多目标遗传算法 ------ NSGA-II （部分源码解析）父、子种群合并 merge.c

 /* Routine for mergeing two populations */

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

 # include "global.h"
 # include "rand.h"

 /* Routine to merge two populations into one */
 void merge(population *pop1, population *pop2, population *pop3)
 {
     int i, k;
     for (i=; i<popsize; i++)
     {
         copy_ind (&(pop1->ind[i]), &(pop3->ind[i]));
     }
     for (i=, k=popsize; i<popsize; i++, k++)
     {
         copy_ind (&(pop2->ind[i]), &(pop3->ind[k]));
     }
     return;
 }

 /* Routine to copy an individual 'ind1' into another individual 'ind2' */
 void copy_ind (individual *ind1, individual *ind2)
 {
     int i, j;
     ind2->rank = ind1->rank;
     ind2->constr_violation = ind1->constr_violation;
     ind2->crowd_dist = ind1->crowd_dist;
     if (nreal!=)
     {
         for (i=; i<nreal; i++)
         {
             ind2->xreal[i] = ind1->xreal[i];
         }
     }
     if (nbin!=)
     {
         for (i=; i<nbin; i++)
         {
             ind2->xbin[i] = ind1->xbin[i];
             for (j=; j<nbits[i]; j++)
             {
                 ind2->gene[i][j] = ind1->gene[i][j];
             }
         }
     }
     for (i=; i<nobj; i++)
     {
         ind2->obj[i] = ind1->obj[i];
     }
     if (ncon!=)
     {
         for (i=; i<ncon; i++)
         {
             ind2->constr[i] = ind1->constr[i];
         }
     }
     return;
 }

copy_ind  具体进行两个个体 内容拷贝的函数。

29     ind2->rank = ind1->rank;
30     ind2->constr_violation = ind1->constr_violation;
31     ind2->crowd_dist = ind1->crowd_dist;

复制个体的  支配层  排序值。

复制个体的  限制条件  的超出值， 大于等于0未超出， 小于0为超出限制。

复制个体的  拥挤距离 。

判断个体的编码， 把个体的具体编码值 复制。

复制个体的  各个  目标函数的数值。

复制个体的  各个限制条件的  数值， 所有限制条件的数值之和等于 constr_violation 。