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falphaΪ¹ØÓÚalphaµÄº¯Êý
falpha=-3.51+18.721*alpha-55.918*alpha^2+120.9*alpha^3-162.54*alpha^4+131.51*alpha^5-62.572*alpha^6+16.1*alpha^7-1.7264*alpha^8

L=(2*k/epsi)^1.5/epsi

alphax=2.5*log(L*epsi^0.4*1000^0.6/0.23/0.025^0.6)/log(L/d)-1.5

integral=(d/L)^((alpha+2-3*falpha)/3)

int(integral,alpha,0.12,alphax)

d=0.0001:0.0001:0.0005
k=0.5
epsi=5


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integral=(d/L)^((alpha+2-3*falpha)/3)

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