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Heterogeneous data are commonly adopted as the inputs for some models that predict the future trends of some observations. Existing predictive models typically ignore the inconsistencies and imperfections in heterogeneous data while also…

Machine Learning · Computer Science 2022-05-10 Zhengjing Ma , Gang Mei , Salvatore Cuomo , Francesco Piccialli

Learning from distributed data without accessing them is undoubtedly a challenging and non-trivial task. Nevertheless, the necessity for distributed training of a statistical model has been increasing, due to the privacy concerns of local…

Machine Learning · Statistics 2024-08-02 Seok-Ju Hahn

Availability of large, diverse, and multi-national datasets is crucial for the development of effective and clinically applicable AI systems in the medical imaging domain. However, forming a global model by bringing these datasets together…

Machine Learning · Computer Science 2022-09-07 Ece Isik-Polat , Gorkem Polat , Altan Kocyigit , Alptekin Temizel

We study the problem of learning a linear system model from the observations of $M$ clients. The catch: Each client is observing data from a different dynamical system. This work addresses the question of how multiple clients…

Machine Learning · Computer Science 2022-11-29 Han Wang , Leonardo F. Toso , James Anderson

The issue of group fairness in machine learning models, where certain sub-populations or groups are favored over others, has been recognized for some time. While many mitigation strategies have been proposed in centralized learning, many of…

Machine Learning · Computer Science 2023-05-18 Ganghua Wang , Ali Payani , Myungjin Lee , Ramana Kompella

Federated Learning (FL) is a machine learning paradigm that allows decentralized clients to learn collaboratively without sharing their private data. However, excessive computation and communication demands pose challenges to current FL…

Cryptography and Security · Computer Science 2022-09-22 Yue Tan , Guodong Long , Jie Ma , Lu Liu , Tianyi Zhou , Jing Jiang

We consider the problem of personalized federated learning when there are known cluster structures within users. An intuitive approach would be to regularize the parameters so that users in the same cluster share similar model weights. The…

Machine Learning · Computer Science 2022-04-29 Boxiang Lyu , Filip Hanzely , Mladen Kolar

Federated learning (FL) has emerged as a key paradigm for collaborative model training across multiple clients without sharing raw data, enabling privacy-preserving applications in areas such as radiology and pathology. However, works on…

Machine Learning · Computer Science 2025-10-31 Furkan Pala , Islem Rekik

Federated learning has emerged as a paradigm to train models collaboratively on inherently distributed client data while safeguarding privacy. In this context, personalized federated learning tackles the challenge of data heterogeneity by…

Machine Learning · Computer Science 2026-03-13 Peng Hu , Jianwei Ma

Federated Learning is an emerging privacy-preserving distributed machine learning approach to building a shared model by performing distributed training locally on participating devices (clients) and aggregating the local models into a…

Machine Learning · Computer Science 2021-04-15 Sreya Francis , Irene Tenison , Irina Rish

Federated learning (FL) aims at optimizing a shared global model over multiple edge devices without transmitting (private) data to the central server. While it is theoretically well-known that FL yields an optimal model -- centrally trained…

Machine Learning · Computer Science 2022-11-01 Youngjoon Lee , Sangwoo Park , Joonhyuk Kang

One of the key challenges of collaborative machine learning, without data sharing, is multimodal data heterogeneity in real-world settings. While Federated Learning (FL) enables model training across multiple clients, existing frameworks,…

Machine Learning · Computer Science 2025-10-16 Alejandro Guerra-Manzanares , Omar El-Herraoui , Michail Maniatakos , Farah E. Shamout

Many machine learning algorithms have been developed under the assumption that data sets are already available in batch form. Yet in many application domains data is only available sequentially overtime via compute nodes in different…

Optimization and Control · Mathematics 2020-09-10 Alfredo Garcia , Luochao Wang , Jeff Huang , Lingzhou Hong

Federated learning is a form of distributed learning with the key challenge being the non-identically distributed nature of the data in the participating clients. In this paper, we extend federated learning to the setting where multiple…

Machine Learning · Computer Science 2022-07-12 Neelkamal Bhuyan , Sharayu Moharir

Federated learning (FL) on heterogeneous data (non-IID data) has recently received great attention. Most existing methods focus on studying the convergence guarantees for the global objective. While these methods can guarantee the decrease…

Machine Learning · Computer Science 2023-11-22 Shu Zheng , Tiandi Ye , Xiang Li , Ming Gao

Federated Learning (FL) facilitates collaborative machine learning by training models on local datasets, and subsequently aggregating these local models at a central server. However, the frequent exchange of model parameters between clients…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-04-15 Liwei Wang , Jun Li , Wen Chen , Qingqing Wu , Ming Ding

In Federated Learning, we aim to train models across multiple computing units (users), while users can only communicate with a common central server, without exchanging their data samples. This mechanism exploits the computational power of…

Machine Learning · Computer Science 2020-10-26 Alireza Fallah , Aryan Mokhtari , Asuman Ozdaglar

Federated learning is widely used to perform decentralized training of a global model on multiple devices while preserving the data privacy of each device. However, it suffers from heterogeneous local data on each training device which…

Machine Learning · Computer Science 2023-01-18 Sirui Hu , Ling Feng , Xiaohan Yang , Yongchao Chen

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

Discriminative unsupervised learning methods such as contrastive learning have demonstrated the ability to learn generalized visual representations on centralized data. It is nonetheless challenging to adapt such methods to a distributed…

Computer Vision and Pattern Recognition · Computer Science 2025-06-13 Yuewei Yang , Jingwei Sun , Ang Li , Hai Li , Yiran Chen