自适应遗传算法代码.docx

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自适应遗传算法代码.docx

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自适应遗传算法代码.docx

自适应遗传算法代码

/**********************************************************************/

/*基于基本遗传算法的自适应遗传优化算法函数最优化SGA_AUTO.C*/

/*AFunctionOptimizerusingSimpleGeneticAlgorithm*/

/*developedfromthePascalSGAcodepresentedbyDavidE.Goldberg*/

/*华南理工大学电子与信息学院苏勇2004年4月*/

/**********************************************************************/

#include

#include

/*全局变量*/

structindividual/*个体*/

{

unsigned*chrom;/*染色体*/

doublefitness;/*个体适应度*/

doublevarible;/*个体对应的变量值*/

intxsite;/*交叉位置*/

intparent[2];/*父个体*/

int*utility;/*特定数据指针变量*/

};

structbestever/*最佳个体*/

{

unsigned*chrom;/*最佳个体染色体*/

doublefitness;/*最佳个体适应度*/

doublevarible;/*最佳个体对应的变量值*/

intgeneration;/*最佳个体生成代*/

};

structindividual*oldpop;/*当前代种群*/

structindividual*newpop;/*新一代种群*/

structbesteverbestfit;/*最佳个体*/

doublesumfitness;/*种群中个体适应度累计*/

doublemax;/*种群中个体最大适应度*/

doubleavg;/*种群中个体平均适应度*/

doublemin;/*种群中个体最小适应度*/

floatpcross;/*交叉概率*/

floatpmutation;/*变异概率*/

intpopsize;/*种群大小*/

intlchrom;/*染色体长度*/

intchromsize;/*存储一染色体所需字节数*/

intgen;/*当前世代数*/

intmaxgen;/*最大世代数*/

intrun;/*当前运行次数*/

intmaxruns;/*总运行次数*/

intprintstrings;/*输出染色体编码的判断,0--不输出,1--输出*/

intnmutation;/*当前代变异发生次数*/

intncross;/*当前代交叉发生次数*/

floatpc1;

floatpc2;

floatpm1;

floatpm2;

inttemp_mate1;

inttemp_mate2;

/*随机数发生器使用的静态变量*/

staticdoubleoldrand[55];

staticintjrand;

staticdoublerndx2;

staticintrndcalcflag;

/*输出文件指针*/

FILE*outfp;

/*函数定义*/

voidadvance_random();

intflip(float);rnd(int,int);

voidrandomize();

doublerandomnormaldeviate();

floatrandomperc(),rndreal(float,float);

voidwarmup_random(float);

voidinitialize(),initdata(),initpop();

voidinitreport(),generation(),initmalloc();

voidfreeall(),nomemory(char*),report();

voidwritepop(),writechrom(unsigned*);

voidpreselect();

voidstatistics(structindividual*);

voidtitle(),repchar(FILE*,char*,int);

voidskip(FILE*,int);

intselect();

voidobjfunc(structindividual*);

intcrossover(unsigned*,unsigned*,unsigned*,unsigned*);

voidmutation(unsigned*);

voidinitialize()/*遗传算法初始化*/

{

/*键盘输入遗传算法参数*/

initdata();

/*确定染色体的字节长度*/

chromsize=(lchrom/(8*sizeof(unsigned)));

if(lchrom%(8*sizeof(unsigned)))chromsize++;

/*分配给全局数据结构空间*/

initmalloc();

/*初始化随机数发生器*/

randomize();

/*初始化全局计数变量和一些数值*/

nmutation=0;

ncross=0;

bestfit.fitness=0.0;

bestfit.generation=0;

/*初始化种群,并统计计算结果*/

initpop();

statistics(oldpop);

initreport();

}

voidinitdata()/*遗传算法参数输入*/

{

charanswer[2];

popsize=30;

if((popsize%2)!

=0)

{

fprintf(outfp,"种群大小已设置为偶数\n");

popsize++;

};

lchrom=22;

printstrings=1;

maxgen=150;

pcross=0.8;

pc1=0.8;

pc2=0.6;

pmutation=0.05;

pm1=0.05;

pm2=0.005;

}

voidinitpop()/*随机初始化种群*/

{

intj,j1,k,stop;

unsignedmask=1;

for(j=0;j

{

for(k=0;k

{

oldpop[j].chrom[k]=0;

if(k==(chromsize-1))

stop=lchrom-(k*(8*sizeof(unsigned)));

else

stop=8*sizeof(unsigned);

for(j1=1;j1<=stop;j1++)

