以下为句子列表：
英文: In this paper, based on track irregularity spectrum and time delay between axles, control laws of railway vehicle secondary active suspension are designed according to optimal control theory, and simulated on a vertical railway vehicle model.
中文: 摘要针对铁道车辆二系主动悬挂，考虑了轨道不平顺谱及轮轴时延的输入；依据最优控制理论，设计了整车的主动悬挂控制规律，并在整车垂向动力学模型上进行了仿真分析。
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英文: 「The alloy can be well anodized so it is applied to various structural compenent requiring medium strength,high weldability and corrosion resistance.such as plate,tube,bar and section material used in truck,tower building,vessel,trolley,railway vehicle an
中文: 典型用途：阳极氧化性能良好，用于要求有一定强度，可焊性与抗腐蚀性高的各种工业结构件，如制造卡车、塔式建筑、船舶、电车、铁道车辆、家具等用的板管，棒，型材。
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英文: Formation of the Cross Section Function of Beam and the Opitmum Design of Composed Structures──The Application of Program System DDDU- to the Optimum Design of a Railway Vehicle Framed Chassis
中文: 梁截面函数的形成及组合结构的优化设计──兼述DDDU-程序系统在某铁路车辆底架的优化设计上的应用
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