77 search results - page 9 / 16 » Selectivity Estimation of Complex Spatial Queries |
PODS
2008
ACM
14 years 7 months ago
2008
ACM
We study complexity and approximation of queries in an expressive query language for probabilistic databases. The language studied supports the compositional use of confidence com...
ICDE
2012
IEEE
11 years 10 months ago
2012
IEEE
—Shortest distance query between two nodes is a fundamental operation in large-scale networks. Most existing methods in the literature take a landmark embedding approach, which s...
PVLDB
2008
13 years 7 months ago
2008
Estimates of predicate selectivities by database query optimizers often differ significantly from those actually encountered during query execution, leading to poor plan choices a...
SIGIR
2012
ACM
11 years 10 months ago
2012
ACM
Exploratory search, in which a user investigates complex concepts, is cumbersome with today’s search engines. We present a new exploratory search approach that generates interac...
ECCV
2006
Springer
14 years 9 months ago
2006
Springer
A novel adaptive and patch-based approach is proposed for image regularization and representation. The method is unsupervised and based on a pointwise selection of small image patc...