Results 231 to 240 of about 20,917 (268)

Level-aware collective spatial keyword queries

Information Sciences, 2017
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Pengfei Zhang, Huaizhong Lin, Bin Yao, Dongming Lu   +3 more
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Time-aware spatial keyword cover query

Data & Knowledge Engineering, 2019
Abstract The existing spatial keyword cover query only considers the relevance of the text and the position, and ignores the temporal information of the geospatial objects. In this paper, we define a new query, time-aware spatial keyword cover query (TSKCQ), which takes into account the textual relevance, positional relevance, and temporal ...
Zijun Chen, Tingting Zhao, Wenyuan Liu
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Efficient Processing of Spatial Group Keyword Queries

ACM Transactions on Database Systems, 2015
With the proliferation of geo-positioning and geo-tagging techniques, spatio-textual objects that possess both a geographical location and a textual description are gaining in prevalence, and spatial keyword queries that exploit both location and textual description are gaining in prominence.
Cao, Xin, Cong, Gao, Guo, Tao, Jensen, Christian S., Ooi, Beng Chin   +4 more
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Semantic-aware top-k spatial keyword queries

World Wide Web, 2017
The fast development of GPS equipped devices has aroused widespread use of spatial keyword querying in location based services nowadays. Existing spatial keyword query methodologies mainly focus on the spatial and textual similarities, while leaving the semantic understanding of keywords in spatial Web objects and queries to be ignored. To address this
Qian, Zhihu, Xu, Jiajie, Zheng, Kai, Zhao, Pengpeng, Zhou, Xiaofang   +4 more
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Authentication of Multiple-User Spatial Keywords Queries

2018 IEEE Third International Conference on Data Science in Cyberspace (DSC), 2018
A top-k Multiple-user Spatial Keywords (MUSK) query takes a location and a set of keywords as arguments and returns the k best point of interests (POIs) that satisfy multiple-user's happiness. In the database outsourcing paradigm, data owner (DO) delegates the role of answering user's queries to a cloud service provider(CSP). Since either the CSP or an
Isaac Amankona Obiri, Yong Wang, Raphael Elimeli Nuhoho, Erick Owiyo   +3 more
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Preference-based top-k spatial keyword queries

Proceedings of the 1st international workshop on Mobile location-based service, 2011
With proliferation of geo-positioning and geo-tagging, spatial keyword query has been an attractive and challenging topic that blooms various interesting applications in spatial databases. However, spatial keyword queries in those fields do not always satisfy users requirements.
Jinzeng Zhang, Dongqi Liu, Xiaofeng Meng
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Evaluating spatial-keyword queries on streaming data

Proceedings of the 26th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems, 2018
This paper provides an extensive experimental evaluation for different spatial-keyword index structures on streaming data. We extend existing snapshot spatial-keyword queries with the temporal dimension to effectively serve streaming data applications.
Abdulaziz Almaslukh, Amr Magdy
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Enriching Blockchain with Spatial Keyword Query Processing

International Journal of Information and Computer Security, 2022
Muhammad Kashif Azhar, Bin Yao, Zhongpu Chen   +2 more
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Spatial Keyword Query Processing:An Experimental Evaluation

2013
Geo-textual indices play an important role in spatial keyword query-ing. The existing geo-textual indices have not been compared sys-tematically under the same experimental framework. This makesit difficult to determine which indexing technique best supportsspecific functionality.
Chen, Lisi, Jensen, Christian S., Wu, Dingming   +2 more
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Multi-objective Spatial Keyword Query with Semantics

2017
Multi-objective spatial keyword query finds broad applications in map services nowadays. It aims to find a set of objects that can cover all query objectives and are reasonably distributed in spatial. However, existing approaches mainly take the coverage of query keywords into account, while leaving the semantics behind the textual data to be largely ...
Jing Chen, Jiajie Xu, Chengfei Liu, Zhixu Li, An Liu, Zhiming Ding   +5 more
openaire   +1 more source