针对舰船目标尺寸巨大、形状复杂、电磁设备繁多的特点，选取并行多层快速多极子技术来模拟仿真其电磁环境。

Electromagnetic environment of ship, an extremely large complex target with various electromagnetic equipments, was simulated by parallel multi-level fast multipole algorithm (MLFMA).

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本文结合平面边界元法和平面多极子展开法，求解平面分层埋入体的电磁散射。

Multiple expansion for the buried body in the stratified Media attd Boundary Element Method (BEM) are combined to obtain electromagnetic scattering field of buried body in the stratified Media.

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均衡混合场积分方程与多层快速多极子方法(MLFMA)结合使用，可以方便地求解含腔导体目标的电磁散射。

Combination of ECFIE with multilevel fast multipole algorithm (MLFMA) can easily solve electromagnetic scattering from conductive target with open cavity.

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