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Evolution of Spiral Wave in Inhomogeneous Excitable Medium under Feedback Interaction
Author(s): 
Pages: 32-35
Year: Issue:  4
Journal: Journal of Gansu Sciences

Keyword:  螺旋波反馈控制FitzHugh-Nagumo模型非均匀介质;
Abstract: 利用FitzHugh-Nagumo模型研究了非均匀介质中产生的螺旋波在反馈作用影响下的演化.在非均匀介质系统产生稳定的螺旋波后加入反馈作用,发现当反馈强度较小时,反馈作用使得螺旋波的波纹宽窄发生改变;当增加反馈强度时螺旋波的中心首先被打碎,随着时间变化螺旋波消失,之后出现一种新的稳定斑图,另一方面,在反馈作用区域较小时,螺旋波从中心打碎到形成另一种稳定的斑图所需的时间较长;在反馈作用较大时,螺旋波在较强的反馈作用下会迅速的被打破.
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