Realization of Cole–Davidson Function-Based Impedance Models: Application on Plant Tissues
Abstract
:1. Introduction
2. Approximation and Implementation of the Cole–Davidson Impedance Function
3. Application Example: Cell Membrane of Mesophyll Tissue in Scots Pine Needles
4. Discussion and Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
Abbreviations
CC | Cole–Cole |
CD | Cole–Davidson |
CFE | Continued Fraction Expansion |
CPE | Constant Phase Element |
EIS | Electrical Impedance Spectroscopy |
Appendix A
%% MATLAB CODE
% Part of the code in "C. Psychalinos, and G. Tsirimokou,
% 'Matlab code for calculating the passive elements values of
% RC networks used for approximating fractional-order capacitors',
% 2018, DOI: 10.13140/RG.2.2.10851.20009" is utilized.
%
% The passive element values of Cauer/Foster networks are rounded
% according to "Stephen Cobeldick (2020). Round to Electronic
% Component Values, (https://www.mathworks.com/matlabcentral
% /fileexchange/48840-round-to-electronic-component-values),
% MATLAB Central File Exchange. Retrieved October 6, 2020.
%% ————————————————————————————— %% clear all; %% SPECIFICATIONS X = 1; % number of cell layers Y = 16; % number of cells in each cell layer Roo = 113e+3; Ro = 1.98e+6; Zo = 134e+6; tm = 1.19e-3; % time constant of the membrane alpha = 0.5; % CD order
% Frequency range % in rad/sec wmin = 5E+2; wmax = 50E+6; w = logspace(log10(wmin),log10(wmax),500); % in Hz freq = w/(2∗pi); fmin = 100; fmax = 1e+6;
%% ————————————————————————————— %%
%% APPROXIMATION PROCEDURE
% (1+tm∗s)^alpha s = tf('s'); Z_CD_core = tm∗s+1; % Step 1 Z_CD_core_resp = freqresp(Z_CD_core,w); % Step 2 Z_CD = Z_CD_core_resp.^alpha; % Membrane Impedance model Zm = (X/Y)∗Zo./Z_CD; % Step 3 Zm_resp_data = frd(Zm,w); % Step 4 n = 6; % approximation order Zm_approx = fitfrd(Zm_resp_data,n); % Step 5 [A,B,C,D] = ssdata(Zm_approx); [Znum,Zden] = ss2tf(A,B,C,D); Zm_approx = minreal(tf(Znum,Zden))
% Tissue impedance model
Zt = Roo+((Ro-Roo)/(((Ro-Roo)/Zm_resp_data)+1));
Zt_approx = Roo+((Ro-Roo)/(((Ro-Roo)/Zm_approx)+1));
%% ————————————————————————————— %%
%% IMPLEMENTATION PROCEDURE [num,den] = tfdata(Zm_approx,'v');
%% Cauer I % Continued Fraction Expansion of the Membrane Impedance (Cauer I) [q_CI,expr_CI] = polycfe(num,den); % Calculation of resistors values for Cauer I [R0 R2 R4...R2n] for m1=1:2:2∗n+1; res_CI(m1)=round60063(q_CI{m1},'E48'); end % Calculation of capacitors values for Cauer I [C1 C3...C2n-1] for m1=2:2:2∗n; cap_CI(m1) = round60063(q_CI{m1}(1:1),'E48'); end % storing the values [R0 R2 R4....R2n] [C1 C3 C5...C2n-1] % in the workspace as res_CI and cap_CI [res_CI] = res_CI'; k1 = find(res_CI); res_CI = res_CI(k1); [cap_CI] = cap_CI'; k1 = find(cap_CI); cap_CI = cap_CI(k1);
%% Cauer II % Continued Fraction Expansion of the Membrane Impedance (Cauer II) num_CII = fliplr(num); den_CII = fliplr(den); [q_CII,expr_CII] = polycfe(num_CII,[den_CII 0]); % Calculation of resistors values for Cauer II [R0 R2 R4...R2n] for m2=2:2:2∗n; cap_CII(m2) = round60063(1/(q_CII{m2}(1:1)),'E48'); end % Calculation of capacitors values for Cauer II [C1 C3...C2n-1] for m2=1:2:2∗n+1; res_CII(m2) = round60063(1/(q_CII{m2}(1:1)),'E48'); end % storing the values [R0 R2 R4....R2n] [C1 C3 C5...C2n-1] % in the workspace as res_CII and cap_CII [res_CII] = res_CII'; k2 = find(res_CII); res_CII = res_CII(k2); [cap_CII] = cap_CII'; k2 = find(cap_CII); cap_CII = cap_CII(k2);