{

oldpop[j].chrom[k]=oldpop[j].chrom[k]<<1;

if(flip(0.5))

oldpop[j].chrom[k]=oldpop[j].chrom[k]|mask;

}

}

oldpop[j].parent[0]=0;/*初始父个体信息*/

oldpop[j].parent[1]=0;

oldpop[j].xsite=0;

objfunc(&(oldpop[j]));/*计算初始适应度*/

}

}

voidinitreport()/*初始参数输出*/

{

voidskip();

skip(outfp,1);

fprintf(outfp,"基本遗传算法参数\n");

fprintf(outfp,"-------------------------------------------------\n");

fprintf(outfp,"种群大小(popsize)=%d\n",popsize);

fprintf(outfp,"染色体长度(lchrom)=%d\n",lchrom);

fprintf(outfp,"最大进化代数(maxgen)=%d\n",maxgen);

fprintf(outfp,"交叉概率(pcross)=%f\n",pcross);

fprintf(outfp,"变异概率(pmutation)=%f\n",pmutation);

fprintf(outfp,"-------------------------------------------------\n");

skip(outfp,1);

fflush(outfp);

}

voidgeneration()

{

intmate1,mate2,jcross,j=0;

/*每代运算前进行预选*/

preselect();

/*选择,交叉,变异*/

do

{

/*挑选交叉配对*/

mate1=select();

temp_mate1=mate1;

mate2=select();

temp_mate2=mate2;

/*交叉和变异*/

jcross=crossover(oldpop[mate1].chrom,oldpop[mate2].chrom,newpop[j].chrom,newpop[j+1].chrom);

/*自适应变异概率*/

if(gen!

=0)

{

if(newpop[j].fitness>=avg)

pmutation=pm1-(pm1-pm2)*(max-newpop[j].fitness)/(max-avg);

else

pmutation=pm1;

}

mutation(newpop[j].chrom);

if(gen!

=0)

{

if(newpop[j+1].fitness>=avg)

pmutation=pm1-(pm1-pm2)*(max-newpop[j+1].fitness)/(max-avg);

else

pmutation=pm1;

}

mutation(newpop[j+1].chrom);

/*解码,计算适应度*/

objfunc(&(newpop[j]));

/*记录亲子关系和交叉位置*/

newpop[j].parent[0]=mate1+1;

newpop[j].xsite=jcross;

newpop[j].parent[1]=mate2+1;

objfunc(&(newpop[j+1]));

newpop[j+1].parent[0]=mate1+1;

newpop[j+1].xsite=jcross;

newpop[j+1].parent[1]=mate2+1;

j=j+2;

}

while(j<(popsize-1));

}

voidinitmalloc()/*为全局数据变量分配空间*/

{

unsignednbytes;

char*malloc();

intj;

/*分配给当前代和新一代种群内存空间*/

nbytes=popsize*sizeof(structindividual);

if((oldpop=(structindividual*)malloc(nbytes))==NULL)

nomemory("oldpop");

if((newpop=(structindividual*)malloc(nbytes))==NULL)

nomemory("newpop");

/*分配给染色体内存空间*/

nbytes=chromsize*sizeof(unsigned);

for(j=0;j

{

if((oldpop[j].chrom=(unsigned*)malloc(nbytes))==NULL)

nomemory("oldpopchromosomes");

if((newpop[j].chrom=(unsigned*)malloc(nbytes))==NULL)

nomemory("newpopchromosomes");

}

if((bestfit.chrom=(unsigned*)malloc(nbytes))==NULL)

nomemory("bestfitchromosome");

}

voidfreeall()/*释放内存空间*/

{

inti;

for(i=0;i

{

free(oldpop[i].chrom);

free(newpop[i].chrom);

}

free(oldpop);

free(newpop);

free(bestfit.chrom);

}

voidnomemory(string)/*内存不足,退出*/

char*string;

{

fprintf(outfp,"malloc:

outofmemorymaking%s!

!

