很多现实的复杂网络都具有无标度特性,其节点度具有幂律分布的规律。主要讨论幂指数γ〈2的无标度网络的性质,指出当γ〈2时,网络中最小度的节点数以及网络的平均度都与网络大小N有某种数量关系。通过与γ≥2的无标度网络对比,该类特殊网络呈现出不同的性质和行为,网络的边与节点相比呈现快速增长,具有更大的平均度,网络中有更多的边,网络不再稀疏。
Many complex networks exhibit a scale-free property, with power-law vertex degree. This common feature consequents from the two generic mechanisms relating to the formation of real networks:expansion and preferential attachment. In this paper we mainly discussed the properties of scale-free networks with the exponent γ〈2. We showed that when γ〈2,the number of min-degree vertices and the average degree had some quantitative relationship with the network size N. Compared with scale-free networks with , we found that these special type of networks exhibited different properties and behaviors.