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中文摘要：
区域发展差距一直是中国区域协调发展所面临的重要问题，经济和人口的空间分布态势作为区域发展空间均衡过程的体现，与区域差距的形成有密切关联。通过计算1952年至2005年中国经济重心和人口重心的地理坐标以及重心间的空间重叠性与变动一致性，刻画了53年间我国经济和人口空间分布的耦合态势，证明了其与区域差距的大小高度相关。在构建经济、人口重心空间耦合过程的作用机制模型的基础上，用均衡点跃迁和势能差转化解释了区域发展的空间均衡过程，揭示了内生和外部因素在其中的作用机制，提出了区域发展差距的“多阶段倒U形”的演变规律，并据此分析了1952年以来中国区域发展空间均衡过程周期性变化的动因，并对促进区域协调发展的途径进行了讨论。
英文摘要：
Regional gap is an important problem that the regional development of China is facing. The distribution of economy and population, as an embodiment of the spatial equilibrium process of regional development, has a close relation with the state of regional gap. Using gravity models, it works out the center of economic gravity and population gravity （abbr. CEG and CPG）, illustrates the coupling process by measuring the overlapping of two centers of gravity and the consistency of their movement, and proves that the coupling process has a high correlation with the evolution of regional gap. Then, a model of the coupling mechanism of CEG and CPG is built. Based on the model, it illustrates the spatial equilibrium process of regional development by the transition of equilibrium location and the conversion of regional potential energy difference, and reveals how the internal and external factors affect the process. Therefore, the authors advance a ＂multistage inverted-U-curve evolution law＂ of regional gap. Finally, it analyses the mechanism of the periodic variation of regional gap in China since 1952, and brings up a discussion of the path to coordinating the regional development of China.
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