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Complex networks have been successfully used in many real complex systems since the researches of small-world networks and scale-free networks [1, 2].
Many real complex systems have been well studied which include the actor network [1–3], WWW [2, 4], protein networks , and power grid [1, 3].
In a second phase, space P is used to analyze the property of transfer.
The results show that the average transfer time of Beijing bus network which is 1.88 and 99.8 percent of arbitrary two pair nodes is reachable within 4 transfers.
During the last few years, transport networks, such as subway network , airport network [7–9], and street network , have been studied by the complex approach.
As an important part of urban transport systems and a trip mode to alleviate the traffic congestion, bus network has been studied by an increasingly large number of researchers.
Figure 3 shows the degree distribution of the stations in the BBN, and we found that it follows a shifted power law distribution.
Cluster coefficient is an important property of characterizing the local cohesiveness of the current node or the extent to which the nodes in the network are clustered together.
The results show that the bus network of Beijing is a scale-free network and the degree of more than 99 percent of nodes is lower than 10.
The results also show that the network is an assortative network with 46 communities.