中文摘要：

采用1995-2012年城市人口数据,运用城市首位度、位序-规模法则、城市基尼系数、核密度估计和马尔可夫状态空间转移矩阵等研究方法对京津冀城市群城市规模特征与规律进行深入分析。结果显示：京津冀城市群首位城市作用较强,呈现＂双核心＂辐射作用;高位序城市规模集聚明显,首位城市与中小城市规模差距大,城市体系不均衡;人口规模处于弱集中状态,经济规模处于强集中状态,经济发展不协调;超大城市和特大城市的持续性较强,城市规模转型较难;首位型城市规模分布趋势逐步减弱,城市规模分布向合理态势转变。因此,现阶段应提高京津冀城市群发展质量,提升城市群综合竞争力。

英文摘要：

The data of urban population from 1995 to 2012 for each city in Beijing- Tianjin- Hebei urban agglomeration were collected to analyze the characteristics and law of the city size distribution of Beijing- Tianjin-Hebei urban agglomeration by the methods of city＇s first degrees,rank- size rule,city Gini coefficient,kernel density estimation and transfer matrix of Markov state space. The results showed that the first city function was stronger and ＂ Dual core＂ radiation effect was significant; the urban size of high order had obvious characteristics of gathering,the urban size had a larger gap between first cities and small,and medium- sized cities was larger and the urban system was not balanced; the population size was in weak centralized state,the size of the economy was in the strong centralized state and the economic development was not harmonious; the continuity of the super big city and the megalopolis sustainable was stronger,and the transformation of urban scale was more difficult; the trend of urban size distribution of first type gradually weakened,urban size distribution will be transformed into reasonable situation. Therefore,at this stage the development quality of Beijing- Tianjin- Hebei urban agglomeration should be improved,and comprehensive competitiveness of urban agglomeration be enhanced.