2724 search results - page 486 / 545 » Optimizing Queries on Files |
126
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VLDB
2002
ACM
15 years 1 months ago
2002
ACM
Accurate prediction of operator execution time is a prerequisite for database query optimization. Although extensively studied for conventional disk-based DBMSs, cost modeling in ...
139
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SIGIR
2011
ACM
14 years 4 months ago
2011
ACM
Inverted indexes are the most fundamental and widely used data structures in information retrieval. For each unique word occurring in a document collection, the inverted index sto...
142
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SIGIR
2011
ACM
14 years 4 months ago
2011
ACM
A key challenge in recommender system research is how to effectively profile new users, a problem generally known as cold-start recommendation. Recently the idea of progressivel...
133
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BMCBI
2008
15 years 1 months ago
2008
Background: Correctly merged data sets that have been independently genotyped can increase statistical power in linkage and association studies. However, alleles from microsatelli...
132
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ICDCS
2008
IEEE
15 years 8 months ago
2008
IEEE
A multi-object operation incurs communication or synchronization overhead when the requested objects are distributed over different nodes. The object pair correlations (the probab...