/// <summary>
/// Expanded pont kiszámítása
/// </summary>
/// <param name="reflected"></param>
/// <param name="centroid"></param>
/// <returns></returns>
private BaseElement Expanded(BaseElement reflected, BaseElement centroid)
{
var parameter = new ArrayList();
for (int p = 0; p < InitialParameters.Count; p++)
{
parameter.Add((gamma * (double)reflected[p]) + ((1 - gamma) * (double)centroid[p]));
if ((double)parameter[p] > (double)UpperParamBounds[p])
{
parameter[p] = UpperParamBounds[p];
}
else if ((double)parameter[p] < (double)LowerParamBounds[p])
{
parameter[p] = LowerParamBounds[p];
}
if (Integer[p])
{
parameter[p] = Math.Round((double)parameter[p]);
}
}
return((BaseElement)GetNewElement(FitnessFunction, parameter));
}
/// <summary>
/// Contracted pont kiszámítása
/// </summary>
/// <param name="centroid"></param>
/// <returns></returns>
private BaseElement Contracted(BaseElement centroid)
{
var parameter = new ArrayList();
var worstParam = ((BaseElement)Elements[NumberOfElements - 1]).Position;
for (int p = 0; p < InitialParameters.Count; p++)
{
parameter.Add((beta * (double)worstParam[p]) + ((1 - beta) * (double)centroid[p]));
if ((double)parameter[p] > (double)UpperParamBounds[p])
{
parameter[p] = UpperParamBounds[p];
}
else if ((double)parameter[p] < (double)LowerParamBounds[p])
{
parameter[p] = LowerParamBounds[p];
}
if (Integer[p])
{
parameter[p] = Math.Round((double)parameter[p]);
}
}
return((BaseElement)GetNewElement(FitnessFunction, parameter));
}
protected override void CreateNextGeneration()
{
BaseElement centroid = Centroid();
BaseElement reflected = Reflected(centroid);
if (reflected.Fitness < ((BaseElement)Elements[0]).Fitness)
{
BaseElement expanded = Expanded(reflected, centroid);
if (expanded.Fitness < ((BaseElement)Elements[0]).Fitness)
{
ReplaceWorst(expanded);
}
else
{
ReplaceWorst(reflected);
}
}
if (IsWorseThanAllButWorst(reflected))
{
if (reflected.Fitness <= ((BaseElement)Elements[NumberOfElements - 1]).Fitness)
{
ReplaceWorst(reflected);
}
BaseElement contracted = Contracted(centroid);
if (contracted.Fitness < ((BaseElement)Elements[0]).Fitness)
{
ReplaceWorst(contracted);
}
else
{
Shrink();
}
return;
}
ReplaceWorst(reflected);
}
/// <summary>
/// Legrosszab érték beállítása és az egyedek rendezése
/// </summary>
/// <param name="newSolution"></param>
private void ReplaceWorst(BaseElement newSolution)
{
Elements[NumberOfElements - 1] = newSolution;
Elements.Sort();
}