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本帖最后由 uperrua 于 2021-3-10 17:39 编辑 0 E$ h" ^1 N9 B6 C/ g
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一、简介
8 q* R% u9 r- v4 d灰狼优化算法是最近提出的一种较有竞争力的优化技术.然而,它的位置更新方程存在开发能力强而探索能力弱的缺点.受差分进化和粒子群优化算法的启发,构建一个修改的个体位置更新方程以增强算法的探索能力;受粒子群优化算法的启发,提出一种控制参数a随机动态调整策略.此外,为了提高算法的全局收敛速度,用混沌初始化方法产生初始种群.采用18个高维测试函数进行仿真实验,结果表明:对于绝大多数情形,在相同最大适应度函数评价次数下,本文算法的性能明显优于标准灰狼优化算法.5 T& E" y1 [) I! F
. d: C. V* X0 n; @# L5 k二、源代码! k; i3 r4 s. N6 h9 j: g$ Z
# u' C& C U$ J% G8 c- %%
- clear all
- clc
- close all
- SearchAgents_no=30; % Number of search agents
- Function_name='F18'; % Name of the test function that can be from F1 to F23 (Table 1,2,3 in the paper)
- Max_iteration=500; % Maximum numbef of iterations
- % Load details of the selected benchmark function
- [lb,ub,dim,fobj]=Get_Functions_details(Function_name);
- [Best_score,Best_pos,PSOGWO_cg_curve]=PSOGWO(SearchAgents_no,Max_iteration,lb,ub,dim,fobj);
- [Alpha_score,Alpha_pos,GWO_cg_curve]=GWO(SearchAgents_no,Max_iteration,lb,ub,dim,fobj);
- figure('Position',[500 500 660 290])
- %Draw search space
- subplot(1,2,1);
- func_plot(Function_name);
- title('Parameter space')
- xlabel('x_1');
- ylabel('x_2');
- zlabel([Function_name,'( x_1 , x_2 )'])
- %Draw objective space
- subplot(1,2,2);
- semilogy(PSOGWO_cg_curve,'Color','r')
- hold on
- semilogy(GWO_cg_curve,'Color','b')
- title('Objective space')
- xlabel('Iteration');
- ylabel('Best score obtained so far');
- axis tight
- grid on
- box on
- legend('PSOGWO','GWO')
- display(['The best solution obtained by PSOGWO is : ', num2str(Best_pos)]);
- display(['The best optimal value of the objective funciton found by PSOGWO is : ', num2str(Best_score)]);
- display(['The best solution obtained by GWO is : ', num2str(Alpha_pos)]);
- display(['The best optimal value of the objective funciton found by GWO is : ', num2str(Alpha_score)]);
- % This function containts full information and implementations of the benchmark
- % functions in Table 1, Table 2, and Table 3 in the paper
- % lb is the lower bound: lb=[lb_1,lb_2,...,lb_d]
- % up is the uppper bound: ub=[ub_1,ub_2,...,ub_d]
- % dim is the number of variables (dimension of the problem)
- function [lb,ub,dim,fobj] = Get_Functions_details(F)
- switch F
- case 'F1'
- fobj = @F1;
- lb=-100;
- ub=100;
- dim=30;
- case 'F2'
- fobj = @F2;
- lb=-10;
- ub=10;
- dim=30;
- case 'F3'
- fobj = @F3;
- lb=-100;
- ub=100;
- dim=30;
- case 'F4'
- fobj = @F4;
- lb=-100;
- ub=100;
- dim=30;
- case 'F5'
- fobj = @F5;
