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Federated Learning (FL) emerged as a decentralized paradigm to train models while preserving privacy. However, conventional FL struggles with data heterogeneity and class imbalance, which degrade model performance. Clustered FL balances…

Machine Learning · Computer Science 2025-05-05 Alessandro Licciardi , Davide Leo , Eros Fanì , Barbara Caputo , Marco Ciccone

One of the main challenges of federated learning (FL) is handling non-independent and identically distributed (non-IID) client data, which may occur in practice due to unbalanced datasets and use of different data sources across clients.…

Machine Learning · Computer Science 2024-10-23 Peng Wu , Tales Imbiriba , Pau Closas

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

The increasingly stringent regulations on privacy protection have sparked interest in federated learning. As a distributed machine learning framework, it bridges isolated data islands by training a global model over devices while keeping…

Information Retrieval · Computer Science 2022-05-27 Zhitao Zhu , Shijing Si , Jianzong Wang , Jing Xiao

Federated Learning (FL) is a distributed learning scheme to train a shared model across clients. One common and fundamental challenge in FL is that the sets of data across clients could be non-identically distributed and have different…

Machine Learning · Computer Science 2023-05-23 Junyi Zhu , Xingchen Ma , Matthew B. Blaschko

Spectral clustering has emerged as one of the most effective clustering algorithms due to its superior performance. However, most existing models are designed for centralized settings, rendering them inapplicable in modern decentralized…

Machine Learning · Computer Science 2026-04-17 Suyan Dai , Gan Sun , Fazeng Li , Xu Tang , Qianqian Wang , Yang Cong

Federated Learning (FL) allows collaborative machine learning training without sharing private data. Numerous studies have shown that one significant factor affecting the performance of federated learning models is the heterogeneity of data…

Machine Learning · Computer Science 2024-09-30 Liang Kuang , Kuangpu Guo , Jian Liang , Jianguo Zhang

Federated Learning provides a privacy-preserving paradigm for distributed learning, but suffers from statistical heterogeneity across clients. Personalized Federated Learning (PFL) mitigates this issue by considering client-specific models.…

Machine Learning · Statistics 2026-02-17 Ala Emrani , Amir Najafi , Abolfazl Motahari

We consider two federated learning algorithms for training partially personalized models, where the shared and personal parameters are updated either simultaneously or alternately on the devices. Both algorithms have been proposed in the…

Machine Learning · Computer Science 2022-08-17 Krishna Pillutla , Kshitiz Malik , Abdelrahman Mohamed , Michael Rabbat , Maziar Sanjabi , Lin Xiao

Convex clustering has recently garnered increasing interest due to its attractive theoretical and computational properties, but its merits become limited in the face of high-dimensional data. In such settings, pairwise affinity terms that…

Methodology · Statistics 2021-04-02 Saptarshi Chakraborty , Jason Xu

This paper proposes a locally differentially private federated learning algorithm for strongly convex but possibly nonsmooth problems that protects the gradients of each worker against an honest but curious server. The proposed algorithm…

Machine Learning · Computer Science 2023-08-03 Jiaojiao Zhang , Dominik Fay , Mikael Johansson

The demand for collaborative and private bandit learning across multiple agents is surging due to the growing quantity of data generated from distributed systems. Federated bandit learning has emerged as a promising framework for private,…

Machine Learning · Computer Science 2024-03-04 Ethan Blaser , Chuanhao Li , Hongning Wang

We study the large sample behavior of a convex clustering framework, which minimizes the sample within cluster sum of squares under an~$\ell_1$ fusion constraint on the cluster centroids. This recently proposed approach has been gaining in…

Methodology · Statistics 2016-12-30 Peter Radchenko , Gourab Mukherjee

In practice, many machine learning (ML) problems come with constraints, and their applied domains involve distributed sensitive data that cannot be shared with others, e.g., in healthcare. Collaborative learning in such practical scenarios…

Machine Learning · Computer Science 2024-05-02 Chuan He , Le Peng , Ju Sun

Federated learning (FL) enables collaboratively training deep learning models on decentralized data. However, there are three types of heterogeneities in FL setting bringing about distinctive challenges to the canonical federated learning…

Machine Learning · Computer Science 2020-09-18 Tao Shen , Jie Zhang , Xinkang Jia , Fengda Zhang , Gang Huang , Pan Zhou , Kun Kuang , Fei Wu , Chao Wu

Federated learning is a distributed, on-device computation framework that enables training global models without exporting sensitive user data to servers. In this work, we describe methods to extend the federation framework to evaluate…

Machine Learning · Computer Science 2019-10-24 Kangkang Wang , Rajiv Mathews , Chloé Kiddon , Hubert Eichner , Françoise Beaufays , Daniel Ramage

Federated Learning (FL) is a machine learning paradigm that safeguards privacy by retaining client data on edge devices. However, optimizing FL in practice can be challenging due to the diverse and heterogeneous nature of the learning…

Machine Learning · Computer Science 2024-06-11 Yongxin Guo , Xiaoying Tang , Tao Lin

Federated learning (FL) is a decentralized machine learning technique that enables multiple clients to collaboratively train models without requiring clients to reveal their raw data to each other. Although traditional FL trains a single…

Machine Learning · Computer Science 2023-11-22 Junki Mori , Tomoyuki Yoshiyama , Furukawa Ryo , Isamu Teranishi

In this paper, a secure and communication-efficient clustered federated learning (CFL) design is proposed. In our model, several base stations (BSs) with heterogeneous task-handling capabilities and multiple users with non-independent and…

Machine Learning · Computer Science 2025-07-11 Dongyu Wei , Xiaoren Xu , Shiwen Mao , Mingzhe Chen

Federated learning with differential privacy, or private federated learning, provides a strategy to train machine learning models while respecting users' privacy. However, differential privacy can disproportionately degrade the performance…

Machine Learning · Computer Science 2022-04-18 Borja Rodríguez-Gálvez , Filip Granqvist , Rogier van Dalen , Matt Seigel