spherical-harmonic expansion

At the same time, comparison was made between spherical-harmonic expansion and grid-based ionospheric model.

同时本文基于实测数据对球谐函数模型和网格模型进行了仿真对比分析。

A method for solving axially symmetrical steady magnetic field a solution of the axially symmetrical steady magnetic field by using spherical function expansion

用球函数展开法求解轴对称稳恒磁场

A software program of expansion graphs for spherical face

球面展开图软件程序设计

The problem on the spherical cavity dynamic expansion was studied, through the use of the elliptic-equation yield function, the self-similarity hypothesis and the three region model.

采用椭圆型压力敏感性材料屈服准则和自相似假设，采用三区模型，研究球形孔洞动态扩展问题。

The basic theoretical calculation formulae for radiation and scattering of array antennas are deduced by applying spherical wave function expansion and the scattering matrix to the analysis of array antennas.

将场的矢量球面波函数展开和散射矩阵推广到阵列天线的辐射和散射分析当中，推导出阵列天线辐射和散射的基础理论公式。

By spherical function expansion of the scattered sound field in conjunction with rigid boundary conditions, formulas for reconstructing the shapes of rigid scattering objects are derived.

本文用球函数展开散射场，结合刚性边界条件导出了刚性目标的重构公式，并利用该公式重构了刚性球和椭球的形状。