620 search results - page 51 / 124 » Algorithms for Rewriting Aggregate Queries Using Views |
175
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TC
2011
14 years 11 months ago
2011
— Processing the gathered information efficiently is a key functionality for wireless sensor networks. In this article, we study the time complexity, message complexity (number ...
154
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VIP
2001
15 years 6 months ago
2001
Bar charts and pie charts are traditional ways of displaying trends and proportions in a data set. However, static charts don't scale well. We introduce a technique which doe...
259
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GIS
2004
ACM
16 years 5 months ago
2004
ACM
Spatial, temporal and spatio-temporal aggregates over continuous streams of remotely sensed image data build a fundamental operation in many applications in the environmental scie...
126
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SAC
2006
ACM
15 years 10 months ago
2006
ACM
In the paper we describe the problem of grouping and aggregation in the concept-oriented data model. The model is based on ordering its elements within a hierarchical multidimensi...
249
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SYRCODIS
2008
15 years 6 months ago
2008
In the last few years, XML became a de-facto standard for the exchange of structured and semi-structured data. The database research community took this development into account b...