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.

本文报道了近年来我国在生物组织超声特性——传播速度、衰减、吸收、反射、散射和非线性声参量方面的研究进展情况。

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The results show that relative temperature differences between the linearly anisotropic scattering and isotropic scattering media are approximately proportional to the scattering asymmetry parameter.

结果表明，各向异性散射与各向同性散射介质间的相对温度差异与散射不对称参数近似成正比。

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The scattering parameter 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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