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Federated learning (FL) is an emerging learning paradigm to tackle massively distributed data. In Federated Learning, a set of clients jointly perform a machine learning task under the coordination of a server. The FedAvg algorithm is one…

Machine Learning · Computer Science 2023-02-14 Junyi Li , Feihu Huang , Heng Huang

Fine-tuning large language models (LLMs) is computationally intensive because it requires updating all parameters. Low-Rank Adaptation (LoRA) improves efficiency by modifying only a subset of weights but introduces a trade-off between…

Machine Learning · Computer Science 2024-12-19 Abdessalam Ed-dib , Zhanibek Datbayev , Amine Mohamed Aboussalah

Large language models and text encoders increasingly power web-based information systems in the social sciences, including digital libraries, data catalogues, and search interfaces used by researchers, policymakers, and civil society. Full…

Computation and Language · Computer Science 2026-01-15 Zeqiang Wang , Xinyue Wu , Chenxi Li , Zixi Chen , Nishanth Sastry , Jon Johnson , Suparna De

In federated learning, fine-tuning pre-trained foundation models poses significant challenges, particularly regarding high communication cost and suboptimal model performance due to data heterogeneity between the clients. To address these…

Machine Learning · Computer Science 2025-04-22 Yongle Li , Bo Liu , Sheng Huang , ZHeng ZHang , Xiaotong Yuan , Richang Hong

Low-rank adaptation (LoRA) has emerged as the de facto standard for parameter-efficient fine-tuning (PEFT) of foundation models, enabling the adaptation of billion-parameter networks with minimal computational and memory overhead. Despite…

Machine Learning · Computer Science 2026-04-24 Bingcong Li , Yilang Zhang , Georgios B. Giannakis

Group Relative Policy Optimization (GRPO) has recently emerged as an effective approach for improving the reasoning capabilities of large language models through online multi-objective reinforcement learning. While personalization on…

Machine Learning · Computer Science 2026-02-03 Ziyao Wang , Daeun Jung , Yexiao He , Guoheng Sun , Zheyu Shen , Myungjin Lee , Ang Li

Low-rank adapation (LoRA) is a popular method that reduces the number of trainable parameters when finetuning large language models, but still faces acute storage challenges when scaling to even larger models or deploying numerous per-user…

Computation and Language · Computer Science 2024-01-17 Dawid J. Kopiczko , Tijmen Blankevoort , Yuki M. Asano

Low-Rank Adaptation (LoRA) and its variants have delivered strong capability in Parameter-Efficient Transfer Learning (PETL) by minimizing trainable parameters and benefiting from reparameterization. However, their projection matrices…

Computer Vision and Pattern Recognition · Computer Science 2025-07-29 Yue Zhu , Haiwen Diao , Shang Gao , Jiazuo Yu , Jiawen Zhu , Yunzhi Zhuge , Shuai Hao , Xu Jia , Lu Zhang , Ying Zhang , Huchuan Lu

Low-Rank Adaptation (LoRA) has emerged as an effective technique for reducing memory overhead in fine-tuning large language models. However, it often suffers from sub-optimal performance compared with full fine-tuning since the update is…

Machine Learning · Computer Science 2025-09-30 Xin Yu , Yujia Wang , Jinghui Chen , Lingzhou Xue

Fine-tuning large-scale pretrained models is prohibitively expensive in terms of computational and memory costs. LoRA, as one of the most popular Parameter-Efficient Fine-Tuning (PEFT) methods, offers a cost-effective alternative by…

Machine Learning · Computer Science 2024-07-17 Shaowen Wang , Linxi Yu , Jian Li

Low-rank adaptation (LoRA) reduces the computational and memory demands of fine-tuning large language models (LLMs) by approximating updates with low-rank matrices. However, low-rank approximation in two-dimensional space fails to capture…

Computation and Language · Computer Science 2024-12-31 Xiaolin Hu , Xiang Cheng , Peiyu Liu , Wei Liu , Jian Luan , Bin Wang , Yong Liu

Parameter-efficient fine-tuning techniques such as low-rank adaptation (LoRA) enable large language models (LLMs) to adapt to downstream tasks efficiently. Federated learning (FL) further facilitates this process by enabling collaborative…

Machine Learning · Computer Science 2026-03-09 Chuiyang Meng , Ming Tang , Vincent W. S. Wong

With the breakthrough of Transformer-based pre-trained models, the demand for fine-tuning (FT) to adapt the base pre-trained models to downstream applications continues to grow, so it is essential for service providers to reduce the cost of…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-09-03 Sheng Lin , Fangcheng Fu , Haoyang Li , Hao Ge , Xuanyu Wang , Jiawen Niu , Yaofeng Tu , Bin Cui

Low-rank adaptation (LoRA) has become a widely used paradigm for parameter-efficient fine-tuning of large language models, yet its representational capacity often lags behind full fine-tuning. Within the context of LoRA, a key open question…

Machine Learning · Computer Science 2025-11-04 Xin Yu , Cong Xie , Ziyu Zhao , Tiantian Fan , Lingzhou Xue , Zhi Zhang

In this paper, we present Delta-LoRA, which is a novel parameter-efficient approach to fine-tune large language models (LLMs). In contrast to LoRA and other low-rank adaptation methods such as AdaLoRA, Delta-LoRA not only updates the…

Machine Learning · Computer Science 2023-09-06 Bojia Zi , Xianbiao Qi , Lingzhi Wang , Jianan Wang , Kam-Fai Wong , Lei Zhang

Large pre-trained models, such as large language models (LLMs), present significant resource challenges for fine-tuning due to their extensive parameter sizes, especially for applications in mobile systems. To address this, Low-Rank…

Machine Learning · Computer Science 2024-07-18 Yuzhu Mao , Siqi Ping , Zihao Zhao , Yang Liu , Wenbo Ding

Federated learning systems have been identified as an efficient approach to scaling distributed model training with a large amount of participants or data owners while guaranteeing data privacy. To apply the current most popular pre-trained…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-03-04 Qianli Liu , Zhaorui Zhang , Xin Yao , Benben Liu

To protect privacy and meet legal regulations, federated learning (FL) has gained significant attention for training speech-to-text (S2T) systems, including automatic speech recognition (ASR) and speech translation (ST). However, the…

Computation and Language · Computer Science 2025-01-22 Yichao Du , Zhirui Zhang , Linan Yue , Xu Huang , Yuqing Zhang , Tong Xu , Linli Xu , Enhong Chen

Federated Learning (FL) has recently been applied to the parameter-efficient fine-tuning of Large Language Models (LLMs). While promising, it raises significant challenges due to the heterogeneous resources and data distributions of…

Computation and Language · Computer Science 2024-05-31 Jiamu Bai , Daoyuan Chen , Bingchen Qian , Liuyi Yao , Yaliang Li

In this paper, we show that Low Rank Adaptation (LoRA) as originally introduced in Hu et al. (2021) leads to suboptimal finetuning of models with large width (embedding dimension). This is due to the fact that adapter matrices A and B in…

Machine Learning · Computer Science 2024-07-08 Soufiane Hayou , Nikhil Ghosh , Bin Yu