周期势场作用下非均匀可激发介质中螺旋波的演化  

The Evolution of Spiral Waves in Non-uniform Excited Media under the Action of Periodic Potential Field

作　　者：潘多荣 Pan Duorong(Lanzhou Institute of Information Technology,Lanzhou,China)

机构地区：[1]兰州信息科技学院,甘肃兰州

出　　处：《科学技术创新》2024年第18期13-16,共4页Scientific and Technological Innovation

基　　金：甘肃省科技厅青年科技基金计划(20JR5RA047)。

摘　　要：本文利用FitzHugh-Nagumo模型模拟了非均匀可激发介质中螺旋波在周期势场中作用下的演化。随着外场强度和频率的变化,介质中的螺旋波会发生很大程度上的变化。弱场影响下,螺旋波的边缘发生破损,并且形成新的螺旋波,系统中仍旧是一个螺旋波占主体地位。随着外场强度增加,高频时系统出现两个主要螺旋波共同主导体统的局面。当强场作用下,系统的螺旋波被完全改变了。高频时,系统中的螺旋波现象完全消失。In this paper,the FitzHugh-Nagumo model is used to simulate the evolution of spiral waves in inhomogeneous excitable media under the action of periodic potential fields.With the change of the intensity and frequency of the external field,the spiral wave in the medium will change to a great extent.Under the influence of weak field,the edge of the spiral wave is damaged and a new spiral wave is formed,and a spiral wave still dominates the system.With the increase of external field intensity,two main helical waves dominate the system at high frequency.When a strong field is applied,the spiral wave of the system is completely changed.At high frequencies,the spiral wave phenomenon in the system completely disappears.

关 键 词：周期势场 非均匀介质 螺旋波 

分 类 号：O415[理学—理论物理]