树形广播网络的最佳源点和最佳源点对

The Optimum Source and 2-source of Tree

广播就是通信风格中的某些已知消息的成员（称为源点）将消息传递给其它所有成员的过程．通信网络一般用图来描述．从不同的网络成员广播一条消息所需的最少时间一般是不同的．本文在树网络中设计了选取一个或一对源点使广播时间最短的算法，这样的一个或一对源点称为最佳源点或最佳源点对．

Broadcasting is an information dissemination problem in which information originating at some nodes of a communication network must be transmitted to all other nodes. The communication network is usually modeled as a graph. A node that originally held in information called source. In this paper we give two algorithms to get the optimum source and the optimum 2-source.