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Federated Learning (FL) is a prominent framework that enables training a centralized model while securing user privacy by fusing local, decentralized models. In this setting, one major obstacle is data heterogeneity, i.e., each client…

Machine Learning · Computer Science 2022-06-22 Artur Back de Luca , Guojun Zhang , Xi Chen , Yaoliang Yu

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

With the advancement of edge computing, federated learning (FL) displays a bright promise as a privacy-preserving collaborative learning paradigm. However, one major challenge for FL is the data heterogeneity issue, which refers to the…

Machine Learning · Computer Science 2025-05-27 Huan Wang , Haoran Li , Huaming Chen , Jun Yan , Lijuan Wang , Jiahua Shi , Shiping Chen , Jun Shen

Unsupervised Contrastive learning has gained prominence in fields such as vision, and biology, leveraging predefined positive/negative samples for representation learning. Data augmentation, categorized into hand-designed and model-based…

Machine Learning · Computer Science 2024-05-28 Zelin Zang , Hao Luo , Kai Wang , Panpan Zhang , Fan Wang , Stan. Z Li , Yang You

Federated Learning (FL) enables collaborative model training among participants while guaranteeing the privacy of raw data. Mainstream FL methodologies overlook the dynamic nature of real-world data, particularly its tendency to grow in…

Machine Learning · Computer Science 2024-04-18 Zhiyuan Wu , Tianliu He , Sheng Sun , Yuwei Wang , Min Liu , Bo Gao , Xuefeng Jiang

Federated learning is an important privacy-preserving multi-party learning paradigm, involving collaborative learning with others and local updating on private data. Model heterogeneity and catastrophic forgetting are two crucial…

Machine Learning · Computer Science 2023-09-29 Wenke Huang , Mang Ye , Zekun Shi , Bo Du

Federated domain generalization aims to learn a generalizable model from multiple decentralized source domains for deploying on the unseen target domain. The style augmentation methods have achieved great progress on domain generalization.…

Computer Vision and Pattern Recognition · Computer Science 2025-06-05 Yikang Wei

Collaborative fairness is a crucial challenge in federated learning. However, existing approaches often overlook a practical yet complex form of heterogeneity: imbalanced covariate shift. We provide a theoretical analysis of this setting,…

Machine Learning · Computer Science 2025-07-14 Tianrun Yu , Jiaqi Wang , Haoyu Wang , Mingquan Lin , Han Liu , Nelson S. Yee , Fenglong Ma

The proliferation of edge devices has brought Federated Learning (FL) to the forefront as a promising paradigm for decentralized and collaborative model training while preserving the privacy of clients' data. However, FL struggles with a…

Machine Learning · Computer Science 2024-05-14 Mahdi Morafah , Matthias Reisser , Bill Lin , Christos Louizos

Federated learning (FL) is an important technique for learning models from decentralized data in a privacy-preserving way. Existing FL methods usually uniformly sample clients for local model learning in each round. However, different…

Machine Learning · Computer Science 2023-06-27 Tao Qi , Fangzhao Wu , Lingjuan Lyu , Yongfeng Huang , Xing Xie

Federated Learning (FL) enables distributed optimization without compromising data sovereignty. Yet, where local label distributions are mutually exclusive, standard weight aggregation fails due to conflicting optimization trajectories.…

Machine Learning · Computer Science 2026-03-18 Andrea Moleri , Christian Internò , Ali Raza , Markus Olhofer , David Klindt , Fabio Stella , Barbara Hammer

Federated learning provides a privacy-preserving manner to collaboratively train models on data distributed over multiple local clients via the coordination of a global server. In this paper, we focus on label distribution skew in federated…

Machine Learning · Computer Science 2024-09-23 Jianghu Lu , Shikun Li , Kexin Bao , Pengju Wang , Zhenxing Qian , Shiming Ge

Federated Learning (FL) is a novel approach that allows for collaborative machine learning while preserving data privacy by leveraging models trained on decentralized devices. However, FL faces challenges due to non-uniformly distributed…

Machine Learning · Computer Science 2024-04-16 Changlin Song , Divya Saxena , Jiannong Cao , Yuqing Zhao

In this paper, we explore a new knowledge-amalgamation problem, termed Federated Selective Aggregation (FedSA). The goal of FedSA is to train a student model for a new task with the help of several decentralized teachers, whose pre-training…

Computer Vision and Pattern Recognition · Computer Science 2022-07-28 Donglin Xie , Ruonan Yu , Gongfan Fang , Jie Song , Zunlei Feng , Xinchao Wang , Li Sun , Mingli Song

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

Machine learning in medical research, by nature, needs careful attention on obeying the regulations of data privacy, making it difficult to train a machine learning model over gathered data from different medical centers. Failure of…

Machine Learning · Computer Science 2021-10-19 Jun Luo , Shandong Wu

Federated Learning has been introduced as a new machine learning paradigm enhancing the use of local devices. At a server level, FL regularly aggregates models learned locally on distributed clients to obtain a more general model. Current…

Machine Learning · Computer Science 2022-07-19 Anastasiia Usmanova , François Portet , Philippe Lalanda , German Vega

While federated learning is promising for privacy-preserving collaborative learning without revealing local data, it remains vulnerable to white-box attacks and struggles to adapt to heterogeneous clients. Federated distillation (FD), built…

Machine Learning · Computer Science 2023-12-18 Jiawei Shao , Fangzhao Wu , Jun Zhang

Federated Learning (FL) provides decentralised model training, which effectively tackles problems such as distributed data and privacy preservation. However, the generalisation of global models frequently faces challenges from data…

Machine Learning · Computer Science 2025-09-05 Ozgu Goksu , Nicolas Pugeault

Remote physiological measurement gained wide attention, while it requires collecting users' privacy-sensitive information, and existing contactless measurements still rely on labeled client data. This presents challenges when we want to…

Computer Vision and Pattern Recognition · Computer Science 2025-11-11 Xiao Yang , Dengbo He , Jiyao Wang , Kaishun Wu