In order to detect defects in pipes effectively, by using PZT transducers, which are attached axis-symmetrically around the pipe, to generate and receive ultrasonic guided waves, the relationship between the echo peak-to-peak amplitude of echoes of the pipe end and defect and the exciting frequency was studied.
为了有效地检测管道缺陷,使用PZT传感器在管道中激励并接收超声导波,采用轴对称激励接收的方法,通过多组实验研究了导波在一定频率范围内管道端部与缺陷的第1次反射回波的幅值大小与频率之间的关系,分析了传感器中探头个数对信号大小的影响,确定了激励导波的最佳频率范围。
The reflection and intersymbol interference in cable networks;
同轴电缆网络的回波反射及其产生的码间干扰分析
pulsed echo ultrasonoscope
回波反射式超声诊断仪
Research of Hailstone Detection Based on Radar Echo Reflectivity Image;
基于雷达回波反射率图的冰雹识别系统的研究
The reflected sound waves are then converted into a picture.
反射回来的声波然后转化成照片。
To repeat(a sound) by the reflection of sound waves from a surface.
发出回声表面反射声波而重复的声音
a sky wave that is reflected by the ionosphere.
通过电离层反射回来的天波。
Depending on the nature of the reflecting objects, the intensity of the reflected beam will vary.
随着反射目标的性质不同，反射回来的波束强度也就不同。
Repetition of a sound by reflection of sound waves from a surface.
回声因表面反射声波而引起的声音重复
Echo:Repetition of a sound by reflection of sound waves from a surface.
回声:因表面反射声波而引起的声音重复.
Basic Study on Coherence of the Satellite Echoes of Laser;
激光经卫星反射的回波的相干性初步研究
Demonstrating of Formula About Echo Pressure Reflected from Several Regular Reflectors
几种规则反射体回波幅度计算公式的论证
The sounds bounce off rock layers below the sea floor and are picked up by the phones.
声波从海底之下的岩层反射回来并由检波器接收。
Influence of reflection of the output port on beam-wave interaction in gyrotron traveling wave amplifier
回旋行波放大器输出端反射对注-波互作用的影响
The mirror reflects light back to the scatter plate.
镜面把光反射回散射板。
free from reflected wave antenna
防反射波天线, 反射波抑制天线
deghost inverse filter
消除虚反射反滤波器
Amazingly enough, a beam of electrons had thus been diffracted in a manner completely analogous to a light wave bouncing off a reflection grating.
一束电子波衍射的方式，同光波从一个反射光栅上弹回的方式完全类似，这真是不可思议。
The ratio of the amplitudes of the reflected and incident waves is termed the reflectivity or reflection coefficient.
反射波振幅与入射波振幅的比率称作反射率或反射系数。
Instead, most of the incoming energy reappears as the reflected wave.
相反，大部分入射能量都重现为反射波。