907 search results - page 144 / 182 » Efficient Optimization of Iterative Queries |
SIGIR
2010
ACM
13 years 3 months ago
2010
ACM
The size of the Web as well as user bases of search systems continue to grow exponentially. Consequently, providing subsecond query response times and high query throughput become...
ICDE
2002
IEEE
14 years 10 months ago
2002
IEEE
Overlapping and multi-version techniques are two popular frameworks that transform an ephemeral index into a multiple logical-tree structure in order to support versioning databas...
SIGMOD
1999
ACM
14 years 1 months ago
1999
ACM
The database query optimizer requires the estimation of the query selectivity to find the most efficient access plan. For queries referencing multiple attributes from the same rel...
SIGMOD
2009
ACM
14 years 9 months ago
2009
ACM
SQL tuning--the attempt to improve a poorly-performing execution plan produced by the database query optimizer-is a critical aspect of database performance tuning. Ironically, as ...
MICCAI
2009
Springer
14 years 10 months ago
2009
Springer
We present a novel fuzzy region-based hidden Markov model (frbHMM) for unsupervised partial-volume classification in brain magnetic resonance images (MRIs). The primary contributio...