摘要
哈大高铁的运行缩短了东北城市群之间的相对距离,优化了东北城市群城市交通网络空间结构。通过建立向心性分形模型以及相关性分形模型,以交通距离代替空间的实际距离来研究城市群之间分形特征,通过城市间高速铁路时间距离和高速公路时间距离进行对比,计算高铁开通前后东北城市群交通空间聚集维数和空间关联维数,分析东北城市群交通网络空间结构分形特征变化。通过计算发现:以沈阳为中心时,东北城市群的空间密度由中心向外围的变化较为均匀;高速铁路时代下的东北城市群交通网络空间向心性集聚分布更加显著,空间的关联性更强。
The operation of Harbin-Dalian High Speed Railway shortens the relative distance in the northeast urban agglomeration and optimizes the spatial structure of urban traffic network in the northeast urban agglomeration.The centration fractal model and correlation fractal model are established,through which the actual spatial distance is replaced with traffic distance to study the fractal characteristics in the urban agglomeration.The time distance between cities of intercity high speed railways and that of expressways is compared,through which the spatial aggregation dimension and spatial correlation dimension of the traffic in the northeast urban agglomeration before and after when the high speed railway is put into operation are calculated,and the change of fractal characteristics on spatial structure of traffic network in the northeast urban agglomeration is analyzed.Through calculation,it is found that when Shenyang is taken as the center,the spatial density of the northeast urban agglomeration changes uniformly from center to periphery;in the era of the high speed railway,the spatial centripetal and aggregated distribution of traffic network in the northeast urban agglomeration is more significant,and the spatial correlation is stronger.
作者
金锋
JIN Feng(Teaching Material Publishing Centre,China Railway Publishing House Co Ltd,Beijing 100054,China)
出处
《中国铁路》
2021年第2期95-100,共6页
China Railway
关键词
哈大高铁
铁路运输
空间结构
分形特征
交通网络
交通地理
Harbin-Dalian HSR
railway transport
spatial structure
fractal characteristics
traffic network
traffic geography
