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Pre-trained language models advance patent classification and retrieval via encoding claims as flat token sequences, yet overlooking the dependency hierarchy among claims. Incorporating the hierarchy into self-attention poses two…

Computation and Language · Computer Science 2026-05-28 Yongmin Yoo , Qiongkai Xu , Zhangkai Wu , Longbing Cao

Semantic search in retrieval-augmented generation (RAG) systems is often insufficient for complex information needs, particularly when relevant evidence is scattered across multiple sources. Prior approaches to this problem include agentic…

Machine Learning · Computer Science 2026-03-27 Ruizhong Miao , Yuying Wang , Rongguang Wang , Chenyang Li , Tao Sheng , Sujith Ravi , Dan Roth

Retrieval-Augmented Generation (RAG) systems for question answering typically retrieve evidence by semantic similarity between the query and document chunks. While effective for unstructured text, this approach is less reliable on…

Memory retrieval in agentic large language model (LLM) systems is often treated as a static lookup problem, relying on flat vector search or fixed binary relational graphs. However, fixed graph structures cannot capture the varying…

Artificial Intelligence · Computer Science 2026-05-12 Dongming Jiang , Yi Li , Guanpeng Li , Qiannan Li , Bingzhe Li

Retrieval-Augmented Generation (RAG) enhances LLMs by grounding generation in query-relevant external evidence. Beyond unstructured text corpora, Graph RAG integrates knowledge graphs into the retrieval pipeline, enabling LLMs to access…

Cryptography and Security · Computer Science 2026-05-28 Jinze Gu , Qinghua Mao , Xi Lin , Jun Wu

Generating high-fidelity synthetic tabular data remains a critical challenge for enhancing data availability in privacy-sensitive and low-resource domains. Recent approaches leverage LLMs by representing table rows as sequences, yet suffer…

Machine Learning · Computer Science 2026-04-28 Shuo Yang , Zheyu Zhang , Bardh Prenkaj , Gjergji Kasneci

Retrieval-Augmented Generation enhances language models by retrieving external knowledge to support informed and grounded responses. However, traditional RAG methods rely on fragment-level retrieval, limiting their ability to address…

Information Retrieval · Computer Science 2026-05-05 Wenbiao Tao , Xinyuan Li , Yunshi Lan , Weining Qian

Retrieval-Augmented Generation (RAG) is widely used to mitigate hallucinations of Large Language Models (LLMs) by leveraging external knowledge. While effective for simple queries, traditional RAG systems struggle with large-scale,…

Computation and Language · Computer Science 2025-11-11 Luyao Zhuang , Shengyuan Chen , Yilin Xiao , Huachi Zhou , Yujing Zhang , Hao Chen , Qinggang Zhang , Xiao Huang

Knowledge graphs (KGs) offer a rich representation for relational knowledge, but their irregular structure makes retrieval challenging: ego-graph expansion grows rapidly, and dense embedding methods struggle with multi-hop compositional…

Machine Learning · Computer Science 2026-05-25 Hamed Shirzad , Frederik Wenkel , Dominique Beaini , Danica J. Sutherland , Emmanuel Noutahi

Graph-based RAG methods like GraphRAG have shown promising global understanding of the knowledge base by constructing hierarchical entity graphs. However, they often suffer from inefficiency and rely on manually pre-defined query modes,…

Artificial Intelligence · Computer Science 2025-06-09 Yibo Zhao , Jiapeng Zhu , Ye Guo , Kangkang He , Xiang Li

Retrieval-Augmented Generation (RAG) enhances language models by incorporating external knowledge at inference time. However, graph-based RAG systems often suffer from structural overhead and imprecise retrieval: they require costly…

Information Retrieval · Computer Science 2025-06-24 Jiale Zhang , Jiaxiang Chen , Zhucong Li , Jie Ding , Kui Zhao , Zenglin Xu , Xin Pang , Yinghui Xu

We present CAGE (Continuity-Aware edGE) network, a robust framework for reconstructing vector floorplans directly from point-cloud density maps. Traditional corner-based polygon representations are highly sensitive to noise and incomplete…

Computer Vision and Pattern Recognition · Computer Science 2025-10-16 Yiyi Liu , Chunyang Liu , Bohan Wang , Weiqin Jiao , Bojian Wu , Lubin Fan , Yuwei Chen , Fashuai Li , Biao Xiong

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) systems critically depend on how external knowledge is segmented, structured, and retrieved. Most existing approaches either retrieve fixed-length text chunks, which fragments discourse context, or…

Information Retrieval · Computer Science 2026-04-21 Mengzhu Chen , Haodong Yang , Jia Cai , Xiaolin Huang

Large Language Models (LLMs) have been widely adopted in conversational applications. However, their reliance on parametric knowledge limits reliability in real-world scenarios that require dynamic or domain-specific information.…

Computation and Language · Computer Science 2026-05-26 Kaiqiao Han , LuAn Tang , Renliang Sun , Peng Yuan , Wei Cheng , Haoyu Wang , Wei Wang , Yizhou Sun , Haifeng Chen

Building upon the standard graph-based Retrieval-Augmented Generation (RAG), the introduction of heterogeneous graphs and hypergraphs aims to enrich retrieval and generation by leveraging the relationships between multiple entities through…

Computation and Language · Computer Science 2025-09-03 Xuecheng Zou , Ke Liu , Bingbing Wang , Huafei Deng , Li Zhang , Yu Tang

The accelerating growth of scientific publications has intensified the need for scalable, trustworthy systems to synthesize knowledge across diverse literature. While recent retrieval-augmented generation (RAG) methods have improved access…

Digital Libraries · Computer Science 2025-11-19 Hang Ding , Yilun Zhao , Tiansheng Hu , Manasi Patwardhan , Arman Cohan

Retrieval-augmented generation (RAG) methods can enhance the performance of LLMs by incorporating retrieved knowledge chunks into the generation process. In general, the retrieval and generation steps usually have different requirements for…

Information Retrieval · Computer Science 2025-04-16 Peiru Yang , Xintian Li , Zhiyang Hu , Jiapeng Wang , Jinhua Yin , Huili Wang , Lizhi He , Shuai Yang , Shangguang Wang , Yongfeng Huang , Tao Qi

Knowledge graphs store a large number of factual triples while they are still incomplete, inevitably. The previous knowledge graph completion (KGC) models predict missing links between entities merely relying on fact-view data, ignoring the…

Artificial Intelligence · Computer Science 2022-04-19 Guanglin Niu , Bo Li , Yongfei Zhang , Shiliang Pu

Retrieval-Augmented Generation (RAG) enables Large Language Models (LLMs) to extend their existing knowledge by dynamically incorporating external information. However, practical deployment is fundamentally constrained by the LLM's finite…

Information Retrieval · Computer Science 2026-03-24 Jiarui Guo , Yuemeng Xu , Zongwei Lv , Yangyujia Wang , Xiaolin Wang , Kan Liu , Tao Lan , Lin Qu , Tong Yang