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Many positional encodings (PEs) are designed to exhibit long-term decay, based on an entrenched and long-standing inductive opinion: tokens farther away from the current position carry less relevant information. We argue that long-term…

计算与语言 · 计算机科学 2024-12-06 Yuhan Chen , Ang Lv , Jian Luan , Bin Wang , Wei Liu

The long-context capability of the Large Language Models (LLM) has made significant breakthroughs, but the maximum supported context length in length extrapolation remains a critical bottleneck limiting their practical applications. The…

计算与语言 · 计算机科学 2025-03-20 Xiaoran Liu , Ruixiao Li , Qipeng Guo , Zhigeng Liu , Yuerong Song , Kai Lv , Hang Yan , Linlin Li , Qun Liu , Xipeng Qiu

Large Language Models (LLMs) have demonstrated remarkable capabilities through pretraining and alignment. However, superior short-context LLMs may underperform in long-context scenarios due to insufficient long-context alignment. This…

计算与语言 · 计算机科学 2025-03-04 Guanzheng Chen , Xin Li , Michael Qizhe Shieh , Lidong Bing

The capabilities of Large Language Models (LLMs) are limited to some extent by pre-training, so some researchers optimize LLMs through post-training. Existing post-training strategies, such as memory-based retrieval or preference…

计算与语言 · 计算机科学 2025-07-22 Haoran Sun , Zekun Zhang , Shaoning Zeng

Large language models (LLMs) are in need of sufficient contexts to handle many critical applications, such as retrieval augmented generation and few-shot learning. However, due to the constrained window size, the LLMs can only access to the…

计算与语言 · 计算机科学 2024-01-17 Ninglu Shao , Shitao Xiao , Zheng Liu , Peitian Zhang

Diffusion transformers (DiTs) struggle to generate images at resolutions higher than their training resolutions. The primary obstacle is that the explicit positional encodings(PE), such as RoPE, need extrapolating to unseen positions which…

计算机视觉与模式识别 · 计算机科学 2025-09-25 Shen Zhang , Siyuan Liang , Yaning Tan , Zhaowei Chen , Linze Li , Ge Wu , Yuhao Chen , Shuheng Li , Zhenyu Zhao , Caihua Chen , Jiajun Liang , Yao Tang

Rotary Position Embedding (RoPE) has shown strong performance in text-based Large Language Models (LLMs), but extending it to video remains a challenge due to the intricate spatiotemporal structure of video frames. Existing adaptations,…

人工智能 · 计算机科学 2025-11-03 Zikang Liu , Longteng Guo , Yepeng Tang , Tongtian Yue , Junxian Cai , Kai Ma , Qingbin Liu , Xi Chen , Jing Liu

Long-context capabilities are essential for a wide range of applications, including document and video understanding, in-context learning, and inference-time scaling, all of which require models to process and reason over long sequences of…

计算与语言 · 计算机科学 2025-04-09 Chejian Xu , Wei Ping , Peng Xu , Zihan Liu , Boxin Wang , Mohammad Shoeybi , Bo Li , Bryan Catanzaro

Rotary Position Embeddings (RoPE) have become a standard for encoding sequence order in Large Language Models (LLMs) by applying rotations to query and key vectors in the complex plane. Standard implementations, however, utilize only the…

计算与语言 · 计算机科学 2025-12-09 Xiaoran Liu , Yuerong Song , Zhigeng Liu , Zengfeng Huang , Qipeng Guo , Zhaoxiang Liu , Shiguo Lian , Ziwei He , Xipeng Qiu

Although large language models (LLMs) have achieved significant progress in handling long-context inputs, they still suffer from the ``lost-in-the-middle'' problem, where crucial information in the middle of the context is often…

计算与语言 · 计算机科学 2025-03-07 Zhenghua Wang , Yiran Ding , Changze Lv , Zhibo Xu , Tianlong Li , Tianyuan Shi , Xiaoqing Zheng , Xuanjing Huang

Large language models (LLMs) exhibit complementary strengths in various tasks, motivating the research of LLM ensembling. However, existing work focuses on training an extra reward model or fusion model to select or combine all candidate…

计算与语言 · 计算机科学 2024-05-31 Yichong Huang , Xiaocheng Feng , Baohang Li , Yang Xiang , Hui Wang , Bing Qin , Ting Liu

Ensembling large language models (LLMs) can effectively combine diverse strengths of different models, offering a promising approach to enhance performance across various tasks. However, existing methods typically rely on fixed weighting…

机器学习 · 计算机科学 2025-06-03 Yuqian Fu , Yuanheng Zhu , Jiajun Chai , Guojun Yin , Wei Lin , Qichao Zhang , Dongbin Zhao

Due to the large number of parameters, the inference phase of Large Language Models (LLMs) is resource-intensive. Unlike traditional model compression, which needs retraining, recent dynamic computation methods show that not all components…

计算与语言 · 计算机科学 2025-11-27 Siqi Fan , Xuezhi Fang , Xingrun Xing , Peng Han , Shuo Shang , Yequan Wang

Deep Contextual Language Models (LMs) like ELMO, BERT, and their successors dominate the landscape of Natural Language Processing due to their ability to scale across multiple tasks rapidly by pre-training a single model, followed by…

计算与语言 · 计算机科学 2021-12-21 Shaily Bhatt , Poonam Goyal , Sandipan Dandapat , Monojit Choudhury , Sunayana Sitaram

This paper aims to overcome the "lost-in-the-middle" challenge of large language models (LLMs). While recent advancements have successfully enabled LLMs to perform stable language modeling with up to 4 million tokens, the persistent…

计算与语言 · 计算机科学 2024-03-11 Zhenyu Zhang , Runjin Chen , Shiwei Liu , Zhewei Yao , Olatunji Ruwase , Beidi Chen , Xiaoxia Wu , Zhangyang Wang

We explore whether Large Language Models (LLMs) are capable of logical reasoning with distorted facts, which we call Deduction under Perturbed Evidence (DUPE). DUPE presents a unique challenge to LLMs since they typically rely on their…

计算与语言 · 计算机科学 2023-05-25 Shashank Sonkar , Richard G. Baraniuk

Extending the context window of large language models (LLMs) is getting popular recently, while the solution of augmenting LLMs with retrieval has existed for years. The natural questions are: i) Retrieval-augmentation versus long context…

Transformers often struggle to generalize to longer sequences than those seen during training, a limitation known as length extrapolation. Most existing Relative Positional Encoding (RPE) methods attempt to address this by introducing…

计算与语言 · 计算机科学 2025-09-23 Ali Veisi , Hamidreza Amirzadeh , Amir Mansourian

Multimodal large language models (MLLMs) have demonstrated impressive performance in various vision-language (VL) tasks, but their expensive computations still limit the real-world application. To address this issue, recent efforts aim to…

计算机视觉与模式识别 · 计算机科学 2026-02-05 Hao Ai , Kunyi Wang , Zezhou Wang , Hao Lu , Jin Tian , Yaxin Luo , Peng Xing , Jen-Yuan Huang , Huaxia Li , Gen luo

The adoption of long context windows has become a standard feature in Large Language Models (LLMs), as extended contexts significantly enhance their capacity for complex reasoning and broaden their applicability across diverse scenarios.…

计算与语言 · 计算机科学 2026-05-20 Wenxuan Li , Chengruidong Zhang , Huiqiang Jiang , Yucheng Li , Yuqing Yang , Lili Qiu