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» On the Computation of Approximations of Database Queries

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SIGMOD
2008
ACM

236views Database» more SIGMOD 2008»

Approximate embedding-based subsequence matching of time series

14 years 7 months ago

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A method for approximate subsequence matching is introduced, that significantly improves the efficiency of subsequence matching in large time series data sets under the dynamic ti...

Vassilis Athitsos, Panagiotis Papapetrou, Michalis...

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WWW
2009
ACM

163views Internet Technology» more WWW 2009»

Answering approximate queries over autonomous web databases

14 years 8 months ago

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To deal with the problem of empty or too little answers returned from a Web database in response to a user query, this paper proposes a novel approach to provide relevant and rank...

Xiangfu Meng, Z. M. Ma, Li Yan

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PPAM
2005
Springer

102views Distributed And Parallel Com...» more PPAM 2005»

Parallel Query Processing and Edge Ranking of Graphs

14 years 26 days ago

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Abstract. In this paper we deal with the problem of ﬁnding an optimal query execution plan in database systems. We improve the analysis of a polynomial-time approximation algorit...

Dariusz Dereniowski, Marek Kubale

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SIGMOD
2009
ACM

91views Database» more SIGMOD 2009»

Secondary-storage confidence computation for conjunctive queries with inequalities

14 years 7 months ago