Advances in Earth Science ›› 2016, Vol. 31 ›› Issue (9): 919-925. doi: 10.11867/j.issn.1001-8166.2016.09.0919
• Orginal Article • Previous Articles Next Articles
Haiyan Quan( ), Yan Liu( )
Received:
Revised:
Online:
Published:
About author:
First author:Quan Haiyan(1970-), male, Shiping County, Yunnan Province, Associate Professor. Research areas include signal processing, intelligent optimization algorithm.E-mail:quanhaiyan@163.com
Supported by:
Haiyan Quan, Yan Liu. The Cyclic Spectrum Analysis of IMFs of EMD and Its Application to Gravity Tide[J]. Advances in Earth Science, 2016, 31(9): 919-925.
IMFs sifted out by EMD are the FM-AM components. In the paper, by the cyclic spectrum analysis, IMFs are demodulated as the two periodic components which are identical to the intrinsic physical concepts. Using the method, the half-day-tide M2, the day-tide O1, and the half-month-tide Mf are extracted from the gravity tide signal, and a conclusion is drawn that the half-day-tide M2 and the day-tide O1 are primary components of gravity tide signal, and the half-month-tide Mf is modulated in the half-day-tide M2 and the day-tide O1.