磁鞘等离子体密度统计建模
陈凯文;来鹏;赵凯;蒋勇
【期刊名称】《空间科学学报》 【年(卷),期】2017(037)006
【摘要】By using the simulation data of the ideal MHD LFM model,the model of the mean plasma density of the magnetosheath from 03:00UT to 07:00UT on November 14,2004 is established based on the Sliced Inverse Regression (SIR) and Local Polynomial Regression (LPR) method.The statistical relationship between the mean plasma density and the upstream solar wind parameters,the interplanetary magnetic field,and the geomagnetic disturbance indices are analyzed.The results show that the ionospheric disturbance intensity factor,the solar wind-magnetosphere coupling intensity factor,and the Sun-Earth coupling intensity factor are the three main factors which influence the plasma density of the magnetosheath.The up-flowing ions are the important source for magnetosphere circular current and magnetotail plasma during the recovery phase.The analyses show that,as modeling the process of space physics by the empirical regression method,the multi-collinearity problem usually leads to the poor accuracy of the model.However,the statistical models built by the non-parametric statistical method of SIP and LPR can efficiently solve the problems above.%利用理想磁流体LFM模型的模拟数据,基于非参数统计方法对2004
磁鞘等离子体密度统计建模
