查询词典 wave velocity

The numerical results show that lossy dielectric-load can heighten the start oscillation current of absolute instability, and increase depends on the magnetic field strength and the perpendicular-to-parallel velocity ratio of the electrons; The thickness of the lossy waveguide increases the start oscillation length of backward wave oscillation.

结果表明：损耗介质的加载，可以提高绝对不稳定性起振电流，提高的幅度依赖于工作磁场偏离饱和磁场的程度、电子束横纵速度比等；增加波导损耗介质加载的厚度，可以提高竞争模式的回旋返波起振长度。

Tsunami waves are long waves of gravity, the wavelength of up to 100 kilometers above; its velocity equal to the acceleration due to gravity (9.8 m / s) and the product of the square root of water depth, so the deeper the water, the faster the tsunami wave, the more shallow water , the slower the speed of tsunami waves.

海啸波是重力长波，波长可达100公里以上；它的传播速度等于重力加速度（9.8米／秒）与海水深度乘积的平方根，所以，海水越深，海啸波速度越快，海水越浅，海啸波速度越慢。

Theoretical and experimental investigation on the evolution of the atomic system with gaussian velocity distribution in a laser plane wave, in which the theoretical predications is in good agrement with the experimental results.

3在理论上和实验上系统地研究了高斯速度分布原子系统在激光行波场中的演化过程及其和激光光强、失谐、作用时间等物理参量的关系。理论和实验结果基本一致。

After graduation, he continued to work at the same institute, engaged in the research of shock wave propagation in solids, hyper-velocity impact and shock wave consolidation. He obtained PhD in applied mechanics from the University of Cambridge in 1998 with a thesis about constitutive relations and elastic waves for cellular solids modeled as a micropolar solid.

毕业后继续在力学所从事高温高压下固体中冲击波传播、高速冲击及爆炸冲击波压实金属粉末的机理研究。1998年获英国剑桥大学应用力学博士学位，论文研究胞状固体材料本构关系及微极材料中弹性波传播的问题。

In land areas with highvelocity rock outcrops,the seismic data recorded by vertical geophone deviate from the data of reflected compression wave with the increment of dip angle of strata and incident angle of reflection wave,which results in the difficulties of conventional seismic exploration in the near-surface high-velocity rock outcropped areas.

结果表明，当近地表速度为低速时，可以将垂直检波器记录的地震记录近似等同于反射纵波记录，这就是常规地震勘探在低速带区勘探取得成功的原因之一；当近地表速度为高速时，随着界面倾角和入射角的增加，垂直检波器记录的地震记录等效为反射纵波记录的误差增大，这就是存在高速近地表区地震勘探的难点之一。

Pulsed Doppler echocardiograph was used to test separately blood flow velocity wave of ascending aorta arcus, aorta and abdominal aorta in of 17 patients with aortic insufficiency with nonliner factor and results compared with those of 15 normal subjects of the same ages. The purpose was to disclose the regulation of blood flow waveform distortion in arterial system and the existance of shock wave.

应用超声多普勒对存在非线性因素的17名主动脉瓣关闭不全患者的升主动脉、主动脉弓以及腹主动脉进行分段逐点测试血流速度波，并和年龄相匹配的15名健康受试者为对照进行前瞻性探究，以探索人体动脉系统中血流波形畸变的规律及激波的存在。

Pulsed Doppler echocardiograph was used to test separately blood flow velocity wave of ascending aorta arcus, aorta and abdominal aorta in of 17 patients with aortic insufficiency with nonliner factor and results compared with those of 15 normal subjects of the same ages. The purpose was to disclose the regulation of blood flow waveform distortion in arterial system and the existance of shock wave.

应用超声多普勒对存在非线性因素的17名主动脉瓣关闭不全患者的升主动脉、主动脉弓以及腹主动脉进行分段逐点测试血流速度波，并与年龄相匹配的15名健康受试者为对照进行前瞻性研究，以探讨人体动脉系统中血流波形畸变的规律及激波的存在。

Sections such as P- and S-wave impedance, velocity ratio of P- and S-wave,λρ, and μρ, as well as crossplotting sections of different lithological parameters were generated.

利用这些成果，可以得到比常规波阻抗反演更准确、更丰富的储层信息，在目标储层的含气性识别中取得了很好地效果。

A detailed mathematical analysis of fluctuation index of the plane wave and spherical wave in different altitudes, the wind velocity near the earth and the structure constant of atmosphere near the earth were analyzed in light of the ITU-R model.

研究结果表明，斜程传输在弱起伏情况下，利用修正Rytov方法得到的结果与经典Rytov方法结果基本上是一致的。

Like the case of the VTI, only the nonhyperbolic traveltime data of the P-wave are not sufficient to retrieve the three parameters V_(p0),εandδ, suggesting that the inversion can be performed by using multiazimuth nonhyperbolic (long-spread) P-wave reflection traveltime data, and vertical velocity from check shot and drill or log well data.

对于VTI介质，P波反射由V_(p0)、ε和δ三个参数来描述，在其它资料给出垂直速度V_(p0的前提条件下，ε和δ两个参数可由近偏移距NMO速度和远偏移距四次时差系数(A_4)两个条件来约束反演，那么反演解是唯一的。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。