public virtual void Transpose(IFitnessFunction <double[], double[]> function)
{
double[] newLocation;
var restart = _sinceLastImprovement == _iterationsToRestart;
if (restart)
{
newLocation = RandomGenerator.GetInstance().RandomVector(CurrentState.Location.Length, Bounds);
_sinceLastImprovement = 0;
}
else
{
newLocation = GetClampedLocation(CurrentState.Location.Select((x, i) => x + Velocity[i]).ToArray());
}
var newVal = function.Evaluate(newLocation);
var oldBest = PersonalBest;
CurrentState = new ParticleState(newLocation, newVal);
if (Optimization.IsBetter(newVal, PersonalBest.FitnessValue) < 0)
{
PersonalBest = CurrentState;
_sinceLastImprovement = 0;
}
else
{
_sinceLastImprovement++;
}
}
private ParticleState BestNeighborState()
{
ParticleState best = Neighborhood[0].PersonalBest;
foreach (var particle in Neighborhood)
{
if (Optimization.IsBetter(particle.PersonalBest.FitnessValue, best.FitnessValue) < 0)
{
best = particle.PersonalBest;
}
}
return(best);
}
private bool CurrentIsBetterThanBest()
{
return(Optimization.IsBetter(CurrentState.FitnessValue, PersonalBest.FitnessValue) < 0);
}
