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Under the assumption that the unperturbed Li\u00e9nard type system has a family of periodic orbits, we first deduce the expression for its first order Melnikov function, and then obtain the maximum number of limit cycles bifurcating from the period annulus. <\/jats:p>","DOI":"10.1142\/s0218127416501686","type":"journal-article","created":{"date-parts":[[2016,9,23]],"date-time":"2016-09-23T05:53:59Z","timestamp":1474610039000},"page":"1650168","source":"Crossref","is-referenced-by-count":2,"title":["On the Number of Limit Cycles by Perturbing a Piecewise Smooth Li\u00e9nard Model"],"prefix":"10.1142","volume":"26","author":[{"given":"Lijuan","family":"Sheng","sequence":"first","affiliation":[{"name":"Department of Mathematics, Shanghai Normal University, Shanghai 200234, P. R. 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