The fourth part has mainly used the factorial analysis and the gravitational model 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。

youdao

Based on the principle of social physics, a gravitational model 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。

youdao

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.

一种主流看法认为是重力潮汐作用改变了月球的外壳，并使其向一侧倾斜，但该新理论是以解释月球成因的“大碰撞”模型为基础的。

youdao

Their model takes into account both general relativity and all known gravitational effects of the sun, the moon, the planets and large asteroids.

ECONOMIST: Physics

So do candidates for the particles that make up dark matter, a shadowy substance whose presence can be deduced from its gravitational pull (see article) but which does not interact much via the three Standard-Model forces.

ECONOMIST: The hunt for physics��s most elusive quarry is over