For low frequencies, electromagnetic shielding and scattering of multiple cylindrical shells can be calculated through Gaussian elimination of the Helmholtz equations for the fields and the boundary conditions at each interface. Numerical stability at higher frequencies is improved by constructing the equations differently: By multiplying the matrix found through the boundary equations at each interface.

中文翻译：

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多圆柱壳低频电磁屏蔽与散射的矩阵乘法方法

对于低频，可以通过对场的亥姆霍兹方程和每个界面的边界条件进行高斯消元来计算多个圆柱壳的电磁屏蔽和散射。通过以不同方式构建方程，可以提高更高频率下的数值稳定性：通过将通过每个界面的边界方程找到的矩阵相乘。