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» Optimization strategies for complex queries
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GECCO
2008
Springer
124views Optimization» more  GECCO 2008»
14 years 11 months ago
Aiming for a theoretically tractable CSA variant by means of empirical investigations
Evolution Strategies (ES) for black-box optimization of a function f : Rn → R are investigated. Namely, we consider the cumulative step-size adaptation (CSA) for the variance of...
Jens Jägersküpper, Mike Preuss
PODS
2006
ACM
196views Database» more  PODS 2006»
15 years 10 months ago
The containment problem for REAL conjunctive queries with inequalities
Query containment is a fundamental algorithmic problem in database query processing and optimization. Under set semantics, the query-containment problem for conjunctive queries ha...
T. S. Jayram, Phokion G. Kolaitis, Erik Vee
GLOBECOM
2007
IEEE
15 years 4 months ago
Performance Analysis of V-BLAST with Optimum Power Allocation
—Comprehensive performance analysis of the unordered V-BLAST algorithm with various power allocation strategies is presented, which makes use of analytical tools and resorts to M...
Victoria Kostina, Sergey Loyka
SIGMOD
1996
ACM
120views Database» more  SIGMOD 1996»
15 years 2 months ago
Implementing Data Cubes Efficiently
Decision support applications involve complex queries on very large databases. Since response times should be small, query optimization is critical. Users typically view the data ...
Venky Harinarayan, Anand Rajaraman, Jeffrey D. Ull...
CIDR
2003
106views Algorithms» more  CIDR 2003»
14 years 11 months ago
Speculative Query Processing
Speculation is an every day phenomenon whereby one acts in anticipation of particular conditions that are likely to hold in the future. Computer science research has seen many suc...
Neoklis Polyzotis, Yannis E. Ioannidis