对局部控水灌溉（无压地下灌溉）技术从理论上进行了分析，并给出了其土壤水分运动方程。

Theoretical analysis of local-control irrigation, i. e. , non-pressure underground irrigation, is conducted, and soil water movement equation is presented.

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考虑层间结构分布质量及楼层处集中质量，在层局部坐标中建立运动微分方程。

In order to take into account the distributed mass along the stories of structure, equation of motion is given in the local coordinates of the story.

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颗粒的运动满足牛顿第二定律，流体相的运动规律由局部平均的纳维斯托克斯方程求解，两相间的耦合由牛顿第三定律决定。

The motion of individual particles is obtained by solving Newtons second law of motion and gas flow by the Navier Stokes equation based on the concept of local average.

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