A six degree of freedom (DOF) nonlinear dynamic model of the airship was presented based on the body axes coordinate system with the origin at the center of the volume.
在以体积中心为原点的机体坐标系中，建立了完整的六自由度非线性模型。
The governing equations were discretized using a finite volume method on a bipolar coordinate system.
在双极坐标系内，利用有限体积法对控制方程离散求解。
The quadrature method of moment (QMOM) for population balance equation (PBE) with volume as the internal coordinate was investigated.
研究以体积为内部属性的群体平衡模型的矩积分求解方法。
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