\n",string);

exit(-1);

}

voidreport()/*输出种群统计结果*/

{

voidrepchar(),skip();

voidwritepop(),writestats();

repchar(outfp,"-",80);

skip(outfp,1);

if(printstrings==1)

{

repchar(outfp,"",((80-17)/2));

fprintf(outfp,"模拟计算统计报告\n");

fprintf(outfp,"世代数%3d",gen);

repchar(outfp,"",(80-28));

fprintf(outfp,"世代数%3d\n",(gen+1));

fprintf(outfp,"个体染色体编码");

repchar(outfp,"",lchrom-5);

fprintf(outfp,"适应度父个体交叉位置");

fprintf(outfp,"染色体编码");

repchar(outfp,"",lchrom-5);

fprintf(outfp,"适应度\n");

repchar(outfp,"-",80);

skip(outfp,1);

writepop(outfp);

repchar(outfp,"-",80);

skip(outfp,1);

}

fprintf(outfp,"第%d代统计:

\n",gen);

fprintf(outfp,"总交叉操作次数=%d,总变异操作数=%d\n",ncross,nmutation);

fprintf(outfp,"最小适应度:

%f最大适应度:

%f平均适应度%f\n",min,max,avg);

fprintf(outfp,"迄今发现最佳个体=>所在代数:

%d",bestfit.generation);

fprintf(outfp,"适应度:

%f染色体:

",bestfit.fitness);

writechrom((&bestfit)->chrom);

fprintf(outfp,"对应的变量值:

%f",bestfit.varible);

skip(outfp,1);

repchar(outfp,"-",80);

skip(outfp,1);

}

voidwritepop()

{

structindividual*pind;

intj;

for(j=0;j

{

fprintf(outfp,"%3d)",j+1);

/*当前代个体*/

pind=&(oldpop[j]);

writechrom(pind->chrom);

fprintf(outfp,"%8f|",pind->fitness);

/*新一代个体*/

pind=&(newpop[j]);

fprintf(outfp,"(%2d,%2d)%2d",

pind->parent[0],pind->parent[1],pind->xsite);

writechrom(pind->chrom);

fprintf(outfp,"%8f\n",pind->fitness);

}

}

voidwritechrom(chrom)/*输出染色体编码*/

unsigned*chrom;

{

intj,k,stop;

unsignedmask=1,tmp;

for(k=0;k

{

tmp=chrom[k];

if(k==(chromsize-1))

stop=lchrom-(k*(8*sizeof(unsigned)));

else

stop=8*sizeof(unsigned);

for(j=0;j

{

if(tmp&mask)

fprintf(outfp,"1");

else

fprintf(outfp,"0");

tmp=tmp>>1;

}

}

}

voidpreselect()

{

intj;

sumfitness=0;

for(j=0;j

}

intselect()/*轮盘赌选择*/

{

externfloatrandomperc();

floatsum,pick;

inti;

pick=randomperc();

sum=0;

if(sumfitness!

=0)

{

for(i=0;(sum

sum+=oldpop[i].fitness/sumfitness;

}

else

i=rnd(1,popsize);

return(i-1);

}

voidstatistics(pop)/*计算种群统计数据*/

structindividual*pop;

{

inti,j;

sumfitness=0.0;

min=pop[0].fitness;

max=pop[0].fitness;

/*计算最大、最小和累计适应度*/

for(j=0;j

{

sumfitness=sumfitness+pop[j].fitness;

if(pop[j].fitness>max)max=pop[j].fitness;

if(pop[j].fitness

/*newglobalbest-fitindividual*/

if(pop[j].fitness>bestfit.fitness)

{

for(i=0;i

bestfit.chrom[i]=pop[j].chrom[i];

bestfit.fitness=pop[j].fitness;

bestfit.varible=pop[j].varible;

bestfit.generation=gen;

}

}

/*计算平均适应度*/

avg=sumfitness/popsize;

}

voidtitle()

{

printf("SGAOptimizerJean.Timex\n");

}

voidrepchar(outfp,ch,repcount)

FILE*outfp;

char*ch;

intrepcount;

{

intj;

for(j=1;j<=repcount;j++)fprintf(outfp,"%s",ch);

}

voidskip(outfp,skipcount)

FILE*outfp;

intskipcount;

{

intj;

for(j=1;j<=skipcount;j++)fprintf(outfp,"\n");

}

voidobjfunc(critter)/*计算适应度函数值*/

structindividual*critter;

{

unsignedmask=1;

unsignedbitpos;

unsignedtp;

doublepow(),bitpow;

intj,k,stop;

critter->varible=0.0;

for(k=0;k

{

if(k==(chromsize-1))

stop=lchrom-(k*(8*sizeof(unsigned)));

else

stop=8*sizeof(unsigned);

tp=critter->chrom[k];

for(j=0;j

{

bitpos=j+(8*sizeof(unsigned))*k;

if((tp&mask)==1)

{

bitpow=pow(2.0,(double)bitpos);

critter->varible=critter->varible+bitpow;

}

tp=tp>>1;

}

}

critter->varible=-1+critter->varible*3/(pow(2.0,(double)lchrom)-1);

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