中文摘要：

本文通过分析影响原子高次谐波发射效率的几个基本元素,定量地得到了如下规律：（1）高次谐波发射效率与复合时刻电子在基态和连续态上的布居乘积成正比;（2）谐波发射效率随复合电子能量的增加而急剧下降.理论解释了上述规律产生的原因.

英文摘要：

By analyzing the factors affecting high-order harmonic generation（HHG） efficiency,we gain quantitatively the regularities as follows：（1） the HHG efficiency is directly proportional to the product of the ground state population and the population of the continuum at the recombination instant;（2） the HHG efficiency drops rapidly with the increase of the recombined electron energy.We explained the underlying mechanism causing the above regularities.