1091 search results - page 43 / 219 » Approximation in Databases |
192
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ICDT
2009
ACM
16 years 16 days ago
2009
ACM
In this paper we investigate algorithms and lower bounds for summarization problems over a single pass data stream. In particular we focus on histogram construction and K-center c...
ICPR
2008
IEEE
15 years 6 months ago
2008
IEEE
Graphs are powerful data structures that have many attractive properties for object representation. However, some basic operations are difficult to define and implement, for ins...
182
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ICDE
2004
IEEE
16 years 1 months ago
2004
IEEE
The past decade has seen a wealth of research on time series representations, because the manipulation, storage, and indexing of large volumes of raw time series data is impractic...
191
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ICDE
2008
IEEE
16 years 1 months ago
2008
IEEE
We introduce a convoy query that retrieves all convoys from historical trajectories, each of which consists of a set of objects that travelled closely during a certain time period....
ICDE
2007
IEEE
15 years 6 months ago
2007
IEEE
Existing index selection tools rely on heuristics to efficiently search within the large space of alternative solutions and to minimize the overhead of using the query optimizer ...