Example #1
0
 private CenterObject getCross(CenterObject center, int index) {
   float c = getC();
   CenterObject cross = new CenterObject();
   for (int i = 0; i < k; i++) {
     Double rand = Math.random();
     boolean flag = rand > c;
     if (flag) {
       cross.getObjs().add(centers.get(index).getObjs().get(i));
     } else {
       cross.getObjs().add(vCenters.get(index).getObjs().get(i));
     }
   }
   return cross;
 }
Example #2
0
  private CenterObject getMutant(CenterObject center, float f) {
    CenterObject mutant = new CenterObject();
    int a = (int) (Math.random() * n);
    int b = (int) (Math.random() * n);
    int c = (int) (Math.random() * n);
    //		System.out.println("a b c:" + a + " " + b + " " + c);
    DataObject objA = objects.get(a);
    DataObject objB = objects.get(b);
    DataObject objC = objects.get(c);

    DataObject obj;
    for (int i = 0; i < k; i++) {
      int year = (int) (objA.getYear() + f * (objB.getYear() - objC.getYear()));
      double ratio1 = objA.getRatio1() + f * (objB.getRatio1() - objC.getRatio1());
      double ratio2 = objA.getRatio2() + f * (objB.getRatio2() - objC.getRatio2());
      obj = new DataObject();
      obj.setYear(year);
      obj.setRatio1(ratio1);
      obj.setRatio2(ratio2);
      mutant.getObjs().add(obj);
      System.out.println("Mutant " + i);
      printCenter(mutant);
    }

    return mutant;
  }
Example #3
0
  private void execute() {
    // step 1
    System.out.println("step 1");
    init();
    while (t < T_MAX) {
      // step 2
      System.out.println("step 2");
      for (CenterObject center : centers) {
        center.setFitness(getFitness(center));
      }

      // step 3
      System.out.println("step 3");
      Float f = getF();
      System.out.println("F is: " + f);
      for (CenterObject center : centers) {
        vCenters.add(getMutant(center, f));
      }

      // step 4
      System.out.println("step 4");
      for (int index = 0; index < centers.size(); index++) {
        CenterObject center = centers.get(index);
        uCenters.add(getCross(center, index));
      }

      // step 5
      System.out.println("step 5");
      for (CenterObject uCenterObject : uCenters) {
        uCenterObject.setFitness(getFitness(uCenterObject));
      }
      for (int i = 0; i < centers.size(); i++) {
        if (uCenters.get(i).getFitness() < centers.get(i).getFitness()) {
          centers.set(i, uCenters.get(i));
        }
      }

      // step 6
      System.out.println("step 6");
      t++;
    }

    // step 7
    System.out.println("step 7");
    float minFit = Float.MAX_VALUE;
    int pos = 0;
    for (int i = 0; i < centers.size(); i++) {
      if (centers.get(i).getFitness() < minFit) {
        minFit = centers.get(i).getFitness();
        pos = i;
      }
    }
    System.out.println("Center Index:" + pos);

    CenterObject co = originalCenters.get(pos);
    for (DataObject obj : co.getObjs()) {
      System.out.println(obj);
    }
  }
Example #4
0
 private float getFitness(CenterObject center) {
   float fitness = 0.0F;
   for (DataObject c : center.getObjs()) {
     for (DataObject obj : objects) {
       fitness +=
           (obj.getYear() - c.getYear()) * (obj.getYear() - c.getYear())
               + (obj.getRatio1() - c.getRatio1()) * (obj.getRatio1() - c.getRatio1())
               + (obj.getRatio2() - c.getRatio2()) * (obj.getRatio2() - c.getRatio2());
     }
   }
   System.out.println("Fitness:" + fitness);
   return fitness;
 }
Example #5
0
  // initialize centers
  @SuppressWarnings("unchecked")
  private void initCentersList() {

    centers = new ArrayList<>();
    Set<DataObject> doSet = new HashSet<DataObject>();
    for (int i = 0; i < np; i++) {
      doSet.clear();
      // select 3 objs to form a center set
      while (doSet.size() < 3) {
        int index = (int) (Math.random() * n);
        doSet.add(objects.get(index));
      }
      CenterObject center = new CenterObject();
      center.getObjs().addAll(doSet);
      centers.add(center);
    }
    originalCenters = (ArrayList<CenterObject>) centers.clone();
    System.out.println("Original Centers Size:" + originalCenters.size());
  }
Example #6
0
 private void printCenter(CenterObject center) {
   for (DataObject obj : center.getObjs()) {
     System.out.println(obj);
   }
 }