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keepflying: »ØÌûÖö¥ 2012-04-13 20:37:08
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2Â¥: Originally posted by xiuyouxu at 2012-04-13 17:23:46:
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4.189007356*10^(-10)*T*(-3.971367012*10^12-7.19400*10^5*T^2-2.070145440*10^9*T-125.*T^3+125.*T^3*(exp(1/T))^(28776/5))/(exp(1/T))^(28776/5)

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CODE:
LoopConstant Q=[1000,5000,10000,50000];
Constant c1=3.741832E-16,c2=1.438786E-2, sigma=5.6688e-008,
         lambda1=2.5*1e-6;
Function Q=sigma*T^4-int(c1*x^(-5)/(exp(c2/(x*T))-1),x=lambda1,1E8);

Q        T
1000        -364.440988765583
5000        544.966388377671
10000        -648.077906496062
50000        969.102507615287
5Â¥2012-10-16 16:27:28
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