Results 81 to 90 of about 2,551,481 (193)

A Fuzzy Spatial Querying Model for Improving Apartment Web Services [PDF]

open access: yesJournal of Systemics, Cybernetics and Informatics, 2008
An apartment web service is a web site intended to provide online services to the residents. With the availability of global positioning systems and the development of new technologies, the access of geo-spatial information has drawn great attention for ...
Huiqing Yang
doaj  

Content based image retrieval by combining features and query-by-sketch [PDF]

open access: yes
This paper reports an approach to improve content-based image retrieval systems. Most current systems are based on a single technique for feature extraction and similarity search.
Lu, Joan, Pein, Raoul Pascal
core   +3 more sources

A novel multi-objective SKG-skyline algorithm integrating spatial keyword data transformation

open access: yesComplex & Intelligent Systems
The spatial keyword skyline query effectively addresses user preferences, particularly for location-based service applications. However, existing approaches primarily focus on single-object queries and remain unsuitable for group-based computations.
Xiaowei Cui   +5 more
doaj   +1 more source

NITELIGHT: A Graphical Tool for Semantic Query Construction

open access: yes, 2008
Query formulation is a key aspect of information retrieval, contributing to both the efficiency and usability of many semantic applications. A number of query languages, such as SPARQL, have been developed for the Semantic Web; however, there are, as yet,
Smart, Paul R.   +3 more
core   +1 more source

Time-variant interest community based query message routing algorithm in opportunity social network

open access: yesTongxin xuebao, 2019
To solve the problem that the successful rate of resource query is low in opportunity social network,a query message routing algorithm based on time-variant interest community was proposed.Two well-known mobile social datasets were firstly analyzed,and ...
Junlei BI, Zhiyuan LI
doaj   +2 more sources

Defining and designing spatial queries: the role of spatial relationships

open access: yesGeo-spatial Information Science
Spatial relationships are core components in the design and definition of spatial queries. A spatial relationship determines how two or more spatial objects are related or connected in space.
Anderson Chaves Carniel
doaj   +1 more source

Potentials for improving query processing in spatial databse systems [PDF]

open access: yes, 1993
Kriegel, Hans-Peter   +2 more
core   +1 more source

SparkGIS: Resource Aware Efficient In-Memory Spatial Query Processing. [PDF]

open access: yesProc ACM SIGSPATIAL Int Conf Adv Inf, 2017
Baig F, Vo H, Kurc T, Saltz J, Wang F.
europepmc   +1 more source

Open issues in semantic query optimization in relational DBMS [PDF]

open access: yes, 2004
After two decades of research into Semantic Query Optimization (SQO) there is clear agreement as to the efficacy of SQO. However, although there are some experimental implementations there are still no commercial implementations.
Genet, Bryan Howard, Hinze, Annika
core  

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