searchpoint.java

用java实现的改进粒子群算法

/**
 * Description: provide the location and encoded goodness information
 *
 * @ Author        Create/Modi     Note
 * Xiaofeng Xie    Mar 1, 2003
 * Xiaofeng Xie    May 11, 2004
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * Please acknowledge the author(s) if you use this code in any way.
 */
package knowledge;

import Global.*;
import space.*;
import encode.*;

public class SearchPoint extends BasicPoint implements IEncodeEngine {
  //store the encode information for goodness evaluation
  //encodeInfo[0]: the sum of constraints (if it equals to 0, then be a feasible point)
  //encodeInfo[1]: the value of objective function
  private double[] encodeInfo = new double[2];

  public SearchPoint(int dim) {
    super(dim);
    for(int i=0; i<encodeInfo.length; i++) {
      encodeInfo[i] = BasicBound.MAXDOUBLE;
    }
  }

  public double[] getEncodeInfo() {
    return encodeInfo;
  }

  private void importEncodeInfo(double[] info) {
    for(int i=0; i<encodeInfo.length; i++) {
      encodeInfo[i] = info[i];
    }
  }

  private void importEncodeInfo(IEncodeEngine point) {
    importEncodeInfo(point.getEncodeInfo());
  }

  //Replace self by given point
  public void importPoint(SearchPoint point) {
    importLocation(point);
    importEncodeInfo(point);
  }

  public void outputSelf() {
    System.out.println("#--> Location:");
    OutputMethods.outputVector(getLocation());
    //Vcon: the weighted constraint violation value (>=0): if Vcon==0, then no violation
    //Vopt: the value of objective function
    System.out.println("#--> (Vcon & Vopt):");
    OutputMethods.outputVector(getEncodeInfo());
  }
}