说明：  该代码是计算节点介数，分析网络的个体的重要性。简单地讲，一个节点的Betweenness表示所有的节点对之间通过该节点的最短路径条数。Betweenness很好地描述了一个网络中节点可能需要承载的流量。
(The code is node betweenness calculation, analysis of the importance of individual network. Simply put, a node Betweenness said all of the article by the nodes of the shortest path between nodes to count. Betweenness well describes a network node may need to load flow. )