Real-time rapid prediction of variations of Earth's rotational rate

	Real-time rapid prediction of variations of Earth's rotational rate
	Wang QiJie 1,2,3; Liao DeChun 1; Zhou YongHong1
刊名	CHINESE SCIENCE BULLETIN
	2008-04-01
卷号	53 期号:7 页码:969-973
关键词	real-time prediction variation of Earth's rotational rate atmospheric angular momentum artificial neural networks
英文摘要	Real-time rapid prediction of variations of the Earth's rotational rate is of great scientific and practical importance. However, due to the complicated time-variable characteristics of variations of the Earth's rotational rate (i.e., length of day, LOD), it is usually difficult to obtain satisfactory predictions by conventional linear time series analysis methods. This study employs the nonlinear artificial neural networks (ANN) to predict the LOD variations. The topology of the ANN model is determined by minimizing the root mean square errors (RMSE) of the predictions. Considering the close relationships between the LOD variations and the atmospheric circulation movement, the operational prediction series of axial atmospheric angular momentum (AAM) is incorporated into the ANN model as an additional input in the real-time rapid prediction of LOD variations with 1-5 days ahead. The results show that the LOD prediction is significantly improved after introducing the operational prediction series of AAM into the ANN model.
WOS标题词	Science & Technology
类目[WOS]	Multidisciplinary Sciences
研究领域[WOS]	Science & Technology - Other Topics
关键词[WOS]	PARAMETERS ; LENGTH
收录类别	SCI
语种	英语
WOS记录号	WOS:000254997800002
公开日期	2010-07-30
内容类型	期刊论文
源URL	[http://119.78.226.72//handle/331011/10610]
专题	上海天文台_天文地球动力学研究中心
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Grad Univ Chinese Acad Sci, Beijing 100039, Peoples R China 3.Cent S Univ, Sch Info Phys & Geomat Engn, Changsha 410083, Peoples R China
推荐引用方式 GB/T 7714	Wang QiJie,Liao DeChun,Zhou YongHong. Real-time rapid prediction of variations of Earth's rotational rate[J]. CHINESE SCIENCE BULLETIN,2008,53(7):969-973.
APA	Wang QiJie,Liao DeChun,&Zhou YongHong.(2008).Real-time rapid prediction of variations of Earth's rotational rate.CHINESE SCIENCE BULLETIN,53(7),969-973.
MLA	Wang QiJie,et al."Real-time rapid prediction of variations of Earth's rotational rate".CHINESE SCIENCE BULLETIN 53.7(2008):969-973.