valve-seating velocity

Doppler echocardiography was used to measure the velocity of left ventricular outflow tract and the velocity across the mitral valve and the regurgitant velocity of the mitral valve. The Clinical Significance of Pulmonary Venous Flow Spectra in Assessment of Left Ventricular Diastolic Disfunction

多普勒超声心动图记录左室流出道血流速度、二尖瓣频谱形态及二尖瓣返流速度。应用肺静脉血流频谱诊断左室舒张功能障碍的临床意义

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Based on the Matlab Simulation Study of Velocity Control by Adjust Flux Thermostatic valve is a new-style self-adjustor of liquid temperature and flux, whose function is to adjust flux of two different liquids when liquids pour into the valve room.

基于Matlab的液压节流调速性能仿真研究温度控制阀（thermostatic valve）是一种新型的自力式流体温度、流量控制调节器。

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The paper establishes a double-loop control model suitable for three-phase electric regulating valve with large capacity, presents the mathematical model of the velocity generator, which takes increment of valve position as input, and the velocity control strategy for fuzzy parameter self-aligning PID.

本文构建了适用于大流量三相电动调节阀的双闭环控制模型，提出了以阀位增量为输入量的速度发生器的数学模型和模糊参数自整定PID的速度控制策略。

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Firstly, MATLAB software is used to do a function resolution on flow area of the anomalous orifice spool valve, and numerical simulation on velocity and pressure distribution in the valve cartridge under different inlet flows and opening are done and the results are analyzed.

首先，对异形阀口滑阀的过流面积进行MATLAB数值解析，对不同流量、阀口开度下阀内的速度场和压力分布等做了数值模拟，并对数值计算或仿真结果做了分析。

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Doppler velocity of atrioventricular valve and semilunar valve in 100 normal fetal hearts were measured by pulsed Doppler echocardiography.

本研究应用脉冲多普勒超声心动图（PDE）检测正常胎儿心脏各瓣口峰值血流速度。

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