Exemplo n.º 1
0
 @Override
 public void offerSolution() {
   FitInstance<Instance> solution = task.getFitInstance(stats.getBestInstance());
   System.out.println("Offering solution with f = " + solution.getFitness());
   otherAlgorithms
       .get(ThreadLocalRandom.current().nextInt(otherAlgorithms.size()))
       .acceptSolution(solution);
 }
Exemplo n.º 2
0
  protected Edge addChildToBest(Instance instance) {
    List<MutatedInstanceMetaData<Instance, MutationType>> offspring =
        crossover.apply(stats.getBestInstance(), instance);
    FitInstance<Instance> md0 = task.getFitInstance(offspring.get(0).getInstance());
    FitInstance<Instance> md1 = task.getFitInstance(offspring.get(1).getInstance());
    if (md0.getFitness() > md1.getFitness()) {
      return graph.addNode(
          stats.getBestNode(),
          offspring.get(0).getMutations(),
          md0,
          task.getNumberOfFitnessEvaluations());
    }

    return graph.addNode(
        stats.getBestNode(),
        offspring.get(1).getMutations(),
        md1,
        task.getNumberOfFitnessEvaluations());
  }
Exemplo n.º 3
0
  @Override
  protected List<Node<Instance>> getStartNodes() {
    List<Node<Instance>> startNodes = super.getStartNodes();

    if (!offeredSolutions.isEmpty()) {
      startNodes.remove(0);
      FitInstance<Instance> bestOfferedSolution = Collections.max(offeredSolutions);
      offeredSolutions.clear();

      Node<Instance> node = addChildToBest(bestOfferedSolution.getInstance()).getDest();
      System.out.println(
          "Crossover ("
              + stats.getBestFitness()
              + ", "
              + bestOfferedSolution.getFitness()
              + ") best child fitness = "
              + node.getFitness());
      startNodes.add(node);
    }
    return startNodes;
  }