查询词典 velocimeter

The calculated results of average velocity were in good agreement with experimental data measured by Laser Doppler Velocimeter.

计算的水流流速分布与用激光多普勒测速仪所测得的试验结果基本一致。

Laser Doppler Velocimeter:the two times Dopper effect for the scattered light from the tracing particle, the formula of LDV, laser heterodynes measurement, dual beam differential mode, LDV signal processing, frequency shift technique and application, multi-dimension velocity measurement, LDV application while light is refracted.

三。 激光多普勒测速：运动粒子中散射光的二次多普勒效应（1），LDV基本公式(1)，光外差检测技术及其实现(1)，双光束差动模式(1)，LDV信号处理(3)，频移技术及其应用(5)，多维速度的测量(5)，有折射现象时LDV的应用(3)，LDV测量实例(1)。 LDV实验一：LDV光路实验（3） LDV实验二：LDV测水流场实验（3）四。

In order to decrease the measuring error of signal processing in laser Doppler velocimeter, frequency spectrum correction methods for lacer Doppler signal were proposed. Basic principles of energy centrobaric correction, ratio correction and phase difference correction were expounded. The three methods processing ideal sinusoidal signals was simulated with different signal frequencies, and so was the ratio method processing sinusoidal signals with different noises and signal to noise ratios.

在激光多普勒测速仪中，为了减小由信号处理算法带来的测量误差，提出运用频谱校正算法对多普勒信号的频谱进行校正，详细阐述了能量重心法、比值法和相位差法3种离散频谱校正算法的基本原理，运用这3种算法对理想正弦信号进行仿真，并运用比值法对信号施加不同频率和信噪比的噪音下的正弦信号和实测的多普勒信号进行仿真及实验研究。

Using a combination of fiber array,electron-multiplier phototube and digital oscilloscope for recording a comb fringe signal,the velocimeter was capable of 1 ns time resolution and 86 μm spatial resolution.

系统采用梳状干涉条纹做为信号载体，利用1维光纤阵列＋光电倍增管＋数字示波器替代变像管扫描相机作为记录设备，记录伪推挽四路干涉信号，实现1 ns时间分辨和86 μm空间分辨。

A three-dimensional-acoustic Doppler velocimeter is used to measure the velocity near the wall. Measurement of velocity in indirect method is used to determine the tangential stress on the wall. The hair of palm is used to imitate the vegetation.

采用多普勒流速仪测量边壁附近的流速，用间接法中的流速测量法测量边界上的切应力，用棕榈毛作为植物的模拟材料。

A new type of the time-flight velocimeter is reported.

本文报告了一种新型飞行时间测速仪。

Compared with tranditional radar velocimeter, the latest laser velocimeter has great improvement in performance.

比起老式的雷达测速仪，最新的激光测速仪的性能有了明显的提高。

In order to meet the need of laser doppler velocimeter inland,a dual-beam direction recognizable LDV is designed in this papper.

针对国内对激光多普勒测速仪的需求，本文设计并研制出一套双光束可识别方向的激光多普勒测速仪。

In the control system for skin pass mill elongation,the measuring devices in common use are pulse generator and laser velocimeter ,of which the control accuracy of the laser velocimeter is higher.

在平整机延伸率控制系统中，常用的测量装置是脉冲发生器和激光测速仪。

Indoor model test for hydraulic characteristics of common floating vegetation channels in ecological restoration was carried out. Healthy Pistia stratioes linn was planted in the rectangle model river-course in different shapes. The velocity of flow in different situation was measured by three-dimensional acoustic Doppler velocimeter. The change of the rule of velocity was analyzed.

通过在矩形水槽中按不同方式种植个体较小、生长旺盛的大吀进行室内模型试验研究，利用三维超声波多普勒测速仪（acoustic Doppler velocimeter， ADV）分别测量按不同形状种植漂浮植被的矩形水槽中水流的瞬时流场，分析了植被附近区域水流在种植植被前后沿垂线方向的流速分布规律。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。