瞬时速度

这些就是v的定义，也就是瞬时速度。

So that 's the definition of v , instantaneous velocity .

用修正的RELIEF方法测量高速空气流瞬时速度的理论研究

Study on Instantaneous Velocity Measurement of High Speed Air Flow by Modified RELIEF Method

湍流旋流燃烧瞬时速度PDF的实验测量

Measurement of PDF for the instantaneous gas velocity in swirling turbulent combustion

利用朗威Llongwill~（TM）探究瞬时速度和平均速度的关系

Exploring the relation between average speed and instantaneous speed using " Llongwill ~ ( TM )"

提出了一种用于测量微机电系统（MEMS）器件瞬时速度、位移的测量系统。

A system used for testing transient velocities and displacements of the micro-electronic-mechanical system ( MEMS ) devices is presented .

气固两相射流瞬时速度场和浓度场的PIV研究

Particle imaging velocimetry of instantaneous velocity and concentration distributions in gas-solid two-phase jet flows

采用同步瞬时速度辨识的方法，以数字信号处理单元（DSP）为核心控制器件来实现无速度传感器矢量控制的交流调速系统。

In this paper , synchronizing instant speed identification method is adopted , and taking DSP as core component to realize speed sensorless vector control AC speed regulation system .

利用GPS技术调查了宁波市不同道路汽车行驶工况，记录了实际道路汽车行驶瞬时速度的大量数据。

Driving patterns on different roads were investigated in Ningbo city using advanced instruments GPS . A large amount of testing data of speed were obtained under real road conditions .

对平流层ISAR平台瞬时速度对成像的影响也做了计算分析。

Also , we do the calculation and analysis of the effect ISAR platform instantaneous velocity to the imaging . 3 .

利用三维激光粒子动态分析仪（PDA），测量了燃烧室内有气相燃烧的高温气固流动的两相瞬时速度场。

The Three-Dimension Laser Particle Dynamic Analyzer ( PDA ) was utilized to measure the instantaneous velocity of high temperature gas-particle flow with gaseous combustion .

在猝发过程中，水面近区的流向和垂向瞬时速度以及Reynolds切应力出现较大幅度的脉动，它们与低速流体条带的喷射行为对应；

During a bursting process , the instantaneous velocities and Reynolds shear stress near the air-water interface fluctuate in relatively large amplitude , which appear to be associated with the ejection phenomena of low-speed streaks .

通过船载或浮标的GPS多普勒测量，可以实时测定载体的三维瞬时速度，积分变换后可以反演出测点处的波面起伏，结合谱分析的方法可以获取平均波高、平均周期等海浪参数。

Based on the velocity vector from GPS Doppler measurements on the ship or buoy , the wave instantaneous variation can be obtained after the integral performance . Combined with spectral analysis method , the mean wave height , mean period and other parameters can be extracted .

本文建立了采用分级进风的旋流燃烧室实验台，实现了用三维激光粒子动态分析仪（PDA）测最湍流旋流燃烧的热态瞬时速度场。

A test facility for swirl combustor with staged air injection was fabricated and set up . The Three Dimension-Laser Particle Dynamic Analyzer ( PDA ) was utilized to measure the instantaneous gas velocity of the swirling turbulent reacting flow .

光流场表征了运动目标的速度信息，是一种基于平面图像的二维（2D）瞬时速度场，二维速度是物体上可见点的三维速度在成像平面上的投影。

Optical flow field represents the motion information of the moving object . It is a two-dimensional ( 2D ) instant velocity field based on a corresponding 2D image , of which the velocity is the projection in a plane from a three dimensional velocity .

与传统的测试技术相比，PIV技术避免了测量中测试仪器对流场的干扰，并且克服了以前只能单点测量的缺点，可以获得整个测试流场的瞬时速度场，而且具有较高的精度。

Compared with the traditional measuring technologies , The PIV avoids the interference of testing instruments with fluid field and overcomes the shortcoming of previous signal point testing , so the instantaneous velocity field with high precision can be obtained .

通过瞬时速度场的测量结果，获得了燃烧室内各测点上气体轴向与切向瞬时速度的概率密度函数（PDF），揭示了热态速度场的湍流脉动特性。

The probability density functions ( PDF ) for the gas axial and tangential velocities at each measuring location are obtained from the measured data of the instantaneous gas velocity . The results delineate the turbulent fluctuating properties of the reacting flow field .

PIV技术的优点是突破了空间单点测量技术的限制，实现全流场瞬态测量，且对流场无干扰，方便获得流场的瞬时速度场。

It is advantage of PIV technology to break through the spatial simple point survey technology limit , realize the entire flow field transient state survey without disturbing the fluid , and easy to obtain the instantaneous field of velocity in the fluid .

利用IFA300型二维恒温热线风速仪系统对双旋流气体燃烧器模型的冷态流场进行了实验研究，测量了流场内不同位置瞬时速度分布及湍流强度特性。

An experimental study was conducted of the cold-state flow field of a dual swirl gas burner model through the use of an IFA300 type two-dimensional constant-temperature hot-wire anemometer system .

生产过程中物体瞬时速度非接触测量

Non-contact measuring for instantaneous velocity of solid surface in industrial production

飞机鸟撞试验瞬时速度的连续测试方法研究

Research for the Instantaneous Velocity Measurement in Aircraft Bird-Impact Test

矿井提升机瞬时速度图的测试分析

Checkout and analysis for instaneous velocity diagram of mine hoist

研究了高中物理中理解瞬时速度概念的实验。

The experiment measuring instantaneous velocity in senior middle school is discussed .

空间大型可展开天线展开末瞬时速度控制研究

The study on Control for the final velocity of the space deployable antenna

光电码盘的仿真模型及电机瞬时速度估计方法的研究

Simulation Model of Optical Encoder and Estimation of Instantaneous Velocity for a Motor

关键词：无监督式类神经网路、影像辨识、瞬时速度。

Keywords : unsupervised artificial neural network , image identification , instantaneous velocity .

发动机停车瞬时速度（指发动机因力量或速度不够）熄火

( of an engine ) stop suddenly because of insufficient power or speed

它能在流动的流注中的指定点上监测瞬时速度。

It can monitor the instantaneous velocities at specified points in a flowing stream .

瞬时速度的测量原理及测量方法

Measure Principle and Method of Instantaneous Velocity

另外，还分析了排气孔口瞬时速度的影响因素，对瞬时速度进行了计算。

In addition , the instantaneous velocity is calculated , and its influencing factors are analyzed .

利用积分算法，实现了对瞬时速度、制动距离和制动时间的测量。

Using integral algorithm to realize the computing of braking speed and braking distance and time .