204 search results - page 29 / 41 » Containment of Conjunctive Queries with Negation: Algorithms... |
SSDBM
2007
IEEE
14 years 2 months ago
2007
IEEE
In stream join processing with limited memory, uniform random sampling is useful for approximate query evaluation. In this paper, we address the problem of reservoir sampling over...
CVPR
2008
IEEE
14 years 9 months ago
2008
IEEE
For content level access, very often database needs the query as a sample image. However, the image may contain private information and hence the user does not wish to reveal the ...
IDEAS
2008
IEEE
14 years 2 months ago
2008
IEEE
Data stored in a data warehouse are inherently multidimensional, but most data-pruning techniques (such as iceberg and top-k queries) are unidimensional. However, analysts need to...
CONCUR
2006
Springer
13 years 11 months ago
2006
Springer
One of the advantages of temporal-logic model-checking tools is their ability to accompany a negative answer to the correctness query by a counterexample to the satisfaction of the...
SIGIR
2012
ACM
11 years 10 months ago
2012
ACM
Many techniques for improving search result quality have been proposed. Typically, these techniques increase average effectiveness by devising advanced ranking features and/or by...