| 阵发混沌和阵发同步:噪声在周期信号控制时空混沌中的作用及机制 |
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| 引用本文： | 桑海波,贺凯芬.阵发混沌和阵发同步:噪声在周期信号控制时空混沌中的作用及机制[J].北京师范大学学报(自然科学版),2011,47(2):159-163. |
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| 作者姓名： | 桑海波 贺凯芬 |
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| 作者单位： | 北京师范大学射线束与材料改性教育部重点实验室;北京师范大学核科学与技术学院北京市辐射中心; |
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| 基金项目： | 国家自然科学基金资助项目(10335010,10475009,10847106); 北京市优秀人才资助项目(20051D1100503) |
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| 摘 要： | 当外加适当频率和强度的周期信号时,一维等离子体驱动耗散非线性漂移波方程中的时空混沌态能够被成功控制到空间有规的层流态;通过在驱动波坐标系中将系统变换成一组在周期势中运动的耦合振子(模式),模式之间的广义相同步被认为是控制的机制之一.本文的研究则发现,足够强的外加噪声可以使控制后空间有规的系统出现时空混沌的阵发;.在逐渐增大噪声强度时,层流态被越来越多阵发的时空混沌运动打断,直至最后都变成了无规运动;.而在时空混沌的阵发阶段,相位滑移导致模式之间的广义相同步也失去了.
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| 关 键 词： | 非线性漂移波 时空混沌 相同步 阵发混沌 功率谱 |
INTERMITTENCY AND DESYNCHRONIZATION: EFFECT OF NOISE ON CONTROLLING AND SYNCHRONIZING SPATIALTEMPORAL CHAOS BY EXTERNAL PERIODIC SIGNAL AND ITS MECHANISM |
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| SANG Haibo,HE Kaifen.INTERMITTENCY AND DESYNCHRONIZATION: EFFECT OF NOISE ON CONTROLLING AND SYNCHRONIZING SPATIALTEMPORAL CHAOS BY EXTERNAL PERIODIC SIGNAL AND ITS MECHANISM[J].Journal of Beijing Normal University(Natural Science),2011,47(2):159-163. |
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| Authors: | SANG Haibo HE Kaifen |
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| Institution: | SANG Haibo HE Kaifen(The Key Laboratory of Beam Technology and Materials Modification of Ministry of Education,College of Nudear Science and Technology,Beijing Normal University,Beijing Radiation Center:100875,Beijing,China) |
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| Abstract: | Intermittent spatiotemporal chaos is observed when Gaussian white noise is applied after suppressing spatiotemporal chaos by a proper periodic signal in one-dimensional driven drift-wave system.By transforming the driving frame to a set of coupled oscillators moving in a periodic potential,phase synchronization between these oscillators in the controlled state,is found missing due to phase slips in the intermittent stage.Phase synchronization between these oscillators in the controlled state is regarded as ... |
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| Keywords: | nonlinear drift wave spatiotemporal chaos phase synchronization turbulence power spectrum |
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