中国物理B ›› 2010, Vol. 19 ›› Issue (2): 20201-020201.doi: 10.1088/1674-1056/19/2/020201
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黄菲1, 张焕萍2, 陈勇3, 李彪4
Zhang Huan-Ping(张焕萍)a), Li Biao(李彪)a)d)†, Chen Yong (陈勇)a)b), and Huang Fei(黄菲)c)
摘要: By means of the reductive perturbation method, three types of generalized (2+1)-dimensional Kadomtsev--Petviashvili (KP) equations are derived from the baroclinic potential vorticity (BPV) equation, including the modified KP (mKP) equation, standard KP equation and cylindrical KP (cKP) equation. Then some solutions of generalized cKP and KP equations with certain conditions are given directly and a relationship between the generalized mKP equation and the mKP equation is established by the symmetry group direct method proposed by Lou et al. From the relationship and the solutions of the mKP equation, some solutions of the generalized mKP equation can be obtained. Furthermore, some approximate solutions of the baroclinic potential vorticity equation are derived from three types of generalized KP equations.
中图分类号: (Solitons)