level 3
花落辞殇nice
楼主
想把表达式in[1]用k1 , k2 , k3, Q1,Q2,Q3表示，代码如下：(w^2 (w Subscript[M, 2] Subscript[M, 3] +
I Subscript[M, 1] Subscript[R, 3])^2 Subscript[R,
L])/((1 + I w Subscript[C, s] Subscript[R, L])^2 (w^2
\!\(\*SubsuperscriptBox[\(M\), \(3\), \(2\)]\) +
Subscript[R, 3] (Subscript[R, 2] + Subscript[R, L]/(1 + w^2
\!\(\*SubsuperscriptBox[\(C\), \(2\), \(2\)]\)
\!\(\*SubsuperscriptBox[\(R\), \(L\), \(2\)]\))))^2) /. {Subscript[M,
1]/Sqrt[Subscript[L, 1 i]*Subscript[L, 2]] -> Subscript[k, 1],
Subscript[M, 2]/Sqrt[Subscript[L, 1 i]*Subscript[L, 3]] ->
Subscript[k, 2],
Subscript[M, 3]/Sqrt[Subscript[L, 3]*Subscript[L, 2]] -> Subscript[
k, 3], (w*Subscript[L, 1 i])/(Subscript[R, i] + Subscript[r, s]) ->
Subscript[Q, 1], (w*Subscript[L, 2])/(
Subscript[R, 2] +
Subscript[R, L]*1/(
1 + w^2*Subscript[C, 2]^2*Subscript[R, L]^2)) -> Subscript[Q,
2], (w*Subscript[L, 3])/Subscript[R, 3] -> Subscript[Q, 3]}
