To improve the accuracy of convection weather forecast, one of the key issues is to find out the atmospheric vertical stability and wind shear.

提高对流天气临近预报准确率的关键问题之一是了解大气的垂直稳定度和垂直风切变。

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Theoretical analysis is used to analyze shaft drilling lining's vertical stability problem in floating and dropping phases, its stable equilibrium is proved.

通过理论分析的方法，深入研究了漂浮下沉阶段钻井井壁的竖向稳定性问题，证明了漂浮下沉阶段井壁的稳定平衡性。

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For the crossing section design of the pipe-in-pipe systems, it is necessary to consider the stress-strain initiated by crossing configuration and check the vertical stability of the crossing section.

双层海底管道的跨越设计既需要考虑跨越构形引发的应力应变，也需要充分校核管道跨越段的垂向稳定性。

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For the crossing section design of the pipe-in-pipe systems, it is necessary to consider the stress-strain initiated by crossing configuration and check the vertical stability of the crossing section.

双层海底管道的跨越设计既需要考虑跨越构形引发的应力应变，也需要充分校核管道跨越段的垂向稳定性。

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