Population gravity center and geometric gravity centre have a significant offset, and the trend of deviation from geometric gravity centre is going on.
人口分布重心向东偏离空间几何重心，且有进一步向东偏离的趋势。
In line with the large sample data bias of population mortality in China, we applied the gravity method to model it, together with a reference to the corresponding data in Japan.
本文针对中国人口死亡率抽样数据偏差较大这一特点，运用引力模型思想借鉴日本相应数据建模。
We found that the gravity model improved the modeling method for the future mortality of our country, and provided a more accurate forecast for the future mortality rate of China's population.
研究发现，引力模型改进了我国人口未来死亡率建模的方法，提供了更准确的预测。
The gravity model is used for studying the mortality rate dynamics between two related but different sized population groups.
死亡率引力模型是研究两个相关但暴露数规模不同的人群的动态死亡率模型。
The gravity model is used for studying the mortality rate dynamics between two related but different sized population groups.
死亡率引力模型是研究两个相关但暴露数规模不同的人群的动态死亡率模型。
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