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Embedding-based retrieval methods construct vector indices to search for document representations that are most similar to the query representations. They are widely used in document retrieval due to low latency and decent recall…

Hypergraphs are generalisation of graphs in which a hyperedge can connect any number of vertices. It can describe n-ary relationships and high-order information among entities compared to conventional graphs. In this paper, we study the…

Databases · Computer Science 2023-02-21 Zhengyi Yang , Wenjie Zhang , Xuemin Lin , Ying Zhang , Shunyang Li

Existing Graph Neural Networks (GNNs) are limited to process graphs each of whose vertices is represented by a vector or a single value, limited their representing capability to describe complex objects. In this paper, we propose the first…

Machine Learning · Computer Science 2024-07-02 Jiongshu Wang , Jing Yang , Jiankang Deng , Hatice Gunes , Siyang Song

Vector search systems are indispensable in large language model (LLM) serving, search engines, and recommender systems, where minimizing online search latency is essential. Among various algorithms, graph-based vector search (GVS) is…

Hardware Architecture · Computer Science 2025-07-21 Wenqi Jiang , Hang Hu , Torsten Hoefler , Gustavo Alonso

Graph Convolutional Networks (GCNs) are widely adopted for tasks involving relational or graph-structured data and can be formulated as two-stage sparse-dense matrix multiplication (SpMM) during inference. However, existing accelerators…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-04-14 Bohan Li , Shengmin Li , Xinyu Shi , Enyi Yao , Francky Catthoor , Simei Yang

We present a repository decomposition system that converts large software repositories into a vectorized knowledge graph which mirrors project architectural and semantic structure, capturing semantic relationships and allowing a significant…

Graph pattern matching is a fundamental operation for the analysis and exploration ofdata graphs. In thispaper, we presenta novel approachfor efficiently finding homomorphic matches for hybrid graph patterns, where each pattern edge may be…

Databases · Computer Science 2022-09-29 Xiaoying Wu , Dimitri Theodoratos , Nikos Mamoulis , Michael Lan

Graph databases have garnered extensive attention and research due to their ability to manage relationships between entities efficiently. Today, many graph search services have been outsourced to a third-party server to facilitate storage…

Cryptography and Security · Computer Science 2025-03-14 Qiuhao Wang , Xu Yang , Yiwei Liu , Saiyu Qi , Hongguang Zhao , Ke Li , Yong Qi

Retrieval-augmented generation (RAG) empowers large language models to access external and private corpus, enabling factually consistent responses in specific domains. By exploiting the inherent structure of the corpus, graph-based RAG…

Artificial Intelligence · Computer Science 2025-04-17 Tianyang Xu , Haojie Zheng , Chengze Li , Haoxiang Chen , Yixin Liu , Ruoxi Chen , Lichao Sun

A hypergraph is a generalization of a graph, in which a hyperedge can connect multiple vertices, modeling complex relationships involving multiple vertices simultaneously. Hypergraph pattern matching, which is to find all isomorphic…

Databases · Computer Science 2025-12-23 Siwoo Song , Wonseok Shin , Kunsoo Park , Giuseppe F. Italiano , Zhengyi Yang , Wenjie Zhang

Vector indexing enables semantic search over diverse corpora and has become an important interface to databases for both users and AI agents. Efficient vector search requires deep optimizations in database systems. This has motivated a new…

Neural embedding models are extensively employed in the table union search problem, which aims to find semantically compatible tables that can be merged with a given query table. In particular, multi-vector models, which represent a table…

Databases · Computer Science 2025-11-10 Yiming Xie , Hua Dai , Mingfeng Jiang , Pengyue Li , zhengkai Zhang , Bohan Li

Graph databases (GDBs) enable processing and analysis of unstructured, complex, rich, and usually vast graph datasets. Despite the large significance of GDBs in both academia and industry, little effort has been made into integrating them…

Graph convolution networks (GCN), which recently becomes new state-of-the-art method for graph node classification, recommendation and other applications, has not been successfully applied to industrial-scale search engine yet. In this…

Information Retrieval · Computer Science 2021-07-02 Xinlin Xia , Shang Wang , Han Zhang , Songlin Wang , Sulong Xu , Yun Xiao , Bo Long , Wen-Yun Yang

Vector similarity search is becoming increasingly important for data science pipelines, particularly in Retrieval-Augmented Generation (RAG), where it enhances large language model inference by enabling efficient retrieval of relevant…

Databases · Computer Science 2026-03-31 Hyunjoon Kim , Chaerim Lim , Hyeonjun An , Rathijit Sen , Kwanghyun Park

Modern Retrieval-Augmented Generation (RAG) systems struggle with a fundamental architectural tension: vector indices are optimized for query latency but poorly handle continuous knowledge updates, while data lakes excel at versioning but…

Information Retrieval · Computer Science 2026-01-12 Tarun Prajapati

Graph-specific computing with the support of dedicated accelerator has greatly boosted the graph processing in both efficiency and energy. Nevertheless, their data conflict management is still sequential in essential when some vertex needs…

Distributed, Parallel, and Cluster Computing · Computer Science 2018-06-05 Pengcheng Yao

As high-dimensional vector data increasingly surpasses the processing capabilities of traditional database management systems, Vector Databases (VDBs) have emerged and become tightly integrated with large language models, being widely…

While AI systems have made remarkable progress in processing unstructured text, structured data such as graphs stored in databases, continues to grow rapidly yet remains difficult for neural models to effectively utilize. We introduce…

Databases · Computer Science 2026-03-09 Yufei Li , Yisen Gao , Jiaxin Bai , Jiaxuan Xiong , Haoyu Huang , Zhongwei Xie , Hong Ting Tsang , Yangqiu Song

Vector databases have rapidly grown in popularity, enabling efficient similarity search over data such as text, images, and video. They now play a central role in modern AI workflows, aiding large language models by grounding model outputs…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-10-17 Seth Ockerman , Amal Gueroudji , Song Young Oh , Robert Underwood , Nicholas Chia , Kyle Chard , Robert Ross , Shivaram Venkataraman