To characterize the scale-free feature of complex network quantificationally, the concepts of node-importance, network structure entropy and standard network structure entropy are proposed.

• 为了定量地刻画复杂网络的非标度性,提出了节点重要度、网络结构熵、标准网络结构熵的概念,阐述了网络结构熵与连接度分布的关系。