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Range-filtering approximate nearest neighbor (RFANN) search is attracting increasing attention in academia and industry. Given a set of data objects, each being a pair of a high-dimensional vector and a numeric value, an RFANN query with a…

Databases · Computer Science 2024-09-05 Yuexuan Xu , Jianyang Gao , Yutong Gou , Cheng Long , Christian S. Jensen

This paper studies density-based clustering of point sets. These methods use dense regions of points to detect clusters of arbitrary shapes. In particular, we study variants of density peaks clustering, a popular type of algorithm that has…

Data Structures and Algorithms · Computer Science 2025-06-04 Shangdi Yu , Joshua Engels , Yihao Huang , Julian Shun

With the continuous popularity of deep learning and representation learning, fast vector search becomes a vital task in various ranking/retrieval based applications, say recommendation, ads ranking and question answering. Neural network…

Information Retrieval · Computer Science 2023-12-29 Weijie Zhao , Shulong Tan , Ping Li

As data volumes grow while memory capacity remains limited, disk-resident graph-based approximate nearest neighbor (ANN) methods have become a practical alternative to memory-resident designs, shifting the bottleneck from computation to…

Databases · Computer Science 2026-03-03 Xiaoyu Chen , Jinxiu Qu , Yitong Song , Shuhang Lu , Huiling Li , Minghui Jiang , Wei Zhou , Jianliang Xu , Xuanhe Zhou , Fan Wu

Disk-based graph indexes for approximate nearest neighbor search (ANNS) must serve latency-sensitive queries and throughput-demanding updates concurrently. We observe that over 40% of search-thread CPU time is spent stalling on disk I/O;…

Databases · Computer Science 2026-05-20 Juncheng Zhang , Yuanming Ren , Yongkun Li , Patrick P. C. Lee

This study develops a graph search algorithm to find the optimal discrimination path for the binary classification problem. The objective function is defined as the difference of variations between the true positive (TP) and false positive…

Machine Learning · Computer Science 2024-01-10 Qinwu Xu

Approximate nearest neighbor (ANN) search in high-dimensional Euclidean space has a broad range of applications. Among existing ANN algorithms, graph-based methods have shown superior performance in terms of the time-accuracy trade-off.…

Databases · Computer Science 2024-11-20 Yutong Gou , Jianyang Gao , Yuexuan Xu , Cheng Long

Vector search has emerged as the foundation for large-scale information retrieval and machine learning systems, with search engines like Google and Bing processing tens of thousands of queries per second on petabyte-scale document datasets…

Range-filtered approximate nearest neighbor (RFANN) search is a fundamental operation in modern data systems. Given a set of objects, each with a vector and a numerical attribute, an RFANN query retrieves the nearest neighbors to a query…

Databases · Computer Science 2026-05-05 Zhiqiu Zou , Ziqi Yin , Rong-Hua Li , Hongchao Qin , Qiangqiang Dai , Guoren Wang

Graph neural architecture search (GraphNAS) has recently aroused considerable attention in both academia and industry. However, two key challenges seriously hinder the further research of GraphNAS. First, since there is no consensus for the…

Machine Learning · Computer Science 2024-03-12 Yijian Qin , Ziwei Zhang , Xin Wang , Zeyang Zhang , Wenwu Zhu

Retrieval-Augmented Generation (RAG) relies on large-scale Approximate Nearest Neighbor Search (ANNS) to retrieve semantically relevant context for large language models. Among ANNS methods, IVF-PQ offers an attractive balance between…

Hardware Architecture · Computer Science 2026-03-03 Po-Kai Hsu , Weihong Xu , Qunyou Liu , Tajana Rosing , Shimeng Yu

As artificial intelligence gains more and more popularity, vectors are one of the most widely used data structures for services such as information retrieval and recommendation. Approximate Nearest Neighbor Search (ANNS), which generally…

Databases · Computer Science 2026-02-03 Yuhui Lai , Shixun Huang , Sheng Wang

Graph-based indexing is the dominant approach for approximate nearest neighbor search in vector databases, offering high recall with low latency across billions of vectors. However, in such indices, the edge set of the proximity graph is…

Databases · Computer Science 2026-03-03 Sami Abuzakuk , Anne-Marie Kermarrec , Rafael Pires , Mathis Randl , Martijn de Vos

Approximate Nearest Neighbor Search (ANNS) over high-dimensional vectors is a foundational problem in databases, where disk I/O often emerges as the dominant performance bottleneck at scale. To accelerate search, graph-based indexes rely on…

Databases · Computer Science 2026-03-03 Huiling Li , Xin Huang , Byron Choi , Jianliang Xu

Embedding-based vector search underpins many important applications, such as recommendation and retrieval-augmented generation (RAG). It relies on vector indices to enable efficient search. However, these indices require storing…

While memory-augmented neural networks (MANNs) offer an effective solution for few-shot learning (FSL) by integrating deep neural networks with external memory, the capacity requirements and energy overhead of data movement become enormous…

Hardware Architecture · Computer Science 2024-09-13 Hao-Wei Chiang , Chi-Tse Huang , Hsiang-Yun Cheng , Po-Hao Tseng , Ming-Hsiu Lee , An-Yeu , Wu

Graph neural networks (GNNs) have achieved breakthroughs in various real-world downstream tasks due to their powerful expressiveness. As the scale of real-world graphs has been continuously growing, a storage-based approach to GNN training…

Machine Learning · Computer Science 2026-01-07 Myung-Hwan Jang , Jeong-Min Park , Yunyong Ko , Sang-Wook Kim

The BFS algorithm is a basic graph data processing algorithm and many other graph data processing algorithms have similar architectural features with BFS algorithm and can be built on the basis of BFS algorithm model. We analyze the…

Distributed, Parallel, and Cluster Computing · Computer Science 2024-10-30 Chenglong Zhang

Approximate nearest-neighbor search (ANNS) algorithms have become increasingly critical for recent AI applications, particularly in retrieval-augmented generation (RAG) and agent-based LLM applications. In this paper, we present CRINN, a…

Machine Learning · Computer Science 2025-08-21 Xiaoya Li , Xiaofei Sun , Albert Wang , Chris Shum , Jiwei Li

There has been a rise in the popularity of algebraic methods for graph algorithms given the development of the GraphBLAS library and other sparse matrix methods. An exemplar for these approaches is Breadth-First Search (BFS). The algebraic…

Data Structures and Algorithms · Computer Science 2021-05-14 Paul Burkhardt