您要查找的是不是：
- echo wave speed 回波速度
- Wave speed equals frequency times wavelength. 波速等于频率乘以波长。
- According to the principle of ultrasound detection, this thesis describes a high-speed sampling system for ultrasound emergent wave and echo wave. 摘要根据定量超声波检测原理，阐述了一种针对超声波发射信号和回波信号的高速采集系统。
- The propagation velocity of ultrasound in patient's shinbone can be achieved by figuring out the time span between emergent wave and echo wave. 根据相关公式，只需计算出超声波发射信号和回波信号的时间差，即可获得定量超声波在受试者胫骨的皮质骨中传播速度。
- By sweeping a laser along the pipe to change the local wave speed, physicists might be able to create a horizon. 将雷射沿著管路扫过，可以改变局部的波速，运用这种方式，物理学家也许可以创造出视界来。
- The the-oretical and practical significance of the"wave speed theory of flow limitation"proposed by Dawson is preliminarilyidentified by these facts. 这一事实也初步验证Dawson等提出的“流量限制的波速学说”的理论和实用意义。
- The weathering of rock are zoned in terms of the ratio of wave speed, integrality index of rock mass and rock quality index. 运用岩体波速比、岩体的完整性系数、岩石质量指标分别对岩体风化进行了分带；
- Aimed at the characteristic of discreteness of the coal sample, pulse-penetrating method is used to measure the acoustic wave speed and the strength test is finished on MTS815. 采用超声脉冲穿透法测量煤样波速并进行岩石力学试验,回归分析得出了煤岩试件声速与其力学参数之间的关系式,为尽可能避免因煤样离散性而带来的盲目试验提供了一条技术途径。
- The paper briefly investigates the ultrasonic testing of hydrogen-induced cracking (HIC) for in-service LPG tanks , and analyses types of echo waves of the cracking. 简要地探讨液化石油气贮罐母材中氢致分层类缺陷的超声波检测,对检测的几种超声波反射波形进行了分析,并给出了确定缺陷边界和深度范围的方法。
- The results of drilling tests proves that the remaining compressive strength, electromagnetic wave speed, and the covered area of electromagnetic wave amplitude are related. 实验最后以钻心试验印证了，混凝土火害后残馀强度与电磁波波速以及电磁波其振幅包覆之面积是有相关连的。
- Simulation of Landform's Echo Wave Based on DEM 基于DEM的雷达地杂波仿真
- By theoretical analysis of several electronic wave spee d, it is concluded that the electronic wave speed is virtually the information sp eed to build up the timespace image of electron. 通过对几种电子波波速的理论分析，得出电子波波速实质上是电子建立时空形象的信息速度。
- The Molde YB-GT-3 Automatic Can Vacuum Sorter based thereon, with a probe detecting echo waves cyclically proves to be of high sentivity and reliability, competent to check and sort the majority of various cans for low vacuums. 应用这个方法制成的YB-GT-3型罐头真空度自动分选机适合国情,灵敏可靠,能对大部分品种的罐头进行低真空度的自动分选。
- Analyses results show that the materials, tension and rigidity of wires, speed of trains, wave speed, and lift forces are primary factors that affect fatigue life of contact wires. 分析结果表明，接触导线线质、张力和刚度以及列车运行速度、波动传播速度和抬升力是影响导线疲劳可靠性的主要因素。
- Finally the effects of the roughness and flatness of specimen on the surface wave speed are carefully analyzed, and the methods for resolving the problem are verified by the experiment. 同时分析了试件表面粗糙度和平整度对表面波速度变化的影响，最后给出了金属材料在不同表面条件下的实验分析结果。
- But as the waves enter shallow waters, friction with the ocean floor lowers the waves' speed and raises their height... 但随着这些波浪进入浅水区，与海底的摩擦降低了波浪的速度但提高了它们的高度...
- The Echo Wave and Its Transmit Character in Traffic Flow 交通流中的回波及其传播特征
- By theoretical analysis of several electronic wave spee d,it is concluded that the electronic wave speed is virtually the information sp eed to build up the timespace image of electron. 通过对几种电子波波速的理论分析，得出电子波波速实质上是电子建立时空形象的信息速度。
- Her performance was cheered to the echo. 她的表演获得长时间的喝采。
- The calculation method of primary wave and second wave speed were studied when the oil saturation and effective pressure of unconsolidated sandstone reservoir with high porosity in X Oilfield changed. 研究了X油田高孔低胶结砂岩储层在含油饱和度和压力变化时纵、横波速度计算方法,并将计算数据与实际测井资料进行了对比。
