In addition, the ray effect in the spherical harmonicsapproximation mitigates with increasing optical thickness within gray medium.
同时，球谐函数法的射线效应随光学厚度的增加而减小。
2
This paper presents the fold line approximation method of discrete Fourier Series, and conducts calculation formula of harmonics.
提出了计算离散傅氏级数的折线逼近法，并导出了其幅值计算式。
3
In this example, a finite sum of harmonics for approximation of a ramp function is demonstrated graphically for the parameter variation of number of total harmonics.