Asymptotic dynamics of a system of conservation laws from chemotaxis

Asymptotic dynamics of a system of conservation laws from chemotaxis
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趋化性守恒定律系统的渐近动力学

DOI:
10.3934/dcds.2020301
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发表时间:
2021
影响因子:
1.1
通讯作者:
Zhao Kun
Zhao Kun
中科院分区:
数学3区
文献类型:
--
作者:
Zhu Neng;Liu Zhengrong;Wang Fang;Zhao Kun

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本文分析研究了一维空间守恒律组柯西问题解的长时间渐近性态,该问题是由一类具有奇异敏感性和非线性化学产生率的排斥趋化模型得到的。假设定常基态的初始扰动的初值范数是有限的,并利用能量方法证明了柯西问题存在唯一的全局时间解,且定常基态是全局渐近稳定的.此外,在非线性化学生产函数的不同指数范围下,确定了化学扩散模型和非扩散模型解的显式衰减率。
This paper is devoted to the analytical study of the long-time asymptotic behavior of solutions to the Cauchy problem of a system of conservation laws in one space dimension, which is derived from a repulsive chemotaxis model with singular sensitivity and nonlinear chemical production rate. Assuming the \begin{document}$ H^2 $\end{document} -norm of the initial perturbation around a constant ground state is finite and using energy methods, we show that there exists a unique global-in-time solution to the Cauchy problem, and the constant ground state is globally asymptotically stable. In addition, the explicit decay rates of the solutions to the chemically diffusive and non-diffusive models are identified under different exponent ranges of the nonlinear chemical production function.
DOI: 10.1016/0022-5193(71)90050-6
发表时间: 1971-01-01
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