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Large language models (LLMs) are rapidly transforming various domains, including biomedicine and healthcare, and demonstrate remarkable potential from scientific research to new drug discovery. Graph-based retrieval-augmented generation…

Quantitative Methods · Quantitative Biology 2025-11-14 Guofeng Meng , Li Shen , Qiuyan Zhong , Wei Wang , Haizhou Zhang , Xiaozhen Wang

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…

Computation and Language · Computer Science 2026-05-26 Junli Liang , Pengfei Zhou , Wangqiu Zhou , Wenjie Qing , Qi Zhao , Ziwen Wang , Qi Song , Xiangyang Li

Large Language Models (LLMs) excel in language tasks but are prone to hallucinations and outdated knowledge. Retrieval-Augmented Generation (RAG) mitigates these by grounding LLMs in external knowledge. However, in complex domains involving…

Computation and Language · Computer Science 2025-08-28 Peiran Zhou , Junnan Zhu , Yichen Shen , Ruoxi Yu

Retrieval augmented generation (RAG) has enhanced large language models by enabling access to external knowledge, with graph-based RAG emerging as a powerful paradigm for structured retrieval and reasoning. However, existing graph-based…

Artificial Intelligence · Computer Science 2026-02-06 Nengbo Wang , Tuo Liang , Vikash Singh , Chaoda Song , Van Yang , Yu Yin , Jing Ma , Jagdip Singh , Vipin Chaudhary

Recent prompt-based text-to-speech (TTS) models can clone an unseen speaker using only a short speech prompt. They leverage a strong in-context ability to mimic the speech prompts, including speaker style, prosody, and emotion. Therefore,…

Sound · Computer Science 2024-06-07 Jinlong Xue , Yayue Deng , Yingming Gao , Ya Li

Retrieval-augmented generation (RAG) has emerged as a paradigm for grounding large language models in external knowledge, yet most existing RAG systems assume centralized knowledge access and ample computation. These assumptions break down…

Information Retrieval · Computer Science 2026-05-28 Tianhao Gao , Kai Yang , Yiyang Li

Retrieval-augmented generation (RAG) has improved large language models (LLMs) by using knowledge retrieval to overcome knowledge deficiencies. However, current RAG methods often fall short of ensuring the depth and completeness of…

Computation and Language · Computer Science 2025-02-11 Shengjie Ma , Chengjin Xu , Xuhui Jiang , Muzhi Li , Huaren Qu , Cehao Yang , Jiaxin Mao , Jian Guo

Recent investigations into effective context lengths of modern flagship large language models (LLMs) have revealed major limitations in effective question answering (QA) and reasoning over long and complex contexts for even the largest and…

Computation and Language · Computer Science 2025-10-28 Anwesan Pal , Karen Hovsepian , Tinghao Guo , Mengnan Zhao , Somendra Tripathi , Nikos Kanakaris , George Mihaila , Sumit Nigam

Retrieval-Augmented Generation (RAG) grounds large language models with external evidence, but many implementations rely on pre-built indices that remain static after construction. Related queries therefore repeat similar multi-hop…

Artificial Intelligence · Computer Science 2026-03-03 Yifan Wang , Mingxuan Jiang , Zhihao Sun , Yixin Cao , Yicun Liu , Keyang Chen , Guangnan Ye , Hongfeng Chai

Retrieval-augmented generation (RAG) systems have been widely adopted in contemporary large language models (LLMs) due to their ability to improve generation quality while reducing the required input context length. In this work, we focus…

Computation and Language · Computer Science 2026-04-07 Tianyi Zhang , Andreas Marfurt

Retrieval-Augmented Generation (RAG) enables large language models to provide more precise and pertinent responses by incorporating external knowledge. In the Query-Focused Summarization (QFS) task, GraphRAG-based approaches have notably…

Information Retrieval · Computer Science 2025-04-11 Yubin Hong , Chaofan Li , Jingyi Zhang , Yingxia Shao

Retrieval-Augmented Generation (RAG) struggles on long, structured financial filings where relevant evidence is sparse and cross-referenced. This paper presents a systematic investigation of advanced metadata-driven Retrieval-Augmented…

Information Retrieval · Computer Science 2025-10-29 Michail Dadopoulos , Anestis Ladas , Stratos Moschidis , Ioannis Negkakis

Retrieval-Augmented Generation (RAG) mitigates hallucination in LLMs by incorporating external knowledge, but relies on chunk-based retrieval that lacks structural semantics. GraphRAG methods improve RAG by modeling knowledge as…

Computation and Language · Computer Science 2025-07-30 Haoran Luo , Haihong E , Guanting Chen , Qika Lin , Yikai Guo , Fangzhi Xu , Zemin Kuang , Meina Song , Xiaobao Wu , Yifan Zhu , Luu Anh Tuan

Retrieval-Augmented Generation (RAG) improves large language models by retrieving external knowledge, often truncated into smaller chunks due to the input context window, which leads to information loss, resulting in response hallucinations…

Computation and Language · Computer Science 2025-11-18 Jie Zhang , Bo Tang , Wanzi Shao , Wenqiang Wei , Jihao Zhao , Jianqing Zhu , Zhiyu li , Wen Xi , Zehao Lin , Feiyu Xiong , Yanchao Tan

With the rapid advancement of large language models (LLMs), retrieval-augmented generation (RAG) has emerged as a critical approach to supplement the inherent knowledge limitations of LLMs. However, due to the typically large volume of…

Computation and Language · Computer Science 2025-11-11 Yuhao Wang , Ruiyang Ren , Yucheng Wang , Jing Liu , Wayne Xin Zhao , Hua Wu , Haifeng Wang

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

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

Large Language Models (LLMs) have swiftly emerged as vital resources for different applications in the biomedical and healthcare domains; however, these models encounter issues such as generating inaccurate information or hallucinations.…

Computation and Language · Computer Science 2024-05-06 Mingchen Li , Halil Kilicoglu , Hua Xu , Rui Zhang

Retrieval-Augmented Generation (RAG) offers a cost-effective approach to injecting real-time knowledge into large language models (LLMs). Nevertheless, constructing and validating high-quality knowledge repositories require considerable…

Computation and Language · Computer Science 2024-05-28 Xun Liang , Simin Niu , Zhiyu li , Sensen Zhang , Shichao Song , Hanyu Wang , Jiawei Yang , Feiyu Xiong , Bo Tang , Chenyang Xi

The scaling of inference computation has unlocked the potential of long-context large language models (LLMs) across diverse settings. For knowledge-intensive tasks, the increased compute is often allocated to incorporate more external…

Computation and Language · Computer Science 2025-03-04 Zhenrui Yue , Honglei Zhuang , Aijun Bai , Kai Hui , Rolf Jagerman , Hansi Zeng , Zhen Qin , Dong Wang , Xuanhui Wang , Michael Bendersky