The fourth part has mainly used the factorial analysis and the gravitationalmodel to limit the city fringe area of ShiJiaZhuang.
第四部分主要是利用因子分析和引力模型对于石家庄市城市边缘区的界定。
2
Based on the principle of social physics, a gravitationalmodel of industrial economic co-ordination region of Jiangsu Province is presented in this paper.
本文运用社会物理学的基本原理,提出了工业经济区划的吸力模型。并将该模型应用于江苏省工业经济区划。
3
One leading idea is that gravitational tidal forces reshaped the moon's crust and made it lopsided. But the new theory builds on the "giant impact" model that explains the moon's creation.