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arXiv 2311.13675physics.soc-ph
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具有老化效应的含噪声动力学交换意见模型

Noisy kinetic-exchange opinion model with aging

Allan R. Vieira, Jaume Llabrés, Raúl Toral, Celia Anteneodo

AI总结:

本文研究了具有老化效应的含噪声动力学意见模型,发现弱老化有利于达成部分共识,而强老化与反老化则呈现相反趋势,理论预测与模拟一致。

摘要:

我们研究了含噪声动力学意见模型的临界行为,该模型受制于依赖于老化(定义为在当前意见状态下停留的时间)的改变抗性。在此模型中,每个智能体的意见可取三个离散值:极值 $\pm 1$ 和中间值 0;它可通过与其他智能体交互时的动力学交换发生演化,或通过随机选择(噪声)独立演化。由成对交互引发改变的概率取决于智能体保持在同一状态的老化时间,这一关系由给定核函数决定。我们重点研究了概率随老化时间呈代数衰减或指数衰减的情况,并考虑了概率随老化时间增加的反老化场景,这意味着在当前状态下持续越久,越有可能改变主意。对于完全图上的意见动力学,我们获得了序参量临界曲线的解析预测,与基于智能体的模拟完全一致。我们观察到,相对于老化不敏感场景,足够弱的老化(核函数随老化时间缓慢变化)有利于达成部分共识;而对于足够强的老化以及反老化,则呈现出相反的趋势。

英文摘要:

We study the critical behavior of a noisy kinetic opinion model subject to resilience to change depending on aging, defined as the time spent on the current opinion state. In this model, the opinion of each agent can take the three discrete values, the extreme ones $\pm 1$, and also the intermediate value 0, and it can evolve through kinetic exchange when interacting with another agent, or independently, by stochastic choice (noise). The probability of change by pairwise interactions depends on the age that the agent has remained in the same state, according to a given kernel. We particularly develop the cases where the probability decays either algebraically or exponentially with the age, and we also consider the anti-aging scenario where the probability increases with the age, meaning that it is more likely to change mind the longer the persistence in the current state. For the opinion dynamics in a complete graph, we obtain analytical predictions for the critical curves of the order parameters, in perfect agreement with agent-based simulations. We observe that sufficiently weak aging (slow change of the kernel with the age) favors partial consensus with respect to the aging-insensitive scenario, while for sufficiently strong aging, as well as for anti-aging, the opposite trend is observed.

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