Improvement of edge effect of the wavelet time-frequency spectrum: application to the length-of-day series

	Improvement of edge effect of the wavelet time-frequency spectrum: application to the length-of-day series
	Zheng, D ; Chao, BF ; Zhou, Y ; Yu, N
刊名	JOURNAL OF GEODESY
	2000-03-01
卷号	74 期号:2 页码:249-254
关键词	wavelet transform edge effect length of day
英文摘要	The edge effect in the wavelet time-frequency spectrum of a time series is treated. The time series is first extended on both ends by applying a non-linear model, namely the leap-step time series analysis (LSTSA) model: prior to the wavelet transform. The results of a series of simulation experiments and an application to the observed length-of-day (LOD) series demonstrate that the edge effect is effectively reduced this way. Thus, the application of the LSTSA model improves the wavelet time-frequency spectrum, especially enhancing the ability to detect the low-frequency signals.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Geochemistry & Geophysics ; Remote Sensing
研究领域[WOS]	Geochemistry & Geophysics ; Remote Sensing
关键词[WOS]	EL-NINO ; SOUTHERN OSCILLATION
收录类别	SCI
语种	英语
WOS记录号	WOS:000086651600004
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/28665]
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.NASA, Goddard Space Flight Ctr, Space Geodesy Branch, Greenbelt, MD 20771 USA
推荐引用方式 GB/T 7714	Zheng, D,Chao, BF,Zhou, Y,et al. Improvement of edge effect of the wavelet time-frequency spectrum: application to the length-of-day series[J]. JOURNAL OF GEODESY,2000,74(2):249-254.
APA	Zheng, D,Chao, BF,Zhou, Y,&Yu, N.(2000).Improvement of edge effect of the wavelet time-frequency spectrum: application to the length-of-day series.JOURNAL OF GEODESY,74(2),249-254.
MLA	Zheng, D,et al."Improvement of edge effect of the wavelet time-frequency spectrum: application to the length-of-day series".JOURNAL OF GEODESY 74.2(2000):249-254.