Through comparison between primitive model and optimal model, it is proved that multi-objective design study can optimize the design objects which conflict each other.
通过原始模型和优化模型的比较，证明多目标设计研究能较好地对相互冲突的多个设计目标进行优化。
By a specific example, the process of applying multi-objective design study is described and then the optimal model is obtained.
通过实例，详细地叙述了多目标设计研究的具体实施过程，得出了优化模型。
Based on the cable-stayed bridge using method of cantilever, the paper establishes the optimization model of construction phase with multi-objective and multi-constraint and gives the example.
采用多目标、多约束的优化方法，以悬臂施工主梁的斜拉桥为例，建立了施工阶段的优化模型，并给出算例。
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