public double[] Evaluate(double[] x)
{
var state = new ParticleState(x, Calculate(x));
if (BestEvaluation == null || _optimization.IsBetter(state.FitnessValue, BestEvaluation.FitnessValue) < 0)
{
BestEvaluation = state;
}
EvaluationsCount++;
return(state.FitnessValue);
}
private bool _conditionCheck()
{
var currentBest = GetCurrentBest();
if (_optimizer.IsBetter(currentBest.FitnessValue, _globalBest.FitnessValue) < 0)
{
_iterationsSinceImprovement = 0;
_globalBest = new ParticleState(currentBest.Location, currentBest.FitnessValue);
}
else
{
_iterationsSinceImprovement++;
}
return
((!_parameters.IterationsLimitCondition || _iteration++ < _parameters.Iterations)
&&
(!_parameters.TargetValueCondition ||
!(_optimizer.AreClose(new [] { _parameters.TargetValue }, _fitnessFunction.BestEvaluation.FitnessValue, _parameters.Epsilon)))
&&
_iterationsSinceImprovement < _parameters.PsoIterationsToRestart
);
}
