摘要
城市网络链接是考察区域空间组织的重要途径,基于高级生产性服务业(APS)的城市网络算法分析更是国际上该领域方法论研究的热点。本文以区域空间和企业层级为视角,在新近出现的分区核心算法的基础上提出了在全计算过程中对单一公司进行网络分析的改进方法,实现了网络分析中地理和层级的特征表达,同时规避了原算法中公司—城市的二模网络数据合并为城市—城市的一模网络数据所导致的信息损失,并以此实现了社会网络统计工具在这一算法的拓展应用。实证研究中,运用该算法对中国两大典型城市区域——长三角、珠三角的25个城市进行了网络检验,结果表明:与连锁模型算法相比,改进后的分区核心算法不但呈现出明显的层级特征和地理空间特征,并且邻近性、中间性、出度、入度等统计量得以运用,拓宽了生产性服务业城市网络的研究视野;另一方面,也发现,由于理论模型假说的演绎分析决定了城市网络的实际形态,因此,后续的生产性服务业城市网络研究的一个创新途径即在于多类型城市流的实证归纳。
A network perspective has increasingly become an organizing paradigm for understanding regional spatial structure. This paper begins with a critical overview of existing empirical models for estimating intercity networks based on corporate linkages. Extending a recently proposed primary linkage algorithm by Hennemann and Derudder, this paper advances a new method for approximating urban network with locational strategies of firms. The new method considers both regional and hierarchical network features, and avoids information loss that is typical for the conversion between two-mode intercity corporate networks and one-mode intercity networks. In addition, networks estimated by the new method are suitable to be used with social network analytics. The newly proposed method is empirically validated with intercity corporate networks formed by advanced producer service （APS） firms in China＇s two largest metropolitan regions： Yangtze River Delta （YRD） and Pearl River Delta （PRD）. The empirical analysis suggests that （1） in contrast with conventional methods （e.g., the interlocking city network model）, our new method would produce regional and hierarchical urban networks that more closely resemble the reality; and （2） the new method allows the effective use of social network analytics such as betweenness and closeness centralities. Nevertheless, the authors note that the validity of any approximation methods for urban networks depends on the soundness of underlying assumptions about how network actors （firms, in our case） interact with each other.
出处
《地理学报》
EI
CSCD
北大核心
2014年第2期169-183,共15页
Acta Geographica Sinica
基金
国家自然科学基金项目(51108184)
亚热带建筑科学国家重点实验室开放课题(2013KB20)
中央高校基本科研业务费专项资金项目(2013ZZ0022)~~
关键词
城市网络
算法
生产性服务业
长三角
珠三角
城市区域
city network
network measurement
advanced producer service
Yangtze RiverDelta
Pearl River Delta
