本文用球函数展开散射场，结合刚性边界条件导出了刚性目标的重构公式，并利用该公式重构了刚性球和椭球的形状。
By spherical function expansion of the scattered sound field in conjunction with rigid boundary conditions, formulas for reconstructing the shapes of rigid scattering objects are derived.
第3章主要介绍了一种基于扁长椭球波函数的超宽带成形脉冲优化设计算法。
In chapter 3, a novel optimal UWB shaping pulse design algorithm based on prolate spheroidal wave functions is described.
文中简要介绍了焊接过程数值模拟热源的各种加载模式：高斯分布函数、双椭球分布函数、生死单元方法。
The paper briefly introduces several heat source models in numerical simulation of welding processes, including Gaussian distribution, double-ellipsoid distribution and birth-death element.
本文结合椭球域的特点导出了三类椭球域边值问题的准格林函数解。
The development of the ellipsoidal harmonics theory provides means for solving lineared Geodetic Boundary Value Problems(GBVPs) which correspond to an ellipsoid of revolution.
利用拉梅谐和函数理论，证明了共焦椭球成层分布三轴椭球体的外部引力位与均质三轴椭球体的外部引力位具有一致的形式。
The purpose of this paper is to give an analytical expression of a tri axes ellipsoid body's gravitation potential with layered, focus tri axes ellipsoidal density distribution.
给出了完整的椭球形窗口光学系统的设计，设计结果表明，系统的调制传递函数在整个扫描视场范围内接近衍射极限。
A complete design example of elliptical window optical system is demonstrated and the results show that the MTF of optical system approaches the diffraction limit across the entire scanning field.
文中简要介绍了焊接过程数值模拟热源的各种加载模式：高斯分布函数、双椭球分布函数、生死单元方法。
The method of element birth and death was applied to simulate the model of loading welding heat source.
文中简要介绍了焊接过程数值模拟热源的各种加载模式：高斯分布函数、双椭球分布函数、生死单元方法。
The method of element birth and death was applied to simulate the model of loading welding heat source.
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