一个新的信息传播模型及其模拟  

A New Information Diffusion Model and Its Computer Simulation

作　　者：孙庆川[1] 山石[1] 兰田田[1] 

机构地区：[1]上海大学情报学研究中心,上海200444

出　　处：《图书情报工作》2010年第6期52-56,79,共6页Library and Information Service

摘　　要：信息传播过程包含两个因素:一是信息传播的规则,描述人如何接受和传播信息;二是信息传播所在网络的结构。通过构建包含这两个因素的信息传播模型,并在计算机上模拟,得出如下结论:首先,存在信息传播临界值。当信息吸引力大于临界值时信息才能传播开,否则几乎不能传播。其次,小世界网络上,当信息吸引力在临界值附近时,随机边的添加会使传播面积增大,从而导致实际的传播临界值减小;但当信息吸引力足够大时,图结构的变化对信息传播面积影响不大。第三,当信息吸引力在临界值附近时,信息传播耗时对网络规模很敏感,但随着信息吸引力的增加,其值趋于稳定。A new model of information diffusion is constructed. This model is intended to reflect the fact that in the process of information diffusion there are two elements ： the first one is the rule of diffusion. It describe the mechanism that how a person accept the in- formation; the second one is the structure of the network which the information diffuses in. From the simulation of this model on the computer, the authors find that there is a critical value. If and only if the attraction of information is above the critical value, the diffusion can occur. And on the NW smafl-world network, the addition of random edges can increase the area of information diffusion with the attraction around the critical value. But when the attraction is strong enough, this change of networks will not effect the area obviously. Finally, the consuming time of the information diffusion is sensitive to the scale of networks when the information attraction is near the critical value. But along with the increase of the attraction, the consuming time runs to constant.

关 键 词：信息传播模型 计算机模拟 小世界网络 无标度网络 

分 类 号：G201[文化科学—传播学] G206