目的：确定正常个体中上下眼睑周围泪河凹面的昼夜变化。

PURPOSE: To determine diurnal variation of tear menisci around upper and lower eyelids in normal subjects.

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用圆柱和放大的叶片做模型，模拟叶片前缘和叶盆凹面的流动。

Cylinder and enlarged blades are used as test models for simulating the leading edge and concave surface of the blade.

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对于冲击面为凹面的冲击射流，远场噪声总声压级对喷嘴位置改变非常敏感。

For a jet impinging onto a concave plate, the OASPL of the far-field noise is quite sensitive to position variations of the nozzle.

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