证明人口系统稳定性与妇女临界生育率的一种新方法

A new method to prove populationsystem's stability and critical woman's fertility

在时间年龄座标平面中,人口系统中同龄人群的生命历程可用一个与两座标轴正向成45°夹角的定向矢量函数表示。在此基础上,定义了死亡率、女性比例函数、生育模态归一函数,即可简捷得出妇女临界生育率。最后,以1978年度的妇女临界生育率为基准,分析了近年来我国人口数量的变化趋向。

In a coordinate plane with time-age axes, the life course of the same-aged crowds in population system can be represented as a vector-directional function, whose direction is of 45° angles between two coordinate axes. Based on this, defined the death rate function. the woman-to-people rate function, and the birth-pattern-normalized function. so the critical woman's fertility can be deduced simply. Finally, refering to the 1978's critical woman's fertility as a standart data, we analyse the changed tendency of China's population in resent years.