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Federated learning (FL) facilitates a privacy-preserving neural network training paradigm through collaboration between edge clients and a central server. One significant challenge is that the distributed data is not independently and…

Computer Vision and Pattern Recognition · Computer Science 2024-09-12 Yu Qiao , Huy Q. Le , Mengchun Zhang , Apurba Adhikary , Chaoning Zhang , Choong Seon Hong

Federated Learning (FL) has emerged as a vital paradigm in modern machine learning that enables collaborative training across decentralized data sources without exchanging raw data. This approach not only addresses privacy concerns but also…

Machine Learning · Computer Science 2025-08-19 Zahra Kharaghani , Ali Dadras , Tommy Löfstedt

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 Learning (FL) enables the multiple participating devices to collaboratively contribute to a global neural network model while keeping the training data locally. Unlike the centralized training setting, the non-IID and imbalanced…

Machine Learning · Computer Science 2024-04-16 Moming Duan , Duo Liu , Xinyuan Ji , Renping Liu , Liang Liang , Xianzhang Chen , Yujuan Tan

Federated learning enables different parties to collaboratively build a global model under the orchestration of a server while keeping the training data on clients' devices. However, performance is affected when clients have heterogeneous…

Machine Learning · Computer Science 2022-06-20 Fabiola Espinoza Castellon , Aurelien Mayoue , Jacques-Henri Sublemontier , Cedric Gouy-Pailler

Federated Learning (FL) is an evolving distributed machine learning approach that safeguards client privacy by keeping data on edge devices. However, the variation in data among clients poses challenges in training models that excel across…

Machine Learning · Computer Science 2025-03-04 Yongxin Guo , Xiaoying Tang , Tao Lin

Federated learning is a decentralized learning paradigm wherein a central server trains a global model iteratively by utilizing clients who possess a certain amount of private datasets. The challenge lies in the fact that the client side…

Machine Learning · Computer Science 2023-12-25 Shaohan Sha , YaFeng Sun

Though successful, federated learning presents new challenges for machine learning, especially when the issue of data heterogeneity, also known as Non-IID data, arises. To cope with the statistical heterogeneity, previous works incorporated…

Machine Learning · Computer Science 2022-10-03 Mahdi Morafah , Saeed Vahidian , Chen Chen , Mubarak Shah , Bill Lin

In the era of big data, we are often facing the challenge of data heterogeneity and the lack of label information simultaneously. In the financial domain (e.g., fraud detection), the heterogeneous data may include not only numerical data…

Machine Learning · Computer Science 2023-02-14 Lecheng Zheng , Yada Zhu , Jingrui He

Federated Learning (FL) enables decentralized training of machine learning models on distributed data while preserving privacy. However, in real-world FL settings, client data is often non-identically distributed and imbalanced, resulting…

Machine Learning · Computer Science 2025-09-18 Gergely D. Németh , Eros Fanì , Yeat Jeng Ng , Barbara Caputo , Miguel Ángel Lozano , Nuria Oliver , Novi Quadrianto

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

Federated learning (FL) is an emerging distributed machine learning paradigm enabling collaborative model training on decentralized devices without exposing their local data. A key challenge in FL is the uneven data distribution across…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-03-08 Md Sirajul Islam , Simin Javaherian , Fei Xu , Xu Yuan , Li Chen , Nian-Feng Tzeng

In this paper, we propose a one-stage online clustering method called Contrastive Clustering (CC) which explicitly performs the instance- and cluster-level contrastive learning. To be specific, for a given dataset, the positive and negative…

Machine Learning · Computer Science 2020-09-22 Yunfan Li , Peng Hu , Zitao Liu , Dezhong Peng , Joey Tianyi Zhou , Xi Peng

Federated learning is a method of training a global model from decentralized data distributed across client devices. Here, model parameters are computed locally by each client device and exchanged with a central server, which aggregates the…

Machine Learning · Computer Science 2020-12-23 Sagar Dhakal , Saurav Prakash , Yair Yona , Shilpa Talwar , Nageen Himayat

Federated Learning (FL) is currently the most widely adopted framework for collaborative training of (deep) machine learning models under privacy constraints. Albeit it's popularity, it has been observed that Federated Learning yields…

Machine Learning · Computer Science 2019-10-07 Felix Sattler , Klaus-Robert Müller , Wojciech Samek

Federated Learning is a widely adopted method to train neural networks over distributed data. One main limitation is the performance degradation that occurs when data is heterogeneously distributed. While many works have attempted to…

Machine Learning · Computer Science 2024-06-12 Ha Min Son , Moon Hyun Kim , Tai-Myoung Chung

In the realm of real-world devices, centralized servers in Federated Learning (FL) present challenges including communication bottlenecks and susceptibility to a single point of failure. Additionally, contemporary devices inherently exhibit…

Machine Learning · Computer Science 2024-08-15 Yasser H. Khalil , Amir H. Estiri , Mahdi Beitollahi , Nader Asadi , Sobhan Hemati , Xu Li , Guojun Zhang , Xi Chen

Clustered Federated Learning has emerged as an effective approach for handling heterogeneous data across clients by partitioning them into clusters with similar or identical data distributions. However, most existing methods, including the…

Machine Learning · Computer Science 2026-03-03 Jonas Kirch , Sebastian Becker , Tiago Koketsu Rodrigues , Stefan Harmeling

Most of existing clustering algorithms are proposed without considering the selection bias in data. In many real applications, however, one cannot guarantee the data is unbiased. Selection bias might bring the unexpected correlation between…

Machine Learning · Computer Science 2020-07-03 Xiao Wang , Shaohua Fan , Kun Kuang , Chuan Shi , Jiawei Liu , Bai Wang

Federated learning (FL) is an emerging technique that trains massive and geographically distributed edge data while maintaining privacy. However, FL has inherent challenges in terms of fairness and computational efficiency due to the rising…

Machine Learning · Computer Science 2023-04-28 Yingchun Wang , Jingcai Guo , Jie Zhang , Song Guo , Weizhan Zhang , Qinghua Zheng