本文运用理论分析和实证分析相结合的方法对这一问题进行了系统的分析。
This text carries on systematic analysis to this question with the method of the theory-analyses and demonstration-analyses.
然后运用模型结合具体的实例进行方法选择的计算。
Then the calculation of method selecting was carried out in conjunction with specific examples.
通过建立斜拉桥优化模型，运用结构分析方法，结合优化算法计算实例，对大跨度斜拉桥的动力优化设计进行了初步的探讨和研究。
Through building optimum model of truss Bridges, utilizing structural analysis methods and combining examples of optimum algorithms, the dynamic design of wide span truss Bridges is discussed.
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