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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Dynamics of meandering spiral waves under the modulation of a dichotomous noise
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Dynamics of meandering spiral waves under the modulation of a dichotomous noise

机译:二分频噪声调制下蜿蜒螺旋波的动力学

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In this paper, we study the effect of a dichotomous noise on meandering spiral dynamics, and exhibit how the cycloid motion of the meandering spiral tip is destroyed by the noise. Switching on the noise does not alter the primary frequency f_1 and the secondary frequency f_2 in the tip motion, which is different from the case for a periodic dichotomous modulation, where f_2 is changed according to two specific rules. However, the dichotomous noise leads to a decrease of the amplitudes at f_1 and f_2, and the rate of decrease of the amplitude at f_2 is larger than that at f_2 in the process of increasing the noise intensity or the correlation. The areas with small v-values (SV) are defined, and the distribution and size of the SV areas are analyzed, in order to explain and describe these results. It is also proved that spiral waves can be eliminated by the dichotomous noise with a large amplitude or correlation.
机译:在本文中,我们研究了二分音对弯曲螺旋动力学的影响,并展示了弯曲螺旋尖端的摆线运动如何被噪声破坏。接通噪声不会改变尖端运动中的主频率f_1和副频率f_2,这与周期性二分调制的情况不同,在周期性二分调制中,f_2根据两个特定规则进行了更改。然而,二分噪声导致在f_1和f_2处的振幅减小,并且在增加噪声强度或相关性的过程中,在f_2处的振幅的减小速率大于在f_2处的振幅的减小速率。定义具有较小v值(SV)的区域,并分析SV区域的分布和大小,以解释和描述这些结果。还证明了螺旋波可以被具有大幅度或相关性的二分噪声消除。

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