function [y]=b2d(x)
% variable 'x' stands for the decimal value of popular
[popsize,lchrom]=size(x);
y=zeros(popsize,1);
p=1;
for n=1:lchrom
    for m=1:popsize
        if x(m,n)==1
            y(m,1)=y(m,1)+p;
        end
    end
    p=2*p;
end