Results 271 to 280 of about 13,582,146 (349)

Spatial Index Structures for Modern Storage Devices: A Survey

IEEE Transactions on Knowledge and Data Engineering, 2023
To optimize the processing of spatial queries, there is an increasing interest in combining spatial index structures with modern storage devices like flash-based Solid State Drives, PCM, and 3D Xpoint.
A. Carniel, C. D. Aguiar
semanticscholar   +1 more source

SPRIG: A Learned Spatial Index for Range and kNN Queries

International Symposium on Spatial and Temporal Databases, 2021
A corpus of recent work has revealed that the learned index can improve query performance while reducing the storage overhead. It potentially offers an opportunity to address the spatial query processing challenges caused by the surge in location-based ...
Song-Nian Zhang, Suprio Ray, Rong-Xing Lu, Yan-Dong Zheng   +3 more
semanticscholar   +1 more source

Spatial index on air

Proceedings of the First IEEE International Conference on Pervasive Computing and Communications, 2003. (PerCom 2003)., 2004
With the advent of wireless networking and personal digital devices, the population of mobile users will increase significantly. Broadcasting is particularly suitable for environments having a large number of clients. In this paper, we study the query processing of some typical location-dependent queries, such as window queries and kNN queries, in a ...
ZHENG, Baihua, LEE, Wang-chien, LEE, Dik Lun   +2 more
openaire   +1 more source

LISA: A Learned Index Structure for Spatial Data

SIGMOD Conference, 2020
In spatial query processing, the popular index R-tree may incur large storage consumption and high IO cost. Inspired by the recent learned index [17] that replaces B-tree with machine learning models, we study an analogy problem for spatial data.
Pengfei Li, Hua Lu, Qian Zheng, Long Yang, Gang Pan   +4 more
semanticscholar   +1 more source

G*-Tree: An Efficient Spatial Index on Road Networks

IEEE International Conference on Data Engineering, 2019
In this paper, we propose an efficient hierarchical index, G*-tree, to optimize spatial queries on road networks. Most existing graph indexes can only support one kind of query, and thus we need to build multiple indexes on a road network to handle ...
Zijian Li, Lei Chen, Yue Wang
semanticscholar   +1 more source

Enhanced Reconfigurable Intelligent Surface-Assisted Spatial Index Modulation

IEEE Transactions on Communications
Reconfigurable intelligent surface (RIS)-assisted spatial index modulation (SIM) is a promising candidate for future wireless communication systems due to its high energy and spectrum efficiencies.
Bo An, Liang Wu, Zai-Chen Zhang, J. Dang, Bin Zhu, Hua-Ping Liu, Jiang-Zhou Wang   +6 more
semanticscholar   +1 more source

Generalized Spatial Modulation With Multi-Index Modulation

IEEE Communications Letters, 2020
In this letter, we propose a novel scheme extending index dimension with two distinct signal constellations, named as generalized spatial modulation with multi-index modulation (GSM-MIM).
Yi-Ju Zhan, Fuchun Huang
semanticscholar   +1 more source

Spatial indexicalities and spatial pragmatics

2012
This paper argues for a rapprochement between the two hitherto entirely separate linguistic research traditions that have as their topic the relationship of space and language. This is on the one hand research on spatial deixis, which focuses on how languages are equipped to deal with location and manoeuvring in space.
openaire   +2 more sources

Spatial Indexing for Video Databases

Journal of Visual Communication and Image Representation, 1996
Abstract Spatial reasoning techniques based on 2D string systems have been successfully applied to indexing pictorial databases. We demonstrate how similar techniques may be extended to represent video sequences, and how this representation may be compressed. Query schemes for both single frame queries, and full subsequence queries are presented. The
Kim Shearer, Svetha Venkatesh, Dorota H. Kieronska   +2 more
openaire   +1 more source

A Spatial Livability Index for dense urban centers

, 2020
This article introduces a Spatial Livability Index based on geographically weighted principal component analysis. We study the case of 203 subzones in Singapore which are dense geographic boundaries in terms of population and built-up area. These regions
Francisco Benita, V. Kalashnikov, B. Tunçer   +2 more
semanticscholar   +1 more source