基于永磁电机的高速动车组牵引变流器的研制

基于永磁电机牵引系统的特点,从系统、主电路、故障保护、结构、散热等方面对基于永磁电机的高速动车组牵引变流器进行研究和分析。试验及实际装车应用表明,牵引变流器能够满足基于永磁电机的动车组牵引系统应用需求,可供后续永磁同步牵引系统技术在相关领域的应用参考。     

斯太尔91系列重型制动系统结构与常见故障分析

斯太尔重型汽车是我国于20世纪80年代初由奥地利引进的车型,其结构复杂、技术先进,相对来说对操作、维修保养的要求较高,这就要求驾驶人员和维修人员必须熟悉、掌握车辆的结构特点、故障原因以及维修要求.     

随机（单箱种）陆上空箱调运模型

在分析空箱调运主要特征的基础上，构造了基于机会约束规划的陆上空箱调运模型，并提出了在单箱情况下如何处理不确定数据的有效解决方法。     

The dynamic scheduling model of battlefield rush-repair tasks

During the war, equipment is constantly being damaged with limited battlefield rush-repair time and power. Therefore, some military problems are presented in this paper. In order to get more fighting time for damaged equipment to participate in operation again as much as possible, three problems should be considered properly. The first problem is how to dynamically choose the most suitable damaged equipment for each repair group. The second one is how to divide tasks between different groups. The third one is how to determine execution sequence in the same group. A mathematical model is established to solve the dynamic battlefield rushrepair task scheduling problem (DBRTSP) in wartime. A variant genetic algorithm is designed to dynamically track the change of the optimal solution. A scheduling example is solved through Matlab. Results show that the proposed model is not only scientific and reasonable, but also convenient and efficient.