基于分形理论对陕西城市体系等级规模分布研究

Study of the size distribution of cities in Shaanxi province based on the fractal theory

通过测算20年来陕西城市体系等级规模分布的分维值,得出结论:陕西省城市体系规模分布符合分形特征;城市体系规模分布比较分散,人口分布呈不均衡态分布;整个城市体系的分形表现出中间层次的弱缺,存在城市规模等级结构的断层;城市体系等级差异虽有缓慢减小的趋势,但距离最优状态还很漫长。在对这些特征做出解释的基础上,认为应采取促进省内二级中心城市的发展、加快交通等基础设施体系的建设、加强城市体系的产业规划等措施促进城市体系等级规模结构的优化。

Based on the fractal theory, the size distribution of urban system in Shaanxi Province is made thorough a analysis. Conclusions have been drawn by caculating the dimensions of urban system during 20 years in Shaanxi province ：That thc majority of population aggregates in the primate city leads to the primacy - rate too high and in medium - place city arc chasm. This distribution serionsly affects exerting of radiating action of the primate city. Based on this analysis, we put forward that enforcing second - degree city, perfecting traffic and communication system to accelerate exerting of radiating action of the central city and it is an important factor to structure modem urban system of Shannxi province.