期刊
CHAOS SOLITONS & FRACTALS
卷 42, 期 5, 页码 2645-2652出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chaos.2009.03.171
关键词
-
资金
- NSF [ATM0538278]
- Alexander von Humboldt Foundation
Equations of motion describing dissipative dynamical systems with coefficients varying either in time or in space are considered. To identify the equations that admit a Lagrangian description, two classes of non-standard Lagrangians are introduced and general conditions required for the existence of these Lagrangians are determined. The conditions are used to obtain some non-standard Lagrangians and derive equations of motion resulting from these Lagrangians. (C) 2009 Elsevier Ltd. All rights reserved.
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