Research on the Characteristics and Development Trend of Population Structure in Jiangxi Province from the 7th National Population Census
Based on the statistical yearbook data of Jiangxi Province from 1994 to 2021,this paper studies the characteristics and changes of population structure in Jiangxi Province from three aspects:natural structure,social structure and geographical structure,predicts the population structure by BP neural network model and GM gray model,and evaluates the development of population structure by entropy weight method.The results show that:the natural population growth in the province is slo-wing down,the age structure is aging,and there is a phenomenon of low fertility and low mortality in the population structure;the difference between the old and young dependency ratio decreases,the population dependency ratio tends to rise,the population sex ratio tends to balance but is still in an imbalance;the growth rate of urbanization rate slows down,and there are significant differences in the spatial distribution of population;the prediction results of BP neural network model and GM gray model show that the population of Jiangxi Province will enter a slow growth stage.After using the en-tropy weight method to evaluate the population structure,it can be seen that per capita financial ex-penditure on education,per capita GNP,birth rate,and natural population growth rate play an im-portant role in the optimization of the population structure.
population structureBP neural networkgray forecastpopulation forecasting
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