激发介质中去极化对螺旋波动力学影响的数值研究  

Numerical Study on Depolarization in Dynamics of Spiral Waves in Excitable Media

作　　者：黎广钊[1] 唐国宁[1] 

机构地区：[1]广西师范大学物理科学与技术学院,广西桂林541004

出　　处：《计算物理》2011年第4期626-632,共7页Chinese Journal of Computational Physics

基　　金：国家自然科学基金(批准号:10765002;10947011)资助项目

摘　　要：考虑可激发介质的不应态可以被激发,在Bar模型中引入去极化行为,研究去极化对稳定螺旋波的影响.数值模拟结果显示,适当选择去极化阈值、去极化激发时间,可以使螺旋波漂移、漫游,甚至使螺旋波漫游出系统边界,还可以使系统出现宽臂螺旋波、双臂螺旋波、双峰波、多个螺旋波共存、时空混沌等现象.对产生这些现象的机理进行了分析.Since refractory states of an excitable medium can be excited,depolarization is introduced into the Bar model.Depolarization effects on spiral waves are investigated.It shows that as threshold of depolarization and depolarization duration are chosen suitably,depolarization can induce drifting and meandering of spiral wave and even cause spiral wave moving out of boundary of the system.The dense spiral wave,two-arm spiral wave,twin speaks wave,multiple spiral wave and spatiotemporal chaos can also be generated with depolarization.Physical mechanism underlying these phenomena is discussed.

关 键 词：螺旋波 去极化 可激发介质 

分 类 号：O415[理学—理论物理]