goldsteinprice.java

来自「基于差分进化与粒子群混合算法优化源程序,这是一个java语言编制的源程序,很实用」· Java 代码 · 共 32 行

/**
 * Description: GoldsteinPrice(GP) function
 *
 * @ Author        Create/Modi     Note
 * Xiaofeng Xie    Apr 20, 2003
 * Xiaofeng Xie    May 11, 2004
 *
 * @version 1.0
 * @Since MAOS1.0
 *
 * @References:
 * [1] Serra P, Stanton A F, Kais S. Comparison study of pivot methods for global
 *  optimization. J. Chem. Phys, 1997, 106(17): 7170-7177
 */

package problem.unconstrained;

import problem.*;

public class GoldsteinPrice extends UnconstrainedProblemEncoder {
  static final int NX = 2;
  public GoldsteinPrice() throws Exception {
    super(NX);
    setDefaultXAt(0, -2, 2);
    setDefaultXAt(1, -2, 2);
  }

  public double calcTarget(double[] VX) {
    return (1+Math.pow(VX[0]+VX[1]+1, 2)*(19-14*VX[0]+3*VX[0]*VX[0]-14*VX[1]+6*VX[0]*VX[1]+3*VX[1]*VX[1]))*(30+(Math.pow(2*VX[0]-3*VX[1], 2)*(18-32*VX[0]+12*VX[0]*VX[0]+48*VX[1]-36*VX[0]*VX[1]+27*VX[1]*VX[1])));
  }
}