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arXiv 1202.2338math.DS
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时滞并矢相互作用的动力学模型

Dynamical Models of Dyadic Interactions with Delay

Natalia Bielczyk, Urszula Foryś, Tadeusz Płatkowski

摘要:

当个体之间的相互作用被描述为(离散或连续)动力系统时,相互作用通常被假设为瞬时的:在给定的时刻,行动者的实际状态的变化率被假设为同时取决于他们的状态。在实际应用中,自然时滞应包含在相应的模型中。本文研究了一类具有常数离散时滞的并元相互作用的线性模型。我们证明,在这样的模型中的稳定性的变化的不稳定的稳定点或反之亦然发生的各种间隔的参数,确定的相互作用的强度。给出了保证任意数目(零个、一个或多个)开关的条件,并证明了有关定理。对所有一般案件进行了系统的分析。很明显,相互作用的动力学既取决于合作伙伴对自身状态的反应强度,也取决于合作伙伴的状态。本文提出的结果表明,合作伙伴的反应的合作伙伴的状态,反映了双方合作伙伴的反应的强度的产品的联合强度,有更大的影响,对动态的关系比联合强度的反应,以自己的状态。当对伴侣状态的反应的联合强度比对他们自己的状态的反应的联合强度更强时,动力学通常要简单得多。此外,我们已经发现,只有在这种关系的情况下,其中一个合作伙伴的反应延迟自己的状态,多个稳定开关是可能的。三元相互作用的一些概括。

英文摘要:

When interpersonal interactions between individuals are described by the (discrete or continuous) dynamical systems, the interactions are usually assumed to be instantaneous: the rates of change of the actual states of the actors at given instant of time are assumed to depend on their states at the same time. In reality the natural time delay should be included in the corresponding models. We investigate a general class of linear models of dyadic interactions with a constant discrete time delay. We prove that in such models the changes of stability of the stationary points from instability to stability or vice versa occur for various intervals of the parameters which determine the intensity of interactions. The conditions guaranteeing arbitrary number (zero, one ore more) of switches are formulated and the relevant theorems are proved. A systematic analysis of all generic cases is carried out. It is obvious that the dynamics of interactions depend both on the strength of reactions of partners on their own states as well as on the partner's state. Results presented in this paper suggest that the joint strength of the reactions of partners to the partner's state, reflected by the product of the strength of reactions of both partners, has greater impact on the dynamics of relationships than the joint strength of reactions to their own states. The dynamics is typically much simpler when the joint strength of reactions to the partner's state is stronger than for their own states. Moreover, we have found that multiple stability switches are possible only in the case of such relationships in which one of the partners reacts with delay on their own state. Some generalizations to triadic interactions are also presented.

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