A modified boundary element method is proposed. In the approach, the matrices in the formed boundary equation implicitly contain no eigen parameter.
本文提出一种改进边界元法，它使形成的边界元方程不隐含本征量，避免大阶数矩阵的转置。
The generalized eigen analysis is employed to directly and effectively estimate the ellipse parameter vector. The detectability and fitting accuracy are significantly improved.
并通过直接估计椭圆参数的广义本征分析技术，进一步提高椭圆的可检测性和拟合精度。
In this thesis, the AWG's transverse-mode parameter and its eigen equation as well is analyzed based on the periodic waveguide method.
本文提出用周期波导的方法，分析平面阵列波导光栅模式参数及其本征方程。
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