Network Structure Entropy and Its Application to Scale-free Networks
网络结构熵及其在非标度网络中的应用

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. The relation between the network structure entropy and the degree distribution is expounded. The network structure entropy of random graph and scale-free network is compared through the example of world trade web. Finally it is indicated that the network structure entropy will be an important tool to research the complex network.