查询词典 instantaneous angular velocity

An example of another type of anemometer in which the airstream displaces an indicator giving an instantaneous reading of velocity or flowrate is the rotameter.

另一类流速计的典型代表是转子流速计。这种仪器的工作原理是气流使一指针偏转，指示出瞬时速度值。

The main difficulties of SPIV measuremnts in turbomachines such as the laser light reflection and the dispersion of tracer particles were properly resolved in the experiment, and the instantaneous velocity distributions of several cross sections in the blade tip region were successfully measured at the design and near stall conditions, respectively.

在压气机SPIV测量中，激光反光的控制和示踪粒子的均匀稳定散播是决定成败的关键因素。

According to instantaneous velocity fields and vorticity fields measured with SPIV, detailed analysis of the evolution of tip leakage vortex at both design and near stall conditions is presented in this thesis and the different phases of the evolution of the tip leakage vortex, the formation, becoming unstable and the interaction between small-scale vortices and the mainstream can be clearly observed in the experiment results.

SPIV测量结果表明压气机转子叶尖泄漏涡在设计和近失速状态下均存在形成、发展壮大和失稳分裂的演化过程。

Two mathematical models have been deduced in the case of dense-phase and light-phase conveying respectively. Combining the capacitance phase concentration sensor designed and the traditional Venturi flow meter, the powder velocity and instantaneous mass flowrate are obtained by measuring concentration and differential pressure signal.

本文最后提出了一种差压—浓度法测量气/固两相流瞬时质量流量的新方法，分别建立了稀相和浓相输送情况下的粉料速度和流量测量的数学模型，即将所研制的电容式相浓度传感器与传统的文丘里流量计相结合，通过测量浓度信号及差压信号，求得粉料的传送速度及其瞬时质量流量。

The instantaneous regurgitant velocity profiles obtained from the mitral heart valve prothesis test installed in a mock circulatory loop can be used to evaluate the regurgitation characteristic of the MHVP in vitro.

所获得的实验结果为评定二尖瓣替代物返流特性提供了可信的依据。标签激光多普勒测速声光扫描心瓣返流瞬态流速分布 LDA acousto-optic scanning instantaneous regurgitant velocity profiles

According to the moving characteristics of tracklayer, when the vehicle is on ramp and the ground's vertical pressure is linear, the calculating formulas of relationship between the deviation of the instantaneous steering center, the position of vehicle's gravity, steering radius, moving velocity, moving acceleration, and vehicle's orientation, were obtained by the theory and method of vector analysis in mathematics and mechanics.

摘要根据履带式车辆的运动特点，运用数力学中矢量分析理论和方法，推导了接地比压为线性分布时履带式车辆在斜坡上转向时，瞬时转向中心偏移量与车辆重心位置、转向半径、行进速度、加速度、车辆方位相互关系的计算公式。

The characteristics of the variance of the instantaneous velocity for the incident vehicle were analyzed, and an algorithm of automated incident detection for freeway based on GPS was designed. A series of relative issues were also studied, including choice of sampling intervals, determination of detection thresholds, durative detection time and design of the alarm mechanism, etc. The validity and transplantability of the proposed AID algorithm were tested with field data and simulated data.

通过分析交通事件条件下车辆瞬时速度的变化特征，设计了1种基于GPS的高速公路交通事件自动检测算法，并对采样时间间隔的确定、检测阈值的确定、持续性检测时间的设定与报警机制设计等方法进行了研究，分别利用软件模拟数据和实测模拟数据对算法的有效性与可移植性进行了检验。

Such as: calibrating the laser system, calibrating the measurement region and focusing the CCD camera for the diffuser passage with complex shape, selecting the best incidence angle for the laser sheet,, setting the time parameter including the time between pulses and the time between records, designing the laser system, and selecting water fog with 1～5μm diameter as seedings for PIV measurement after comparing several particles. All of the work is useful to accumulate the PIV measurement experience in turbomachinery. 2. Experimental research of the unsteady flow in diffusers The instantaneous velocity fields within the vaneless and vaned diffuser were measured by using PIV technique.

本文在国内首次进行PIV测量系统对离心风机扩压器内部非定常流动的测量，为此，作者作了必要的实验前期工作：双谐振激光器工作特性的标定；针对扩压器复杂的流道形状，解决了片光源照射区域位置的标定和CCD相机的聚焦等问题；为复杂流道形状的扩压器内部流动的PIV测量选择了最佳片光源入射角度；选择了合适的PIV测量时间参数；为实现非定常内流的PIV测量设计了PIV系统的光路布置；根据非接触测量示踪粒子的选取原则，对几种示踪粒子进行了筛选，最终1～5μm的水雾粒子在本文实验条件下获得最佳效果。

Hot wire anenometry is used to measure the instantaneous velocity, and the measured data are filtered and transformed by fast Fourier transform method to get the frequency of precessing vortex core.

对于旋流设备中产生的旋进涡核现象，可以利用恒温式热线风速仪测量气流瞬时速度，对速度信号进行滤波和FFT变换，从而得到PVC的频谱特性。

And the output of the sensor is less dependent on the flow regime. 7. The helical phase concentration sensor designed has been used in the coal puffing system of the 3# blast furnace in Bao Gang to measure in-situ the coal concentration of the main pipe. Combined with the capacitance velocity sensor, the instantaneous mass flowrate of the pneumatic conveying coal is obtained.

在实验室条件下对螺旋形状表面板电容式相浓度传感器的理论优化结构进行了实验验证，对边保护极板提高检测场中心区域灵敏度的作用也进行了实验验证，静态实验结果与理论计算结果相符，传感器检测场的均匀性误差为4.18%，输出线性度好，对流型变化不敏感。

We are forbidden from giving money to these shoeless, skinny children, as this will perpetuate begging.

向光着脚，骨瘦如柴的孩子施舍是不可以的，因为要招来无休无止的乞讨。

It would be hard not to fall victim to some sharpeyed policeman.

要想不被某个目光锐利的警察抓到，谈何容易。