%0 Journal Article
%T Form invariance for a constrained system with second-order reducible differentia l constraints<br>二阶可降阶微分约束系统的形式不变性
%A Ge Wei-Kuan
%A Zhang Yi
%A <br>葛伟宽
%A 张 毅
%J 物理学报
%D 2003
%I 
%X A form invariance for mechanical systems with second_order reducible differential constraints is studied.Two methods to study the form invariance of the systems are used.In the first method,the system is considered as a nonholonomic system with second_order and in the second method it is considered as a system after reduction.The relation between the two methods is obtained.The result proves that it is possible that some symmetries are lost in the second method.
%K constrained mechanical system
%K differential constraint
%K reduction
%K form invarian ce
%K conserved quantity<br>约束力学系统，微分约束，降阶，形式不变性，守恒量
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=DBE564B3341259B0&yid=D43C4A19B2EE3C0A&vid=286FB2D22CF8D013&iid=9CF7A0430CBB2DFD&sid=0FC8B9772E3A7521&eid=8A651639C64E11EE&journal_id=1000-3290&journal_name=物理学报&referenced_num=2&reference_num=17