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。
Acoustic velocities of tap water and polymer solution were studied using ultrasonic-pulse reflection method in the laboratory. Polymer density and apparent viscosity were measured.
采用脉冲反射法在实验室条件下对自来水和不同浓度聚合物溶液的声速进行了测量研究，经测量得到了聚合物溶液的密度、表观粘度。
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。
As a result, this method offers much better reflection coefficients than ordinary segmental pulse deconvolution does.
因此，此法要比普通分段脉冲反褶积求解反射系数的精度高得多。
It is indicated that the interfacial reflection affects the parameter estimation of narrow CW pulse significantly so that some measures should be taken in practical application.
分析结果表明：界面反射对窄cW脉冲信号的参数估计有重要影响，在工程设计中应采取适当措施加以克服或补偿。
Any process that will compensate for such distortions of the initial pulse should improve reflection quality.
任何补偿这类初始脉冲畸变的处理，都能改善反射波的质量。
The deformation from geometrical reflection for Gaussian light pulse under total internal reflection at a planar interface are discussed.
本文研究了高斯型脉冲光束在界面上发生全反射时与几何光学不相一致的一些现象。
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。
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。
A new reflection type hybrid optical sensor is designgd which has the ability to measure stably pulse wave-forms coming from the surface of the skin.
本文介绍一种新型反射型混合光学传感器，用它能稳定地检测从体表反射的脉搏波。
This paper presents a theoretical analysis of the reflection of a sound pulse by the plane interface between the air and an idealized porous medium.
本文在理论上分析球面脉冲声波在空气和理想的多孔性媒质界面上的反射问题。
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 width of the reflection pulse is increased and its amplitude reduced as the rise time of incident wave delays, which may to some extent be good for the detection of insulation faults.
入射波上升时间增长，反射脉冲变宽，幅值降低，但一定程度上有利于检测出绝缘故障。
The pulse energy and pulse width for different small signal transmission ratios of Q-switching crystal and different reflection indices of output mirror were simulated.
重点分析了调Q晶体小信号透过率和反射镜的反射率对激光器的输出能量、脉冲宽度的影响。
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。
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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