243 search results - page 25 / 49 » Selectivity Estimation for Boolean Queries |
WWW
2005
ACM
15 years 10 months ago
2005
ACM
We consider the problem of efficiently sampling Web search engine query results. In turn, using a small random sample instead of the full set of results leads to efficient approxi...
72
Voted
VLDB
2001
ACM
15 years 2 months ago
2001
ACM
Estimating the number of distinct values is a wellstudied problem, due to its frequent occurrence in queries and its importance in selecting good query plans. Previous work has sh...
100
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SMI
2006
IEEE
15 years 3 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...
66
Voted
SIGIR
2008
ACM
14 years 9 months ago
2008
ACM
Information retrieval evaluation has typically been performed over several dozen queries, each judged to near-completeness. There has been a great deal of recent work on evaluatio...
179
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ICDE
2006
IEEE
15 years 11 months ago
2006
IEEE
The ongoing revolution in life sciences research is producing vast amounts of genetic and proteomic sequence data. Scientists want to pose increasingly complex queries on this dat...