He, Jihuan Modified straightforward expansion. (English) Zbl 1002.70019 Meccanica 34, No. 4, 287-289 (1999). On the example of Duffing equation, the author demonstrates a perturbation technique when the perturbation parameter is not necessarily small. Reviewer: Boris V.Loginov (Ul’yanovsk) Cited in 12 Documents MSC: 70K60 General perturbation schemes for nonlinear problems in mechanics Keywords:perturbation technique; Duffing equation; non-small perturbation parameter PDFBibTeX XMLCite \textit{J. He}, Meccanica 34, No. 4, 287--289 (1999; Zbl 1002.70019) Full Text: DOI