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GIS based analysis on the population migration of main nationalities in Gansu province since the founding of China

机译：基于GIS自中国成立以来甘肃省主要民族人口迁移分析

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This paper sets up 5 Census database in 1953,1964,1983,1990,2000 based on GIS. The population gravity centers of main nationalities were calculated using gravity model in 1953, 1964,1983,1990,2000. Then, the characteristics and the influence factors of the moving of the minority population are analyzed. Study results show that population gravity center move to capitals are obvious. The move velocities of minorities' population gravity centers are slowdown, while the move velocities of HAN is Accelerated. Movement distances of east-west direction are generally greater than that of the north - south direction. The population gravity center are continued moving to southeast all the while. Finally, the factors of Natural conditions, Economic development, Policies .as the mainly reasons were discussed.
机译：本文以GIS为1953,1964,1983,1990,2000创造了5个人口普查数据库。主要民族的人口重力中心是在1953年的引力模型计算的，1964,1983,1990,2000计算。然后，分析了少数群体移动的特征和影响因素。研究结果表明，人口重力中心搬到首都显而易见的。少数群体人口重力中心的移动速度是放缓的，而汉族的移动速度加速。东西方向的运动距离通常大于南北方向的距离。人口重力中心一直持续到东南。最后，自然条件，经济发展，政策的因素。讨论了主要原因。

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