Exact solution of a statistical model for laser beam scattering from diffusing surface has been obtained, the comparison with the approximation of center of gravity has been made.
本文对激光束在漫射表面上散射的一类统计模型给出了严格解，并与“质心近似”所得结果作了比较。
2
As the method does not make depletion approximation nor ignores the influence of inversion layer charge on electric potential, it is thus exact.
这种方法既不采用耗尽近似，也不忽略反型电荷对电势的影响，因而它是精确的。
3
There you go. Exact result, and decimal approximation.