| 高斯白噪声对强湍的作用及其机制研究 |
| |
| 引用本文： | 桑海波.高斯白噪声对强湍的作用及其机制研究[J].北京师范大学学报(自然科学版),2010,46(1):36-39. |
| |
| 作者姓名： | 桑海波 |
| |
| 作者单位： | 北京师范大学教育部射线束与材料改性重点实验室;北京师范大学核科学与技术学院;北京市辐射中心:100875,北京 |
| |
| 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) |
| |
| 摘 要： | 在特定的参数区域,等离子体中的驱动非线性漂移波方程将会演化到具有时空混沌特征的强湍流态;这一转变是由吸引子激变引起的.本文研究了高斯白噪声对强湍态的作用.研究发现,高斯白噪声可以改变系统向强湍转变的时间,噪声强度越大时,系统向强湍的转变越早,其机制是噪声导致了激变提前发生.
|
| 关 键 词： | 强湍 高斯白噪声 非线性漂移波方程 时空混沌 激变 |
EFFECT OF GAUSSIAN WHITE NOISE ON STRONG TURBULENCE AND MECHANISM INVOLVED |
| |
| SANG Haibo.EFFECT OF GAUSSIAN WHITE NOISE ON STRONG TURBULENCE AND MECHANISM INVOLVED[J].Journal of Beijing Normal University(Natural Science),2010,46(1):36-39. |
| |
| Authors: | SANG Haibo |
| |
| Institution: | The Key Laboratory of Beam Technology and Materials Modification of Education Ministry;Institute of Low Energy Nuclear Physics;Beijing Radiation Center: Beijing Normal University;100875;Beijing;China |
| |
| Abstract: | The driven non-linear drift wave-equation in plasma physics enters a strong turbulent state,characterised by spatiotemporal chaos,in certain parameter region,as a result of the crisis of attractors as shown before.In this paper,effect of white Gaussian noises on strong turbulence is investigated.It is found that white Gaussian noise can change the transition to strong turbulent state.Greater the noise intensity,earlier the system enters strong turbulence.Moreover,noise facilitates and fastens the occurences... |
| |
| Keywords: | turbulence white Gaussian noise nonlinear drift wave equation spatiotemporal chaos crisis |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
