摘要
本文应用微分方程定性理论、渐进分析方法、隐函数定理以及不动点理论的方法研究一类单参数二维奇异摄动系统 .给出了当系统的奇点在破坏点的小邻域时鸭解和鸭极限环存在的充分条件 .证明了存在参数值a =ac(ε) ,使得对ac(ε)小邻域中的所有参数a ,系统存在鸭极限环 .并给出了鸭解和鸭极限环的渐近估计式以及鸭极限环随参数变化的规律 .本文推广了文献 [1 ]和文献 [2
A kind of one parameter planar singular perturbation equation is studied by the qualitative theory of ordinary differential equations,asymptotic analysis methods,implicit function theorem and fixed point methods.Some sufficient conditions are given to support the existence of duck solutions and duck cycles when the singular points of the system are in the small neighbourhood of turning points.It is proved that there exists a value of parameter a= a c(ε) such that for a in a small neighbourhood of a c(ε) ,the systems have duck cycles.Moreover,the asymptotic estimation of corresponding duck solutions and duck cycles and the rule of changing of the duck cycles with parameter are obtained.The article 1 and 2 are the special cases of this paper.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2000年第5期608-611,共4页
Journal of Beijing University of Aeronautics and Astronautics
基金
国家自然科学基金青年基金资助项目! ( 1950 10 0 4 )
关键词
定性理论
小参数微分方程
奇异摄动
鸭解
asymptotic methods
qualitative theory
differential equations
singular perturbation
bifurcation
duck solution
duck cycle