群落网络中信息传播规律的研究

摘要

【目的】介于具有群落结构的复杂网络上信息传播的现实意义，本文对其传播规律进行了研究。【方法】通过随机交叉换边的方法调节群落网络的模块化强度，计算在不同的外部边数量下传播源所在群落、任意群落和网络整体的传播特性。【结果】对网络整体而言传播范围先变大后变小，最大值对应于集聚系数和外部边数量之间竞争的平衡点；增加传播源的数量会使得最优传播范围对应的外部边数量增加；就单次传播来说非传播源所在的群落的传播范围可能大于、小于、或大或小于传播源所在的群落。【结论】在群落网络中，信息的传播情况非常复杂，若要深入研究信息在群落网络上的传播行为，应具体问题具体分析。%Objective]Because of the unique characters of information spreading in community networks,the spreading properties in such networks are studied in detail.[Methods]Using ran-dom exchange link method,the modularity of community networks is regulated,and the sprea-ding range in seed community,non-seed community and the whole network is calculated.[Re-sults]The spreading range of the whole networks is optimal at some inter-community links number:Increasing the number will decrease the clustering coefficient,which results in smaller spreading range;and decreasing the number will worsen the information spreading between dif-ferent communities,which will also decrease the spreading range.Increasing the spreading seeds number will enlarge spreading range and also make the optimal spreading range corre-spond with more inter-community links.For one-time spreading,the spreading range in non-seed communities may be larger,smaller,or larger or smaller than in seed community.[Conclu-sion]In community networks,the information spreading properties are very complex,and it’s necessary to study the concrete information spreading issue with concrete method.