作　　者： ; ; ; ; ;

机构地区： 中国地质大学北京土地科学技术学院

出　　处： 《地理科学进展》 2009年第6期944-951,共8页

摘　　要： 点—轴系统是我国区域城镇空间结构的主要模式之一。探索城镇点—轴系统空间结构,进而揭示其数理本质,是进行地理空间优化的理论基础。文章从分形理论出发,构建点—轴系统分形模型,明确该模型的地理意义,以此刻画点—轴系统的空间结构。利用GIS软件开发了点—轴系统分形模型计算工具。以济南市城镇—交通系统为例,在GIS数据环境下计算其分形模型参数,研究结果发现:①区域点—轴系统发育到一定阶段的确呈现分形性质,点—轴系统分形模型可以有效地反映点—轴系统空间结构形态;②无标度性、分形、有序性是地理空间的不同状态,推论得出随着点—轴系统的发展,其空间结构也经历着无序→无标度网络→分形结构→有序→更为复杂的无序的演进过程;③济南市城镇—交通系统已经形成点—轴系统的雏形,城镇点—轴系统处于发展阶段。 Pole-axis system is one of the main modes of Chinese regional spatial structure. It is an academic element for geographical space optimization to research urban pole-axis system spatial structure and reveal its mathematics nature. Based on pole-axis system theory, a fractal model of pole-axis system was built, and then its geographical meaning was illuminated. According to the mathematic elements of pole-axis system fraetal model, this paper developed counting program of fractal model by GIS software. Taking urban-traffic system in Jinan City, Shandong Province as an example, this paper counted the parameter of its fractal model by using GIS data format. The results showed that： （1） The pole-axis system presented a fractal nature indeed when developing to a certain stage, and the fractal model of pole-axis system can effectively reflect the spatial structure of pole-axis system. （2） Fractal, scale-free and order is the different states of geo-spatial. We deduced that its spatial structure has experienced an iterative process of disorder → scale-free→ fractal→order→ a more complex disorder with the development of pole-axis system. （3） The urban-traffic system in Jinan City, Shandong Province had shaped the rudimental structure of pole-axis system, which was in the developing stage.

关 键 词： 区域城镇体系 点 轴系统理论 点 轴系统分形模型 空间结构 分维 济南市

领　　域： [理学] [理学] [建筑科学]