查询词典 Doppler shift

There are two classes of flow velocity estimation methods: Doppler frequency shift based methods and velocity—time delay based methods.

基于超声射频的血流运动估计方法主要有两大类：基于多普勒频移的流速估计方法和基于速度—时移的非多普勒方法。

The channel property of frequency selective fading and Doppler frequency shift are the biggest challenge to the broadband mobile communication service.

在信道的衰落特性中，对宽带无线移动业务影响最大的是多径衰落和多普勒频移。

To measure the satellite oscillator frequency accurately is of great significance for transmitting time and frequency information by satellite,and the difficult point of the measurement is to deal with the Doppler frequency shift.

星载振荡器频率的测量对利用通信卫星进行标准时间和频率传递有重要的意义，测量的难点是多普勒频移的处理。

Its characteristic is through impulse stimulation by using the grating width, diffraction series, laser wavelength, and the Doppler frequency shift to determine the shock velocity and the shock acceleration instantaneous value.

对差动式光栅激光干涉冲击校准装置的原理作了介绍，特点是使用冲击激励，通过光栅的栅距、衍射级数、激光波长及激光的多普勒频移来最终确定冲击速度和加速度的瞬时值。

Ship to receive satellite signals for ships and satellites to changes in the relative position of the frequency of changes, called the Doppler frequency shift can be used to determine the satellite position, while the ship's position is located in a satellite location for the focus of hyperboloid , taking into account pairs of curved intersection line with the Earth's surface, then the boat is located on the intersection of two curves.

航船上接收卫星讯号因船与卫星相对位置的变化而发生频率变化，叫做多普勒频移，可用于确定卫星位置，而船位位于以卫星位置为焦点的双曲面上，考虑到双曲面与地球表面的交线，则船位于两条曲线的交点上。

Orthogonal detection can give us both the amplitude information for gray-scale imaging and phase shift information for doppler spectrum analysis.

正交检波方法既能给出灰度超声成像所需要的回波的幅值信息，也能给出多普勒超声成像所需要的回波的相移信息。

This paper concerns relative technologies about carrier frequency synchronization and estimation in downlink signal in large Doppler frequency shift condition.

本文对大多普勒频移情况中，下行信号载波频率同步估计的相关技术进行了研究。

A new three-dimensional laser Doppler velocimeter (3D LDV) by only using frequency shift separation method has been developed.

研究一种采用频移分离方法的新型三维激光多普勒测速仪(3DLDV)。

NEXT, the effects of trailing edge noise directivity and convective amplification2 (including the Doppler frequency shift) are applied to these radial source strengths , to obtain the effective noise source distribution in the rotor plane ,as perceived by an observer position was taken to be the position.

其次， 后缘噪声方向律的作用和对流amplification2 向这些辐形来源力量被运用，获得有效的噪声源发行在电动子飞机，as 由职位被接受是位置的观察员察觉。

In Doppler effect, Gravitational red shift and Compton effect as it changes frequency the photons (including γphoton ) always abide by constant principle of light speed ,which proved that the photon has zero mass.

在多普勒效应，重力红移和康普顿效应中，光子在频率发生变化时总是遵守光速不变原理，由此证明了光子具有零质量。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了