Exemple #1
0
  public static void main(String[] args) throws Exception {
    CrossoverOperator<BinarySolution> crossoverOperator;
    MutationOperator<BinarySolution> mutationOperator;
    SelectionOperator<List<BinarySolution>, BinarySolution> parentsSelection;
    SelectionOperator<List<BinarySolution>, List<BinarySolution>> newGenerationSelection;
    Algorithm<List<BinarySolution>> algorithm;

    BinaryProblem problem;

    String problemName;
    if (args.length == 1) {
      problemName = args[0];
    } else {
      problemName = "org.uma.jmetal.problem.multiobjective.zdt.ZDT5";
    }

    problem = (BinaryProblem) ProblemUtils.<BinarySolution>loadProblem(problemName);

    crossoverOperator = new HUXCrossover(1.0);
    parentsSelection = new RandomSelection<BinarySolution>();
    newGenerationSelection = new RankingAndCrowdingSelection<BinarySolution>(100);
    mutationOperator = new BitFlipMutation(0.35);

    algorithm =
        new MOCHCBuilder(problem)
            .setInitialConvergenceCount(0.25)
            .setConvergenceValue(3)
            .setPreservedPopulation(0.05)
            .setPopulationSize(100)
            .setMaxEvaluations(25000)
            .setCrossover(crossoverOperator)
            .setNewGenerationSelection(newGenerationSelection)
            .setCataclysmicMutation(mutationOperator)
            .setParentSelection(parentsSelection)
            .setEvaluator(new SequentialSolutionListEvaluator<BinarySolution>())
            .build();

    AlgorithmRunner algorithmRunner = new AlgorithmRunner.Executor(algorithm).execute();

    List<BinarySolution> population = ((MOCHC) algorithm).getResult();
    long computingTime = algorithmRunner.getComputingTime();

    new SolutionSetOutput.Printer(population)
        .setSeparator("\t")
        .setVarFileOutputContext(new DefaultFileOutputContext("VAR.tsv"))
        .setFunFileOutputContext(new DefaultFileOutputContext("FUN.tsv"))
        .print();

    JMetalLogger.logger.info("Total execution time: " + computingTime + "ms");
    JMetalLogger.logger.info("Objectives values have been written to file FUN.tsv");
    JMetalLogger.logger.info("Variables values have been written to file VAR.tsv");
  }
Exemple #2
0
  public static void singleRun(String pro, String referencePareto) {
    Problem<DoubleSolution> problem;
    Algorithm<List<DoubleSolution>> algorithm;
    CrossoverOperator<DoubleSolution> crossover;
    MutationOperator<DoubleSolution> mutation;
    SelectionOperator<List<DoubleSolution>, DoubleSolution> selection;
    String referenceParetoFront = "";

    String problemName;
    if (!pro.isEmpty()
        && !referencePareto.isEmpty()
        && pro.trim() != null
        && referencePareto.trim() != null) {
      problemName = pro;
      referenceParetoFront = referencePareto;
    } else {
      problemName = "problem.multiobjective.zdt.ZDT1";
      referenceParetoFront = "problem/src/test/resources/pareto_fronts/ZDT1.pf";
    }

    problem = ProblemUtils.<DoubleSolution>loadProblem(problemName);

    int iterations;
    String mobi;
    if (problem.getNumberOfObjectives() == 2) {
      iterations = 300;
      mobi = "mombi2-weights/weight/weight_02D_152.sld";
    } else {
      iterations = 500;
      mobi = "mombi2-weights/weight/weight_03D_12.sld";
    }

    double crossoverProbability = 0.9;
    double crossoverDistributionIndex = 20.0;
    crossover = new SBXCrossover(crossoverProbability, crossoverDistributionIndex);

    double mutationProbability = 1.0 / problem.getNumberOfVariables();
    double mutationDistributionIndex = 20.0;
    mutation = new PolynomialMutation(mutationProbability, mutationDistributionIndex);

    selection =
        new BinaryTournamentSelection<DoubleSolution>(
            new RankingAndCrowdingDistanceComparator<DoubleSolution>());

    algorithm =
        new MOMBI2<>(
            problem,
            iterations,
            crossover,
            mutation,
            selection,
            new SequentialSolutionListEvaluator<DoubleSolution>(),
            mobi);
    AlgorithmRunner algorithmRunner = new AlgorithmRunner.Executor(algorithm).execute();

    List<DoubleSolution> population = algorithm.getResult();
    long computingTime = algorithmRunner.getComputingTime();

    JMetalLogger.logger.info("Total execution time: " + computingTime + "ms");

    printFinalSolutionSet(population);
    if (!referenceParetoFront.equals("")) {
      printQualityIndicators(population, referenceParetoFront);
    }
  }