Connectivity correlations in three topological spaces of urban bus-transport networks in China
Chen Yong-Zhou(陈永洲)a), Fu Chun-Hua(付春花)b), Chang Hui(常慧)b), Li Nan(李南)a), and He Da-Ren(何大韧)b)†
a College of Economics and Management, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; b College of Physics Science and Technology, Yangzhou University, Yangzhou 225002, China
Abstract In this paper, an empirical investigation is presented, which focuses on unveiling the universality of connectivity correlations in three spaces (the route space, the stop geographical space and bus-transferring space) of urban bus-transport networks (BTNs) in four major cities of China. The underlying features of the connectivity correlations are shown in two statistical ways. One is the correlation between the (weighted) average degree of all the nearest neighbouring vertices with degree $k$, ($K^w_{nn}(k)$) $K_{nn}(k)$, and $k$, and the other is the correlations between the assortativity coefficient $r$ and, respectively, the network size $N$, the network diameter $D$, the averaged clustering coefficient $C$, and the averaged distance $\langle l\rangle$. The obtained results show qualitatively the same connectivity correlations of all the considered cities under all the three spaces.
Received: 26 February 2008
Revised: 17 March 2008
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of China (Grant Nos 70671089 and
10635040) and the foundation of XM06-142.
Cite this article:
Chen Yong-Zhou(陈永洲), Fu Chun-Hua(付春花), Chang Hui(常慧), Li Nan(李南), and He Da-Ren(何大韧) Connectivity correlations in three topological spaces of urban bus-transport networks in China 2008 Chin. Phys. B 17 3580
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