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<article xlink="http://www.w3.org/1999/xlink" dtd-version="1.0" article-type="general-sciences" lang="en"><front><journal-meta><journal-id journal-id-type="publisher">IJCRR</journal-id><journal-id journal-id-type="nlm-ta">I Journ Cur Res Re</journal-id><journal-title-group><journal-title>International Journal of Current Research and Review</journal-title><abbrev-journal-title abbrev-type="pubmed">I Journ Cur Res Re</abbrev-journal-title></journal-title-group><issn pub-type="ppub">2231-2196</issn><issn pub-type="opub">0975-5241</issn><publisher><publisher-name>Radiance Research Academy</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">2338</article-id><article-id pub-id-type="doi"/><article-id pub-id-type="doi-url">http://dx.doi.org/10.7324/IJCRR.2017.9192</article-id><article-categories><subj-group subj-group-type="heading"><subject>General Sciences</subject></subj-group></article-categories><title-group><article-title>Natural Periodic Oscillations Extracted in the Precipitation using Empirical Mode Decomposition and Ensemble Empirical Mode Decomposition methods&#13;
</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Jyothi</surname><given-names>S.</given-names></name></contrib><contrib contrib-type="author"><name><surname>Rao</surname><given-names>S. V. B.</given-names></name></contrib><contrib contrib-type="author"><name><surname>Kishore</surname><given-names>P.</given-names></name></contrib></contrib-group><volume>)</volume><issue/><fpage>12</fpage><lpage>18</lpage><permissions><copyright-statement>This article is copyright of Popeye Publishing, 2009</copyright-statement><copyright-year>2009</copyright-year><license license-type="open-access" href="http://creativecommons.org/licenses/by/4.0/"><license-p>This is an open-access article distributed under the terms of the Creative Commons Attribution (CC BY 4.0) Licence. You may share and adapt the material, but must give appropriate credit to the source, provide a link to the licence, and indicate if changes were made.</license-p></license></permissions><abstract><p>Objective: The monthly mean precipitation over India is used to investigate natural periodic wave characteristics using a novel technique of Empirical Mode Decomposition (EMD) and Ensemble Empirical Mode Decomposition (EEMD).&#13;
Methods: These two methods empirical mode decomposition and ensemble empirical mode decomposition are interesting approach to decompose the signals into locally periodic oscillations.&#13;
Result: The Intrinsic mode functions (IMFs), will easily Identify the Embedded structures, even with those smaller amplitudes. Ensemble Empirical Mode Decomposition is better performed than the Empirical Mode Decomposition technique. The Empirical Mode Decomposition method was observe the mode mixing of two signals in Intrinsic Mode Function, but Ensemble Empirical Mode Decomposition found the distinct and clear peak of each periodic signal in each Intrinsic Mode Function.&#13;
Conclusion: In Empirical Mode Decomposition method has 11 Intrinsic Mode Functions and Ensemble Empirical Mode Decomposition has 10 Intrinsic Mode Functions, it is due to the Noise-assisted method to reduce the Intrinsic Mode Function numbers. The decomposed oscillations in Ensemble Empirical Mode Decomposition are above confidence interval and significant, it has 515 iterations than Empirical Mode Decomposition method has 740 iterations. We observe the computational time is lesser in Ensemble Empirical Mode Decomposition than Empirical Mode Decomposition method.&#13;
Key Words: Precipitation, Empirical mode decomposition (EMD), Ensemble empirical mode decomposition (EEMD), Periodic oscillations, Lomb-Scargle (LS) spectral analysis&#13;
</p></abstract><kwd-group><kwd>Precipitation</kwd><kwd> Empirical mode decomposition (EMD)</kwd><kwd> Ensemble empirical mode decomposition (EEMD)</kwd><kwd> Periodic oscillations</kwd><kwd> Lomb-Scargle (LS) spectral analysis</kwd></kwd-group></article-meta></front></article>
