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A key challenge of multi-hop question answering (QA) in the open-domain setting is to accurately retrieve the supporting passages from a large corpus. Existing work on open-domain QA typically relies on off-the-shelf information retrieval…

计算与语言 · 计算机科学 2019-11-05 Wenhan Xiong , Mo Yu , Xiaoxiao Guo , Hong Wang , Shiyu Chang , Murray Campbell , William Yang Wang

Graph Retrieval-Augmented Generation (GraphRAG) has proven highly effective in enhancing the performance of Large Language Models (LLMs) on tasks that require external knowledge. By leveraging Knowledge Graphs (KGs), GraphRAG improves…

人工智能 · 计算机科学 2025-11-06 Ruiyi Yang , Hao Xue , Imran Razzak , Hakim Hacid , Flora D. Salim

Multi-hop question answering (QA) necessitates multi-step reasoning and retrieval across interconnected subjects, attributes, and relations. Existing retrieval-augmented generation (RAG) methods struggle to capture these structural…

计算与语言 · 计算机科学 2026-02-19 Jimeng Shi , Wei Hu , Runchu Tian , Bowen Jin , Wonbin Kweon , SeongKu Kang , Yunfan Kang , Dingqi Ye , Sizhe Zhou , Shaowen Wang , Jiawei Han

Multi-Hop Question Answering (MHQA) tasks permeate real-world applications, posing challenges in orchestrating multi-step reasoning across diverse knowledge domains. While existing approaches have been improved with iterative retrieval,…

机器学习 · 计算机科学 2025-10-06 Rong Cheng , Jinyi Liu , Yan Zheng , Fei Ni , Jiazhen Du , Hangyu Mao , Fuzheng Zhang , Bo Wang , Jianye Hao

Retrieval-Augmented Generation (RAG) grounds language models in external evidence, but multi-hop question answering remains difficult because iterative pipelines must control what to retrieve next and when the available evidence is…

信息检索 · 计算机科学 2026-04-28 Minghan Li , Junjie Zou , Xinxuan Lv , Chao Zhang , Guodong Zhou

Since large language models (LLMs) have a tendency to generate factually inaccurate output, retrieval-augmented generation (RAG) has gained significant attention as a key means to mitigate this downside of harnessing only LLMs. However,…

计算与语言 · 计算机科学 2025-12-18 Youmin Ko , Sungjong Seo , Hyunjoon Kim

Retrieval-augmented generation (RAG) enhances large language models with external knowledge, and tree-based RAG organizes documents into hierarchical indexes to support queries at multiple granularities. However, existing Tree-RAG methods…

机器学习 · 计算机科学 2026-05-04 Ziwen Zhao , Menglin Yang

Multi-hop Question Answering (QA) necessitates complex reasoning by integrating multiple pieces of information to resolve intricate questions. However, existing QA systems encounter challenges such as outdated information, context window…

计算与语言 · 计算机科学 2024-08-23 Xiaoming Zhang , Ming Wang , Xiaocui Yang , Daling Wang , Shi Feng , Yifei Zhang

Retrieval-augmented generation (RAG) has shown promising potential in knowledge intensive question answering (QA). However, existing approaches only consider the query itself, neither specifying the retrieval preferences for the retrievers…

信息检索 · 计算机科学 2025-02-18 Zhongwu Chen , Chengjin Xu , Dingmin Wang , Zhen Huang , Yong Dou , Xuhui Jiang , Jian Guo

This work deals with the challenge of learning and reasoning over multi-modal multi-hop question answering (QA). We propose a graph reasoning network based on the semantic structure of the sentences to learn multi-source reasoning paths and…

计算与语言 · 计算机科学 2025-01-09 Navya Yarrabelly , Saloni Mittal

Retrieval-Augmented Generation (RAG) has emerged as a promising approach to address key limitations of Large Language Models (LLMs), such as hallucination, outdated knowledge, and lacking reference. However, current RAG frameworks often…

信息检索 · 计算机科学 2025-09-17 Zihan Wang , Zihan Liang , Zhou Shao , Yufei Ma , Huangyu Dai , Ben Chen , Lingtao Mao , Chenyi Lei , Yuqing Ding , Han Li

Despite the strong language understanding abilities of large language models (LLMs), they still struggle with reliable question answering (QA) over long, structured documents, particularly for numerical reasoning. Financial annual reports…

计算与语言 · 计算机科学 2026-04-07 Yi-Cheng Wang , Wei-An Wang , Chu-Song Chen

Retrieval-Augmented Generation (RAG) integrates non-parametric knowledge into Large Language Models (LLMs), typically from unstructured texts and structured graphs. While recent progress has advanced text-based RAG to multi-turn reasoning…

计算与语言 · 计算机科学 2025-12-11 Yucan Guo , Miao Su , Saiping Guan , Zihao Sun , Xiaolong Jin , Jiafeng Guo , Xueqi Cheng

Retrieval-augmented generation (RAG) methods encounter difficulties when addressing complex questions like multi-hop queries. While iterative retrieval methods improve performance by gathering additional information, current approaches…

Large Reasoning Models (LRMs) exhibit remarkable reasoning abilities but rely primarily on parametric knowledge, limiting factual accuracy. While recent works equip reinforcement learning (RL)-based LRMs with retrieval capabilities, they…

计算与语言 · 计算机科学 2025-05-20 Zhicheng Lee , Shulin Cao , Jinxin Liu , Jiajie Zhang , Weichuan Liu , Xiaoyin Che , Lei Hou , Juanzi Li

Retrieval-augmented generation (RAG) enables large language models (LLMs) to dynamically access external information, which is powerful for answering questions over previously unseen documents. Nonetheless, they struggle with high-level…

人工智能 · 计算机科学 2026-04-21 Chi-Hsiang Hsiao , Yi-Cheng Wang , Tzung-Sheng Lin , Yi-Ren Yeh , Chu-Song Chen

Retrieval-augmented generation (RAG) has rapidly advanced the language model field, particularly in question-answering (QA) systems. By integrating external documents during the response generation phase, RAG significantly enhances the…

计算与语言 · 计算机科学 2024-09-25 Xinyue Chen , Pengyu Gao , Jiangjiang Song , Xiaoyang Tan

Retrieval-augmented generation (RAG) equips large language models (LLMs) with reliable knowledge memory. To strengthen cross-text associations, recent research integrates graphs and hypergraphs into RAG to capture pairwise and multi-entity…

信息检索 · 计算机科学 2026-02-10 Xingliang Hou , Yuyan Liu , Qi Sun , haoxiu wang , Hao Hu , Shaoyi Du , Zhiqiang Tian

Traditional Retrieval-Augmented Generation (RAG) effectively supports single-hop question answering with large language models but faces significant limitations in multi-hop question answering tasks, which require combining evidence from…

计算与语言 · 计算机科学 2026-05-26 Junli Liang , Pengfei Zhou , Wangqiu Zhou , Wenjie Qing , Qi Zhao , Ziwen Wang , Qi Song , Xiangyang Li

Retrieval-Augmented Generation (RAG) has emerged as a promising technique to enhance the quality and relevance of responses generated by large language models. While recent advancements have mainly focused on improving RAG for text-based…

计算与语言 · 计算机科学 2025-09-30 Ainulla Khan , Yamada Moyuru , Srinidhi Akella