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Fine-tuning foundation models is critical for superior performance on personalized downstream tasks, compared to using pre-trained models. Collaborative learning can leverage local clients' datasets for fine-tuning, but limited client data…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-08-15 Tianjun Yuan , Jiaxiang Geng , Pengchao Han , Xianhao Chen , Bing Luo

Recently, a large number of data sources opened up by informatization intensify the data heterogeneity, the faster speed of data generation and the gradual implementation of data regulations limit the storage time of data. In personalized…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-02-03 Sixing Tan , Xianmin Liu

Federated learning (FL) has emerged as a promising framework for distributed machine learning. It enables collaborative learning among multiple clients, utilizing distributed data and computing resources. However, FL faces challenges in…

Machine Learning · Computer Science 2024-09-23 Hojat Allah Salehi , Md Jueal Mia , S. Sandeep Pradhan , M. Hadi Amini , Farhad Shirani

In many real-world applications of machine learning, data are distributed across many clients and cannot leave the devices they are stored on. Furthermore, each client's data, computational resources and communication constraints may be…

Machine Learning · Statistics 2019-12-02 Mrinank Sharma , Michael Hutchinson , Siddharth Swaroop , Antti Honkela , Richard E. Turner

While federated learning (FL) eliminates the transmission of raw data over a network, it is still vulnerable to privacy breaches from the communicated model parameters. In this work, we propose Multi-Tier Federated Learning with Multi-Tier…

Machine Learning · Computer Science 2024-11-11 Evan Chen , Frank Po-Chen Lin , Dong-Jun Han , Christopher G. Brinton

Federated learning (FL), where data remains at the federated clients, and where only gradient updates are shared with a central aggregator, was assumed to be private. Recent work demonstrates that adversaries with gradient-level access can…

Machine Learning · Computer Science 2022-06-13 Varun Chandrasekaran , Suman Banerjee , Diego Perino , Nicolas Kourtellis

Industrial chemical plants often operate under strict data confidentiality constraints, making centralized data-driven process modeling difficult. Federated learning (FL) provides a promising solution by enabling collaborative model…

Machine Learning · Computer Science 2026-04-30 Teetat Pipattaratonchai , Aueaphum Aueawatthanaphisut

Personalized Federated Learning (PFL) aims to learn personalized models for each client based on the knowledge across all clients in a privacy-preserving manner. Existing PFL methods generally assume that the underlying global data across…

Machine Learning · Computer Science 2023-03-28 Yang Lu , Pinxin Qian , Gang Huang , Hanzi Wang

Federated learning (FL) is a decentralized privacy-preserving learning technique in which clients learn a joint collaborative model through a central aggregator without sharing their data. In this setting, all clients learn a single common…

Machine Learning · Computer Science 2021-06-01 Siddharth Divi , Habiba Farrukh , Berkay Celik

Traditional Federated Learning (FL) methods encounter significant challenges when dealing with heterogeneous data and providing personalized solutions for non-IID scenarios. Personalized Federated Learning (PFL) approaches aim to address…

Machine Learning · Computer Science 2025-11-11 Yasaman Saadati , Mohammad Rostami , M. Hadi Amini

Federated learning (FL) is a distributed machine learning (ML) framework where multiple clients collaborate to train a model without exposing their private data. FL involves cycles of local computations and bi-directional communications…

Cryptography and Security · Computer Science 2023-08-22 Xiangjian Hou , Sarit Khirirat , Mohammad Yaqub , Samuel Horvath

Aligning the output of Large Language Models (LLMs) with human preferences (e.g., by means of reinforcement learning with human feedback, or RLHF) is essential for ensuring their effectiveness in real-world scenarios. Despite significant…

Artificial Intelligence · Computer Science 2024-10-23 Pietro Bernardelle , Gianluca Demartini

Federated Learning (FL) is a distributed framework for collaborative model training over large-scale distributed data, enabling higher performance while maintaining client data privacy. However, the nature of model aggregation at the…

Machine Learning · Computer Science 2025-06-10 Ali Murad , Bo Hui , Wei-Shinn Ku

Federated Learning (FL) is emerging as a promising paradigm of privacy-preserving machine learning, which trains an algorithm across multiple clients without exchanging their data samples. Recent works highlighted several privacy and…

Cryptography and Security · Computer Science 2021-06-15 Yaowei Han , Yang Cao , Masatoshi Yoshikawa

Differentially private federated learning (DP-FL) often suffers from slow convergence under tight privacy budgets because the noise required for privacy preservation degrades gradient quality. Although second-order optimization can…

Machine Learning · Computer Science 2026-03-25 Sidhant Nair , Tanmay Sen , Mrinmay Sen , Sayantan Banerjee

Federated Learning (FL) enables training ML models on edge clients without sharing data. However, the federated model's performance on local data varies, disincentivising the participation of clients who benefit little from FL. Fair FL…

Machine Learning · Computer Science 2023-05-05 Alex Iacob , Pedro P. B. Gusmão , Nicholas D. Lane

Federated Learning (FL) allows users to share knowledge instead of raw data to train a model with high accuracy. Unfortunately, during the training, users lose control over the knowledge shared, which causes serious data privacy issues. We…

Machine Learning · Computer Science 2024-11-05 ShiMao Xu , Xiaopeng Ke , Xing Su , Shucheng Li , Hao Wu , Sheng Zhong , Fengyuan Xu

Federated learning (FL) enables collaborative model training across decentralized clients without sharing local data, but is challenged by heterogeneity in data, computation, and communication. Pretrained vision-language models (VLMs), with…

Machine Learning · Computer Science 2025-06-27 Yuguang Zhang , Kuangpu Guo , Zhihe Lu , Yunbo Wang , Jian Liang

Reinforcement Learning from Human Feedback (RLHF) is currently the most widely used method to align large language models (LLMs) with human preferences. Existing RLHF methods can be roughly categorized as either reward-based or reward-free.…

Computation and Language · Computer Science 2024-10-11 Shusheng Xu , Wei Fu , Jiaxuan Gao , Wenjie Ye , Weilin Liu , Zhiyu Mei , Guangju Wang , Chao Yu , Yi Wu

Federated recommendations leverage the federated learning (FL) techniques to make privacy-preserving recommendations. Though recent success in the federated recommender system, several vital challenges remain to be addressed: (i) The…

Information Retrieval · Computer Science 2022-08-25 Sichun Luo , Yuanzhang Xiao , Yang Liu , Congduan Li , Linqi Song