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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2001, Vol. 2 Issue (3): 247-252    DOI: 10.1631/jzus.2001.0247
Science & Engineering     
MIRROR EXTENDING AND CIRCULAR SPLINE FUNCTION FOR EMPIRICAL MODE DECOMPOSITION METHOD
ZHAO Jin-ping, HUANG Da-ji
Second Institute of Oceanography, State Oceanic Administration, Hangzhou, 310012, China
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Abstract  The Mirror Extending (ME) approach is proposed in this paper for solving the end extending issue in the Empirical Mode Decomposition (EMD) method. By this approach, the data is extended into a closed circuit without end. The derivatives on ends are not necessary any more for Spline fitting. The approach eliminates the possible problems in reliability and uniqueness in the original extending approach of the EMD method. In the ME approach only one extending is necessary before the data analysis. A theoretical criterion is proposed here for checking the extending approach. ME approach has been proved to satisfy the theoretical criterion automatically and permanently. This approach makes the EMD method reliable and easy to follow.

Key words： empirical mode decomposition      mirror extension      circular Spline function      time series analysis      time-frequency domain     
Received: 14 March 2001     
CLC:  O212.4  
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HUANG Da-ji
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ZHAO Jin-ping, HUANG Da-ji. MIRROR EXTENDING AND CIRCULAR SPLINE FUNCTION FOR EMPIRICAL MODE DECOMPOSITION METHOD. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2001, 2(3): 247-252.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2001.0247     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2001/V2/I3/247

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