{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,18]],"date-time":"2026-01-18T05:34:47Z","timestamp":1768714487013,"version":"3.49.0"},"reference-count":23,"publisher":"World Scientific Pub Co Pte Lt","issue":"09","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int. J. Bifurcation Chaos"],"published-print":{"date-parts":[[2015,8]]},"abstract":"<jats:p> The chaotic van der Pol oscillator is a powerful tool for detecting defects in electric systems by using online partial discharge (PD) monitoring. This paper focuses on realizing weak PD signal detection in the strong periodic narrowband interference by using high sensitivity to the periodic narrowband interference signals and immunity to white noise and PD signals of chaotic systems. A new approach to removing the periodic narrowband interference by using a van der Pol chaotic oscillator is described by analyzing the motion characteristic of the chaotic oscillator on the basis of the van der Pol equation. Furthermore, the Floquet index for measuring the amplitude of periodic narrowband signals is redefined. The denoising signal processed by the chaotic van der Pol oscillators is further processed by wavelet analysis. Finally, the denoising results verify that the periodic narrowband and white noise interference can be removed efficiently by combining the theory of the chaotic van der Pol oscillator and wavelet analysis. <\/jats:p>","DOI":"10.1142\/s0218127415501205","type":"journal-article","created":{"date-parts":[[2015,9,4]],"date-time":"2015-09-04T03:59:52Z","timestamp":1441339192000},"page":"1550120","source":"Crossref","is-referenced-by-count":4,"title":["A New Method for Suppressing Periodic Narrowband Interference Based on the Chaotic van der Pol Oscillator"],"prefix":"10.1142","volume":"25","author":[{"given":"Jia","family":"Lu","sequence":"first","affiliation":[{"name":"The State Key Laboratory of Power Transmission Equipment, System Security and New Technology, Chongqing University, Chongqing 400044, P. R. China"},{"name":"College of Computer and Information Science, Chongqing Normal University, Chongqing 401331, P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaoxing","family":"Zhang","sequence":"additional","affiliation":[{"name":"The State Key Laboratory of Power Transmission Equipment, System Security and New Technology, Chongqing University, Chongqing 400044, P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hao","family":"Xiong","sequence":"additional","affiliation":[{"name":"Maintenance Branch of State Grid Chongqing Electric Power Company, Chongqing 400039, P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"219","published-online":{"date-parts":[[2015,9,3]]},"reference":[{"key":"rf1","doi-asserted-by":"publisher","DOI":"10.1142\/S021797929100064X"},{"key":"rf2","doi-asserted-by":"publisher","DOI":"10.1016\/S0370-1573(99)00096-4"},{"key":"rf3","doi-asserted-by":"publisher","DOI":"10.1109\/TIA.2008.921382"},{"key":"rf4","first-page":"232","volume":"46","author":"Deng C.","year":"2010","journal-title":"Comput. 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