详细推导了快速多极子方法结合迭代物理光学法和阻抗边界条件的混合计算公式。
The forward-backward methodology is combined with the fast multipole method(FMM) and the iterative physical optics(IPO) to improve convergence and computational efficiency.
最后，在上述研究基础上，针对高效求解复杂目标电磁散射的问题研究了复杂度分别为和的快速多极子方法以及多层快速多极子方法。
Following, based on the above research foundation and aimed at resolving the scattering by the complex target with high efficient solution, extensive study of the FMM and MLFMA has been carried out.
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