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Larger commit, adding IPOP-ES and RankMuCMA mutator. Revs. 130-174 from MK-branch should be merged with this.

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Marcel Kronfeld
2008-08-29 14:04:32 +00:00
parent c2a3f06498
commit 68241a0dc0
39 changed files with 1593 additions and 404 deletions
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resources/EvolutionStrategies.html
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<title>Evolution Strategy - ES</title>
</head>
<body>
<EFBFBD>
<h1 align="center">Evolution Strategy - ES</h1>
<center>
</center><br>
An ES works on a population of real valued solutions
by repeated use of evolutionary operators like reproduction,
recombination and mutation (see pseudocode in figures.
lambda offspring individuals are generated from mu parents
by recombination and mutation. After evaluating the fitness of the lambda
offspring individuals, mu individuals with the best fitness are
selected by a comma-strategy to build the parent population for the next generation.
On the other hand, a plus-strategy selects the best mu individuals
from the aggregation of parents and offspring individuals.
The properties of ES are given in the population sub frame.
recombination and mutation.
&lambda; offspring individuals are generated from &mu; parents
by recombination and mutation (with &mu; &lt; &lambda;).
<br>
After evaluating the fitness of the &lambda;
offspring individuals, the comma-strategy selects the &mu; individuals
with the best fitness as parent population for the next generation.
On the other hand, a plus-strategy selects the best &mu; individuals
from the aggregation of parents and offspring individuals, so in this
case the best individual is guaranteed to survive.
In general, however, the comma-strategy is more robust and can easier
escape from local optima, which is why it is usually the standard selection.
<br>
</body>
</html>