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JUCS
2007
122views more  JUCS 2007»
13 years 8 months ago
Efficient Access Methods for Temporal Interval Queries of Video Metadata
: Indexing video content is one of the most important problems in video databases. In this paper we present linear time and space algorithms for handling video metadata that repres...
Spyros Sioutas, Kostas Tsichlas, Bill Vassiliadis,...
VLDB
1995
ACM
132views Database» more  VLDB 1995»
14 years 14 days ago
Coloring Away Communication in Parallel Query Optimization
We address the problem of finding parallel plans for SQL queries using the two-phase approach of join ordering and query rewrite (JOQR) followed by parallelization. We focus on t...
Waqar Hasan, Rajeev Motwani
APWEB
2005
Springer
14 years 2 months ago
Multiresolution Query Optimization in an Online Environment
Multiresolution (or multi-scale) techniques make it possible for Web-based GIS applications to access large dataset. The performance of such systems relies on data transmission ove...
Kai Xu 0003, Xiaofang Zhou
VLDB
2001
ACM
190views Database» more  VLDB 2001»
14 years 1 months ago
LEO - DB2's LEarning Optimizer
Most modern DBMS optimizers rely upon a cost model to choose the best query execution plan (QEP) for any given query. Cost estimates are heavily dependent upon the optimizer’s e...
Michael Stillger, Guy M. Lohman, Volker Markl, Mok...
CDC
2008
IEEE
124views Control Systems» more  CDC 2008»
14 years 3 months ago
A proximal center-based decomposition method for multi-agent convex optimization
— In this paper we develop a new dual decomposition method for optimizing a sum of convex objective functions corresponding to multiple agents but with coupled constraints. In ou...
Ion Necoara, Johan A. K. Suykens