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Code Issues Releases Wiki Activity

make noise maker reproducable

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oblonski 2015-09-24 15:46:27 +02:00
parent 461bcfbc0b
commit 1ece0e6819
1 changed files with 10 additions and 2 deletions
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12
jsprit-core/src/main/java/jsprit/core/algorithm/box/InsertionNoiseMaker.java
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@ -32,12 +32,20 @@ class InsertionNoiseMaker implements SoftActivityConstraint, IterationStartsList
private double noiseLevel = 0.1;
private Random random = RandomNumberGeneration.getRandom();
private Random random = RandomNumberGeneration.newInstance();
private Random[] randomArray;
public InsertionNoiseMaker(VehicleRoutingProblem vrp, double noiseLevel, double noiseProbability) {
this.vrp = vrp;
this.noiseLevel = noiseLevel;
this.noiseProbability = noiseProbability;
randomArray = new Random[vrp.getNuActivities()+2];
for(int i=0;i<randomArray.length;i++){
Random r = new Random();
r.setSeed(random.nextLong());
randomArray[i] = r;
}
determineMaxCosts(vrp);
}
@ -79,7 +87,7 @@ class InsertionNoiseMaker implements SoftActivityConstraint, IterationStartsList
@Override
public double getCosts(JobInsertionContext iFacts, TourActivity prevAct, TourActivity newAct, TourActivity nextAct, double prevActDepTime) {
if (makeNoise) {
return noiseLevel * maxCosts * random.nextDouble();
return noiseLevel * maxCosts * randomArray[newAct.getIndex()].nextDouble();
}
return 0;
}