1、The complex-impedance plane or Nyquist format of Fig. 7 should be corrected from authors because is not a right representation of Nyquist formats. A correct Nyquist format is for example: x-axis of 10 cm (Z' 0 - 100 (ohm)) and y-axis 10 cm (Z'' 0 - 100 (ohm)) or x-axis 5 cm (Z' 0 - 50 (ohm)) and y-axis 10 cm (Z'' 0 - 100 (ohm)).
图片在文里,谢谢啦!