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.
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。
In addition to the current source, the detecting instrument mainly contains the circuits for temperature compensation, pulse formation, pulse duration discrimination and encode, decode.
检测仪器除了恒流源外，主要还有温度补偿、脉冲形成、脉宽鉴别以及编码、译码等电路。
The effect of the pulse discharging parameters on the formation and hardness of the TiC coating was investigated.
讨论了脉冲放电工艺参数对涂层形成与涂层硬度的影响。
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