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Alignment of large language models (LLMs) involves training models on preference-contrastive output pairs to adjust their responses according to human preferences. To obtain such contrastive pairs, traditional methods like RLHF and RLAIF…

计算与语言 · 计算机科学 2024-10-18 Zekun Moore Wang , Shawn Wang , Kang Zhu , Jiaheng Liu , Ke Xu , Jie Fu , Wangchunshu Zhou , Wenhao Huang

Reinforcement learning from human feedback (RLHF) is a recent technique to improve the quality of the text generated by a language model, making it closer to what humans would generate. A core ingredient in RLHF's success in aligning and…

计算与语言 · 计算机科学 2024-07-08 Miguel Moura Ramos , Patrick Fernandes , António Farinhas , André F. T. Martins

Large language models (LLMs) exhibit enhanced capabilities in language understanding and generation. By utilizing their embedded knowledge, LLMs are increasingly used as conversational recommender systems (CRS), achieving improved…

信息检索 · 计算机科学 2026-04-14 Zhenrui Yue , Honglei Zhuang , Zhen Qin , Zhankui He , Huimin Zeng , Julian McAuley , Dong Wang

Large Language Models (LLMs) are known to overuse certain terms like "delve" and "intricate." The exact reasons for these lexical choices, however, have been unclear. Using Meta's Llama model, this study investigates the contribution of…

计算与语言 · 计算机科学 2025-08-05 Tom S. Juzek , Zina B. Ward

Personalized retrieval-augmented generation (RAG) aims to produce user-tailored responses by incorporating retrieved user profiles alongside the input query. Existing methods primarily focus on improving retrieval and rely on large language…

信息检索 · 计算机科学 2025-08-12 Kepu Zhang , Teng Shi , Weijie Yu , Jun Xu

Hallucination occurs when large language models exhibit behavior that deviates from the boundaries of their knowledge during response generation. To address this critical issue, previous learning-based methods attempt to finetune models but…

计算与语言 · 计算机科学 2025-05-27 Xueru Wen , Jie Lou , Xinyu Lu , Ji Yuqiu , Xinyan Guan , Yaojie Lu , Hongyu Lin , Ben He , Xianpei Han , Debing Zhang , Le Sun

The rapid development of large language models (LLMs) has not only provided numerous opportunities but also presented significant challenges. This becomes particularly evident when LLMs inadvertently generate harmful or toxic content,…

Recommender systems (RecSys) have become critical tools for enhancing user engagement by delivering personalized content across diverse digital platforms. Recent advancements in large language models (LLMs) demonstrate significant potential…

信息检索 · 计算机科学 2025-10-16 Yi Zhang , Lili Xie , Ruihong Qiu , Jiajun Liu , Sen Wang

We introduce a large language model (LLM) capable of processing speech inputs and show that tuning it further with reinforcement learning on human preference (RLHF) enables it to adapt better to disordered speech than traditional…

音频与语音处理 · 电气工程与系统科学 2025-01-03 Chirag Nagpal , Subhashini Venugopalan , Jimmy Tobin , Marilyn Ladewig , Katherine Heller , Katrin Tomanek

We propose Rec-R1, a general reinforcement learning framework that bridges large language models (LLMs) with recommendation systems through closed-loop optimization. Unlike prompting and supervised fine-tuning (SFT), Rec-R1 directly…

信息检索 · 计算机科学 2026-01-30 Jiacheng Lin , Tian Wang , Kun Qian

To advance capabilities of large language models (LLMs) in solving combinatorial optimization problems (COPs), this paper presents the Language-based Neural COP Solver (LNCS), a novel framework that is unified for the end-to-end resolution…

人工智能 · 计算机科学 2024-12-17 Xia Jiang , Yaoxin Wu , Yuan Wang , Yingqian Zhang

Large language models (LLMs) trained via pretraining and supervised fine-tuning (SFT) can still produce harmful and misaligned outputs, or struggle in domains like math and coding. Reinforcement learning (RL)-based post-training methods,…

Large Language Models (LLMs) acquire extensive knowledge and remarkable abilities from extensive text corpora, making them powerful tools for various applications. To make LLMs more usable, aligning them with human preferences is essential.…

计算与语言 · 计算机科学 2024-10-21 Mozhi Zhang , Pengyu Wang , Chenkun Tan , Mianqiu Huang , Dong Zhang , Yaqian Zhou , Xipeng Qiu

Medical image representations can be learned through medical vision-language contrastive learning (mVLCL) where medical imaging reports are used as weak supervision through image-text alignment. These learned image representations can be…

计算机视觉与模式识别 · 计算机科学 2025-02-10 Mingjian Li , Mingyuan Meng , Michael Fulham , David Dagan Feng , Lei Bi , Jinman Kim

The deployment of large language models (LLMs) faces considerable challenges concerning resource constraints and inference efficiency. Recent research has increasingly focused on smaller, task-specific models enhanced by distilling…

计算与语言 · 计算机科学 2024-09-20 Wei Wang , Zhaowei Li , Qi Xu , Yiqing Cai , Hang Song , Qi Qi , Ran Zhou , Zhida Huang , Tao Wang , Li Xiao

We introduce Language Feedback Models (LFMs) that identify desirable behaviour - actions that help achieve tasks specified in the instruction - for imitation learning in instruction following. To train LFMs, we obtain feedback from Large…

机器学习 · 计算机科学 2024-10-11 Victor Zhong , Dipendra Misra , Xingdi Yuan , Marc-Alexandre Côté

Positioned between pre-training and user deployment, aligning large language models (LLMs) through reinforcement learning (RL) has emerged as a prevailing strategy for training instruction following-models such as ChatGPT. In this work, we…

机器学习 · 计算机科学 2024-05-06 Fan Wu , Huseyin A. Inan , Arturs Backurs , Varun Chandrasekaran , Janardhan Kulkarni , Robert Sim

Fine-tuning Large Language Models (LLMs) adapts a trained model to specific downstream tasks, significantly improving task-specific performance. Supervised Fine-Tuning (SFT) is a common approach, where an LLM is trained to produce desired…

机器学习 · 计算机科学 2024-01-03 Qianxi Li , Yingyue Cao , Jikun Kang , Tianpei Yang , Xi Chen , Jun Jin , Matthew E. Taylor

We study the use of large language models (LLMs) for physics instrument design and compare their performance to reinforcement learning (RL). Using only prompting, LLMs are given task constraints and summaries of prior high-scoring designs…

仪器与探测器 · 物理学 2026-01-13 Sara Zoccheddu , Shah Rukh Qasim , Patrick Owen , Nicola Serra

Recent advances in large language models (LLMs) have demonstrated significant progress in performing complex tasks. While Reinforcement Learning from Human Feedback (RLHF) has been effective in aligning LLMs with human preferences, it is…

机器学习 · 计算机科学 2025-05-30 Chaoqi Wang , Zhuokai Zhao , Yibo Jiang , Zhaorun Chen , Chen Zhu , Yuxin Chen , Jiayi Liu , Lizhu Zhang , Xiangjun Fan , Hao Ma , Sinong Wang