- lb=-30;
- ub=30;
- dim=30;
- case 'F6'
- fobj = @F6;
- lb=-100;
- ub=100;
- dim=30;
- case 'F7'
- fobj = @F7;
- lb=-1.28;
- ub=1.28;
- dim=30;
- case 'F8'
- fobj = @F8;
- lb=-500;
- ub=500;
- dim=30;
- case 'F9'
- fobj = @F9;
- lb=-5.12;
- ub=5.12;
- dim=30;
- case 'F10'
- fobj = @F10;
- lb=-32;
- ub=32;
- dim=30;
- case 'F11'
- fobj = @F11;
- lb=-600;
- ub=600;
- dim=30;
- case 'F12'
- fobj = @F12;
- lb=-50;
- ub=50;
- dim=30;
- case 'F13'
- fobj = @F13;
- lb=-50;
- ub=50;
- dim=30;
- case 'F14'
- fobj = @F14;
- lb=-65.536;
- ub=65.536;
- dim=2;
- case 'F15'
- fobj = @F15;
- lb=-5;
- ub=5;
- dim=4;
- case 'F16'
- fobj = @F16;
- lb=-5;
- ub=5;
- dim=2;
- case 'F17'
- fobj = @F17;
- lb=[-5,0];
- ub=[10,15];
- dim=2;
- case 'F18'
- fobj = @F18;
- lb=-2;
- ub=2;
- dim=2;
- case 'F19'
- fobj = @F19;
- lb=0;
- ub=1;
- dim=3;
- case 'F20'
- fobj = @F20;
- lb=0;
- ub=1;
- dim=6;
- case 'F21'
- fobj = @F21;
- lb=0;
- ub=10;
- dim=4;
- case 'F22'
- fobj = @F22;
- lb=0;
- ub=10;
- dim=4;
- case 'F23'
- fobj = @F23;
- lb=0;
- ub=10;
- dim=4;
- end
- end
- % F1
- function o = F1(x)
- o=sum(x.^2);
- end
- % F2
- function o = F2(x)
- o=sum(abs(x))+prod(abs(x));
- end
- % F3
- function o = F3(x)
- dim=size(x,2);
- o=0;
- for i=1:dim
- o=o+sum(x(1:i))^2;
- end
- end
- % F4
- function o = F4(x)
- o=max(abs(x));
- end
- % F5
- function o = F5(x)
- dim=size(x,2);
- o=sum(100*(x(2:dim)-(x(1:dim-1).^2)).^2+(x(1:dim-1)-1).^2);
- end
- % F6
- function o = F6(x)
- o=sum(abs((x+.5)).^2);
- end
- % F7
- function o = F7(x)
- dim=size(x,2);
- o=sum([1:dim].*(x.^4))+rand;
- end
- % F8
- function o = F8(x)
- o=sum(-x.*sin(sqrt(abs(x))));
- end
- % F9
- function o = F9(x)
- dim=size(x,2);
- o=sum(x.^2-10*cos(2*pi.*x))+10*dim;
- end
- % F10
- function o = F10(x)
- dim=size(x,2);
- o=-20*exp(-.2*sqrt(sum(x.^2)/dim))-exp(sum(cos(2*pi.*x))/dim)+20+exp(1);
- end
- % F11
- function o = F11(x)
- dim=size(x,2);
- o=sum(x.^2)/4000-prod(cos(x./sqrt([1:dim])))+1;
- end
- % F12
- function o = F12(x)
- dim=size(x,2);
- o=(pi/dim)*(10*((sin(pi*(1+(x(1)+1)/4)))^2)+sum((((x(1:dim-1)+1)./4).^2).*...
- (1+10.*((sin(pi.*(1+(x(2:dim)+1)./4)))).^2))+((x(dim)+1)/4)^2)+sum(Ufun(x,10,100,4));
- end
- % F13
- function o = F13(x)
- dim=size(x,2);
- o=.1*((sin(3*pi*x(1)))^2+sum((x(1:dim-1)-1).^2.*(1+(sin(3.*pi.*x(2:dim))).^2))+...
- ((x(dim)-1)^2)*(1+(sin(2*pi*x(dim)))^2))+sum(Ufun(x,5,100,4));
- end
- % F14
- function o = F14(x)
- aS=[-32 -16 0 16 32 -32 -16 0 16 32 -32 -16 0 16 32 -32 -16 0 16 32 -32 -16 0 16 32;,...
