1487 search results - page 178 / 298 » Representing and Querying Data Transformations |
118
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MICS
2008
15 years 1 months ago
2008
Multi-level overlay graphs represent a speed-up technique for shortest paths computation which is based on a hierarchical decomposition of a weighted directed graph G. They have b...
111
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IJCGA
2000
15 years 1 months ago
2000
We present e cient algorithms for several instances of the following facility location problem. Facilities and demand sites are represented as points in the plane. Place k obnoxio...
137
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TODS
2002
15 years 1 months ago
2002
Metric access methods (MAMs), such as the M-tree, are powerful index structures for supporting ty queries on metric spaces, which represent a common abstraction for those searchin...
125
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VLDB
1994
ACM
15 years 5 months ago
1994
ACM
This paper introduces a formalism to describe the needs and preferences of database users. Because of the precise formulation of these concepts, we have found an automatic and ver...
104
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TIME
2005
IEEE
15 years 7 months ago
2005
IEEE
This paper presents an XML-based approach to implementing the parametric model of temporal databases. In the parametric model, attribute values are functions of time and the entir...