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fhn2006

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Clear["`*"]
alpha = 2.5;
beta = 2;
gama = 1;
klu := Sqrt[5];
kld := Sqrt[0.45];

Tuu :=
  2 - Cos[alpha*gama*n/(beta*klu*Cos[x])] -
   Cos[alpha*gama*n/((4*klu^2*Sin[x]^2 + B)*klu*Cos[x])] -
   alpha*n/(2*beta*klu^2*Cos[x]^2)*(1 -
      Cos[alpha*gama*n/(beta*klu*Cos[x])]) -
   alpha*n/(2*(4*klu^2*Sin[x]^2 + beta)*klu^2*Cos[x]^2)*(1 -
      Cos[alpha*gama*n/((4*klu^2*Sin[x]^2 + beta)*klu*Cos[x])]);
Tdd :=
  2 - Cos[alpha*gama*n/(beta*kld*Cos[x])] -
   Cos[alpha*gama*n/((4*kld^2*Sin[x]^2 + beta)*kld*Cos[x])] -
   alpha*n/(2*beta*kld^2*Cos[x]^2)*(1 -
      Cos[alpha*gama*n/(beta*kld*Cos[x])]) -
   alpha*n/(2*(4*kld^2*Sin[x]^2 + beta)*kld^2*Cos[x]^2)*(1 -
      Cos[alpha*gama*n/((4*kld^2*Sin[x]^2 + beta)*kld*Cos[x])]);
Tud :=
  kld/klu*(2 - Cos[alpha*gama*n/(beta*kld*Cos[x])] -
      Cos[alpha*gama*n/((4*kld^2*Sin[x]^2 + beta)*kld*Cos[x])]) -
   alpha*n/(2*beta*klu*kld*Cos[x]^2)*(1 -
      Cos[alpha*gama*n/(beta*kld*Cos[x])]) -
   alpha*n/(2*(4*klu*kld*Sin[x]^2 + beta)*kld^2*Cos[x]^2)*(1 -
      Cos[alpha*gama*n/((4*kld^2*Sin[x]^2 + beta)*kld*Cos[x])]);
Tdu :=
  klu/kld*(2 - Cos[alpha*gama*n/(beta*klu*Cos[x])] -
      Cos[alpha*gama*n/((4*klu^2*Sin[x]^2 + beta)*klu*Cos[x])]) -
   alpha*n/(2*beta*klu*kld*Cos[x]^2)*(1 -
      Cos[alpha*gama*n/(beta*klu*Cos[x])]) -
   alpha*n/(2*(4*klu*kld*Sin[x]^2 + beta)*klu^2*Cos[x]^2)*(1 -
      Cos[alpha*gama*n/((4*klu^2*Sin[x]^2 + beta)*klu*Cos[x])]);

juu := NIntegrate[Tuu, {x, -1, 1}]
jdd := NIntegrate[Tdd, {x, -1, 1}]
jud := NIntegrate[Tud, {x, -1, 1}]
jdu := NIntegrate[Tdu, {x, -1, 1}]

tmr := {n, (1 - (jud + jdu)/(juu + jdd))*100}

Export["D://tunnling.txt", Table[tmr, {n, 1, 8, 1}], "Table"];  £¨¸ÃÓï¾äºÍÇ°Ãæ²»ÊÇÒ»¸öÄ£¿é£©

NIntegrate::inumr: The integrand 2-Cos[0.559017 Sec[x]]-Cos[(1.11803 Sec[x])/(B+20 Power[<<2>>])]-0.125 (1-Cos[0.559017 Sec[x]]) Sec[x]^2-(0.25 (1-Cos[(1.11803 Sec[x])/Plus[<<2>>]]) Sec[x]^2)/(2+20 Sin[x]^2) has evaluated to non-numerical values for all sampling points in the region with boundaries {{0,1}}.
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