public static void Improve(Permutation assignment, DoubleMatrix weights, DoubleMatrix distances, DoubleValue quality, IntValue localIterations, IntValue evaluatedSolutions, bool maximization, int maxIterations, CancellationToken cancellation)
{
for (int i = localIterations.Value; i < maxIterations; i++)
{
TranslocationMove bestMove = null;
double bestQuality = 0; // we have to make an improvement, so 0 is the baseline
double evaluations = 0.0;
foreach (var move in ExhaustiveInsertionMoveGenerator.Generate(assignment))
{
double moveQuality = QAPTranslocationMoveEvaluator.Apply(assignment, move, weights, distances);
int min = Math.Min(move.Index1, move.Index3);
int max = Math.Max(move.Index2, move.Index3 + (move.Index2 - move.Index1));
evaluations += 2.0 * (max - min + 1) / assignment.Length
+ 4.0 * (assignment.Length - (max - min + 1)) / assignment.Length;
if (maximization && moveQuality > bestQuality ||
!maximization && moveQuality < bestQuality)
{
bestQuality = moveQuality;
bestMove = move;
}
}
evaluatedSolutions.Value += (int)Math.Ceiling(evaluations);
if (bestMove == null)
{
break;
}
TranslocationManipulator.Apply(assignment, bestMove.Index1, bestMove.Index2, bestMove.Index3);
quality.Value += bestQuality;
localIterations.Value++;
cancellation.ThrowIfCancellationRequested();
}
}
protected QAPTranslocationMoveEvaluator(QAPTranslocationMoveEvaluator original, Cloner cloner)
: base(original, cloner)
{
}
protected QAPTranslocationMoveEvaluator(QAPTranslocationMoveEvaluator original, Cloner cloner)
: base(original, cloner) {
}