方法采用超声脉冲反射法，着重就血栓形成过程中对其声速变化的相关性进行了定量研究。
Methods By using the ultrasound pulse reflection law, the correlation between the process of thrombosis formation and changes in the ultrasonic velocity was studied quantitatively.
对A扫描脉冲反射法应用于检测药料中杂质进行了探索研究，试验结果证实用超声法检测药料中的非金属杂质具有一定可行性。
A-scanning impulse reflection method is applied to detect the nonmetallic. The result approves that using ultrasonic to detect nonmetallic is feasible.
由激光超声方法和自发自收脉冲反射法实验测定了所制作的换能器的频率响应，并比较了频谱分析结果。
The frequency response of the transducers is measured experimentally using laser ultrasound and a pulse echo reflecting method. The spectral analysis results are compared and analyzed.
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