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Bifurcation Chaos"],"published-print":{"date-parts":[[2002,7]]},"abstract":"<jats:p>The Josephson equation with constant current and sinusoidal forcings and a phase shift is investigated in detail: the existence and the bifurcations of harmonics and subharmonics under small perturbations are given, by using the second-order averaging method and Melnikov function; the influence on bifurcations of periodic or subharmonics as the phase shift varies is considered; some numerical simulation results are reported in order to prove our theoretical predictions.<\/jats:p>","DOI":"10.1142\/s0218127402005261","type":"journal-article","created":{"date-parts":[[2002,10,1]],"date-time":"2002-10-01T20:05:06Z","timestamp":1033502706000},"page":"1515-1530","source":"Crossref","is-referenced-by-count":14,"title":["BIFURCATIONS OF PERIODIC ORBITS IN A JOSEPHSON EQUATION WITH A PHASE SHIFT"],"prefix":"10.1142","volume":"12","author":[{"given":"ZHUJUN","family":"JING","sequence":"first","affiliation":[{"name":"Institute of Mathematics, Chinese Academia of Sciences, Beijing 100080, P.R. 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