Understanding Topological and Spatial Attributes of Bus Transportation Networks in Cities of Chongqing and Chengdu

Table 7

Scale-free networks with γ≤ 2.

Network of	n	m
Software packages [32]	1439	1723	1.6/1.4
Email messages [32]	59912	86300	1.5/2.0
Ythan [33]	135	596	1.04
Silwood Park [33]	153	365	1.13
E-mail [34]	56969	84314	1.81
Co-authorship in HEP [35]	56627	9796471	1.2
Restricted Word Web [36]	478773	1.7710^7	1.5

: the number of nodes; m: the number of edges; γ: the power-law exponent.