The Evolution Characteristics of City Size Distribution of Urban Agglomeration Around Poyang Lake
研究了环鄱阳湖城市群城市规模分布的演化特征，发现首位城市作用显著、中等城市断层、中小城市发展水平低，整体城市化水平高但结构转型困难，规模分布符合Zipf定律。
Firstly,the study has analyzed the evolution characteristics and law of the city size distribution of urban agglomeration around Poyang Lake by a structure analysis and nonparametric test.On the one hand,the result shows that the primary city plays an important role in a size distribution,and middle-size cities appear a serious fault phenomenon,and a number of small and medium-sized cities are at a relatively low developing level with an under-developing regional economic level.One the other hand,the result shows that the overall urbanization level is high because the changing speed is rapid from the small and medium-sized cities promoting to the bigger cities,and the gap between the primary city and other cities is decreasing recently,but in a short-term the structural transition in the urban agglomeration is difficult for that the primary city will still prevail for a long time.In addition,the city size distribution abide by an ideal Zipf,s law with a more obvious fractal characteristics,and it can be fitted by a double Pareto curve whenβ1 because the proportion of every size-cities is reasonable with a normal fulfillment of different rank of cities.