335 search results - page 41 / 67 » A sampling approach for XML query selectivity estimation |
INFOCOM
2010
IEEE
13 years 6 months ago
2010
IEEE
Abstract—The queueing performance of a (secondary) cognitive user is investigated for a hierarchical network where there are N independent and identical primary users. Each prima...
ICDE
2007
IEEE
14 years 2 months ago
2007
IEEE
We consider the problem of semantic load shedding for continuous queries containing window joins on multiple data streams and propose a robust approach that is effective with the ...
ILP
2003
Springer
14 years 27 days ago
2003
Springer
Query optimization is used frequently in relational database management systems. Most existing techniques are based on reordering the relational operators, where the most selective...
SMI
2006
IEEE
14 years 1 months ago
2006
IEEE
Databases of 3D shapes have become widespread for a variety of applications, and a key research problem is searching these databases for similar shapes. This paper introduces a me...
HPDC
2007
IEEE
14 years 2 months ago
2007
IEEE
We study stochastic models to mitigate the risk of poor Quality-of-Service (QoS) in computational markets. Consumers who purchase services expect both price and performance guaran...