Research of Trade Flow of Xinjiang and Central Asian Countries Based on the Model of Gravitations 基于贸易引力模型的中亚与新疆双边贸易流量研究
By the action of the universal gravitations between the sun and the moon, the tide phenomenon occurs on the rocks, sea, lakes and groundwater on the earth, and also on the liquids comprising hydrocarbon-bearing traps. 在月亮和太阳等天体万有引力的作用下,地球上的岩体、海洋、湖泊及地下水都会产生潮汐现象,含油气的流体在含油气圈闭内由于天体的作用也会产生潮汐现象。