This work shows that for a kind of centrosymmetric systems with parametric excitation, their chaotic state has centrosymmetric property. Our result illustrates that chaos with symmetry may exist.
本文工作证实，对于一类具有中心对称型的参数激励系统，其混沌态也具有中心对称性质，从而说明了浑沌并非一定是一种非对称性的动力学形态。
The stability with probability 1 of second-order linear systems with random parametric excitation and a certain class of second-order nonlinear systems with random parametric excitation is studied.
本文研究了二阶线性随机参激系统和一类二阶非线性随机参激系统的以概率1稳定性。
The results show that the ion beam has an important influence upon the parametric instability excitation in plasma systems.
结果表明：离子束对等离子体中参量不稳定性的激发有极重要的影响。
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