Connectivity correlations in three topological spaces of urban bus-transport networks in China |
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Authors: | Chen Yong-Zhou Fu Chun-Hu Chang Hui Li Nan and He Da-Ren |
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Institution: | College of Economics and Management, Nanjing
University of Aeronautics and Astronautics, Nanjing 210016,
China; College of Physics Science and Technology, Yangzhou
University, Yangzhou 225002, China |
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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 $\lan l\ran$. The obtained results
show qualitatively the same connectivity correlations of all the
considered cities under all the three spaces. |
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Keywords: | connectivity correlation bus-transport network universality |
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