arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2303.07563cs.SImath.DSmath.PRnlin.AOphysics.soc-ph
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具有自适应置信区间的观点动力学有界置信模型

Bounded-Confidence Models of Opinion Dynamics with Adaptive Confidence Bounds

Grace J. Li, Jiajie Luo, Mason A. Porter

AI总结:

本文提出了两种具有异构和自适应置信区间的离散时间观点动力学有界置信模型(推广了HK和DW模型),发现自适应机制导致更少的主要观点集群、更长的收敛时间,并产生基线模型中不存在的相邻节点同观点但不接受的定性现象。

摘要:

人们的观点随着彼此间的互动而随时间改变。在观点动力学的有界置信模型(BCM)中,个体(由网络的节点表示)持有连续值的观点,并受观点与其足够相似(即处于置信区间内)的相邻节点影响。在本文中,我们构建并分析了具有异构和自适应置信区间的离散时间 BCM。我们引入了两个新模型:(1) 推广 Hegselmann--Krause (HK) 模型的同步观点更新 BCM,以及 (2) 推广 Deffuant--Weisbuch (DW) 模型的异步观点更新 BCM。我们在解析和数值上探索了自适应 BCM 的极限行为,包括置信区间动力学、具有相似观点的节点集群的形成,以及“有效图”的时间演化(有效图是网络的一个随时间变化的子图,其边位于当前彼此可接受的节点之间)。对于多种网络以及控制置信区间增减的广泛参数取值,我们通过数值演示表明,与基线(即非自适应)BCM 相比,我们的自适应 BCM 产生的主要观点集群更少,收敛时间更长。我们还表明,我们的自适应 BCM 可能存在收敛到相同观点但彼此不接受的相邻节点。这种定性行为不会出现在相关的基线 BCM 中。

英文摘要:

People's opinions change with time as they interact with each other. In a bounded-confidence model (BCM) of opinion dynamics, individuals (which are represented by the nodes of a network) have continuous-valued opinions and are influenced by neighboring nodes whose opinions are sufficiently similar to theirs (i.e., are within a confidence bound). In this paper, we formulate and analyze discrete-time BCMs with heterogeneous and adaptive confidence bounds. We introduce two new models: (1) a BCM with synchronous opinion updates that generalizes the Hegselmann--Krause (HK) model and (2) a BCM with asynchronous opinion updates that generalizes the Deffuant--Weisbuch (DW) model. We analytically and numerically explore our adaptive BCMs' limiting behaviors, including the confidence-bound dynamics, the formation of clusters of nodes with similar opinions, and the time evolution of an "effective graph", which is a time-dependent subgraph of a network with edges between nodes that {are currently receptive to each other.} For a variety of networks and a wide range of values of the parameters that control the increase and decrease of confidence bounds, we demonstrate numerically that our adaptive BCMs result in fewer major opinion clusters and longer convergence times than the baseline (i.e., nonadaptive) BCMs. We also show that our adaptive BCMs can have adjacent nodes that converge to the same opinion but are not {receptive to each other.} This qualitative behavior does not occur in the associated baseline BCMs.

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。

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