For transportation networks that can be staging, we suggest a combination optimization model of multiple transportation mode.
对可阶段化运输网络，提出了将路径选择与交通运输方式相结合的组合优化模型。
By the combination of fuzzy reliability theory with optimization theory, a fuzzy reliability optimal mathematical model of gear transmission in wheel-side reducer is established.
通过模糊可靠性理论与优化设计理论的结合，建立了轮边减速器齿轮传动的模糊可靠性优化设计模型。
The combination of the techniques of optimization with the model experiment makes the designing and theoretical systems of the shearer drum more perfect.
将模型试验与优化理论结合，使采煤滚筒的分析、设计更为有效。
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