Then we introduce the basics of the theory of frames, which intuitively correspond to over complete, non-orthogonal systems of basis functions.
然后我们将完整的介绍架构理论的基础，亦即直观符合非正交系统的基本功能。
2
Thus, the concept of reflection matrix is proposed and the mirror symmetry of spectral analysis for nonorthogonal function is revealed.
本文提出了反射阵的概念，揭示了非正交函数谱分析的镜像对称性。
3
A finite difference method in nonorthogonal curvilinear coordinate is used for the simulation of two dimensional electrostatic field. The computational formula is derived.