Numerical calculations have been made for wave-guides with a core of rectangular cross-section embedded in a uniform surround of lower refractive index.

对于掩埋在较低折射率的均匀介质中的距形截面芯子的波导曾作过数值计算。

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In this paper the local co-ordinate method was used for calculating the three dimensional distribution of the magnetic field in a cell by bus bar with rectangular cross-section.

本文采用局部坐标法计算矩形截面大电流母线在电解槽中产生的三维磁场。

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In the numerical analysis of axially symmetry electromagnetic field, the finite element method using ring unit with rectangular cross-section has more advantages than other methods.

在具有轴对称特性电磁场的数值分析中，用矩形截面环单元分析具有比其他单元更多的优点。

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