摘要
以长三角地区为例,使用4种易于搜集的网络文本数据,基于网络文本中的地名共现估算不同文本类型及不同“距离”参数设定情景下的衰减系数值,并进一步讨论距离衰减在不同空间尺度上的异质性特征,为重力模型相关参数的标定提供依据。结果表明:(1)就空间格局而言,长三角网络呈现出核心城市间廊道效应凸显、“核心-边缘”特征显著、核心城市强带动能力等多个特征。(2)就距离衰减系数而言,网络空间中虚拟要素流的衰减系数总体上小于以人口流动为代表的实体要素流,具有要素类型异质和地理空间异质的双重特征,与地域空间在层级结构、产业分工、近域相似度等方面的真实差异有关,这折射出距离衰减背后复杂的超时空特征。
Taking the Yangtze River Delta region as an example,used four types of web text data to estimate the values of the attenuation coefficients for different parameter settings.And further discussed the heterogeneous characteristics of distance decay at various spatial scales for the purpose of providing a basis for the specification of relevant parameters of the gravity model.The results show that:(1)In terms of spatial pattern,the results of data and centrality calculation show that the Yangtze River Delta network has a number of characteristics such as the prominent corridor effect between core cities,significant core-edge characteristics,and strong driving capacity of core cities.(2)In terms of distance decay coefficients,the decay coefficients of virtual factor flows in text networks are generally smaller than those of physical factor flows represented by population movements.In addition to this,distance decay is characterised by both typological heterogeneity and geospatial heterogeneity,and is associated with differences about cities in terms of hierarchical structure,industrial division of labour and proximal similarity.
作者
盛铭铭
石飞
SHENG Mingming;SHI Fei(School of Architecture and Urban Planning,Nanjing University,Nanjing 210093,China)
出处
《地域研究与开发》
CSSCI
北大核心
2023年第3期60-66,共7页
Areal Research and Development
基金
国家自然科学基金项目(52278065,51778277)。
关键词
重力模型
距离衰减系数
地名共现
空间异质性
长三角地区
gravity model
distance decay coefficient
toponym co-occurrence
spatial heterogeneity
Yangtze River Delta
