一种基于耦合网络的RD-IHSAT网络谣言传播模型

A model of RD-IHSAT rumor dissemination based on coupling network

为探究谣言在社交网络中的传播规律,基于耦合原理,构建由巴拉巴西-阿尔伯特(Barabási-Albert,BA)无标度网络与瓦茨-斯特罗加茨(Watts-Strogatz,WS)小世界网络组成的沉默者、辟谣者、无知者、犹豫者、传谣者、铁杆传谣者、疲惫者(reticent,debunker,ignorant,hesitated,spreader,adherent,tired,RD-IHSAT)谣言传播模型。该模型在易感者、感染者、移出者(susceptible,infective,removal,SIR)模型的基础上引入兴趣衰弱机制、感知社会共识机制、沉默与反沉默的螺旋等因素,并融入犹豫者、铁杆传谣者、沉默者、辟谣者等角色,使其更加逼近真实情形。仿真结果显示,耦合网络极大地促进了谣言的传播,不仅加快谣言爆发速度,而且扩大谣言传播规模;提高对犹豫者的辟谣概率能够极为显著地抑制谣言规模,是控制谣言传播的最有力因素;仅降低谣言传播率对谣言控制作用较小;提高沉默群体的比例是遏制谣言传播的关键一环;对辟谣时滞的把控极大地影响了辟谣效果。

To explore the spread of rumors in social network,based on the principles of coupling network,the model of RD-IHSAT was established on Barabási-Albert(BA)scale free network and Watts-Strogatz(WS)small world network.The classic model of SIR was optimized,by combining it with three concerns,the interest decay,the social consensus and the spiral of silence effect,and adding four roles,hesitated,adherent,reticent and debunker.Results of numerical simulations are as follows:an information outbreak can be triggered by coupling network,not only the spreading speed but the scale as well;the dissemination can be markedly suppressed when the probability of ru-mor-refuting for the hesitated and spreaders arises;the chances of transition from spreaders to adherents drop;in-creasing the proportion of silent groups is a key part of curbing the spread of rumors;the control of the time lag in refuting rumors will greatly affect the effect of refuting rumors.