The level set method was adopted to describing the structural topology and its change, and the compactly supported radial basis function was introduced to getting the parametric level set method.

采用水平集方法描述结构的拓扑及其变化，使用紧支径向基函数对计算区域的水平集进行插值以得到参数化的水平集方法。

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The Level Set method is adopted to capture the gas-liquid interface and the projection method is used to solve the three dimensional two-phase flow equations.

采用水平集方法捕捉气，液两相界面，结合投影方法，对所建立的两相流动模型进行了三维数值求解。

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The partition of unity method (PUM) and Level Set Method (LSM) are briefly introduced in sections 2 and 3, respectively.

第2和第3节分别简要介绍单位分解法和水平集法；

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