In this paper the method of density matrix is used to describe two coupled modes.
采用密度矩阵方法描述了两模反向耦合。
The twist and coupled modes of the asymmetry twin-tower connected structures were more complicated than the symmetry ones.
非对称双塔连体结构比对称双塔连体结构的扭转振型和耦合振型要多，振型也更为复杂；
A subspace perturbation method for structural dynamic modification of several groups of coupled-modes vibration systems is studied.
本文研究了多组耦合模态结构动力学参数修改的子空间摄动法。
A subspace perturbation method for structural dynamic modification of several groups of coupled-modes vibration systems is studied.
本文研究了多组耦合模态结构动力学参数修改的子空间摄动法。
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