inertia law meaning in Chinese

惯性定律

Hereafter being the forecasting to the old age population coefficient , this text has been applied two kinds of regression model , namely univariate linear model and logarithmic model , and thought over three kinds of economic speed of development ( high , middle , low ) in the logarithmic model to forecast the old age population coefficient respectively . finally , by analyzing the forecasted value and the inertia law of population development , the paper points out the lengthening of the population equally expected life span will push forward the aging of population step by step to the advanced age development ; the development trend of the population aging continues to be clear , and just appears a stage characteristic ; furthermore , the population aging speed in rural area will be faster than in the city
此后是对老年人口系数的预测，本文应用了两种回归模型，即一元线性回归模型和对数拟合模型，并在对数拟合模型中考虑了经济发展速度的高、中、低三种方案，对老年人口系数分别进行预测；最后在分析预测值和人口发展惯性规律基础上对山东省未来人口老龄化发展趋势作了较深入分析，指出人口平均预期寿命的不断延长，将逐步推动人口老龄化向高龄化发展；人口老龄化继续发展趋势明显，且呈现出阶段性特征；农村人口老龄化速度将快于城市。