查询词典 Doppler shift

Furthermore, we detailed discuss how the size of the atom bunch and Raman laser pulse, together with Doppler frequency shift affect the precision of the measurement of gravity acceleration.

本论文从薛定谔方程出发，研究了拉曼脉冲激光与冷原子系统的相互作用，得出了作用后的密度矩阵方程。

Two common methods of GPS signal coarse acquisition are analyzed and compared in this paper, and an optimized method is adopted. Two common algorithms of calculating fine frequency are analyzed and compared and the conics fitting is designed to calculate the fine frequency. Based on the distributing character of Doppler frequency shift, swing frequency style of Doppler frequency shift search is employed.

对比分析了两种常用的GPS信号粗捕获实现方法，设计了一种优化的实现方法；同时对常用的两种精细载波频率算法进行了比较分析，设计了一种二次曲线拟合的方法计算精细载波频率；基于多普勒频移的分布特点，改变以往顺序搜索的方式，采用跳频搜索的方法。

A software HF channel simulator based on Watterson model was presented according to the characters of multipath, fading, Doppler frequency shift and Doppler frequency spread in HF channel.

对短波信道多径、衰落、多普勒频移及扩展等现象进行了分析，并且基于Watterson离散信道模型，设计了一种全软件的短波信道模拟器，为短波通信系统性能测试提供了条件。

All the above researches are very important to the usage of thelaser Doppler technique in seismic prospecting.The laser Doppler frequency shift of scatters and diffract grating was discusstheoretically.

鉴于地震检波器是制约高分辨地震勘探的重要瓶颈，研究应用激光多普勒效应的新型地震检波器是重要工作之一。

In this paper,the effect of time-delay and Doppler frequency in acquisition of PN code is analyzed, using maximal-length shift register sequence as research object. It is shown that delay-Doppler cross effect is neglectable in most cases.

以m序列为研究对象，首先针对一种典型的相关过程分析了其时延、多普勒频移对相关的联合影响，结论表明两者耦合影响非常小，几乎可忽略不计。

The Doppler frequency shift and the Doppler broadening are comprehensively utilized, the narrow-band phase plate is inserted between a collimating mirror and a focusing lens of an imaging probe, thereby implementing the spatial encoding of the Doppler information, realizing the imaging requirements on the spatial high-resolution three-dimensional speed vector, combining with the Doppler OCT method which is based on the phase resolution technology to meet the high-speed and high-sensitivity measurement requirements and finally realizing the speed vector imaging with high-resolution, high-speed, high-sensitivity and large-imaging range of the three-dimensional flow field of the microfluidic chip.

综合利用多普勒频移和多普勒展宽，并在成像探头的准直镜和聚焦透镜之间插入窄带相位片，实施多普勒信息的空间编码，实现空间高分辨三维速度矢量的成像要求，再结合基于相位分辨技术的多普勒OCT方法则能够满足高速度高灵敏度的测量要求，最终实现对微流控芯片立体流场的高分辨率、高速度、高灵敏度、大成像范围的速度矢量成像。

In this dissertation, a new method of atmospheric wind measurement using an incoherent lidar is presented. The method is to detect Doppler shift by the transmission outline of iodine absorption filter.

本文提出了利用非相干多普勒激光雷达测量大气风速的新方法，即利用原子滤波器透射率翼检测多普勒频移的方法。

A refined frequency scaling algorithm was deduced,which was suitable for airborne SAIL in stripmap model and was taking the Doppler shift term into account.

推导出在该模型下一种适用于机载合成孔径成像激光雷达系统的频率变标算法，一并考虑了在连续波信号模型中多普勒频移项对成像的影响。

By comparing the spectra obtained from two different slow-wave structures, we get the conclusion that Doppler shift of an atom in slow-wave field varies with sin of the pitch angle of the helix structures.

通过比较两种不同几何尺寸的慢波结构产生的场与原子束作用得到的微波谱，得出了在螺线管结构的慢波场中，原子的多普勒频移随螺距角的正弦减小而增大的结论。

The factors that may hamper the recycling, the split of atomic levels due to Zeeman effect and the increase of Doppler shift in a slow-wave field, are analyzed and the possible ways to solve them are suggested.

并就当前阻碍实验顺利进行的磁场中基态能级塞曼分裂和慢波引起的多普勒频移的增大等因素进行了分析，提出了解决问题的可能途径。

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