Curvatures of theoreticalprofile surface, which is a ruled surface, are easy to get.
由于理论廓面是直纹面，其廓面曲率容易求得。
2
The expressions for calculating the theoretical em profile anomalies of several commonly used em systems over a conducting sphere are also developed.
文中还给出了几种常用电磁装置在导电球体上电磁剖面异常理论曲线的计算公式。
3
This paper establishes, from a geometrical-optics point of view, a theoretical formula for calculating the refractive index profile of a preform by forward scattering.