目的：探讨牙龈血流量(GBF)、血流速度(BCV)和血浓度(BC)与牙周病的关系。

Objective: To study the relation between gingival blood flow (GBF), blood current velocity (BCV), blood concentration (BC) in gingival and periodontal diseases.

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同时，对风扇流场的压力和速度进行分析；研究了风扇流量、风扇转速、扇叶数和气动噪声相互之间的关系。

In addition, the pressure and velocity in cooling fan flow field are analyzed and the relations between flow rate, rotation speed, blade number and aerodynamic noise of cooling fan are studied.

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讨论了曲率和挠度对二次流动、流函数等值线和轴向速度的影响，研究了不同曲率和挠度螺旋管道内流量与压力梯度之间的关系。

The effects of curvature and torsion on secondary flow, isoline of stream function and distribution of the axial velocity of flow were discussed.

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