Development of reaction-diffusion systems - Studies of singular limit methods -

反应扩散系统的开发 - 奇异极限方法的研究 -

• 批准号: 12304006
• 负责人: MIMURA Masayasu
• 金额: $ 26.88万
• 依托单位: HIROSHIMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12304006/
• 关键词: Singular limit methods; Interfacial dynamics; Singular perturbation method; Blow up problem; Traveling wave solutions; Equations of curvature; Chemotaxis equations; Center manifold theory; 反応拡散系の数値計算; 進行波; 界面運動の数値解析; ホモクリニック力学系; 進行波の反射現象; 曲率方

Reaction-diffusion systems have been encountered in many fields of natural sciences. In this project, we develop singular limit procedures and comtempolarily numerical methods in order to investigate dynamics of patterns, forms, interfaces and singularities in such systems. In the below, we show our results obtained in this project:(1) Derivation of a free boundary problem from competition-diffusion systems by using singular limit procedures(2) Qualitative study of spiky solutions in biological systems by singular limit procedures.(3) Stability analysis of skew-gradient reaction-diffusion systems.(4) Interaction of traveling pulses and spots by using dynamical system theory(5) Traveling wave solutions of reaction diffusion systems by using singular perturbation methods(6) analysis of motion of mean curvatures in higher dimensional spaces.(7) Analysis of aggregating patterns in diffusion-chemotaxis systems(8) Numerical simulations of complex spatio-temporal patterns in reaction-diffusion systems(9) Development of adoptive FEM methods to reaction-diffusion systems

反应扩散系统在自然科学的许多领域中都有遇到。在这个项目中，我们开发了奇异极限程序和通用的数值方法来研究这类系统中的模式、形式、界面和奇点的动力学。在下面的内容中，我们给出了我们在这个项目中所得到的结果：(1)用奇异极限程序从竞争-扩散系统导出一个自由边界问题(2)用奇异极限程序定性分析生物系统中的尖峰解(3)斜梯度反应-扩散系统的稳定性分析(4)用动力系统理论分析行波脉冲与斑点的相互作用(5)用奇异摄动方法求反应扩散系统的行波解(6)高维空间中平均曲率的运动分析(7)扩散-趋化系统的聚集模式分析(8)复杂结构的数值模拟反应扩散系统的时空模式(9)反应扩散系统有限元方法的发展

项目成果

S.-I. Ei: "Dynamics of metastable localized patterns and its application to the interaction of spike solutions for the Gierer-Meinhardt systems in two spatial dimensions"Japan J. Ind. Appl. Math.. 19(2). 181-226 (2002)

S.-I。

E.Yanagida: "Mini-maximizers in reaction-diffusion systems with skew-gradient structure"Diff. Eqs.. 179. 311-335 (2002)

E.Yanagida：“具有斜梯度结构的反应扩散系统中的最小最大化”Diff。

T.Ohta: "Self-Propulsion of Cellular Structures in Chemically Reacting Mixtures"Physical Review. E64. 045201-1-045201-4 (2001)

T.Ohta：“化学反应混合物中细胞结构的自推进”物理评论。

T.Tsujikawa: "Exponential attractor for a chemotaxis-growth system of equations"Nonlinear Analysis. (in press).

T.Tsujikawa：“趋化生长方程组的指数吸引子”非线性分析。

T.Ohta: "Pulse dynamics in a reaction-diffusion system"Physica D. 151. 61-72 (2001)

T.Ohta：“反应扩散系统中的脉冲动力学”Physica D. 151. 61-72 (2001)