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一维Chemotaxis模型双曲组的解的存在性及其抛物组的行波解 被引量:3

EXISTENCE OF SOLUTIONS FOR HYPERBOLIC SYSTEM AND TRAVELING WAVE SOLUTIONS FOR PARABOLIC SYSTEM OF CHEMOTAXIS MODEL
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摘要 研究了一类简化的 Keller- Segel模型 pt=εpxx+ a( pwxw) x,wt=λpw- b w,x∈ R,t>0 ,按照 ε=0和 ε>0两种不同的情况模型进行讨论 .当 ε=0时 ,采用特征的方法 ,通过计算特征值与黎曼不等式 ,给出问题存在局部解且不可能有整体解的一个充分条件 .当 ε>0 ,给出了它的行波解的一个形式表达式 . In this paper we study a simplified version of Keller-Segel's model for Chemotaxis in one space dimension: p t=εp xx + a(pw xw) x, w t=λpw-b w, x∈R,t>0, We consider the problem in two different cases,namely case ε=0 and ε> 0. In the case of ε=0, we apply the method of charactistic. By computing eigenvalues and Riemann invariants, we prove global existence of its solutions is impossible under certain initial conditions. In the case of ε> 0, we formally obtain a traveling wave solution.
出处 《数学杂志》 CSCD 北大核心 2005年第1期53-58,共6页 Journal of Mathematics
基金 国家重点基础研究发展规划 (973计划 )资助项目 (1 0 0 2 5 1 0 )
关键词 趋化性 黎曼不变量 局部解 行波解 chemotaxis Riemann invariants traveling wave solution global existence
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参考文献10

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同被引文献22

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