Wind field retrieval from dual-Doppler radar data USES synthesis technique, and the vertical velocity is obtained by using continuity equation, then the three-dimensional wind fields are retrieved.

双多普勒天气雷达反演风场是以直接合成法为基础，垂直速度通过连续方程得到，反演天气系统的三维风场。

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Stochastic sand trajectories in wind-blown sand were obtained by solving the differential equation which describes the vertical fluctuating velocity of sand grains.

通过对描述沙粒垂向运动速度脉动分量的随机微分方程的直接求解，获得了风沙流中沙粒运动的随机轨迹。

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In the power equation velocity of the wind is having cubic relation.

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