@Override
public double getPercentageCompleted(PSO algorithm) {
DiameterVisitor diameterVisitor = new DiameterVisitor();
algorithm.accept(diameterVisitor);
double diameter = diameterVisitor.getResult();
if (diameter <= minimumSwarmDiameter) {
return 1;
}
return minimumSwarmDiameter / diameter;
}
/** {@inheritDoc} */
public Real getValue(Algorithm algorithm) {
PSO pso = (PSO) algorithm;
int numberParticles = pso.getTopology().size();
Iterator<Particle> k = pso.getTopology().iterator();
Particle particle = k.next();
Vector averageParticlePosition = (Vector) particle.getPosition().getClone();
while (k.hasNext()) {
particle = k.next();
Vector v = (Vector) particle.getPosition();
for (int j = 0; j < averageParticlePosition.size(); ++j) {
averageParticlePosition.setReal(
j, averageParticlePosition.doubleValueOf(j) + v.doubleValueOf(j));
}
}
for (int j = 0; j < averageParticlePosition.size(); ++j) {
averageParticlePosition.setReal(
j, averageParticlePosition.doubleValueOf(j) / numberParticles);
}
Iterator<Particle> i = pso.getTopology().iterator();
double particleSum = 0.0;
while (i.hasNext()) {
particle = i.next();
double dimensionSum = 0.0;
Vector v = (Vector) particle.getPosition();
for (int j = 0; j < particle.getDimension(); ++j) {
dimensionSum +=
(v.doubleValueOf(j) - averageParticlePosition.doubleValueOf(j))
* (v.doubleValueOf(j) - averageParticlePosition.doubleValueOf(j));
}
particleSum += Math.sqrt(dimensionSum);
}
double diversity = particleSum / numberParticles;
DiameterVisitor diameterVisitor = new DiameterVisitor();
pso.accept(diameterVisitor);
double diameter = diameterVisitor.getResult();
return Real.valueOf(diversity / diameter);
}
@Override
public boolean apply(PSO input) {
DiameterVisitor diameterVisitor = new DiameterVisitor();
input.accept(diameterVisitor);
return (diameterVisitor.getResult() <= minimumSwarmDiameter);
}