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模糊聚类分析在耀斑—地磁扰动研究中的初步应用
Alternative TitlePRELIMINARY APPLICATION OF FUZZY CLUSTERING IN THE FLARE-GEOMAGNETIC DISTURBANCE ANALYSES
蔡红昌; 魏奉思; 北京8701信箱
Department空间天气学国家重点实验室
Source Publication空间科学学报
1992
Volume12Issue:1Pages:50-56
ISSN0254-6124
Language中文
Keyword模糊聚类 聚类标指 模糊等价关系
Abstract本文运用模糊聚类分析的方法,对1975—1983年可证认出的210个耀斑-IPS激波事件进行了分析研究,给出了它们的聚类指标和模糊等价关系以及大、中、小三类耀斑-磁扰的聚类中心。初步研究结果表明:95%的耀斑-IPS激波会引起地磁扰动(∑Kp≥16);对持续1小时以上的二级耀斑和2小时以上的一级耀斑,以及多个射电源的IPS观测均出现50km/8以上的速度跳跃这类大耀斑-IPS激波事件进行模糊聚类磁扰强弱预报试验,其准确率可达80%;这种大耀斑-IPS激波事件所对应的地磁扰动变化范围很宽,从∑Kp≥12直到∑Kp≤54,这说明耀斑-激波在行星际空间的传播以及向地球的传输过程是十分复杂的。
Other AbstractThe method of fuzzy clustering is used to study 210 geomagnetic disturbance events,which were caused by the flare associated interplanetary shock waves during the period of 1975-1983.Clustering centers,fuzzy equivalent relationships and clustering indices for three kinds of clusers (i.e.large,middle and small) are obtained.Main results are: (1) for 95 % of all flare-shock waves could cause the geomagnetic disturbances (∑Kp≥16);(2) success to failure ratio of the fuzzy-clustering prediction test is about 80% for the large geomagnetic disturbance events,which were caused by those flares with imporkance》2, lasting over hour and imgortance》1,lasting over 2 hours and for those where a sudden velocity increase in the solar wind, exceeding 50kmfs, were observed with ak least 3 radio sources; and (3) for these large events, the variakion range of khe geomagnetic disturbances is very wide, from ∑Kp≥12 to ∑Kp≤54, showing that khe geomagnekic effects associaked wikh khe flare-inkerplanetary shock waves are very complicaked.
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/122/1222
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
蔡红昌,魏奉思,北京8701信箱. 模糊聚类分析在耀斑—地磁扰动研究中的初步应用[J]. 空间科学学报,1992,12(1):50-56.
APA 蔡红昌,魏奉思,&北京8701信箱.(1992).模糊聚类分析在耀斑—地磁扰动研究中的初步应用.空间科学学报,12(1),50-56.
MLA 蔡红昌,et al."模糊聚类分析在耀斑—地磁扰动研究中的初步应用".空间科学学报 12.1(1992):50-56.
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