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Retrieval-augmented generation (RAG) is key to enhancing large language models (LLMs) to systematically access richer factual knowledge. Yet, using RAG brings intrinsic challenges, as LLMs must deal with potentially conflicting knowledge,…

Computation and Language · Computer Science 2025-04-08 Leonardo Ranaldi , Federico Ranaldi , Fabio Massimo Zanzotto , Barry Haddow , Alexandra Birch

Large Language Models (LLMs) possess human-level cognitive and decision-making capabilities, making them a key technology for 6G. However, applying LLMs to the communication domain faces three major challenges: 1) Inadequate communication…

Information Theory · Computer Science 2025-02-27 Feibo Jiang , Wanyun Zhu , Li Dong , Kezhi Wang , Kun Yang , Cunhua Pan , Octavia A. Dobre

Large language models (LLMs) have significantly advanced various natural language processing (NLP) tasks. Recent research indicates that moderately-sized LLMs often outperform larger ones after task-specific fine-tuning. This study focuses…

Computation and Language · Computer Science 2024-10-14 Minghao Wu , Thuy-Trang Vu , Lizhen Qu , George Foster , Gholamreza Haffari

RAG-based QA has emerged as a powerful method for processing long industrial documents. However, conventional text chunking approaches often neglect complex and long industrial document structures, causing information loss and reduced…

Artificial Intelligence · Computer Science 2026-04-15 Joongmin Shin , Chanjun Park , Jeongbae Park , Jaehyung Seo , Heuiseok Lim

Recent proprietary large language models (LLMs), such as GPT-4, have achieved a milestone in tackling diverse challenges in the biomedical domain, ranging from multiple-choice questions to long-form generations. To address challenges that…

Computation and Language · Computer Science 2024-06-19 Minbyul Jeong , Jiwoong Sohn , Mujeen Sung , Jaewoo Kang

Retrieval-Augmented Generation (RAG) has become a core paradigm in document question answering tasks. However, existing methods have limitations when dealing with multimodal documents: one category of methods relies on layout analysis and…

Computation and Language · Computer Science 2026-03-09 Wang Chen , Wenhan Yu , Guanqiang Qi , Weikang Li , Yang Li , Lei Sha , Deguo Xia , Jizhou Huang

Existing Multimodal Large Language Models (MLLMs) suffer from significant performance degradation on the long document understanding task as document length increases. This stems from two fundamental challenges: 1) a low Signal-to-Noise…

Artificial Intelligence · Computer Science 2026-05-12 Hao Yan , Yuliang Liu , Xingchen Liu , Yuyi Zhang , Minghui Liao , Jihao Wu , Wei Chen , Xiang Bai

Document understanding with multimodal large language models (MLLMs) requires not only accurate answers but also explicit, evidence-grounded reasoning, especially in high-stakes scenarios. However, current document MLLMs still fall short of…

Computer Vision and Pattern Recognition · Computer Science 2026-03-10 Yuchuan Wu , Minghan Zhuo , Teng Fu , Mengyang Zhao , Bin Li , Xiangyang Xue

This paper presents an advancement in Question-Answering (QA) systems using a Retrieval Augmented Generation (RAG) framework to enhance information extraction from PDF files. Recognizing the richness and diversity of data within…

Computation and Language · Computer Science 2026-04-08 Thi Thu Uyen Hoang , Meenakshi Rajendran , Kun Zhang , Yuhan Wu , Viet Anh Nguyen

The proliferation of multimodal Large Language Models has significantly advanced the ability to analyze and understand complex data inputs from different modalities. However, the processing of long documents remains under-explored, largely…

Computer Vision and Pattern Recognition · Computer Science 2025-08-06 Goeric Huybrechts , Srikanth Ronanki , Sai Muralidhar Jayanthi , Jack Fitzgerald , Srinivasan Veeravanallur

Question answering over visually rich documents (VRDs) requires reasoning not only over isolated content but also over documents' structural organization and cross-page dependencies. However, conventional retrieval-augmented generation…

Computation and Language · Computer Science 2026-03-03 Zhivar Sourati , Zheng Wang , Marianne Menglin Liu , Yazhe Hu , Mengqing Guo , Sujeeth Bharadwaj , Kyu Han , Tao Sheng , Sujith Ravi , Morteza Dehghani , Dan Roth

Document AI has advanced rapidly and is attracting increasing attention. Yet, while most efforts have focused on document layout analysis (DLA), its generative counterpart, layout generation, remains underexplored. Distinct from traditional…

Computer Vision and Pattern Recognition · Computer Science 2025-11-25 Hengrui Kang , Zhuangcheng Gu , Zhiyuan Zhao , Zichen Wen , Bin Wang , Weijia Li , Conghui He

Document understanding in real-world applications often requires processing heterogeneous, multi-page document packets containing multiple documents stitched together. Despite recent advances in visual document understanding, the…

Retrieval-Augmented Generation (RAG) has been shown to enhance the factual accuracy of Large Language Models (LLMs), but existing methods often suffer from limited reasoning capabilities in effectively using the retrieved evidence,…

Computation and Language · Computer Science 2024-10-03 Shayekh Bin Islam , Md Asib Rahman , K S M Tozammel Hossain , Enamul Hoque , Shafiq Joty , Md Rizwan Parvez

Documents are fundamental to preserving and disseminating information, often incorporating complex layouts, tables, and charts that pose significant challenges for automatic document understanding (DU). While vision-language large models…

Computation and Language · Computer Science 2025-06-19 Negar Foroutan , Angelika Romanou , Matin Ansaripour , Julian Martin Eisenschlos , Karl Aberer , Rémi Lebret

We need to trust robots that use often opaque AI methods. They need to explain themselves to us, and we need to trust their explanation. In this regard, explainability plays a critical role in trustworthy autonomous decision-making to…

Robotics · Computer Science 2026-03-09 Jianhao Yuan , Shuyang Sun , Daniel Omeiza , Bo Zhao , Paul Newman , Lars Kunze , Matthew Gadd

Retrieval augmented generation (RAG) has been widely adopted to help Large Language Models (LLMs) to process tasks involving long documents. However, existing retrieval models are not designed for long document retrieval and fail to address…

Information Retrieval · Computer Science 2026-02-13 David Jiahao Fu , Lam Thanh Do , Jiayu Li , Kevin Chen-Chuan Chang

Retrieval-augmented generation (RAG) augments large language models (LLM) by retrieving relevant knowledge, showing promising potential in mitigating LLM hallucinations and enhancing response quality, thereby facilitating the great adoption…

Computation and Language · Computer Science 2024-01-30 Yixuan Tang , Yi Yang

We introduce a novel retrieval-augmented generation (RAG) framework tailored for multihop question answering. First, our system uses large language model (LLM) to decompose complex multihop questions into a sequence of single-hop…

Computation and Language · Computer Science 2025-08-14 Seokgi Lee

Recently, the strong text creation ability of Large Language Models(LLMs) has given rise to many tools for assisting paper reading or even writing. However, the weak diagram analysis abilities of LLMs or Multimodal LLMs greatly limit their…

Multimedia · Computer Science 2024-01-10 Anwen Hu , Yaya Shi , Haiyang Xu , Jiabo Ye , Qinghao Ye , Ming Yan , Chenliang Li , Qi Qian , Ji Zhang , Fei Huang