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The matrix perturbation of Complex modes has been improved by the present discussions.
上述讨论进一步完善了已有的复模态矩阵摄动法。
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In order to avoid such errors, adopting complex complete quadratic combination (CCQC) method based on complex modes is a good solution.
为了避免这样的误差，可以采用文中推荐的基于复振型的完全平方组合(CCQC)方法。
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