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arXiv 2104.09221math.DS
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化学反应网络的独立分解

Independent Decompositions of Chemical Reaction Networks

Bryan S. Hernandez, Ralph John L. De la Cruz

摘要:

化学反应网络(CRN)由反应组成,这些反应可以被视为存在于系统内的称为物种的实体之间的相互作用。CRN具有动力学特性,有一组相应的常微分方程(ODE)。在化学反应网络理论中,我们感兴趣的是CRN的结构和相应常微分方程的定性性质之间的联系。CRNS分解理论的一个结果是,如果分解是独立的,则子系统的正稳态集的交集等于整个系统的正稳态集。因此,使用独立分解的计算方法可以被用作研究大系统的有效工具。在这项工作中,我们提供了一个充要条件的非平凡的独立分解的CRN的存在,这导致了一个新的一步一步的方法来获得这样的分解,如果它存在。我们还说明了这些结果使用现实生活中的例子。特别是,我们表明,一个流行的模型的CRN厌氧酵母发酵途径有一个非平凡的独立分解,而一个特定的生物系统,这是一个正前馈和负反馈的代谢网络没有。最后,我们分析了特定流感病毒模型的反应网络的定态性质。

英文摘要:

A chemical reaction network (CRN) is composed of reactions that can be seen as interactions among entities called species, which exist within the system. Endowed with kinetics, CRN has a corresponding set of ordinary differential equations (ODEs). In Chemical Reaction Network Theory, we are interested with connections between the structure of the CRN and qualitative properties of the corresponding ODEs. One of the results in Decomposition Theory of CRNs is that the intersection of the sets of positive steady states of the subsystems is equal to the set of positive steady states of the whole system, if the decomposition is independent. Hence, computational approach using independent decompositions can be used as an efficient tool in studying large systems. In this work, we provide a necessary and sufficient condition for the existence of a nontrivial independent decomposition of a CRN, which leads to a novel step-by-step method to obtain such decomposition, if it exists. We also illustrate these results using real-life examples. In particular, we show that a CRN of a popular model of anaerobic yeast fermentation pathway has a nontrivial independent decomposition, while a particular biological system, which is a metabolic network with one positive feedforward and a negative feedback has none. Finally, we analyze properties of steady states of reaction networks of specific influenza virus models.

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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