三维可激发系统中Winfree湍流态的控制  

Controlling Winfree turbulence in excitable media

作　　者：张宏[1] 曹周建[2] 李炳伟[1] 吴宁杰[1] 应和平[1] 胡岗[2] 

机构地区：[1]浙江近代物理中心浙江大学物理系,杭州310027 [2]北京师范大学物理系,北京100875

出　　处：《物理》2008年第9期631-636,共6页Physics

基　　金：国家自然科学基金(批准号:10675020,10675099,10774130)资助项目

摘　　要：三维可激发系统中的Winfree湍流态被认为与心室纤维性颤动可能有着密切的关系.如何快速而有效地消除Winfree湍流是理论工作者非常关心的问题.文章作者发展了两种可有效地控制三维可激发系统中Winfree湍流态的方法:(1)局域的周期刺激,即通过小区域内的周期刺激所产生的激发波来消除Winfree湍流;(2)全局的时空微扰,通过对参数的时空调制来消除Wnifree湍流.It is believed that ventricular fibrillation is related to Winfree turbulence in three-dimensional excitable media and much attention has been directed towards how to eliminate effectively this kind of spatiotemporal chaos.We present two schemes to suppress Winfree turbulence：（1） Localized stimulations, these generate control waves which can successfully suppress existing turbulence and dominate the whole system, （2） Spatiotemporal modulation（traveling modulation） of the excitability, in this case,Winfree turbulence can also be eliminated by choosing suitable control parameters.

关 键 词：可激发系统 Winfree湍流态 心颤 控制 

分 类 号：O357.5[理学—流体力学]