the de jong functions f1 - f5.txt

De Jong函数F1－F5的java源码

/************************************************************
;                                                           *
;  William M. Spears					    *
;  Navy Center for Applied Research in AI                   *
;  Naval Research Laboratory                                *
;                                                           *
;  Permission is hereby granted to copy all or any part of  *
;  this program for free distribution.			    *
;                                                           *
;************************************************************/

/* Decode the bit string */

int decode(i, j, k)
int i, j, k;
{
   int sum, x, n;

   sum = 0;
   n = 1;
   for (x = k - j; x >= 0; x--) {
     if (c[i][x + j] == 1) {
       sum = sum + n;
     }
     n = n * 2;
   }
   return(sum);
}


/* 3 variables, 10 bits/variable. */

double f1 (i)
int i;
{
	register int x;
	double sum, pow();

	solution = 78.6;

	sum = 0.0;
	for (x = 0; x <= 2; x++) {
	  sum = sum + pow(((double)(decode(i, (x * 10) + 1, (x * 10) + 10) - 512) / 100.0),			  2.0);
	}

	return(solution - sum);
};

/* 2 variables, 12 bits/variable. */

double f2 (i)
int i;
{
        double x1, x2;
	double pow();

	solution = 3905.93;

	x1 = (double)(decode(i, 1, 12) - 2048) / 1000.0;
	x2 = (double)(decode(i, 13, 24) - 2048) / 1000.0;

	return(solution - ((100.0 * pow(pow(x1, 2.0) - x2, 2.0)) + pow(1.0 - x1, 2.0)));
};

/* 5 variables, 10 bits/variable. */

double f3 (i)
int i;
{
	register int x;
	int sum;
	double temp, pow();

	solution = 55.0;

	sum = 0;
	for (x = 0; x <= 4; x++) {
	  temp = (double)(decode(i, (x * 10) + 1, (x * 10) + 10) - 512) / 
	         100.0;
	  if (temp > 0.0) { sum = sum + (int)temp;}
	  else { sum = sum + (int)temp - 1; }
	}

	return(25.0 - (double)sum);
};

/* 30 variables, 8 bits/variable. ssrand() needs to be defined to be
   a (0,1) gaussian random variable */

double f4 (i)
int i;
{
	register int x;
	double sum, pow(), ssrand();
	double temp, temp2, temp4;

	solution = 1248.2;

	sum = 0.0;
	for (x = 0; x <= 29; x++) {
	  temp = ((double)(decode(i, (x * 8) + 1, (x * 8) + 8) - 128) / 100.0);
	  temp2 = temp * temp;
	  temp4 = temp2 * temp2;
	  sum = sum + ((double)i * temp4) + ssrand();
	}

	return(1248.2 - sum);
};

/* 2 variables, 17 bits/variable. */

static double f5_a[2][5] = {
  {-32.0,-16.0,0.0,16.0,32.0},
  {-32.0,-16.0,0.0,16.0,32.0}
};

double f5_j (i, j)
int i, j;
{
	double save, temp, temp2, temp6, pow();

	temp = ((double)(decode(i, 1, 17) - 65536) / 1000.0) - f5_a[0][j % 5];
	temp2 = temp * temp;
	temp6 = temp2 * temp2 * temp2;
	save = temp6;

	/* The following error was pointed out to me by Andrew Czarn on
	   Dec 11, 2000. Apologies for the typo! */
      /*temp = ((double)(decode(i, 18, 34) - 65536) / 1000.0) - f5_a[1][j % 5];*/
	temp = ((double)(decode(i, 18, 34) - 65536) / 1000.0) - f5_a[1][j / 5];
	temp2 = temp * temp;
	temp6 = temp2 * temp2 * temp2;

	return(save + temp6 + (double)(j + 1));
}


double f5 (i)
int i;
{
	register int x;
	double sum, pow(), f5_j();

	solution = 500.0;

	sum = 0.0;
	for (x = 0; x <= 24; x++) {
	  sum = sum + (1.0 / f5_j(i, x));
	}

	return(500.0 - (1.0 / (sum + .002)));
};