The theoretical basis of pulse hammer excitation method used to detect the damage and measure the dynamic elastic modulus of solid wood flooring is briefly explained.

介绍了脉冲锤击法检测实木地板损伤及测定其动态弹性模量的理论依据，并通过有限元模拟与试验验证了其可行性。

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This article USES a finite difference time domain method to study the two-dimensional sound field characteristics of elastic solids based on elastic solid equations.

对弹性固体中的声场方程应用时域有限差分法，进行了二维声场特性研究。

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This paper describes the removal process of odious gas H 2S with the biological membrane method, which adopts PVC elastic solid filler.

采用PVC弹性立体填料进行了好氧生物法脱硫的研究。

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