130 search results - page 4 / 26 » A performance comparison of distance-based query algorithms ... |
ICDE
2000
IEEE
14 years 7 months ago
2000
IEEE
Optimizing queries that involve operations on spatial data requires estimating the selectivity and cost of these operations. In this paper, we focus on estimating the cost of spat...
SIGMOD
2009
ACM
14 years 6 months ago
2009
ACM
In this paper, we study a novel form of continuous nearest neighbor queries in the presence of obstacles, namely continuous obstructed nearest neighbor (CONN) search. It considers...
VLDB
1994
ACM
13 years 9 months ago
1994
ACM
Global clustering has rarely been investigated in the area of spatial database systems although dramatic performance improvements can be achieved by using suitable techniques. In ...
AIIA
2007
Springer
13 years 12 months ago
2007
Springer
In this paper we compare four selection strategies in evolutionary optimization of information retrieval (IR) in a question answering setting. The IR index has been augmented by li...
APWEB
2004
Springer
13 years 11 months ago
2004
Springer
Abstract. Spatial data has now been used extensively in the Web environment, providing online customized maps and supporting map-based applications. The full potential of Web-based...