%% Foster I % Partial Fractional Expansion for the Membrane Impedance (Foster I) [r_FI p_FI k_FI]=residue(num,den); % Calculation of passive elements values for Foster I % Calculation of R0 rzero_FI = round60063(k_FI(1:1),'E48'); % Calculation of [R1 R2....Rn] and [C1 C2...Cn] for m3=1:1:n; res_FI(m3) = round60063(r_FI(m3:m3)/abs(p_FI(m3:m3)),'E48'); cap_FI(m3) = round60063(1/r_FI(m3:m3),'E48'); end % storing the values [R0 R1 R2...Rn] [C1 C2 C3...Cn] % in the workspace as res_FI and cap_FI res_FI = res_FI'; res_FI=[rzero_FI;res_FI]; k3 = find(res_FI); res_FI = res_FI(k3); [cap_FI] = cap_FI'; k3 = find(cap_FI); cap_FI = cap_FI(k3);
%% Foster II % Partial Fractional Expansion for the Membrane Admittance (Foster II) [r_FII p_FII]=residue(den,[num 0]); % Calculation of passive elements values for Foster II % Calculation of R0 rzero_FII = round60063(1/r_FII(n+1:n+1),'E48'); % Calculation of [R1 R2....Rn] and [C1 C2...Cn] for m4=1:1:n; res_FII(m4) = round60063(1/r_FII(m4:m4),'E48'); cap_FII(m4) = round60063(r_FII(m4:m4)/abs(p_FII(m4:m4)),'E48'); end % storing the values [R0 R1 R2...Rn] [C1 C2 C3...Cn] % in the workspace as res_FII and cap_FII res_FII = res_FII'; res_FII=[rzero_FII;res_FII]; k4 = find(res_FII); res_FII = res_FII(k4); [cap_FII] = cap_FII ; k4 = find(cap_FII); cap_FII = cap_FII(k4);
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Design Equations | |||
---|---|---|---|
Cauer | Foster | ||
Type-I | Type-II | Type-I | Type-II |
Parameters | Non-Infiltrated | Non-Hardy | Hardy |
---|---|---|---|
1/15 | 1/16 | 1/16 | |
(k) | 200 | 95 | 113 |
(M) | 2.04 | 1.55 | 1.98 |
(M) | 203 | 70.54 | 134 |
(msec) | 1.73 | 1.3 | 1.19 |
Parameters | Non-Infiltrated | Non-Hardy | Hardy |
---|---|---|---|
(k) | 36.5 | 13.3 | 26.1 |
(k) | 205 | 75 | 154 |
(k) | 536 | 196 | 383 |
(k) | 1100 | 402 | 825 |
(k) | 2150 | 787 | 1540 |
(M) | 4.42 | 1.47 | 2.74 |
(M) | 4.87 | 1.40 | 2.61 |
1.05 | 2.74 | 1.4 | |
3.32 | 8.66 | 4.22 | |
7.5 | 19.6 | 10 | |
15.4 | 40.2 | 20.5 | |
36.5 | 95.3 | 46.4 | |
147 | 402 | 196 |
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Kapoulea, S.; Psychalinos, C.; Elwakil, A.S. Realization of Cole–Davidson Function-Based Impedance Models: Application on Plant Tissues. Fractal Fract. 2020, 4, 54. https://0-doi-org.brum.beds.ac.uk/10.3390/fractalfract4040054
Kapoulea S, Psychalinos C, Elwakil AS. Realization of Cole–Davidson Function-Based Impedance Models: Application on Plant Tissues. Fractal and Fractional. 2020; 4(4):54. https://0-doi-org.brum.beds.ac.uk/10.3390/fractalfract4040054
Chicago/Turabian StyleKapoulea, Stavroula, Costas Psychalinos, and Ahmed S. Elwakil. 2020. "Realization of Cole–Davidson Function-Based Impedance Models: Application on Plant Tissues" Fractal and Fractional 4, no. 4: 54. https://0-doi-org.brum.beds.ac.uk/10.3390/fractalfract4040054