Both panel method and lifting surface method can be used to calculate the unsteady force.

非定常力可以采用面元法或升力面方法计算得到。

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The improved vortex lattice method is used to predict the ground effect on wake roll-up behind a lifting surface.

用该方法研究了近地升力面尾涡卷起的地面效应。

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A numerical method is presented for prediction of propeller performance and pressure distribution on blade surface according to lifting surface theory.

本文提供了一种根据升力面理论计算螺旋桨桨叶表面压力分布和螺旋桨性能的数值方法。

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What the problems were then finally became clear on Monday, when part of the road surface on both lifting leaves fell off overnight when the bridge was raised.

BBC: Poole's Twin Sails bridge problems 'not acceptable'

Airships demonstrate a law of increasing returns: doubling the length increases the surface area (and hence weight) by a factor of four while the volume (and hence lifting capacity) goes up by a factor of eight.

ECONOMIST: Pushing the envelope