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Approximate Nearest Neighbor Search (ANNS) is essential for modern data-driven applications that require efficient retrieval of top-k results from massive vector databases. Although existing graph-based ANNS algorithms achieve a high recall…

Information Retrieval · Computer Science 2025-03-03 Yang Shi , Yiping Sun , Jiaolong Du , Xiaocheng Zhong , Zhiyong Wang , Yao Hu

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

Neural Architecture Search (NAS) is a popular tool for automatically generating Neural Network (NN) architectures. In early NAS works, these tools typically optimized NN architectures for a single metric, such as accuracy. However, in the…

Neural and Evolutionary Computing · Computer Science 2023-04-05 Emil Njor , Jan Madsen , Xenofon Fafoutis

In the past few years, Differentiable Neural Architecture Search (DNAS) rapidly imposed itself as the trending approach to automate the discovery of deep neural network architectures. This rise is mainly due to the popularity of DARTS, one…

Machine Learning · Computer Science 2023-05-02 Alexandre Heuillet , Ahmad Nasser , Hichem Arioui , Hedi Tabia

Approximate Nearest Neighbor Search (ANNS) is a fundamental and critical component in many applications, including recommendation systems and large language model-based applications. With the advancement of multimodal neural models, which…

Information Retrieval · Computer Science 2024-08-20 Meng Chen , Kai Zhang , Zhenying He , Yinan Jing , X. Sean Wang

Given a vector dataset $\mathcal{X}$ and a query vector $\vec{x}_q$, graph-based Approximate Nearest Neighbor Search (ANNS) aims to build a graph index $G$ and approximately return vectors with minimum distances to $\vec{x}_q$ by searching…

Information Retrieval · Computer Science 2023-12-01 Jiongkang Ni , Xiaoliang Xu , Yuxiang Wang , Can Li , Jiajie Yao , Shihai Xiao , Xuecang Zhang

Vector search, the task of finding the k-nearest neighbors of a query vector against a database of high-dimensional vectors, underpins many machine learning applications, including retrieval-augmented generation, recommendation systems, and…

As the state-of-the-art methods for high-dimensional data retrieval, Approximate Nearest Neighbor Search (ANNS) approaches with graph-based indexes have attracted increasing attention and play a crucial role in many real-world applications,…

Nearest neighbor search plays a fundamental role in many disciplines such as multimedia information retrieval, data-mining, and machine learning. The graph-based search approaches show superior performance over other types of approaches in…

Information Retrieval · Computer Science 2022-04-05 Hui Wang , Yong Wang , Wan-Lei Zhao

Neural architecture search (NAS) is an attractive approach to automate the design of optimized architectures but is constrained by high computational budget, especially when optimizing for multiple, important conflicting objectives. To…

Machine Learning · Computer Science 2025-09-03 Zhao Wei , Chin Chun Ooi , Yew-Soon Ong

Approximate Nearest Neighbor (ANN) search has become fundamental to modern AI infrastructure, powering recommendation systems, search engines, and large language models across industry leaders from Google to OpenAI. Hierarchical Navigable…

Information Retrieval · Computer Science 2026-02-26 Ganap Ashit Tewary , Nrusinga Charan Gantayat , Jeff Zhang

Embedding-based dense retrieval has become the cornerstone of many critical applications, where approximate nearest neighbor search (ANNS) queries are often combined with filters on labels such as dates and price ranges. Graph-based indexes…

Databases · Computer Science 2026-01-13 Yicheng Jin , Yongji Wu , Wenjun Hu , Bruce M. Maggs , Jun Yang , Xiao Zhang , Danyang Zhuo

Deep Neural Networks (DNNs) are increasingly deployed across diverse industries, driving demand for mobile device support. However, existing mobile inference frameworks often rely on a single processor per model, limiting hardware…

Distributed, Parallel, and Cluster Computing · Computer Science 2025-03-28 Yunquan Gao , Zhiguo Zhang , Praveen Kumar Donta , Chinmaya Kumar Dehury , Xiujun Wang , Dusit Niyato , Qiyang Zhang

Approximate Nearest Neighbor Search (ANNS) is now widely used in various applications, ranging from information retrieval, question answering, and recommendation, to search for similar high-dimensional vectors. As the amount of vector data…

Information Retrieval · Computer Science 2024-10-21 Yuming Xu , Hengyu Liang , Jin Li , Shuotao Xu , Qi Chen , Qianxi Zhang , Cheng Li , Ziyue Yang , Fan Yang , Yuqing Yang , Peng Cheng , Mao Yang

The in-memory approximate nearest neighbor search (ANNS) algorithms have achieved great success for fast high-recall query processing, but are extremely inefficient when handling hybrid queries with unstructured (i.e., feature vectors) and…

Databases · Computer Science 2022-07-19 Wei Wu , Junlin He , Yu Qiao , Guoheng Fu , Li Liu , Jin Yu

Approximate Nearest Neighbor Search (ANNS) in high dimensional space is essential in database and information retrieval. Recently, there has been a surge of interest in exploring efficient graph-based indices for the ANNS problem. Among…

Information Retrieval · Computer Science 2021-03-19 Cong Fu , Changxu Wang , Deng Cai

Given a hybrid dataset where every data object consists of a vector and an attribute value, for each query with a target vector and a range filter, range-filtering approximate nearest neighbor search (RFANNS) aims to retrieve the most…

Databases · Computer Science 2025-09-29 Ziqi Wang , Jingzhe Zhang , Wei Hu

Approximate Nearest Neighbor Search (ANNS), as the core of vector databases (VectorDBs), has become widely used in modern AI and ML systems, powering applications from information retrieval to bio-informatics. While graph-based ANNS methods…

Machine Learning · Computer Science 2025-10-07 Dingyi Kang , Dongming Jiang , Hanshen Yang , Hang Liu , Bingzhe Li

In the era of data proliferation, efficiently sifting through vast information to extract meaningful insights has become increasingly crucial. This paper addresses the computational overhead and resource inefficiency prevalent in existing…

Information Retrieval · Computer Science 2024-12-20 Sheng Zhang , Maolin Wang , Yao Zhao , Chenyi Zhuang , Jinjie Gu , Ruocheng Guo , Xiangyu Zhao , Zijian Zhang , Hongzhi Yin

Recently, some Neural Architecture Search (NAS) techniques are proposed for the automatic design of Graph Convolutional Network (GCN) architectures. They bring great convenience to the use of GCN, but could hardly apply to the Federated…

Machine Learning · Computer Science 2021-04-12 Chunnan Wang , Bozhou Chen , Geng Li , Hongzhi Wang