2514 search results - page 247 / 503 » On the Computation of Approximations of Database Queries |
205
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CIKM
2009
Springer
16 years 1 months ago
2009
Springer
We study the problem of continuous monitoring of top-k queries over multiple non-synchronized streams. Assuming a sliding window model, this general problem has been a well addres...
180
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VLDB
2001
ACM
15 years 11 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...
167
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VLDB
2001
ACM
15 years 11 months ago
2001
ACM
Similarity retrieval mechanisms should utilize generalized quadratic form distance functions as well as the Euclidean distance function since ellipsoid queries parameters may vary...
193
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NAR
2008
15 years 6 months ago
2008
In the major animal model species like mouse, fish or fly, detailed spatial information on gene expression over time can be acquired through whole mount in situ hybridization expe...
151
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ICDM
2007
IEEE
16 years 1 months ago
2007
IEEE
Data mining algorithms use various Trie and bitmap-based representations to optimize the support (i.e., frequency) counting performance. In this paper, we compare the memory requi...