probupdator.java

pso源程序

/**
 * Description: Updating A as B only as state B have noworse goodness value.
 *
 * @ Author        Create/Modi     Note
 * Xiaofeng Xie    Apr 28, 2006    MAOS-TSP Beta 1.1.002
 *
 * @version 1.0
 * @Since MAOS-TSP Beta 1.1.002
 */

package maosKernel.behavior.update;

import Global.methods.*;
import Global.basic.nodes.utilities.*;

import maosKernel.memory.*;

public class ProbUpdator extends AbsUpdator {
  private double pDirect = 1;

  public ProbUpdator() {}

  public void setPDirect(int pDirect) {
    this.pDirect = pDirect;
  }

  public void initUtilities() {
    super.initUtilities();
    initUtility(new DoubleUtility("pDirect", pDirect));
  }

  public void shortcutInit() throws Exception {
    super.shortcutInit();
    pDirect = TypeConverter.toDouble(getValue("pDirect"));
  }

  public boolean updateBehavior(EncodedState acceptPoint, EncodedState donatePoint) {
    if (Math.random()<pDirect) {
      acceptPoint.importEncodeState(donatePoint);
      return true;
    }
    return false;
  }
}