This paper presents a study of the reflection of sound pulse from porous material in the ease that the impulse sound source and receiver are located on a line perpendicular to the surface of material.
本文提出当脉冲声源和接收点在同一条垂直于材料表面的直线上时，声脉冲从多孔材料反射的研究。
The automatic testing method of cable fault is characterized by that the pulse signal transmitted and received by pulse reflection test circuit can be directly superposed on the output end of d.
电缆故障的自动测试方法，其特征在于是将脉冲反射测试电路发射与接收的脉冲信号直接叠加到直流高压测量电路的输出端，直流高压测量电路的输出端与被测电缆端口连接。
The reflection and the refraction of the pulse electromagnetic waves at a dielectric interface were calculated and analyzed based on the FDTD method and PML technique.
利用FDTD法和PML技术计算分析了平面分界面对脉冲波的反射和折射，充分而形象地描绘平面界面对脉冲波反射的时域过程。
The effect of vascular compliance and pulse wave velocity and reflection on these parameters were analysed in detail.
详细分析了血管顺应性、脉搏波波速等对这些参量的影响。
Studies have been made on the influences of the second order derivatives of the amplitude and phase of the reflection coefficient on the Gaussian pulse upon reflection from the dielectric mirrors.
研究了介质镜反射系数的振幅与位相二阶导数对飞秒高斯脉冲的影响。
The operating distance of a laser radar system is determined on pulse energy, pulse width, beam divergence angular, atmosphere attenuation, target reflection, receiver sensitivity and so on.
激光雷达系统的作用距离由下列因素决定：脉冲能量、脉冲宽度、光束发散角、大气衰减、目标反射率和接收机灵敏度等。
The pulse width and impact velocity as small as possible on the premise that can obtain reflection from the pile toe.
在能够获得桩底反射的前提下，脉冲宽度和敲击速度尽量小。
The pulse width and impact velocity as small as possible on the premise that can obtain reflection from the pile toe.
在能够获得桩底反射的前提下，脉冲宽度和敲击速度尽量小。
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