The paper analyzed the exciting vibration sources and forms while engine normal vibrating by means of mechanic vibration theory.

运用机械振动理论分析了发动机机体正常振动时的激振源和振动形式。

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The theory and strategy of vibration control for flexible redundant manipulators are studied by the optimal control theory.

应用最优控制理论，对柔性冗余度机器人振动控制问题的原理与策略进行了研究。

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The method of design and formula of calculation in the rational vibration shape are derived in the theory.

从理论上导出了求得合理振动形态的设计方法及计算公式。

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This debate on the vibration theory or the existence of unicorns will never end, but the very important underlying question of why things smell the way they do will continue to be answered by the horses among us.

BBC: 'Quantum smell' idea gains ground