%0 Journal Article
%T Variational principles for two kinds of extended Korteweg—de Vries equations
%A 曹小群
%A 宋君强
%A 张卫民
%A 赵军
%J 中国物理 B
%D 2011
%I 
%X Variational principles are constructed using the semi-inverse method for two kinds of extended Korteweg—de Vries (KdV) equations, which can be regarded as simple models of the nonlinear oceanic internal waves and atmospheric long waves, respectively. The obtained variational principles have also been proved to be correct.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=49438F68A18A4524636A50421DF28563&yid=9377ED8094509821&vid=A04140E723CB732E&iid=9CF7A0430CBB2DFD&sid=BF363AAA16C7FCB2&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=37