arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2102.02385physics.soc-phcond-mat.stat-mech
收藏

具有智能代理的Hegselmann-Krause意见模型的临界行为

The critical behavior of Hegselmann-Krause opinion model with smart agents

Yueying Zhu, Jian Jiang, Wei Li

摘要:

Hegselmann-Krause(HK)模型允许人们用有界置信阈值$\varepsilon$来表征主体意见的连续变化。为了考虑智能体的异质性,通过引入一种智能体,研究了同构网络和异构网络上的HK模型。与HK模型中意见更新的平均规则不同,智能主体在更新意见时会考虑环境的影响,因为主体的行为往往与环境的变化相耦合。环境的特点是由一个参数,代表不同集团之间的偏见资源分配。我们专注于底层系统的关键行为。一个相变点分离一个完整的共识,从共存的不同意见,这发生在一个临界值$\varepsilon_c$的有界置信阈值。我们的状态分析,$\varepsilon_c$只能采取两个可能的值之一,这取决于行为的平均度$k_a$的社交图,当代理是同质的特征。结果还表明,相变点弱依赖于网络结构,但与智能体的分数和环境参数密切相关。我们最终建立了有限尺寸标度定律,强调了系统尺寸在潜在的观点动力学中的作用。同时,智能代理的引入并没有改变达成完全共识的时间与系统规模之间的函数依赖关系。然而,对于远离平均场极限的同构网络,它可以更快地达成完全共识。

英文摘要:

The Hegselmann-Krause (HK) model allows one to characterize the continuous change of agents' opinions with the bounded confidence threshold $\varepsilon$. To consider the heterogeneity of agents in characteristics, we study the HK model on homogeneous and heterogeneous networks by introducing a kind of smart agent. Different from the averaging rule in opinion update of HK model, smart agents will consider, in updating their opinions, the environmental influence following the fact that an agent's behavior is often coupled with environmental changes. The environment is characterized by a parameter that represents the biased resource allocation between different cliques. We focus on the critical behavior of the underlying system. A phase transition point separating a complete consensus from the coexistence of different opinions is identified, which occurs at a critical value $\varepsilon_c$ for the bounded confidence threshold. We state analytically that $\varepsilon_c$ can take only one of two possible values, depending on the behavior of the average degree $k_a$ of a social graph, when agents are homogeneous in characteristics. Results also suggest that the phase transition point weakly depends on the network structure but is strongly correlated with the fraction of smart agents and the environmental parameter. We finally establish the finite size scaling law that stresses the role that the system size has in the underlying opinion dynamics. Meanwhile, introducing smart agents does not change the functional dependence between the time to reach a complete consensus and the system size. However, it can drive a complete consensus to be reached faster, for homogeneous networks that are far from the mean field limit.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