- -32 -32 -32 -32 -32 -16 -16 -16 -16 -16 0 0 0 0 0 16 16 16 16 16 32 32 32 32 32];
- for j=1:25
- bS(j)=sum((x'-aS(:,j)).^6);
- end
- o=(1/500+sum(1./([1:25]+bS))).^(-1);
- end
- % F15
- function o = F15(x)
- aK=[.1957 .1947 .1735 .16 .0844 .0627 .0456 .0342 .0323 .0235 .0246];
- bK=[.25 .5 1 2 4 6 8 10 12 14 16];bK=1./bK;
- o=sum((aK-((x(1).*(bK.^2+x(2).*bK))./(bK.^2+x(3).*bK+x(4)))).^2);
- end
- % F16
- function o = F16(x)
- o=4*(x(1)^2)-2.1*(x(1)^4)+(x(1)^6)/3+x(1)*x(2)-4*(x(2)^2)+4*(x(2)^4);
- end
- % F17
- function o = F17(x)
- o=(x(2)-(x(1)^2)*5.1/(4*(pi^2))+5/pi*x(1)-6)^2+10*(1-1/(8*pi))*cos(x(1))+10;
- end
- % F18
- function o = F18(x)
- o=(1+(x(1)+x(2)+1)^2*(19-14*x(1)+3*(x(1)^2)-14*x(2)+6*x(1)*x(2)+3*x(2)^2))*...
- (30+(2*x(1)-3*x(2))^2*(18-32*x(1)+12*(x(1)^2)+48*x(2)-36*x(1)*x(2)+27*(x(2)^2)));
- end
- % F19
- function o = F19(x)
- aH=[3 10 30;.1 10 35;3 10 30;.1 10 35];cH=[1 1.2 3 3.2];
- pH=[.3689 .117 .2673;.4699 .4387 .747;.1091 .8732 .5547;.03815 .5743 .8828];
- o=0;
- for i=1:4
- o=o-cH(i)*exp(-(sum(aH(i,:).*((x-pH(i,:)).^2))));
- end
- end
- % F20
- function o = F20(x)
- aH=[10 3 17 3.5 1.7 8;.05 10 17 .1 8 14;3 3.5 1.7 10 17 8;17 8 .05 10 .1 14];
- cH=[1 1.2 3 3.2];
- pH=[.1312 .1696 .5569 .0124 .8283 .5886;.2329 .4135 .8307 .3736 .1004 .9991;...
- .2348 .1415 .3522 .2883 .3047 .6650;.4047 .8828 .8732 .5743 .1091 .0381];
- o=0;
- for i=1:4
- o=o-cH(i)*exp(-(sum(aH(i,:).*((x-pH(i,:)).^2))));
- end
- end
- % F21
- function o = F21(x)
- aSH=[4 4 4 4;1 1 1 1;8 8 8 8;6 6 6 6;3 7 3 7;2 9 2 9;5 5 3 3;8 1 8 1;6 2 6 2;7 3.6 7 3.6];
- cSH=[.1 .2 .2 .4 .4 .6 .3 .7 .5 .5];
- o=0;
- for i=1:5
- o=o-((x-aSH(i,:))*(x-aSH(i,:))'+cSH(i))^(-1);
- end
- end
- % F22
- function o = F22(x)
- aSH=[4 4 4 4;1 1 1 1;8 8 8 8;6 6 6 6;3 7 3 7;2 9 2 9;5 5 3 3;8 1 8 1;6 2 6 2;7 3.6 7 3.6];
- cSH=[.1 .2 .2 .4 .4 .6 .3 .7 .5 .5];
- o=0;
- for i=1:7
- o=o-((x-aSH(i,:))*(x-aSH(i,:))'+cSH(i))^(-1);
- end
- end
- % F23
- function o = F23(x)
- aSH=[4 4 4 4;1 1 1 1;8 8 8 8;6 6 6 6;3 7 3 7;2 9 2 9;5 5 3 3;8 1 8 1;6 2 6 2;7 3.6 7 3.6];
- cSH=[.1 .2 .2 .4 .4 .6 .3 .7 .5 .5];
- o=0;
- for i=1:10
- o=o-((x-aSH(i,:))*(x-aSH(i,:))'+cSH(i))^(-1);
- end
- end
- function o=Ufun(x,a,k,m)
- o=k.*((x-a).^m).*(x>a)+k.*((-x-a).^m).*(x<(-a));
- end
- 7 @. N1 U, x( b) s# F
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- k" R5 I8 `- ?' z1 ]1 C三、运行结果
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