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Freq=[10e6::1e6::75e6]
( j0 ^# R7 D" K8 {: p5 Nb1=2e-5
8 D. `; d" N- pb2=1.1e-10
q, T; L! Z" c/ db3=3.2e-20
* K# s: w+ {4 }. {( C7 M) \) d: Mb4=1.2e-40
0 `/ p. w- L: Ne=2.71828 3 e6 k# r0 C$ t4 }
ILpcb(f)=0.3*[20*lg(e)*(b1*(power(f,1/2)+b2*(power(f,1)+b3*(power(f,2)+b4*(power(f,3)] * E6 C; v( E- N; k% \
- |) F4 f. ]5 R: VA=12-2*POWER(f,1/2) + n7 M; d& F# p$ L9 X+ |
B=6.3-13*lg(f/5.5)
$ f6 w% P; z0 }RL=if(freq<4.1)then a else b
! s b1 z' P, J2 F$ c3 f) w
$ A: i" f" p e3 F+ a x2 q( Q5 f0 P% I3 @3 s
可以参照这个写 |
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