functionfitness.java

基于求函数f(x,y,z)=xyz*sin(xyz)最大值问题的演示程序 解压后在命令行输入：java -jar genetic_algorithm.jar

package edu.zsu.zouang.genetic;

/**
 * 计算xyz*sin(xyz)最大值的遗传函数适应值
 * 2007-4-25
 * @author Zou Ang
 * Contact <a href ="mailto:[e-mail]">Zou Ang</a>
 */
public class FunctionFitness implements FitnessCalculate {

	
	public double calculate(char[] chromosome) {
		/*
		 * x、y、z都用8位来编码，即x,y,z都属于[0,255]
		 */
		double x = 0;
		double y = 0;
		double z = 0;
		for(int i = 0; i < 8; i++){
			int j = i + 8;
			int k = i + 16;
			x = x + Math.pow(2, 7 - i) * (Integer.valueOf(chromosome[i]) - 48);
			y = y + Math.pow(2, 7 - i) * (Integer.valueOf(chromosome[j]) - 48);
			z = z + Math.pow(2, 7 - i) * (Integer.valueOf(chromosome[k]) - 48);
		}
		return x * y * z * Math.sin(x*y*z);
	}

}