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clc;clear
n=0.75;
[beta,x]=meshgrid(0:0.01:1);
y1=n*(1/4+1./(8*beta*x)).*(1/2*beta*x+1/4)-(1-n)*(1+x)/2;
mesh(x,beta,y1);
xlabel('x'),ylabel('beta'),zlabel('y1')

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clc;clear
n=0.75;
X=linspace(0,1,1000);
Beta=linspace(0,1,1000);
y1=n*(1/4+1./(8*Beta.*X)).*(1/2*Beta.*X+1/4)-(1-n)*(1+X)/2;
yy=Beta.*X;
j=1;

for j=1:1000
        if (yy(j)<=5/6) && (yy(j)>=1/2)
           scatter3(X,Beta,y1);
        else
    end
end
xlabel('x'),ylabel('beta'),zlabel('y1')
axis([0 1 0 1 0 100]);
4Â¥2014-10-10 16:36:04
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2Â¥2014-10-03 10:01:15
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