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地球变化磁场的分形和混沌特征
Alternative TitleFRACTAL AND CHAOTIC FEATURES FOR VARYING COMPONENT OF THE EARTH S MAGNETIC FIELD
王赤; 陈金波; 王水; 北京8701信箱
Department空间天气学国家重点实验室
Source Publication地球物理学报
1995
Volume38Issue:1Pages:16-24
ISSN0001-5733
Language中文
Keyword地球变化磁场 分形 混沌
Abstract将北京地区地球变化磁场的水平分量作为一无规时间序列,利用谱分析方法求出了1959,1965,1970和1976年时间段的分数维布朗运动(FBM)的维数Db。结果表明Db值与太阳活动性呈负相关。进而利用时间延迟方法来重建该序列在相空间的吸引子,计算得到吸引子的维数D=4.2±0.4,最大Lyapunov指数总是正值。这表明地球变化磁场可能是混沌的。还利用一简单模型说明太阳活动性对地球变化磁场Db值的影响。
Other AbstractIt regarded the horizontal component of the earth s magnetic field observed in Beijing as a random time series,the FBM fractal dimension Db of the time series in 1959, 1965,1970 and 1976 was obtained by use of spectra analysis.The results show that the relation between Db and the solar activity is negative.The attractor was reconstructed by means of time delay,and the dimension of the underlaying system is 4.2±0.4.The largest Lyapunov exponent is always positive.These results indicate that the varying component of the earth's magnetic field may be chaotic. Finally, we illustrate the effect of solar activity on D8 using a simple model qualitatively.
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1191
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
王赤,陈金波,王水,等. 地球变化磁场的分形和混沌特征[J]. 地球物理学报,1995,38(1):16-24.
APA 王赤,陈金波,王水,&北京8701信箱.(1995).地球变化磁场的分形和混沌特征.地球物理学报,38(1),16-24.
MLA 王赤,et al."地球变化磁场的分形和混沌特征".地球物理学报 38.1(1995):16-24.
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