651 search results - page 80 / 131 » Algebraic Query Optimization for Distributed Top-k Queries |
SIGIR
2011
ACM
12 years 12 months ago
2011
ACM
Large search engines process thousands of queries per second over billions of documents, making query processing a major performance bottleneck. An important class of optimization...
KR
2004
Springer
14 years 2 months ago
2004
Springer
Practical description logic systems play an ever-growing role for knowledge representation and reasoning research even in distributed environments. In particular, the often-discus...
ICDE
2010
IEEE
14 years 8 months ago
2010
IEEE
Abstract-- This paper introduces a deterministic approximation algorithm with error guarantees for computing the probability of propositional formulas over discrete random variable...
ICDE
2009
IEEE
14 years 3 months ago
2009
IEEE
— Existing stream processing systems are optimized for a specific metric, which may limit their applicability to diverse applications and environments. This paper presents XFlow...
EDBT
2009
ACM
14 years 3 months ago
2009
ACM
In a variety of applications, ranging from data integration to distributed query evaluation, there is a need to obtain sets of data items from several sources (peers) and compute ...