14248 search results - page 182 / 2850 » Queries |
128
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SIGMOD
1995
ACM
15 years 8 months ago
1995
ACM
When querying a temporal database, a user often makes certain semantic assumptions on stored temporal data. This paper formalizes and studies two types of semantic assumptions: po...
156
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DMSN
2005
ACM
15 years 6 months ago
2005
ACM
In this paper we present the Threshold Join Algorithm (TJA), which is an efficient TOP-k query processing algorithm for distributed sensor networks. The objective of a top-k query...
135
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ESWS
2008
Springer
15 years 6 months ago
2008
Springer
Abstract. In semantic web applications where query initiators and information providers do not necessarily share the same ontology, semantic interoperability generally relies on on...
155
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ECIR
2007
Springer
15 years 6 months ago
2007
Springer
We consider the issue of query performance, and we propose a novel method for automatically predicting the difficulty of a query. Unlike a number of existing techniques which are b...
139
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BNCOD
2003
15 years 6 months ago
2003
In this paper we describe a query paradigm based on ontologies, aggregate table-driven querying and expansion of QBE. It has two novel features: visually specifying aggregate table...