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The growing demand for effective tools to parse PDF-formatted texts, particularly structured documents such as textbooks, reveals the limitations of current methods developed mainly for research paper segmentation. This work addresses the…

Information Retrieval · Computer Science 2025-09-03 Sabine Wehnert , Harikrishnan Changaramkulath , Ernesto William De Luca

Search engines often follow a two-phase paradigm where in the first stage (the retrieval stage) an initial set of documents is retrieved and in the second stage (the re-ranking stage) the documents are re-ranked to obtain the final result…

Information Retrieval · Computer Science 2020-10-06 Saar Kuzi , Mingyang Zhang , Cheng Li , Michael Bendersky , Marc Najork

Iterative Retrieval-Augmented Generation (iRAG) has emerged as a powerful paradigm for answering complex multi-hop questions by progressively retrieving and reasoning over external documents. However, current systems predominantly operate…

Computer Vision and Pattern Recognition · Computer Science 2026-05-26 Peiyang Liu , Ziqiang Cui , Xi Wang , Di Liang , Wei Ye

In book search, relevant book information should be returned in response to a query. Books contain complex, multi-faceted information such as metadata, outlines, and main text, where the outline provides hierarchical information between…

Information Retrieval · Computer Science 2025-01-22 Yubao Tang , Ruqing Zhang , Jiafeng Guo , Maarten de Rijke , Shihao Liu , Shuaiqing Wang , Dawei Yin , Xueqi Cheng

Retrieval-augmented generation (RAG) improves large language model reliability by grounding generated responses in external evidence. However, RAG performance depends on the relevance of retrieved passages, the quality of evidence ranking,…

Information Retrieval · Computer Science 2026-05-05 Fariba Afrin Irany , Sampson Akwafuo

Document Visual Question Answering (Document VQA) must cope with documents that span dozens of pages, yet leading systems still concatenate every page or rely on very large vision-language models, both of which are memory-hungry.…

Computer Vision and Pattern Recognition · Computer Science 2025-08-29 Eric López , Artemis Llabrés , Ernest Valveny

Retrieval-Augmented Generation (RAG) has recently demonstrated the performance of Large Language Models (LLMs) in the knowledge-intensive tasks such as Question-Answering (QA). RAG expands the query context by incorporating external…

Machine Learning · Computer Science 2024-06-18 Zijian Hei , Weiling Liu , Wenjie Ou , Juyi Qiao , Junming Jiao , Guowen Song , Ting Tian , Yi Lin

We present the DEREK (Deep Extraction & Reasoning Engine for Knowledge) Module, a secure and scalable Retrieval-Augmented Generation pipeline designed specifically for enterprise document question answering. Designed and implemented by…

Computation and Language · Computer Science 2025-07-23 Isaac Shi , Zeyuan Li , Fan Liu , Wenli Wang , Lewei He , Yang Yang , Tianyu Shi

Retrieval-augmented generation (RAG) can supplement large language models (LLMs) by integrating external knowledge. However, as the number of retrieved documents increases, the input length to LLMs grows linearly, causing a dramatic…

Computation and Language · Computer Science 2025-02-18 Yuankai Li , Jia-Chen Gu , Di Wu , Kai-Wei Chang , Nanyun Peng

Continual Learning models aim to learn a set of tasks under the constraint that the tasks arrive sequentially with no way to access data from previous tasks. The Online Continual Learning framework poses a further challenge where the tasks…

Machine Learning · Computer Science 2024-12-24 Kevin Luong , Michael Thielscher

Retrieval-Augmented Generation (RAG) encounters efficiency challenges when scaling to massive knowledge bases while preserving contextual relevance. We propose Hash-RAG, a framework that integrates deep hashing techniques with systematic…

Information Retrieval · Computer Science 2025-06-04 Jinyu Guo , Xunlei Chen , Qiyang Xia , Zhaokun Wang , Jie Ou , Libo Qin , Shunyu Yao , Wenhong Tian

Retrieval-augmented generation (RAG) offers an effective approach for addressing question answering (QA) tasks. However, the imperfections of the retrievers in RAG models often result in the retrieval of irrelevant information, which could…

Computation and Language · Computer Science 2024-06-18 Jinyuan Fang , Zaiqiao Meng , Craig Macdonald

Researchers produce thousands of scholarly documents containing valuable technical knowledge. The community faces the laborious task of reading these documents to identify, extract, and synthesize information. To automate information…

Computation and Language · Computer Science 2023-12-13 Tavish McDonald , Brian Tsan , Amar Saini , Juanita Ordonez , Luis Gutierrez , Phan Nguyen , Blake Mason , Brenda Ng

As an effective method to boost the performance of Large Language Models (LLMs) on the question answering (QA) task, Retrieval-Augmented Generation (RAG), which queries highly relevant information from external complex documents, has…

Information Retrieval · Computer Science 2025-12-04 Shu Wang , Yingli Zhou , Yixiang Fang

While dense retrieval has been shown effective and efficient across tasks and languages, it remains difficult to create effective fully zero-shot dense retrieval systems when no relevance label is available. In this paper, we recognize the…

Information Retrieval · Computer Science 2022-12-21 Luyu Gao , Xueguang Ma , Jimmy Lin , Jamie Callan

Speculative decoding (SD) has emerged as an effective technique to accelerate large language model (LLM) inference without compromising output quality. However, the achievable speedup largely depends on the effectiveness of the drafting…

Computation and Language · Computer Science 2025-11-04 Min Fang , Zhihui Fu , Qibin Zhao , Jun Wang

Retrieval-Augmented Generation (RAG) has demonstrated considerable effectiveness in open-domain question answering. However, when applied to heterogeneous documents, comprising both textual and tabular components, existing RAG approaches…

Computation and Language · Computer Science 2025-10-01 Xiaohan Yu , Pu Jian , Chong Chen

This paper challenges a cross-genre document retrieval task, where the queries are in formal writing and the target documents are in conversational writing. In this task, a query, is a sentence extracted from either a summary or a plot of…

Computation and Language · Computer Science 2017-07-17 Tomasz Jurczyk , Jinho D. Choi

Long document retrieval aims to fetch query-relevant documents from a large-scale collection, where knowledge distillation has become de facto to improve a retriever by mimicking a heterogeneous yet powerful cross-encoder. However, in…

Information Retrieval · Computer Science 2022-12-21 Yucheng Zhou , Tao Shen , Xiubo Geng , Chongyang Tao , Guodong Long , Can Xu , Daxin Jiang

The work of neural retrieval so far focuses on ranking short texts and is challenged with long documents. There are many cases where the users want to find a relevant passage within a long document from a huge corpus, e.g. Wikipedia…

Information Retrieval · Computer Science 2024-06-11 Kexin Wang , Nils Reimers , Iryna Gurevych