利用超声多普勒流速仪（ADV）对反向流动中圆射流流动特性进行了试验。
The flowing characteristics of a round turbulent jet in counter flowing ambientce are studied by using Acoustic Doppler Velocimeter (ADV) measurement techniques.
超声血流仪实现其测量血流速度的关键是多普勒频移信号的提取，多普勒频移信号是血流速度的真实反映。
As Doppler shift signal can significantly reflect the speed of flow, the abstracting of Doppler shift signal is the key of blood flow speed testing in a ultrasonic blood flow detector.
目的探讨不同彩色多普勒超声诊断仪对流速测定的可能影响，以及不同仪器测定流速与实际流速的差异和相关性。
Objective To evaluate the probable effects of different instrumentation in velocity measurements and the correlations between the actual flow velocities and the Doppler flow velocity.
用彩色多普勒超声血流仪检测血管中央的时间-流速，以评估血流量的基线。
The baseline flow was estimated with continuous-wave Doppler by recording the time-velocity at mid-vessel.
利用三维超声学多普勒流速仪对丁坝坝头附近水流和回流区水流的紊动特性进行了系统的观测和分析，得到了丁坝坝头和回流区的水流特性及紊动动能的分布规律。
Then the turbulence characteristics of the spur dike head and backflow region and the distributions law of flow and turbulence kinetic energy around spur dike are obtained in this paper.
利用三维超声波多普勒流速仪(adv)量测有植被时水槽不同测点位置的瞬时流场。
A 3d acoustic Doppler velocimeter (ADV) is used to measure the instantaneous flow fields at different measurement points in a flume covered with vegetation.
利用三维超声波多普勒流速仪(adv)量测有植被时水槽不同测点位置的瞬时流场。
A 3d acoustic Doppler velocimeter (ADV) is used to measure the instantaneous flow fields at different measurement points in a flume covered with vegetation.
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