当工质在流进和流出控制体界面时，后面的流体推开前面的流体而前进，这样后面的流体对前面的流体必须作推动功。因此，流动功是为了推动流体通过控制体界面而传递的机械功，它是维持流体正常流动所必须传递的能量。
结合以塑性功为硬化参数的椭圆形屈服面，根据相关联流动法则及损伤理论推导出了黄土弹塑性损伤本构模型。
To join ellipse yield function, hardening parameter with plastic work, associated flow law and damage theory, the elastoplastic damage constitutive model of loess were derived.
在ALI犬中，不同的辅助比例对气道压力和呼吸功影响较大，对血流动力学影响较小。
For the ALI dogs, during PAV, different assist ratios had much influence on airway pressure and WOB , and less influence on hemodynamics.
方法应用双功彩超对34条正常动脉的肢体与20条股浅动脉闭塞肢体的股深动脉进行血流动力学研究。
Methods Profunda femoral artery hemodynamics was detected by duplex ultrasonography in 34 normal artery limb and 20 superficial femoral artery occlusive limb.
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