基于时空距离的江苏省景区系统聚集分形演化研究

运用聚集分形模型，将近10年分为4个研究时间点，从时空距离探讨江苏全省及其3大区域的高等级景区系统的聚集分形演化特征。结果显示：(1)各区域景区系统均呈聚集态，且苏北和苏中的聚集程度高于苏南与全省；(2)各区域景区系统都在向均匀模式演变；(3)各区域景区系统基于时间距离的空间结构比基于空间距离的结构，更接近于均匀模式；(4)苏北与苏中各区域内景区之间的交通网络水平低于苏南与全省；(5)各区域景区系统基于时间距离的演变，快于本区域基于空间距离的演变速度。研究结论可为江苏景区空间的合理布局提供一定的参考

A STUDY ON EVOLUTION OF AGGREGATION FRACTAL OF SCENIC AREA SYSTEM IN JIANGSU PROVINCE BASED ON SPACE DISTANCE AND TIME DISTANCE

Fractal has become an important method and perspective for researchers to study city structures and other fields. From the perspective of system theory, fractal theory is the best choice to study spatial structures of regional scenic area systems as well. Its of some theoretical significance and practical value to reveal the fractal features of spatial structures of scenic area systems and their control rules. Nowadays, some researches on fractals of spatial structures of scenic area systems have been conducted, however, making a comprehensive view of the existing researches is as follows. (1) The researchers framed the spatial scales within a prefecture level city or an urban area, and provincial areas were the commonly used dimensional types in studying the industrial layout and planning. Yet there is no research on spatial fractals of scenic area systems in provincial areas. (2) The researchers only studied the spatial fractal features of scenic area systems at a certain time point without the contrastive analysis of time series to show the evolution characteristics. (3) In measuring aggregation dimensions and spatial correlation dimensions, the researchers just gave the analysis of spatial distance, instead of that of time distance, while tourists were not only concerned about the spatial distance between scenic areas but also the time distance. By using the aggregation fractal model and dividing the last decade into four temporal phases, this article investigated the characteristics of evolution of aggregation fractal of 4A and 5A scenic area system in Northern Jiangsu, Middle Jiangsu, Southern Jiangsu and the whole Jiangsu province based on synthesized space distance and synthesized time distance. The research results showed that (1) the four scenic area systems all appeared the aggregating distribution, but the aggregation level in Northern Jiangsu and Middle Jiangsu was higher than that in Southern Jiangsu and the whole province; (2) the four scenic area systems were in well distributed pattern evolution, with fastest evolution in the middle, slowest in the south from the perspective of space distance and with fastest evolution in the north, slowest in the south from the perspective of time distance; (3) the spatial structure of each scenic area system based on time distance was closer to the well distributed pattern than that based on space distance; (4) the optimization level of transportation network between the scenic areas in Northern Jiangsu and Middle Jiangsu was lower than that in Southern Jiangsu and the whole province; (5) the evolution speed of each scenic area system based on time distance was faster than that based on spatial distance. The research conclusion can provide some reference for the spatial layout of scenic area systems in Jiangsu Province