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Bifurcation Chaos"],"published-print":{"date-parts":[[2020,9,30]]},"abstract":"<jats:p> In this paper, we consider some piecewise smooth Li\u00e9nard systems and study the Hopf bifurcation of limit cycles from the origin after a perturbation. We define the cyclicity [Formula: see text] of the piecewise smooth Li\u00e9nard systems at the origin and denote [Formula: see text] for fixing [Formula: see text]. Then we obtain [Formula: see text] [Formula: see text]; [Formula: see text] [Formula: see text] and [Formula: see text] [Formula: see text]. <\/jats:p>","DOI":"10.1142\/s0218127420502491","type":"journal-article","created":{"date-parts":[[2020,10,5]],"date-time":"2020-10-05T08:54:32Z","timestamp":1601888072000},"page":"2050249","source":"Crossref","is-referenced-by-count":2,"title":["Hopf Bifurcation of Limit Cycles in Some Piecewise Smooth Li\u00e9nard Systems"],"prefix":"10.1142","volume":"30","author":[{"given":"Weijiao","family":"Xu","sequence":"first","affiliation":[{"name":"School of Science, Tianjin University of Commerce, Tianjin 300134, P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maoan","family":"Han","sequence":"additional","affiliation":[{"name":"Department of Mathematics, Zhejiang Normal University, Jinhua 321004, P. R. China"},{"name":"Department of Mathematics, Shanghai Normal University, Shanghai 200234, P. R. 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