这份合同是美国空军的“网络以及空间运行和维护”计划的一部分。
The contract is for the Air Force's Network and Space Operations and Maintenance program.
首次提出了融合列车编组计划和列车运行图的服务时空网络概念，为研究动态空车调配问题提供了一种有效的技术手段和建模方法。
This dissertation designs a service time-space network combined with train formation plan and train schedule for the first time, which makes for modeling dynamic empty car distribution.
首次提出了融合列车编组计划和列车运行图的服务时空网络概念，为研究动态空车调配问题提供了一种有效的技术手段和建模方法。
This dissertation designs a service time-space network combined with train formation plan and train schedule for the first time, which makes for modeling dynamic empty car distribution.
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