Hamilton's principle is used to derive the equation of piezoelectric thin films and the dynamic finite element equations of intelligent structures.
利用哈密顿原理推导出压电结构的变分方程，建立了智能结构的有限元动力方程。
The measuring methods of piezoelectric properties of thin films are very different from those of bulk materials.
薄膜压电性能的测量方法与体材相比有很大不同。
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