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BNCOD
1997
76views Database» more  BNCOD 1997»
15 years 7 months ago
Query Evaluation in CROQUE - Calculus and Algebra Coincide
With the substantial change of declarative query languages from plain SQL to the so-called \object SQLs", in particular OQL, there has surprisingly been not much change in the...
Torsten Grust, Joachim Kröger, Dieter Gluche,...
ICDE
2003
IEEE
105views Database» more  ICDE 2003»
16 years 7 months ago
Efficient Creation of Statistics over Query Expressions
Query optimizers use base-table statistics to derive statistics on the sub-plans that are enumerated during optimization. In practice, traditional optimizers rely on a number of s...
Nicolas Bruno, Surajit Chaudhuri
ADHOCNOW
2008
Springer
15 years 7 months ago
An Energy-Efficient Query Aggregation Scheme for Wireless Sensor Networks
This paper presents a novel method for optimizing sliding window based continuous queries. We deal with two categories of aggregation operations: stepwise aggregation (e.g. COUNT) ...
Jun-Zhao Sun
OTM
2007
Springer
16 years 19 days ago
An Ontology-Driven Architecture for Re-using Semantic Web Services
As more semantic web services become on the Internet, it is feasible that users collaborate among them to save efforts in complex web solutions by sharing and reusing existing sema...
Carlos Granell, Dolores María Llidó,...
IJCAI
2007
15 years 8 months ago
Exploiting Image Contents in Web Search
Web search is a challenging task. Previous research mainly exploits texts on the Web pages or link information between the pages, while multimedia information is largely ignored. ...
Zhi-Hua Zhou, Hong-Bin Dai