研究方法：理论分析法。
本课题采用理论分析法和实证分析法来进行研究。
Theory analysis and model analysis are adopted inthe research.
特别是模糊层次分析法，它是基于模糊集合理论的。
有限元法与模态分析法是本文的两大理论支柱。
Finite element and modal analysis are the support of theory.
以上三种理性分析法构成了本文的理论框架。
These three kinds of rational analysis constitute the frame of the article.
这种理论与采用成本一效益分析法有所不同。
This theory is different than applying a cost-benefit analysis to make a decision.
这种理论与采用成本一效益分析法有所不同。
This theory is different than applying a cost-benefit analysis to make a decision.
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