基于百度指数的成渝地区双城经济圈城市网络结构研究

Study of Urban Network Structure in Chengdu-Chongqing Economic Circle Based on Baidu Index

信息化社会下,网络信息相较于传统信息更能准确反映出城市空间网络结构的时空变换.本文基于百度指数数据,借助世界城市网络研究方法,构建城市网络分析模型,分析2013年、2016年和2019年成渝地区双城经济圈城市网络结构现状特征与演化规律.研究结果表明:成渝地区双城经济圈城市网络间联系密切,大城市的集聚效应明显,城市网络的非均衡化程度高;城市网络呈“1+1+3+5+6”等级分布;2013-2019年成渝地区双城经济圈城市网络联系明显加强,双核集聚效应明显;宜宾等低层级城市跃迁,城市层级分布日趋合理;成都是成渝双城经济圈最核心城市,对其他城市影响最大;但重庆在城市网络中的地位增长更快,核心地位日益加强;行政边界对成渝地区双核经济圈网络联系的影响明显,但跨行政区网络联系正在加强;川渝地区的中部地带“塌陷”现象依然明显.

Compared with traditional data,data of information flow can more accurately reflect the space-time transformation of urban spatial network structurein the information society.Based on the Baidu index data,with the help of world urban network research method,this paper constructed an urban network analysis model,and analyzed characteristics and evolution of the urban network structure in Chengdu-Chongqing Economic Circle in 2013,2016 and 2019.The results showed thatthe urban networks in Chengdu-Chongqing Economic Circle were closely related to each other.The agglomeration effect of large cities was obvious.The degree of disequilibrium of urban network was high.The urban network wasdistributed as“1+1+3+5+6”.From 2013 to 2019,the connectionof urban network in dual-city economic circle was obviously strengthened,and the dual-core agglomeration effect is obvious.Yibin and other low-level cities are in transition.The distribution of urban hierarchy is becoming more and more reasonable.Chengdu is the core city of Chengdu-Chongqing regional economic zone with the greatest impact on other cities.However,the significance of Chongqing in the urban network grows faster and its core position is increasingly strengthened.The influence of administrative boundary on the network connection of the dual-core economic circle in Chengdu-Chongqing region is obvious,but the network connection across administrative regions is improving.The central part of Sichuan-Chongqing region is still“collapses”.