基于VB6.0的铁路平、纵断面设计系统的实现

铁路平纵断面设计是铁路线路设计当中很重要的一部分,利用Visual Basi6.0编程工具、图形软件AutoCAD2004及Microsoft Access2003数据库,介绍路线自动-交互式设计系统的实现过程及特点,达到计算机辅助设计的效果.     

铁路分局防病毒体系的建立和实施

计算机病毒的防治是保障信息生产安全的重要问题.详细介绍分局级防病毒体系的研究开发过程及相关的技术方法.     

青藏铁路区域计算机联锁方案探讨

根据青藏铁路地处高原、环境恶劣、人烟稀少及运量较低的实际情况,信号系统采用区域计算机联锁控制系统是合适的,可以减少定员,降低成本,增加效益.     

计算机在铁路编组站调度工作中的应用

介绍了铁路编组站调度工作中班计划、阶段计划计算机辅助编制,说明该应用的技术可行性、实际应用效果和推广前景.     

加快推行上海铁路局无纸化办公

通过对办公自动化和无纸化办公的分析,结合上海铁路局试点实行电子公文管理系统现状,由浅入深地揭示了其自身优势和存在的不足之处,并提出了新的设想和展望,以此来取长补短,查缺补漏,推动上海铁路局办公信息化建设深入发展.     

主动全向声纳浮标回波信号仿真研究

声纳浮标是航空反潜主要的搜潜装备之一,对主动声纳浮标回波信号的研究是航空反潜作战的重要方面。从信号级对目标回波、混响和海洋噪声进行了计算机仿真,在此基础上建立了主动全向声纳浮标回波信号模型,并进行了计算机仿真。仿真结果参照主动声纳浮标系统将仿真的声纳浮标回波信号进行了频率历程图像显示。     

A Practical Approach of Developing Mathematical Model for All Speed Governors

The paper introduced a special approach for diesel‘s all-speed-governor modeling, which, in some cases,could solve the knotty problem frequently met in computer simulation of diesel propulsion system or diesel generating set. Suppose that it is hard to get a control-oriented governor mathematical model when the general approaches, the analytical approach or the experimental approach, are applied, and that an open-loop step response of the diesel engine and its system is available by means of computer simulation, the critical three parameters of a governor mathematical model, the proportional gain Kp, integral time constant Ki, and derivative time constant Kd, can be determined by use of PID tuning method which are widely applied in industrial process control. This paper discussed the train of thought of the approach, precondition, procedure, several modifications of the classical PID model, and some points for attention. A couple of case studies were given to demonstrate the effectiveness of this approach.     

Unit stream power, minimum energy dissipation rate, and river engineering

Unit stream power is the most important and dominant parameter for the determination of transport rate of sand,gravel,and hyper-concentrated sediment with wash load.Minimum energy dissipation rate theory,or its simplified minimum unit stream power and minimum stream power theories,can provide engineers the needed theoretical basis for river morphology and river engineering studies.The Generalized Sediment Transport model for Alluvial River Simulation computer mode series have been developed based on the above theories.The computer model series have been successfully applied in many countries.Examples will be used to illustrate the applications of the computer models to solving a wide range of river morphology and river engineering problems.     

舰船电磁环境预测分析方法

电磁兼容性是现代舰船必须重视的关键技术,在舰船设计各个阶段,可以采用不同的预测方法,对全舰电磁环境进行预测分析,优化配置方案、优化总体布置,尽可能在设计阶段从根本上优化电磁兼容性,为将来的实船具有良好的电磁兼容性奠定基础。     

基于Visual Basic的虚拟消磁电源控制系统设计

为了减少舰船消磁电源系统使用中由于误操作造成的损失,根据消磁电源控制系统的工作原理,分析和介绍了基于Visual Basic6．0的虚拟消磁电源控制系统的构成和设计。