论文部分内容阅读
为探讨鄱阳湖生态经济区城市体系空间结构特征,利用分形模型,分别测算了鄱阳湖生态经济区城市体系的集聚维、网格维和关联维。研究表明:(1)南昌市和九江市在鄱阳湖生态经济区城市体系自组织演化过程中核心作用明显(集聚维数分别为1.042 5和1.151 6),前人认为该区域城市体系具有双核结构特征,集聚维数的测算从城市自组织演化角度印证了该论点;(2)研究区城市体系在空间上以线(如公路、铁路)为轴线展布(容量维(1.035 6)、信息维(1.07)、关联维D→1),区域内各主要城市之间通达性良好(牛鸦维数比Q=0.941 6);(3)区域内城市体系系统演化动力比较单一(D1≈D0),自组织演化过程中明显受到鄱阳湖平原水陆生态系统的驱动。
In order to explore the spatial structure of urban system in Poyang Lake Ecological Economic Zone, the clustering dimension, grid dimension and correlation dimension of urban system in Poyang Lake Ecological Economic Zone were calculated respectively by using the fractal model. The results show that: (1) Nanchang and Jiujiang have obvious core functions in the self-organization evolution of Poyang Lake Ecological Economic Zone (the aggregated dimensions are 1.042 5 and 1.151 6 respectively). The former thought that the urban system in this region had a dual-core structure (2) The urban system in the study area is spatially distributed with lines (such as highway and railway) as the axis (capacity dimension (1.035 6), information dimension (1.07), the correlation dimension D → 1), and the accessibility of the major cities in the region is good (the ratio of the yak crows is Q = 0.941 6); (3) The evolutionary dynamics of the urban system in the region is relatively single (D1≈D0) , Evidently driven by the plains and terrestrial ecosystems of Poyang Lake Plain in the process of self-organization evolution.