Results 31 to 40 of about 23,651 (261)
Query Processing in Spatial Network Databases [PDF]
, 2003 Despite the importance of spatial networks in real-life applications, most of the spatial database literature focuses on Euclidean spaces. In this paper we propose an architecture that integrates network and Euclidean information, capturing pragmatic constraints.
Dimitris Papadias +3 more
openaire +2 more sources
International Journal of Distributed Sensor Networks, 2015 Database applications in wireless sensor networks very often demand data collection from sensor nodes of specific target regions. Design and development of spatial query expressions and energy-efficient query processing strategy are important issues for ...
Chong sok Lim +3 more
doaj +1 more source
A NOVEL APPROACH OF INDEXING AND RETRIEVING SPATIAL POLYGONS FOR EFFICIENT SPATIAL REGION QUERIES [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017 Spatial region queries are more and more widely used in web-based applications. Mechanisms to provide efficient query processing over geospatial data are essential. However, due to the massive geospatial data volume, heavy geometric computation, and high
J. H. Zhao +7 more
doaj +1 more source
SPATIAL QUERIES ENTITY RECOGNITION AND DISAMBIGUATION USING RULE-BASED APPROACH [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015 In the digital world, search engines have been proposed as one of challenging research areas. One of the main issues in search engines studies is query processing, which its aim is to understand user’s needs.
E. Hamzei, F. Hakimpour, A. Forati
doaj +1 more source
Groups Nearest Neighbor Query of Mixed Data in Spatial Database [PDF]
Jisuanji kexue yu tansuo, 2022 The existing group nearest neighbor query methods mainly abstract data objects in space as points or line segments for processing. However, in real applications, simply abstracting spatial objects into points or line segments often affects the accuracy ...
JIANG Yiying, ZHANG Liping, JIN Feihu, HAO Xiaohong
doaj +1 more source
An Efficient Top-
IEEE Access, 2019 Existing spatial keyword query processing models mainly consider the spatial proximity and text relevancy between spatial objects and spatial keyword query, which usually makes the top-k answer objects are similar to each other.
Xiaoyan Zhang +4 more
doaj +1 more source
Efficient spatial query processing for big data [PDF]
Proceedings of the 22nd ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems, 2014 Spatial queries are widely used in many data mining and analytics applications. However, a huge and growing size of spatial data makes it challenging to process the spatial queries efficiently. In this paper we present a lightweight and scalable spatial index for big data stored in distributed storage systems.
Kisung Lee +3 more
openaire +1 more source
Gridvoronoi: An Efficient Spatial Index for Nearest Neighbor Query Processing
IEEE Access, 2019 In this paper, based upon Voronoi Diagram, we propose GridVoronoi which is a novel spatial index that enables users to find the spatial nearest neighbour (NN) from two-dimensional (2D) datasets in almost O(1) time.
Chongsheng Zhang +3 more
doaj +1 more source
GeoFlink: An Efficient and Scalable Spatial Data Stream Management System
IEEE Access, 2022 This era is witnessing an exponential growth in spatial data due to the increase in GPS-enabled devices. Spatial data can be of extreme use to commercial businesses, governments and NGOs if processed timely.
Salman Ahmed Shaikh +4 more
doaj +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Adolescents with haematological malignancies face significant emotional and relational challenges, often accompanied by difficulties in communicating their needs within the healthcare context. To address these issues, a narrative‐based psycho‐educational intervention based on the creation and prescription of Ironic Medications was ...
Marta Stoppa +7 more
wiley +1 more source