function  y=jieyasuo(x) 
%function y=lianghua(x)  
%要用         x=x/max(x);
z=sign(x);
x=abs(x);
for i=1:length(x);
    if((x(i)>=0)&(x(i)<1/4))
        y(i)=x(i)/16;
    else if (x(i)>=1/4&x(i)<3/8)
            y(i)=x(i)/8-1/64;
        else if (x(i)>=3/8&x(i)<4/8)
                y(i)=x(i)/4-1/16;
            else if (x(i)>=4/8&x(i)<5/8)
                    y(i)=x(i)/2-3/16;
                else if (x(i)>=5/8&x(i)<6/8)
                        y(i)=x(i)-4/8;
                    else if (x(i)>=6/8&x(i)<7/8)
                            y(i)=2*x(i)-5/4;
                        else if (x(i)>=7/8&x(i)<=1)
                                y(i)=4*x(i)-3;
                            end;
                        end;
                    end;
                end;
            end;
        end;
    end;
end;
y=z.*y'*y(1)*64;