public override IOperation Apply()
{
ItemList <IItem> tabuList = TabuListParameter.ActualValue;
double moveQuality = MoveQualityParameter.ActualValue.Value;
bool useAspiration = UseAspirationCriterion.Value;
bool isTabu = false;
PotvinTwoOptStarMove move = TwoOptStarMoveParameter.ActualValue;
List <int> segmentX1;
List <int> segmentX2;
PotvinTwoOptStarMoveMaker.GetSegments(move, out segmentX1, out segmentX2);
foreach (IItem tabuMove in tabuList)
{
PotvinTwoOptStarMoveAttribute attribute = tabuMove as PotvinTwoOptStarMoveAttribute;
if (attribute != null)
{
double distance = 0;
if (MoveDistanceParameter.ActualValue != null)
{
distance = MoveDistanceParameter.ActualValue.Value;
}
double overload = 0;
if (MoveOverloadParameter.ActualValue != null)
{
overload = MoveOverloadParameter.ActualValue.Value;
}
double tardiness = 0;
if (MoveTardinessParameter.ActualValue != null)
{
tardiness = MoveTardinessParameter.ActualValue.Value;
}
IVRPProblemInstance instance = ProblemInstanceParameter.ActualValue;
double quality = attribute.Distance * instance.DistanceFactor.Value;
IHomogenousCapacitatedProblemInstance cvrp = instance as IHomogenousCapacitatedProblemInstance;
if (cvrp != null)
{
quality += attribute.Overload * cvrp.OverloadPenalty.Value;
}
ITimeWindowedProblemInstance vrptw = instance as ITimeWindowedProblemInstance;
if (vrptw != null)
{
quality += attribute.Tardiness * vrptw.TardinessPenalty.Value;
}
if (!useAspiration || moveQuality >= quality)
{
if (attribute.Tour == move.Tour1 && segmentX2.Contains(attribute.City) ||
attribute.Tour == move.Tour2 && segmentX1.Contains(attribute.City))
{
isTabu = true;
break;
}
if (attribute.Distance == distance && attribute.Overload == overload && attribute.Tardiness == tardiness)
{
isTabu = true;
break;
}
}
}
}
MoveTabuParameter.ActualValue = new BoolValue(isTabu);
return(base.Apply());
}
public override IOperation Apply()
{
ItemList <IItem> tabuList = TabuListParameter.ActualValue;
int tabuTenure = TabuTenureParameter.ActualValue.Value;
int overlength = tabuList.Count - tabuTenure;
if (overlength >= 0)
{
for (int i = 0; i < tabuTenure - 1; i++)
{
tabuList[i] = tabuList[i + overlength + 1];
}
while (tabuList.Count >= tabuTenure)
{
tabuList.RemoveAt(tabuList.Count - 1);
}
}
double distance = 0;
if (DistanceParameter.ActualValue != null)
{
distance = DistanceParameter.ActualValue.Value;
}
double overload = 0;
if (OverloadParameter.ActualValue != null)
{
overload = OverloadParameter.ActualValue.Value;
}
double tardiness = 0;
if (TardinessParameter.ActualValue != null)
{
tardiness = TardinessParameter.ActualValue.Value;
}
PotvinTwoOptStarMove move = TwoOptStarMoveParameter.ActualValue;
double moveQuality = MoveQualityParameter.ActualValue.Value;
double quality = QualityParameter.ActualValue.Value;
double baseQuality = moveQuality;
if (quality < moveQuality)
{
baseQuality = quality; // we make an uphill move, the lower bound is the solution quality
}
List <int> segmentX1;
List <int> segmentX2;
PotvinTwoOptStarMoveMaker.GetSegments(move, out segmentX1, out segmentX2);
foreach (int city in segmentX1)
{
tabuList.Add(new PotvinTwoOptStarMoveAttribute(baseQuality, move.Tour1, city, distance, overload, tardiness));
}
foreach (int city in segmentX2)
{
tabuList.Add(new PotvinTwoOptStarMoveAttribute(baseQuality, move.Tour2, city, distance, overload, tardiness));
}
return(base.Apply());
}