The scatteringparameter expression of two port properties of impedance Z (in series connection) and admittance Y (in parallel connection) are discussed and their active RC model is presented.
讨论了用散射参数表达的串联阻抗Z和并联导纳Y的二端口特性，给出了它们的有源RC电路模型。
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We reported the main progress made in China in recent years of the study of ultrasonic tissue characterization-propagation velocity, attenuation, scattering and nonlinearity parameter, etc.