Due to the huge volume of civil engineering structure, the vibration excitation is a difficulty; the modal identification based on environmental excitation is available.

由于土木工程结构体积大、形状复杂，外加激励难，因而利用环境激励来获取土木工程结构的模态参数被认为是一种行之有效的方法。

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This paper presented a theoretical investigation of the effects of the induced uniaxial anisotropy on excitation of magnetostatic forward volume waves under obliquely biased magnetic field.

研究了在倾斜磁场下感生单轴磁各向异性对静磁正向体波激发的影响，并考虑了易磁化轴垂直和平行于磁性薄膜两种情形。

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The results indicate that the crystalline volume fraction (X_c) decrease firstly and then increase with the increase of excitation frequency.

结果发现材料的光敏性随频率的增加先降低后提高，晶化率和沉积速率的变化趋势与之相反；

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