mutation.c

来自「多目标算法的DSP实现。可以直接在DSP平台上进行多目标优化」· C语言 代码 · 共 57 行

# include <stdio.h>
# include <math.h>

# include "malloc.h"
# include "global.h"

// # include "rand.c"

// 群体变异
void mutation_pop (population *pop)
{
    int i;
    for (i=0; i<POPSIZE; i++)
    {
        mutation_ind(&(pop->ind[i]));
    }
    return;
}

// 个体变异
void mutation_ind (individual *ind)
{
    mutate_ind_real(ind);
    return;
}

// 变异
void mutate_ind_real (individual *ind)
{
	int i;
	double delta, r;
	if (randomperc() <= PM)
	{
		for (i=0; i<NX; i++)
		{
			r = randomperc();
			if (r < 0.5)
			{
				delta = pow(2*r, 1.0/(MUM + 1)) - 1;
			}
			else
			{
				delta = 1 - pow(2*(1 - r), 1.0/(MUM + 1));
			}
			ind->x[i] = ind->x[i] + (MAX - MIN)*delta;
			if (ind->x[i] < MIN)
			{
				ind->x[i] = MIN;
			}
			else if (ind->x[i] > MAX)
			{
				ind->x[i] = MAX;
			}
		}
	}
	return;
}