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Low-Rank Adaptation (LoRA) enables parameter-efficient fine-tuning of Large Language Models (LLMs), and recent Mixture-of-Experts (MoE) extensions further enhance flexibility by dynamically combining multiple LoRA experts. However, existing…

机器学习 · 计算机科学 2026-04-14 Lin Mu , Haiyang Wang , Li Ni , Lei Sang , Zhize Wu , Peiquan Jin , Yiwen Zhang

We study the computational limits of Low-Rank Adaptation (LoRA) for finetuning transformer-based models using fine-grained complexity theory. Our key observation is that the existence of low-rank decompositions within the gradient…

机器学习 · 计算机科学 2025-06-09 Jerry Yao-Chieh Hu , Maojiang Su , En-Jui Kuo , Zhao Song , Han Liu

The "pretrain-then-finetune" paradigm is commonly adopted in the deployment of large language models. Low-Rank Adaptation (LoRA), a parameter-efficient fine-tuning method, is often employed to adapt a base model to a multitude of tasks,…

LoRA achieves remarkable resource efficiency and comparable performance when adapting LLMs for specific tasks. Since ChatGPT demonstrated superior performance on various tasks, there has been a growing desire to adapt one model for all…

机器学习 · 计算机科学 2023-11-21 Yiming Wang , Yu Lin , Xiaodong Zeng , Guannan Zhang

Human Activity Recognition is a foundational task in pervasive computing. While recent advances in self-supervised learning and transformer-based architectures have significantly improved HAR performance, adapting large pretrained models to…

机器学习 · 计算机科学 2025-12-23 Irina Seregina , Philippe Lalanda , German Vega

Parameter-efficient fine-tuning methods, such as LoRA, reduces the number of trainable parameters. However, they often suffer from scalability issues and differences between their learning pattern and full fine-tuning. To overcome these…

机器学习 · 计算机科学 2025-01-22 Hamid Nasiri , Peter Garraghan

We present a data-adaptive method for parameter-efficient fine-tuning of large neural networks. Standard low-rank adaptation methods improve efficiency by restricting each layer update to a fixed low-rank form, but this static…

机器学习 · 计算机科学 2026-05-12 Omatharv Bharat Vaidya , Connor T. Jerzak , Nhat Ho , Chandrajit Bajaj

Low-rank adaptation (LoRA) has emerged as a leading parameter-efficient fine-tuning technique for adapting large foundation models, yet it often locks adapters into suboptimal minima near their initialization. This hampers model…

机器学习 · 计算机科学 2025-07-29 Zhan Zhuang , Xiequn Wang , Wei Li , Yulong Zhang , Qiushi Huang , Shuhao Chen , Xuehao Wang , Yanbin Wei , Yuhe Nie , Kede Ma , Yu Zhang , Ying Wei

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…

机器学习 · 计算机科学 2024-07-08 Soufiane Hayou , Nikhil Ghosh , Bin Yu

We introduce PHLoRA (Pronounced "flora"). (Post-hoc LoRA), a simple yet powerful method to extract low-rank adaptation adapters from full-rank fine-tuned models without requiring access to training data or gradients. By computing the…

机器学习 · 计算机科学 2025-09-16 Bhoomit Vasani , Jack FitzGerald , Anjie Fang , Sushmit Vaish

Low-rank adaptation is a popular parameter-efficient fine-tuning method for large language models. In this paper, we analyze the impact of low-rank updating, as implemented in LoRA. Our findings suggest that the low-rank updating mechanism…

Low-rank adaptation is effective partly because downstream updates lie in a low-dimensional subspace, but the latent rank coordinates of LoRA are not identifiable: any invertible reparameterization of the adapter factors leaves the weight…

机器学习 · 计算机科学 2026-05-13 Cooper Doyle , Andy Hu , Rebecca Chan , Anna Leontjeva

Low-Rank Adaptation (LoRA), which leverages the insight that model updates typically reside in a low-dimensional space, has significantly improved the training efficiency of Large Language Models (LLMs) by updating neural network layers…

机器学习 · 计算机科学 2026-05-01 Han Liu , Shanghao Shi , Yevgeniy Vorobeychik , Chongjie Zhang , Ning Zhang

This work proposes a low complexity nonlinearity model and develops adaptive algorithms over it. The model is based on the decomposable---or rank-one, in tensor language---Volterra kernels. It may also be described as a product of FIR…

系统与控制 · 计算机科学 2016-10-25 Felipe C. Pinheiro , Cassio G. Lopes

Low-Rank Adaptation (LoRA) is the bread and butter of Large Language Model (LLM) finetuning. LoRA learns an additive low-rank perturbation, $AB$, of a pretrained matrix parameter $W$ to align the model to a new task or dataset with $W+AB$.…

机器学习 · 计算机科学 2024-10-15 Hai Huang , Randall Balestriero

Large Multimodal Models (LMMs) have shown significant progress in various complex vision tasks with the solid linguistic and reasoning capacity inherited from large language models (LMMs). Low-rank adaptation (LoRA) offers a promising…

计算机视觉与模式识别 · 计算机科学 2025-04-04 Liang Mi , Weijun Wang , Wenming Tu , Qingfeng He , Rui Kong , Xinyu Fang , Yazhu Dong , Yikang Zhang , Yunchun Li , Meng Li , Haipeng Dai , Guihai Chen , Yunxin Liu

Low-Rank Adaptation (LoRA) dominates parameter-efficient fine-tuning of large language models, yet most variants target dense architectures. Mixture-of-Experts (MoE) models scale parameters at near-constant per-token compute, and their…

机器学习 · 计算机科学 2026-05-20 Jia Wei , Zhonghao Zhang , Ping Chen , Qianyang li , Yancheng Pan , Shaoxun Wang , Ziyi Qiu , Longxiang Wang

Low-rank adaptation (LoRA) is a popular method for fine-tuning large-scale pre-trained models in downstream tasks by learning low-rank incremental matrices. Though LoRA and its variants effectively reduce the number of trainable parameters…

机器学习 · 计算机科学 2024-03-21 Rushi Qiang , Ruiyi Zhang , Pengtao Xie

Low-Rank Adaptation (LoRA) has emerged as one of the most effective, computationally tractable fine-tuning approaches for training Vision-Language Models (VLMs) and Large Language Models (LLMs). LoRA accomplishes this by freezing the…

Low-Rank Adaptation (LoRA) is extensively utilized in text-to-image models for the accurate rendition of specific elements like distinct characters or unique styles in generated images. Nonetheless, existing methods face challenges in…

计算机视觉与模式识别 · 计算机科学 2024-11-20 Ming Zhong , Yelong Shen , Shuohang Wang , Yadong Lu , Yizhu Jiao , Siru Ouyang , Donghan Yu , Jiawei Han , Weizhu Chen