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arXiv 2006.05710math.AP
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含内态动力学输运方程的数值格式

Numerical scheme for kinetic transport equation with internal state *

Nicolas Vauchelet, Shugo Yasuda

摘要:

研究了一类具有内态的双流动力学系统的数值离散化问题,该系统被用来模拟细胞的趋化运动。这种内部状态模拟细胞内甲基化水平。它在数学模型中增加了一个变量,这使得数值模拟更具挑战性。此外,它已被证明,从这个系统计算的宏观或介观量收敛到Keller-Segel系统在扩散标度或速度跳跃动力学系统的趋化性在双曲线标度。然后,我们注意提出的数值格式一致精度的尺度参数。我们证明了这些格式收敛于某些极限格式,这些极限格式与极限宏观或动力学系统是一致的。这项研究说明了一些数值模拟和Monte Carlo模拟的比较。

英文摘要:

We investigate the numerical discretization of a two-stream kinetic system with an internal state, such system has been introduced to model the motion of cells by chemotaxis. This internal state models the intracellular methylation level. It adds a variable in the mathematical model, which makes it more challenging to simulate numerically. Moreover, it has been shown that the macroscopic or mesoscopic quantities computed from this system converge to the Keller-Segel system at diffusive scaling or to the velocity-jump kinetic system for chemotaxis at hyperbolic scaling. Then we pay attention to propose numerical schemes uniformly accurate with respect to the scaling parameter. We show that these schemes converge to some limiting schemes which are consistent with the limiting macroscopic or kinetic system. This study is illustrated with some numerical simulations and comparisons with Monte Carlo simulations.

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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