3891 search results - page 256 / 779 » Query Models |
219
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SIGMOD
2004
ACM
16 years 6 months ago
2004
ACM
Virtually every commercial query optimizer chooses the best plan for a query using a cost model that relies heavily on accurate cardinality estimation. Cardinality estimation erro...
178
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VLDB
2007
ACM
16 years 20 days ago
2007
ACM
The general problem of answering top-k queries can be modeled using lists of data items sorted by their local scores. The most efficient algorithm proposed so far for answering to...
161
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CONTEXT
2007
Springer
16 years 22 days ago
2007
Springer
The problem we address in this paper is the role of context in the interpretation of images when pictures are used as queries. An image usually depicts several objects and is open...
180
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SIGMOD
2002
ACM
16 years 6 months ago
2002
ACM
This paper addresses the problem of evaluating ranked top-? queries with expensive predicates. As major DBMSs now all support expensive user-defined predicates for Boolean queries...
170
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ICSNC
2007
IEEE
16 years 26 days ago
2007
IEEE
Radiology, which deals with medical images for diagnosis purposes, has seen a lot of improvements during the last decades thanks to information technology. The migration from stud...