The effects of velocity ratio of free streams on the particle sedimentation in liquid-solid two phase plane mixing layer are studied by flow visualization method.
本文采用流动显示的方法对平板混合层中上下层流体速度比对固体颗粒在混合层中沉降的影响进行了研究。
ObjectiveTo evaluate the efficiency of heparin on the ratio of peak systolic to least diastolic flow velocity (S/D) of umbilical artery flow velocity waveforms at second-trimester pregnancies.
目的评价肝素对改善妊娠中晚期脐动脉收缩期最大血流速度（S）与舒张末期血流速度（D）的比值异常的临床效果。
The expansion ratio is related to the liquid flow rate, fluidization velocity and free descending velocity of the packing material.
填料膨胀率的大小与液体流量、填料的流化速度及自由沉降速度有关。
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