335 search results - page 23 / 67 » A sampling approach for XML query selectivity estimation |
SIGIR
2009
ACM
14 years 2 months ago
2009
ACM
The need for evaluating large amounts of topics (queries) makes IR evaluation an uneasy task. In this paper, we study a topic selection problem for IR evaluation. The selection cr...
DEXA
2006
Springer
13 years 9 months ago
2006
Springer
Geographic information systems (GIS) must support large georeferenced data sets. Due to the size of these data sets finding exact answers to spatial queries can be very time consum...
ICCV
2001
IEEE
14 years 9 months ago
2001
IEEE
We present two solutions for the scale selection problem in computer vision. The rst one is completely nonparametric and is based on the the adaptive estimation of the normalized ...
GEOINFORMATICA
2006
13 years 7 months ago
2006
Existing estimation approaches for spatial databases often rely on the assumption that data distribution in a small region is uniform, which seldom holds in practice. Moreover, the...
WSC
2007
13 years 10 months ago
2007
Statistical selection procedures can identify the best of a finite set of alternatives, where “best” is defined in terms of the unknown expected value of each alternative’...