www.pudn.com > my_liziqun_RBF.rar > fitness.m, change:2009-05-01,size:1212b


%计算个体误差和函数 
function [p,BsJ] = fitness(p,BsJ) 
ts = 0.001; 
 
alfa = 0.05; 
xite = 0.85; 
x = [0,0]'; 
b = [p(1);p(2);p(3)]; 
c = [p(4) p(5) p(6); 
     p(7) p(8) p(9)]; 
w = [p(10);p(11);p(12)]; 
 
w_1 = w;w_2 = w_1; 
c_1 = c;c_2 = c_1; 
b_1 = b;b_2 = b_1; 
y_1 = 0; 
 
for k = 1:1:400 
    timef(k) = k*ts; 
        
    u(k) = sin(5*2*pi*k*ts); 
     
    y(k) = u(k)^3 + y_1/(1 + y_1^2); 
     
    x(1) = u(k); 
    x(2) = y(k); 
    for j = 1:1:3 
        h(j) = exp(-norm(x - c(:,j))^2/(2*b(j)*b(j))); 
    end 
    ym(k) = w_1'*h'; 
     
    e(k) = y(k) - ym(k); 
     
    d_w = 0*w;d_b = 0*b;d_c = 0*c; 
    for j = 1:1:3 
        d_w(j) = xite*e(k)*h(j); 
        d_b(j) = xite*e(k)*w(j)*h(j)*(b(j)^-3)*norm(x-c(:,j))^2; 
        for i = 1:1:2 
            d_c(i,j) = xite*e(k)*w(j)*h(j)*(x(i) - c(i,j))*(b(j)^-2); 
        end 
    end 
     
    w = w_1 + d_w + alfa*(w_1 - w_2); 
    b = b_1 + d_b + alfa*(b_1 - b_2); 
    c = c_1 + d_c + alfa*(c_1 - c_2); 
     
    y_1 = y(k); 
    w_2 = w_1; 
    w_1 = w; 
     
    c_2 = c_1; 
    c_1 = c; 
     
    b_2 = b_1; 
    b_1 = b; 
end 
 
B = 0; 
for i = 1:1:400 
    Ji(i) = abs(e(i)); 
    B = B + 100*Ji(i); 
end 
BsJ = B;