Changeset 15572 for branches/GeneralizedQAP/HeuristicLab.Problems.GeneralizedQuadraticAssignment/3.3/Operators/Crossovers/GQAPPathRelinking.cs

Timestamp:

01/03/18 00:28:51 (6 years ago)

Author:

abeham

Message:

#1614:

• fixed a bug in GRASP where solutions in the elite set would be mutated
• introduced termination criteria when reaching best-known quality
• tweaked generating random numbers in StochasticNMoveSingleMoveGenerator
• changed DiscreteLocationCrossover to use an allele from one of the parents instead of introducing a mutation in case no feasible insert location is found
• changed OSGA maxselpress to 500
• slight change to contexts, introduced single-objectiveness much earlier in the class hierachy
  • limited ContextAlgorithm to SingleObjectiveBasicProblems (doesn't matter here)

File:

• branches/GeneralizedQAP/HeuristicLab.Problems.GeneralizedQuadraticAssignment/3.3/Operators/Crossovers/GQAPPathRelinking.cs (modified) (1 diff)

branches/GeneralizedQAP/HeuristicLab.Problems.GeneralizedQuadraticAssignment/3.3/Operators/Crossovers/GQAPPathRelinking.cs

@@ -79 +79 @@
       var sFit = problemInstance.ToSingleObjective(sourceEval);
       var tFit = problemInstance.ToSingleObjective(targetEval);
-      GQAPSolution pi_star = sFit < tFit ? new GQAPSolution(source, sourceEval) : new GQAPSolution(target, targetEval); // line 1 of Algorithm 4
+      GQAPSolution pi_star = sFit < tFit
+        ? new GQAPSolution((IntegerVector)source.Clone(), (Evaluation)sourceEval.Clone())
+        : new GQAPSolution((IntegerVector)target.Clone(), (Evaluation)targetEval.Clone()); // line 1 of Algorithm 4
       double pi_star_Fit = problemInstance.ToSingleObjective(pi_star.Evaluation); // line 2 of Algorithm 4