人工魚群算法matlab實(shí)現(xiàn)[共4頁]

1、function lhl_AFclc;clear all; close all;format longVisual = 2.5; %人工魚的感知距離Step = 0.3; %人工魚的移動(dòng)最大步長N = 10; %人工魚的數(shù)量Try_number = 50;%迭代的最大次數(shù)delta=0.618; %擁擠度因子a1 = -10; b1 = 10; a2 = -10; b2 = 10; d = ;%存儲(chǔ)50個(gè)狀態(tài)下的目標(biāo)函數(shù)值;k = 0; m = 50;%迭代次數(shù)X1 = rand(N,1)*(b1-a1)+a1; %在-1010之間,隨機(jī)生成50個(gè)數(shù)；X2 = rand(N,1)*(b2-a2

2、)+a2;X = X1 X2; %X = ones(N,2);%for i = 1:N% X(i,1)=-10;% X(i,2)=10;%end% 人工魚數(shù)量,兩個(gè)狀態(tài)變量X1和X2；%計(jì)算50個(gè)初始狀態(tài)下的；for i = 1:N www = X(i,1),X(i,2); d(i) = maxf(www); end%通告牌用于記錄人工魚個(gè)體的歷史最好狀態(tài)w,i = max(d); % 求出初始狀態(tài)下的最大值w和最大值的位置i；maxX = X(i,1),X(i,2); % 初始通告板記錄,最大值位置；maxY = w; % 初始化通告板記錄,最大值；figurex = ; figurey =

3、 ; figurez = ;figurex(numel(figurex)+1) = maxX(1); % 將maxX（1）放入figurex中,figurey(numel(figurey)+1) = maxX(2); % numel返回?cái)?shù)組或者向量中所含元素的總數(shù),matlab數(shù)組下標(biāo)默認(rèn)是從1開始的figurez(numel(figurez)+1) = maxY;while(km) for i = 1:N XX = X(i,1),X(i,2); %拿出其中一條魚來看他的四種行為判斷 %第一種行為：聚群行為：伙伴多且不擠,就向伙伴中心位置移動(dòng)%群聚行為是伙伴的中心點(diǎn),凸規(guī)劃下,中心點(diǎn)一定還在約

4、束內(nèi)%群聚行為不是一種maxf（Xc）的比較,就是看伙伴位置 nf1=0; Xc=0; label_swarm =0; %群聚行為發(fā)生標(biāo)志 for j = 1:N XX_1 = X(j,1), X(j,2); if (norm(XX_1-XX) delta*maxf(XX) & (norm(Xc-XX)=0) XXR1=rand*Step*(Xc-XX)/norm(Xc-XX); XXnext1=XX+XXR1; if(XXnext1(1) b1) XXnext1(1) = b1; end if(XXnext1(1) b2) XXnext1(2) = b2; end if(XXnext1(2)

5、 a2) XXnext1(2) = a2; end label_swarm =1; temp_y_XXnext1=maxf(XXnext1); else label_swarm =0; temp_y_XXnext1=-inf; end %第二種行為：追尾行為 ：周圍伙伴有最大值且附近不擠,向其伙伴方向移動(dòng)%追尾行為追尋伙伴行為,還是在約束內(nèi) temp_maxY = -inf; %按照理論來說這塊應(yīng)該初始化為-無窮小, label_follow =0;%追尾行為發(fā)生標(biāo)記 for j = 1:N XX_2 = X(j,1),X(j,2); if(norm(XX_2-XX)temp_maxY) te

6、mp_maxX = XX_2; temp_maxY = maxf(XX_2); end end nf2=0; for j = 1:N XX_2 = X(j,1),X(j,2); if(norm(XX_2-temp_maxX)delta*maxf(XX) & (norm(temp_maxX-XX)=0) %附近有Yj最大的伙伴,并且不太擁擠 XXR2=rand*Step*(temp_maxX-XX)/norm(temp_maxX-XX);%rand不是隨機(jī)反向,是隨機(jī)步長 XXnext2 = XX+XXR2; if(XXnext2(1) b1) XXnext2(1) = b1; end if(X

7、Xnext2(1) b2) XXnext2(2) = b2; end if(XXnext2(2) b1) % 下面這四個(gè)是一套,如果超出約束條件,就選值為邊界條件 XX_3(1) = b1; end if(XX_3(1) b2) XX_3(2) = b2; end if(XX_3(2) a2) XX_3(2) = a2; end if(maxf(XX) b1) % 下面這四個(gè)是一套,如果超出約束條件,就選值為邊界條件 XXnext3(1) = b1; end if(XXnext3(1) b2) XXnext3(2) = b2; end if(XXnext3(2) b1) % 下面這四個(gè)是一套,

8、如果超出約束條件,就選值為邊界條件 XX(1) = b1; end if(XX(1) b2) XX(2) = b2; end if(XX(2) temp_y_XXnext2) if(temp_y_XXnext1 temp_y_XXnext3) temp_XX = XXnext1; else temp_XX = XXnext3; end else if(temp_y_XXnext2 temp_y_XXnext3) temp_XX = XXnext2; else temp_XX = XXnext3; end end end XX=temp_XX; X(i,1) = XX(1); X(i,2) =

9、XX(2); % end %至此,所有人工魚,完成一次行為判斷和移動(dòng) %這塊是更新通告牌信息 for i = 1:N XXX = X(i,1),X(i,2); if (maxf(XXX)maxY) maxY = maxf(XXX); maxX = XXX; figurex(numel(figurex)+1) = maxX(1); figurey(numel(figurey)+1) = maxX(2); figurez(numel(figurez)+1) = maxY; end end x=X(:,1); y=X(:,2); plot(x,y,*r); axis(-10 10 -10 10); k = k+1endmaxXmaxYplot3(figurex,