finite-difference approach中文什么意思

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The details of the construction and characteristics of the new finite - difference scheme are presented in this thesis , by using both the integration theorem and the taylor expansion theory . it is proved that the new approach has the second - order accuracy on the grids with axis - symmetric voronoi cells and at least has the first - order accuracy in general . according to this character of the scheme and the computational requirements of the finite - difference approach , a striping procedure is involved to decompose the velocity model into variable spatial size grids with a nearly constant tune step preserved
本文从积分定理和taylor展开两个角度，详细分析了基于voronoicell的非规则网格有限差分算法的构造过程及性质，并且在理论上证明了本文的差分方法的精度与网格形状的关系：当voronoicell为关于节点的轴对称图形时，本文差分方法具有二阶精度；在一般的网格上，则至少具有一阶精度。

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