地球变化磁场

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。

Finally , we illustrate the effect of solar activity on Db using a simple model qualitatively .

基于混沌理论和LS-SVM的地球变化磁场时间序列预测

Prediction of the geomagnetic variation field based on chaos theory and LS-SVM

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195919651970和1976年时间段的分数维布朗运动（FBM）的维数Db。

It 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 .

地球变化磁场的分形和混沌特征

Fractal and chaotic features for varying component of the earth 's magnetic field

这表明地球变化磁场可能是混沌的。

These results indicate that the varying component of the earth 's magnetic field may be chaotic .