halfdan/eva2
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

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

Browse Source
This commit is contained in:
Marcel Kronfeld
2008-08-29 14:04:32 +00:00
parent c2a3f06498
commit 68241a0dc0
39 changed files with 1593 additions and 404 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
resources/EvolutionStrategyIPOP.html Normal file
View File

@@ -0,0 +1,30 @@
<html>
<head>
<title>Increasing Population Size ES - IPOP-ES</title>
</head>
<body>
<h1 align="center">Increasing Population Size ES - IPOP-ES</h1>
<center>
</center><br>
<p>
This class implements the IPOP (increased population size) restart strategy ES, which increases
the ES population size (i.e., lambda) after phases of stagnation and then restarts the optimization
by reinitializing the individuals and operators.<br>
Stagnation is for this implementation defined by a FitnessConvergenceTerminator instance
which terminates if the absolute change in fitness is below a threshold (default 10e-12) for a
certain number of generations (default: 10+floor(30*n/lambda) for problem dimension n).
</p>
<p>
If the MutateESRankMuCMA mutation operator is employed, additional criteria are used for restarts,
such as numeric conditions of the covariance matrix.
Lambda is increased multiplicatively for every restart, and typical initial values are
mu=5, lambda=10, incFact=2.
The IPOP-CMA-ES won the CEC 2005 benchmark challenge.
Refer to Auger&Hansen 05 for more details.
</p>
<br>
A.Auger & N.Hansen. <i>A Restart CMA Evolution Strategy With Increasing Population Size</i>. CEC 2005.
</body>
</html>