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Large Language Models (LLMs) as autonomous agents are increasingly tasked with solving complex, long-horizon problems. Aligning these agents via preference-based offline methods like Direct Preference Optimization (DPO) is a promising…

Machine Learning · Computer Science 2026-03-03 Heyang Gao , Zexu Sun , Erxue Min , Hengyi Cai , Shuaiqiang Wang , Dawei Yin , Xu Chen

A key challenge to make effective use of evolutionary algorithms is to choose appropriate settings for their parameters. However, the appropriate parameter setting generally depends on the structure of the optimisation problem, which is…

Neural and Evolutionary Computing · Computer Science 2020-04-02 Brendan Case , Per Kristian Lehre

Parameterizable machine learning (ML) accelerators are the product of recent breakthroughs in ML. To fully enable their design space exploration (DSE), we propose a physical-design-driven, learning-based prediction framework for…

Hyperparameter optimisation is a crucial process in searching the optimal machine learning model. The efficiency of finding the optimal hyperparameter settings has been a big concern in recent researches since the optimisation process could…

Machine Learning · Computer Science 2020-09-15 Yuxi Huan , Fan Wu , Michail Basios , Leslie Kanthan , Lingbo Li , Baowen Xu

HyperParameter Optimization (HPO) aims at finding the best HyperParameters (HPs) of learning models, such as neural networks, in the fastest and most efficient way possible. Most recent HPO algorithms try to optimize HPs regardless of the…

Machine Learning · Computer Science 2023-04-11 Antoine Scardigli , Paul Fournier , Matteo Vilucchio , David Naccache

Traditional risk factors like beta, size/value, and momentum often lag behind market dynamics in measuring and predicting stock return volatility. Statistical models like PCA and factor analysis fail to capture hidden nonlinear…

Computational Engineering, Finance, and Science · Computer Science 2025-09-23 Wenyan Xu , Jiayu Chen , Dawei Xiang , Chen Li , Yonghong Hu , Zhonghua Lu

Parameter-efficient fine-tuning (PEFT) has shown its effectiveness in adapting the pre-trained language models to downstream tasks while only updating a small number of parameters. Despite the success, most existing methods independently…

Computation and Language · Computer Science 2023-11-14 Hao Zhao , Jie Fu , Zhaofeng He

Experts in machine learning leverage domain knowledge to navigate decisions in model selection, hyperparameter optimization, and resource allocation. This is particularly critical for fine-tuning language models (LMs), where repeated trials…

Computation and Language · Computer Science 2025-10-07 Ernesto L. Estevanell-Valladares , Suilan Estevez-Velarde , Yoan Gutiérrez , Andrés Montoyo , Ruslan Mitkov

The rising popularity of large foundation models has led to a heightened demand for parameter-efficient fine-tuning methods, such as Low-Rank Adaptation (LoRA), which offer performance comparable to full model fine-tuning while requiring…

Computer Vision and Pattern Recognition · Computer Science 2025-02-05 Farzad Farhadzadeh , Debasmit Das , Shubhankar Borse , Fatih Porikli

At the forefront of state-of-the-art human alignment methods are preference optimization methods (*PO). Prior research has often concentrated on identifying the best-performing method, typically involving a grid search over hyperparameters,…

Computation and Language · Computer Science 2025-04-30 Kian Ahrabian , Xihui Lin , Barun Patra , Vishrav Chaudhary , Alon Benhaim , Jay Pujara , Xia Song

Recent years, Pre-trained Language models (PLMs) have swept into various fields of artificial intelligence and achieved great success. However, most PLMs, such as T5 and GPT3, have a huge amount of parameters, fine-tuning them is often…

Machine Learning · Computer Science 2024-07-17 Yuyan Chen , Qiang Fu , Ge Fan , Lun Du , Jian-Guang Lou , Shi Han , Dongmei Zhang , Zhixu Li , Yanghua Xiao

We address the challenge of optimizing meta-parameters (hyperparameters) in machine learning, a key factor for efficient training and high model performance. Rather than relying on expensive meta-parameter search methods, we introduce…

Machine Learning · Computer Science 2025-07-10 Arsalan Sharifnassab , Saber Salehkaleybar , Richard Sutton

The increasing capabilities of Machine Learning (ML) models go hand in hand with an immense amount of data and computational power required for training. Therefore, training is usually outsourced into HPC facilities, where we have started…

Machine Learning · Computer Science 2025-01-28 Sabrina Herbst , Vincenzo De Maio , Ivona Brandic

Despite the success, the process of fine-tuning large-scale PLMs brings prohibitive adaptation costs. In fact, fine-tuning all the parameters of a colossal model and retaining separate instances for different tasks are practically…

Hyperparameter optimization (HPO) is a key component of machine learning models for achieving peak predictive performance. While numerous methods and algorithms for HPO have been proposed over the last years, little progress has been made…

Large Language Models (LLMs) rely on Human Preference Alignment (HPA) to ensure the generation of safe content. Due to the heavy cost associated with fine-tuning, fine-tuning-free methods have emerged, typically modifying LLM decoding with…

Computation and Language · Computer Science 2024-02-15 Feifan Song , Yuxuan Fan , Xin Zhang , Peiyi Wang , Houfeng Wang

It is well known that evolutionary algorithms (EAs) achieve peak performance only when their parameters are suitably tuned to the given problem. Even more, it is known that the best parameter values can change during the optimization…

Neural and Evolutionary Computing · Computer Science 2020-06-22 Arina Buzdalova , Carola Doerr , Anna Rodionova

Parameter-efficient fine-tuning (PEFT) has emerged as a powerful paradigm for adapting large-scale pre-trained models to downstream tasks with minimal additional parameters. Among PEFT methods, Low-Rank Adaptation (LoRA) stands out for its…

Machine Learning · Computer Science 2026-02-03 Nghiem T. Diep , Dung Le , Tuan Truong , Tan Dinh , Huy Nguyen , Nhat Ho

Although the advancements of pre-trained Large Language Models have significantly accelerated recent progress in NLP, their ever-increasing size poses significant challenges for conventional fine-tuning, especially in memory-intensive…

Computation and Language · Computer Science 2024-04-02 Chenxi Whitehouse , Fantine Huot , Jasmijn Bastings , Mostafa Dehghani , Chu-Cheng Lin , Mirella Lapata

High-dimensional measurements are often correlated which motivates their approximation by factor models. This holds also true when features are engineered via low-dimensional interactions or kernel tricks. This often results in over…

Applications · Statistics 2025-09-03 Xiaonan Zhu , Bingyan Wang , Jianqing Fan