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The prevalent use of Byte Pair Encoding (BPE) in Large Language Models (LLMs) facilitates robust handling of subword units and avoids issues of out-of-vocabulary words. Despite its success, a critical challenge persists: long tokens, rich…

计算与语言 · 计算机科学 2024-11-11 Haoran Lian , Yizhe Xiong , Zijia Lin , Jianwei Niu , Shasha Mo , Hui Chen , Peng Liu , Guiguang Ding

Large language models encode impressively broad world knowledge in their parameters. However, the knowledge in static language models falls out of date, limiting the model's effective "shelf life." While online fine-tuning can reduce this…

计算与语言 · 计算机科学 2023-10-24 Nathan Hu , Eric Mitchell , Christopher D. Manning , Chelsea Finn

Reinforcement learning (RL) has become a cornerstone for enhancing the reasoning capabilities of large language models (LLMs), with recent innovations such as Group Relative Policy Optimization (GRPO) demonstrating exceptional…

计算与语言 · 计算机科学 2025-05-20 Zhihe Yang , Xufang Luo , Zilong Wang , Dongqi Han , Zhiyuan He , Dongsheng Li , Yunjian Xu

Knowledge Editing (KE) aims to adjust a Large Language Model's (LLM) internal representations and parameters to correct inaccuracies and improve output consistency without incurring the computational expense of re-training the entire model.…

计算与语言 · 计算机科学 2025-05-29 Liyu Zhang , Weiqi Wang , Tianqing Fang , Yangqiu Song

While large language models (LLMs) are extensively used, there are raising concerns regarding privacy, security, and copyright due to their opaque training data, which brings the problem of detecting pre-training data on the table. Current…

计算与语言 · 计算机科学 2024-08-01 Anqi Zhang , Chaofeng Wu

Token-level attention tuning, a class of training-free methods including Post-hoc Attention Steering (PASTA) and Attention Calibration (ACT), has emerged as a promising approach for improving frozen LLMs via interpretable interventions.…

计算与语言 · 计算机科学 2026-02-12 Feijiang Han , Xiaodong Yu , Jianheng Tang , Delip Rao , Weihua Du , Lyle Ungar

Multi-modal Large Language Models (MLLMs) integrate visual and linguistic reasoning to address complex tasks such as image captioning and visual question answering. While MLLMs demonstrate remarkable versatility, MLLMs appears limited…

Hyperparameter optimization (HPO) aims to identify an optimal hyperparameter configuration (HPC) such that the resulting model generalizes well to unseen data. As the expected generalization error cannot be optimized directly, it is…

机器学习 · 计算机科学 2025-06-25 Lennart Schneider , Bernd Bischl , Matthias Feurer

Muon has recently shown promising results in LLM training. In this work, we study how to further improve Muon. We argue that Muon's orthogonalized update rule suppresses the emergence of heavy-tailed weight spectra and over-emphasizes the…

机器学习 · 计算机科学 2026-05-25 Tianyu Pang , Yujie Fang , Zihang Liu , Shenyang Deng , Lei Hsiung , Shuhua Yu , Yaoqing Yang

Different from existing federated fine-tuning (FFT) methods for foundation models, hybrid heterogeneous federated fine-tuning (HHFFT) is an under-explored scenario where clients exhibit double heterogeneity in model architectures and…

机器学习 · 计算机科学 2025-08-01 Wei Guo , Siyuan Lu , Yiqi Tong , Zhaojun Hu , Fuzhen Zhuang , Xiao Zhang , Tao Fan , Jin Dong

Multilingual large language models (LLMs) often exhibit language confusion, a tendency to generate responses in a dominant language irrespective of the prompt's language. To address this, we propose Smoothie-Qwen, a lightweight, post-hoc…

计算与语言 · 计算机科学 2025-07-09 SeungWon Ji , Jungyup Lee , Jemin Kim , Sang Park , SeungJae Lee

Autoformalization, the process of transforming informal mathematical language into formal specifications and proofs remains a difficult task for state-of-the-art (large) language models. Existing works point to competing explanations for…

Editing human-written text has become a standard use case of large language models (LLMs), for example, to make one's arguments more appropriate for a discussion. Comparing human to LLM-generated edits, however, we observe a mismatch in…

计算与语言 · 计算机科学 2026-04-15 Timon Ziegenbein , Maja Stahl , Henning Wachsmuth

Recent studies have shown that combining parameter-efficient fine-tuning (PEFT) with mixture-of-experts (MoE) is an effective strategy for adapting large language models (LLMs) to the downstream tasks. However, most existing approaches rely…

计算与语言 · 计算机科学 2026-02-25 Yuan Zhuang , Yi Shen , Yuexin Bian , Qing Su , Shihao Ji , Yuanyuan Shi , Fei Miao

Large language models (LLMs) can effectively handle outdated information through knowledge editing. However, current approaches face two key limitations: (I) Poor generalization: Most approaches rigidly inject new knowledge without ensuring…

计算与语言 · 计算机科学 2026-04-08 Jinhu Fu , Yan Bai , Longzhu He , Yihang Lou , Yanxiao Zhao , Li Sun , Sen Su

Despite their success at many natural language processing (NLP) tasks, large language models still struggle to effectively leverage knowledge for knowledge-intensive tasks, manifesting limitations such as generating incomplete, non-factual,…

计算与语言 · 计算机科学 2024-10-03 Yougang Lyu , Lingyong Yan , Shuaiqiang Wang , Haibo Shi , Dawei Yin , Pengjie Ren , Zhumin Chen , Maarten de Rijke , Zhaochun Ren

Aligning text-to-speech (TTS) system outputs with human feedback through preference optimization has been shown to effectively improve the robustness and naturalness of language model-based TTS models. Current approaches primarily require…

计算与语言 · 计算机科学 2026-04-28 Rikuto Kotoge , Yuichi Sasaki

Fine-tuning large language models (LLMs) on custom datasets has become a standard approach for adapting these models to specific domains and applications. However, recent studies have shown that such fine-tuning can lead to significant…

计算与语言 · 计算机科学 2026-03-03 Yanping Li , Zhening Liu , Zijian Li , Zehong Lin , Jun Zhang

This paper introduces a simple and scalable approach to improve the data efficiency of large language model (LLM) training by augmenting existing text data with thinking trajectories. The compute for pre-training LLMs has been growing at an…

计算与语言 · 计算机科学 2025-10-20 Liang Wang , Nan Yang , Shaohan Huang , Li Dong , Furu Wei

While supervised fine-tuning (SFT) has been a straightforward approach for tailoring the output of foundation large language model (LLM) to specific preferences, concerns have been raised about the depth of this alignment, with some…

计算与语言 · 计算机科学 2024-04-26 Runzhe Zhan , Xinyi Yang , Derek F. Wong , Lidia S. Chao , Yue Zhang