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[活性介质中螺旋形和平坦周期性自激波的相互作用]

[Interaction of spiral and flat periodic autowaves in an active medium].

作者信息

Ermakova E A, Krinskiĭ V I, Panfilov A V, Pertsov A M

出版信息

Biofizika. 1986 Mar-Apr;31(2):318-23.

PMID:3697394
Abstract

Interaction between the rotating wave and a periodic external source in the model of Fitz Hugh--Nagumo type was computed. When the periods of the external source are longer than the rotation period of the spiral wave (T greater than Ts) the external source does not affect the spiral wave. At T less than Ts autowave synchronization effects are observed. The oscillation period predetermined by the external source is set in all the points of the medium except the neighbourhood of the spiral wave. The dislocation (wavebreak) persists in the medium drifting slowly at the angle to the wave vector of the flat waves. After the external source is eliminated, the spiral wave with the original period restores from this dislocation. When the dislocation reaches the interface, it disappears. In this case after the switching off of the external source the resting state is established. A theory of the drift is proposed which connects the drift velocity with the nucleus size and the rotation period of spiral wave.

摘要

计算了Fitz Hugh-Nagumo型模型中旋转波与周期性外部源之间的相互作用。当外部源的周期长于螺旋波的旋转周期(T大于Ts)时,外部源不会影响螺旋波。当T小于Ts时,会观察到自波同步效应。除螺旋波附近外,介质的所有点都设定为由外部源预先确定的振荡周期。位错(波破裂)在介质中持续存在,并以与平面波的波矢量成一定角度缓慢漂移。外部源消除后,具有原始周期的螺旋波从该位错恢复。当位错到达界面时,它就会消失。在这种情况下,外部源关闭后会建立静止状态。提出了一种漂移理论,该理论将漂移速度与核尺寸和螺旋波的旋转周期联系起来。

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