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arXiv 2302.11540math-phmath.MP
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多微观状态相互作用系统的动力学模型

Kinetic models for systems of interacting agents with multiple microscopic states

Marzia Bisi, Nadia Loy

摘要:

我们提出并研究了具有跃迁概率的玻尔兹曼型动力学模型,该模型可以描述相互作用剂的多个微观态的同时变化。这些模型可以应用于社会经济科学中的许多问题,在这些问题中,个人可能会改变他们的隔间和他们的特征动力学变量,例如流行病或可能转移代理人的国际贸易的动力学模型。我们的动力学模型的数学性质被证明,适当的Wasserstein空间中的柯西问题的解的存在性和唯一性。准不变的渐近制度,导致更简单的动力学Fokker-Planck型方程,调查和评论与其他现有的模型相比。一些数值试验进行,以显示时间演化的分布函数和有意义的宏观领域,即使在非恒定的相互作用概率的情况下。

英文摘要:

We propose and investigate general kinetic models %of Boltzmann type with transition probabilities that can describe the simultaneous change of multiple microscopic states of the interacting agents. These models can be applied to many problems in socio-economic sciences, where individuals may change both their compartment and their characteristic kinetic variable, as for instance kinetic models for epidemics or for international trade with possible transfers of agents. Mathematical properties of our kinetic model are proved, as existence and uniqueness of a solution for the Cauchy problem in suitable Wasserstein spaces. The quasi-invariant asymptotic regime, leading to simpler kinetic Fokker-Planck-type equations, is investigated and commented on in comparison with other existing models. Some numerical tests are performed in order to show time evolution of distribution functions and of meaningful macroscopic fields, even in case of non-constant interaction probabilities.

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