采用粒子网格单元与蒙特卡洛碰撞相结合的方法，建立霍尔效应推力器羽流的二维轴对称模型。
A two-dimensional axisymmetric hybrid particle-in-cell and Monte Carlo Collision model is developed to study the Hall effect thruster plume.
建立了取样管与沉积物接触的二维轴对称有限元模型。
A two-dimensional axisymmetric finite element model of sampling tube and sediments is built.
采用二维（轴对称）数学模型，应用流线曲率法求解多级轴流压气机特性。
The multi-stage axial compressor performance was measured using a streamline curvature method based on two-dimension(axisymmetric) mathematical model.
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