斜入射下介质柱二维电磁散射 问题的一种数值分析方法

采用矩量法,共轭梯度法和快速傅里叶变换的混合方法来分析任意形状截面的非均匀各向异性的介质柱在斜入射条件下的二维电磁散射.在这个方案中,采用关于总电场的微-积分方程,借助于包含介质柱的一个矩形来产生离散网格,而离散量的线性方程组仍然建立在原介质柱截面区域上.这样既不会扩大原问题的规模,又可以有效地利用共轭梯度法与快速傅里叶变换的结合算法CG-FFT来求解.文中给出了数值算例,证实了该方案的有效性.

Harmonic Retrieval and Nonlinear Frequency-Coupled Harmonics in the Complex Noise

In this paper,the harmonic retrieval and frequency coupled harmonics are studied under the condition that the complex noise include multiplicative and additive noise are correlative.First,the concept of cross mixing is proposed.Second,the result on the frequency coupled harmonics are extended.Third,the harmonic retrieval in the complex noise is solved with the slice of the sixth order time averaged moment polyspectral.The above algorithms are confirmed by the simulations.