模拟与优化组合方法能结合模拟和优化两种方法的长处，更好地研究具有随机因素影响的运输网络系统。
Combinatorial Methods of simulation and optimization can be used to research the transportation system in coal wharf with their merits both in simulation and in optimization.
本文叙述了运输问题与网络规划之间的关系以及开发运输网络系统的重要意义，并给出了运输问题的数学模型。
This paper describes the relation between the transportation problem and the network flow programming, and discusses the importance of developing a transportation network system.
本论文着力针对全球区域经济间港口集装箱运输网络系统的最小费用流问题，研究运用现代优化方法来合理配置集装箱的跨洋运输。
This paper, focusing on the problem of the minimum cost in the regional containers transport network, does research on modern optimal method to deploy the overseas container transportation reasonably.
在交通运输网络中，对网络系统中时间的要求也极为严格。
In the transportation network, the demand of time is very strict.
在交通运输网络中，对网络系统中时间的要求也极为严格。
In the transportation network, the demand of time is very strict.
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