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【答案】应助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 感谢参与,应助指数 +1 857688363: 金币+4, 感谢应助 2012-07-11 20:04:37 目标北大: 金币+20, ★★★很有帮助, 太谢谢了!! 2012-07-11 20:33:13
Rs-R,Rs-T,Rs-P?
LZ指的是Ws-R,Ws-T,Ws-P吧~
首先,Ws是Warburg扩散阻抗,是Finite Length Warburg。
公式1,扩散阻抗Z = R*tanh([I*T*w]^P) / (I*T*w)^P
其中含有三个参数R、T、P: Ws-R, Ws-T, Ws-P
This element is also known as a Generalized Finite Warburg element (GFW). It is an extension of another more common element, the Finite-Length Warburg (FLW).
To use the FLW equation, set Ws-P = 0.5 and set its freedom to 'fixed'.
The FLW is the solution of the one-dimensional diffusion equation of a particle, which is completely analogous to wave transmission in a finite-length RC transmission line.
In the diffusion interpretation Ws-T = L^2 / D. (L is the effective diffusion thickness, and D is the effective diffusion coefficient of the particle).
The GFW is similar to this, but for it the square root becomes a continuously varying exponent Ws-P such that 0 < Ws-P < 1.
If the data exhibits only the high frequency (45 degree slope) behavior and not the transition to low frequency behavior, either Wo-R or Wo-T must be set as Fixed(X). Alternately, a CPE can be used in this situation.
This version of the Warburg element is terminates in a finite resistance. At very low frequencies, Z' approaches Ws-R and Z" goes to zero. |
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