Through solving the blood flow equations for local vessel expansion region, the analytical expressions of blood flow velocity, pressure and wall shear stress were then obtained.

接着，通过求解局部扩张血管段内的血液流动方程，导得血液流速、压力和血管壁切应力的分析表达式。

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The SPRD will automatically open as the air pressure in the duct system increases, in order to prevent the reduction of air flow and excessive noise and velocity through the duct system.

当管道系统空气压力增加时，SPRD会自动开启，以防止管道系统中空气流动的减少和过度噪音和速度。

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The respective resistance properties for branch pipe were investigated through experiments and GRNN neural network when both conveying velocity and the flow valve opening of branch pipe were changed.

通过试验和GRNN神经网络对输送表观气速和两分支管路流量控制阀开度发生变化时，各分支管路中的阻力特性进行了研究。

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