Abstract

A coupled network model consisting of bus and subway systems is proposed, and the statistic properties of the three networks: bus, subway and coupled networks of Beijing are studied with the theory of complex network. The result shows that the three networks have typical properties of small-world. We propose three parameters to depict the coupled network, they are: the coupled parameter β the influence parameter S and the node tolerance parameter γ. We use the binary influence model to simulate a feedback process and cascading failure in the coupled network and we obtain the conclusions: (1) The cascading size grows with β; (2) The cascading size grows with S, but it has a critical point; (3) The cascading size grows with the decrease of γ, when γ≤0.3, the cascading failure will extent to the whole network.

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