a crucial distributed training paradigm, enabling discrete devices to collaboratively train a shared model under the coordination of a central server, while leveraging their locally stored private…

Machine Learning · Computer Science 2024-09-02 Wenhao Yuan , Xuehe Wang