4397 search results - page 244 / 880 » Relational Algebra Operations |
142
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RC
1998
15 years 3 months ago
1998
Interval arithmetic is based on the fact that for intervals on the real line, the element-wise product of two intervals is also an interval. This property is not always true: e.g....
136
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CORR
2012
Springer
13 years 12 months ago
2012
Springer
This paper presents a query evaluation technique for positive relational algebra queries with aggregates on a representation system for probabilistic data based on the algebraic s...
228
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SIGMOD
2009
ACM
16 years 4 months ago
2009
ACM
We present a complete XPath cost-based optimization and execution framework and demonstrate its effectiveness and efficiency for a variety of queries and datasets. The framework i...
150
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EDBT
2012
ACM
13 years 6 months ago
2012
ACM
We present an effective optimization framework for general SQLlike map-reduce queries, which is based on a novel query algebra and uses a small number of higher-order physical ope...
144
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GECCO
2003
Springer
15 years 9 months ago
2003
Springer
The performance of genetic programming relies mostly on population-contained variation. If the population diversity is low then there will be a greater chance of the algorithm bein...