基于“优先占有”理论的舆论演化模型  

Opinion dynamics model based on the theory of initiative occupancy

作　　者：熊莲花[1,2] 李玲菲 王莉 XIONG Lianhua;LI Lingfei;WANG Li(School of Mathematics,Hefei University of Technology,Hefei 230009,China;School of Management,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学数学学院,安徽合肥230009 [2]合肥工业大学管理学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2018年第4期557-563,共7页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(71371062;61572167)

摘　　要：由于知识背景、性格特质、自身利益等不同,群体中的个体对某些突发性事件的初始观点或态度会有显著的差异性,该差异性会直接影响到个体之间交流的意愿和观点更新时的速度。文章针对初始观点对舆论演化过程的影响,在Weisbuch-Deffuant有界信任模型的基础上提出了初始观点的影响函数,并进行计算机仿真实验。研究结果表明,当初始观点的影响因子0<γ<1时,舆论演化的收敛速度显著变慢,两侧观点值附近的人群比例增大,观点簇的数量和最大簇的比例均有大幅度的变化,表明群体内的观点分散,不利于共识的达成。模型结果能在一定程度上反映和解释现实生活中的"先入为主"现象。Individuals in the group have significant difference in initial opinion or attitude towards some problems due to the distinction of their background knowledge,personality traits and own interests,etc.,which will directly affect their communication intentions and views update speed.In this paper,a new bounded confidence model with the theory of“first impressions are most lasting”is established under the Weibuch-Deffuant model to deal with the effects of initial views on opinion evolution.Some computer simulations are given to demonstrate that when the impact factor of initial viewsγis between 0 and 1,the convergence rate of opinion dynamics significantly slows down and the proportion of population on both sides increases.Furthermore,the amount of opinion clusters and the ratio of maximum cluster change substantially,which shows that the group points are scattered and unfavorable to reach consensus.The results can reflect and explain the phenomenon of the“first impressions are most lasting”to some extent.

关 键 词：观点演化 有界信任 影响因子 收敛速度 

分 类 号：O414.21[理学—理论物理]