基于2001~2015年煤炭生产量和消费量的历史数据,构建重心模型研究了中美煤炭生产和消费重心的演变轨迹,并对两国煤炭生产和消费重心的移动距离 、移动速度和经纬坐标变化等演变特征进行了分析.研究发现:在研究期内中美两国的煤炭生产和消费重心整体的移动趋势具有相似性,均呈现西北方向的演变,且空间移动明显,中美煤炭生产重心分别累计移动了421.84 km和264.15 km,消费重心分别累计移动了208.71 km和302.61 km;在移动速度方面,中国煤炭生产重心平均移动速度为30.13 km/a,远快于美国的18.88 km/a,煤炭消费重心的移动情况相反,中国仅14.91 km/a,美国高达21.61 km/a.此外,2014年以来中国煤炭的生产重心移动速度放缓,并且"西进北移"趋势消失.%Based on historical data of coal production and consumption from 2001 to 2015 ,the gravity model was built to study the evolvement track and the spatial variation of China-U .S .coal production and consumption gravity center ,the evolution characteristics of coal production and consumption gravity center in two countries are analyzed by the movement ,velocity and the change of the longitude and latitude coordinate .The study found that the movement track of China-U .S has high similarity in the study period , the overall change track is "northwestward" and the changes are obvious ,their movement distances of production gravity center are accumulative 421 .84 km and 264 .15 km respectively ,the one of consumption gravity center are accumulative 208 .71 km and 302 .61 km respectively .Differences ,the average moving speed of Chinese coal production center (30 .13 km/a) is faster than the United States (18 .88 km/a) ,and the change of coal consumption center is just the contrary ,China is only 14 .91 km/a ,the USA is as high as 21 .61 km/a .In addition ,Chinese coal production center has slowed down and the trend of northwestward has disappeared since 2014 .
展开▼
