%0 Journal Article
%T Spectrum analysis on dissipative motion in finite systems<br>有限体系能量耗散运动的功率谱分析
%A Yuan Chang-Qing
%A Zhao Tong-Jun
%A Wang Yong-Hong
%A Zhan Yong
%A <br>袁常青
%A 赵同军
%A 王永宏
%A 展 永
%J 物理学报
%D 2005
%I 
%X Dynamical problems about energy dissipation in a finite multi-degree of freedom Hamiltonian system are studied. The energy dissipation in the relevant system is realized by numerical simulation. By employing power spectrum analysis on q(t) or p(t) of the motion in the relevant system, it is found that during the dissipative process, distribution of the power spectral density about the motion extends to both lower and higher frequencies. The more irrelevant degrees of freedom are, the broader the distribution extends. Higher frequencies decrease as time evolves but there are no remarkable changes for lower frequency components.
%K finite system
%K energy dissipation
%K relevant degree of freedom
%K power spectrum<br>有限系统，
%K 能量耗散，
%K 有关自由度，
%K 功率谱
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=A1827EC04CEDE56F&yid=2DD7160C83D0ACED&vid=318E4CC20AED4940&iid=59906B3B2830C2C5&sid=B9EDDC23994397DB&eid=4D2CB9EDC07BB10A&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=13