Our calculation shows that, take the HFS model as zeroth order approximation instead, successful many-body calculation on the ground state property of closed shell atoms can also be made.
计算表明，以HFS模型为零级近似，对闭合壳层原子基态亦可成功地进行多体计算。
2
The zeroth order approximation of the solution can be expressed in terms of confluent hypergeometric functions.
解的零级近似可以用汇合超几何函数表示。
3
But when the rotary inertia of the hub is close to that of the beam, the zeroth-order approximation model may lead to wrong result.