This paper discusses the quantum chemistry ab initio calculation method and some semi-empiricalcalculation methods frequently used on the electronic structure.
对电子结构计算中常用的量子化学从头算方法及几种量子化学半经验计算方法进行了讨论。
2
These equations are very important for engine parameter calculation in missile flight test, The empiricalcalculation equations of main engine parameter and error are derived.
就发动机主要参数及误差的经验计算公式进行了推导和确定。
3
Poulos-Davis-Randolph (PDR) Method is a empiricalcalculation method. It is easy to compute the relation between the number of piles and the average settlement of the foundation.