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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…

Artificial Intelligence · Computer Science 2026-04-21 Chi-Hsiang Hsiao , Yi-Cheng Wang , Tzung-Sheng Lin , Yi-Ren Yeh , Chu-Song Chen

Retrieval-Augmented Generation (RAG) systems often struggle with imperfect retrieval, as traditional retrievers focus on lexical or semantic similarity rather than logical relevance. To address this, we propose \textbf{HopRAG}, a novel RAG…

Information Retrieval · Computer Science 2025-05-27 Hao Liu , Zhengren Wang , Xi Chen , Zhiyu Li , Feiyu Xiong , Qinhan Yu , Wentao Zhang

Large Language Models (LLMs) integrated with Retrieval-Augmented Generation (RAG) techniques have exhibited remarkable performance across a wide range of domains. However, existing RAG approaches primarily operate on unstructured data and…

Artificial Intelligence · Computer Science 2026-04-22 Ge Chang , Jinbo Su , Jiacheng Liu , Pengfei Yang , Yuhao Shang , Huiwen Zheng , Hongli Ma , Yan Liang , Yuanchun Li , Yunxin Liu

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

Retrieval-Augmented Generation (RAG) based on Large Language Models (LLMs) is a powerful solution to understand and query the industry's closed-source documents. However, basic RAG often struggles with complex QA tasks in legal and…

Information Retrieval · Computer Science 2025-09-08 Huifeng Lin , Gang Su , Jintao Liang , You Wu , Rui Zhao , Ziyue Li

Retrieval-Augmented Generation (RAG) based on knowledge graphs (KGs) enhances large language models (LLMs) by providing structured and interpretable external knowledge. However, existing KG-based RAG methods struggle to retrieve accurate…

Artificial Intelligence · Computer Science 2025-10-21 Junchi Yu , Yujie Liu , Jindong Gu , Philip Torr , Dongzhan Zhou

Recent literature highlights the potential of graph-based approaches within large language model (LLM) retrieval-augmented generation (RAG) pipelines for answering queries of varying complexity, particularly those that fall outside the…

Information Retrieval · Computer Science 2026-04-24 Isabela Iacob , Melisa Marian , Gheorghe Cosmin Silaghi

Graph-based retrieval-augmented generation (GraphRAG) has recently emerged as a powerful paradigm for knowledge-intensive question answering, especially for tasks that require structured evidence organization and multi-hop reasoning.…

Information Retrieval · Computer Science 2026-04-21 Dongzhe Fan , Chuanhao Ji , Zimu Wang , Tong Chen , Qiaoyu Tan

Graph-based Retrieval-augmented generation (RAG) has become a widely studied approach for improving the reasoning, accuracy, and factuality of Large Language Models (LLMs). However, many existing graph-based RAG systems overlook the high…

Artificial Intelligence · Computer Science 2025-11-11 Qiao Xiao , Hong Ting Tsang , Jiaxin Bai

Retrieval-Augmented Generation (RAG) systems for biomedical literature are typically evaluated using ranking metrics like Mean Reciprocal Rank (MRR), which measure how well the system identifies the single most relevant chunk. We argue that…

Artificial Intelligence · Computer Science 2026-03-25 Pouria Mortezaagha , Arya Rahgozar

In recent years, large language models (LLMs) have revolutionized the field of natural language processing. However, they often suffer from knowledge gaps and hallucinations. Graph retrieval-augmented generation (GraphRAG) enhances LLM…

Artificial Intelligence · Computer Science 2025-03-19 Kai Guo , Harry Shomer , Shenglai Zeng , Haoyu Han , Yu Wang , Jiliang Tang

Retrieval-Augmented Generation (RAG) systems commonly use chunking strategies for retrieval, which enhance large language models (LLMs) by enabling them to access external knowledge, ensuring that the retrieved information is up-to-date and…

Computation and Language · Computer Science 2025-07-15 Hai Toan Nguyen , Tien Dat Nguyen , Viet Ha Nguyen

Generative AI (GenAI) is expected to play a pivotal role in enabling autonomous optimization in future wireless networks. Within the ORAN architecture, Large Language Models (LLMs) can be specialized to generate xApps and rApps by…

Artificial Intelligence · Computer Science 2025-08-21 Sarat Ahmad , Zeinab Nezami , Maryam Hafeez , Syed Ali Raza Zaidi

Graph-based Retrieval-Augmented Generation (GraphRAG) enhances the reasoning capabilities of Large Language Models (LLMs) by grounding their responses in structured knowledge graphs. Leveraging community detection and relation filtering…

Computation and Language · Computer Science 2026-04-06 Yilin Xiao , Jin Chen , Qinggang Zhang , Yujing Zhang , Chuang Zhou , Longhao Yang , Lingfei Ren , Xin Yang , Xiao Huang

Recent advances in Retrieval-Augmented Generation (RAG) have revolutionized knowledge-intensive tasks, yet traditional RAG methods struggle when the search space is unknown or when documents are semi-structured or structured. We introduce a…

Information Retrieval · Computer Science 2026-03-25 Manie Tadayon , Mayank Gupta

Retrieval-augmented generation (RAG) enhances large language models (LLMs) by incorporating external knowledge. Current hybrid RAG system retrieves evidence from both knowledge graphs (KGs) and text documents to support LLM reasoning.…

Computation and Language · Computer Science 2025-09-22 Xingyu Tan , Xiaoyang Wang , Qing Liu , Xiwei Xu , Xin Yuan , Liming Zhu , Wenjie Zhang

Retrieval-Augmented Generation (RAG) has emerged as a dominant paradigm for mitigating hallucinations in Large Language Models (LLMs) by incorporating external knowledge. Nevertheless, effectively integrating and interpreting key evidence…

Computation and Language · Computer Science 2026-01-26 Zhenghao Liu , Mingyan Wu , Xinze Li , Yukun Yan , Shuo Wang , Cheng Yang , Minghe Yu , Zheni Zeng , Maosong Sun

Retrieval-Augmented Generation (RAG) mitigates hallucinations in Multimodal Large Language Models (MLLMs), yet existing systems struggle with complex cross-modal reasoning. Flat vector retrieval often ignores structural dependencies, while…

Information Retrieval · Computer Science 2026-04-08 Sijun Dai , Qiang Huang , Xiaoxing You , Jun Yu

Graph-based retrieval-augmented generation (RAG) enables large language models (LLMs) to incorporate structured knowledge via graph retrieval as contextual input, enhancing more accurate and context-aware reasoning. We observe that for…

Machine Learning · Computer Science 2025-05-20 Qiuyu Zhu , Liang Zhang , Qianxiong Xu , Cheng Long , Jie Zhang

Technology-enhanced learning environments often help students retrieve relevant learning content for questions arising during self-paced study. Large language models (LLMs) have emerged as novel aids for information retrieval during…

Information Retrieval · Computer Science 2025-09-29 Eason Chen , Chuangji Li , Shizhuo Li , Zimo Xiao , Jionghao Lin , Kenneth R. Koedinger
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