Pro/E工程剖视图与制图国标不相符合问题的解决方法

利用Pro/E三维模型与二维图形双向关联功能可以快速生成工程图,但由于在视图表达上有些方面不符合我国制图标准而影响其有效使用.本文针对Pro/E制作工程剖视图时所存在的与制图国标不相符合的问题,提出了解决这些问题的方法和技巧.     

水泥企业PLC控制系统的常见故障与处理

可编程序控制器(PLC)其性能可靠、性价比高、维护简便,在水泥生产控制中得到了广泛的应用。但使用中,因设计、使用或维护等方面原因,其电源模块、存储模块、输入输出模块及其外围线路会产生各类故障。结合故障实例,详细介绍和分析总结了PLC常见故障——电源故障、异常故障、通信故障、输入/输出回路故障、接线端子故障等等的现象、产生原因和处理措施。同时,总结了PLC系统的维护和保护的相关要求及技术措施。     

SBS改性沥青

介绍了沥青的特性，改性沥青的种类与性能，以及丁苯嵌段共聚物改性沥青的相容性，溶胀性，分散性等方面的研究进展，并提出了发展建议。     

镀镍液中铁杂质的影响及处理方法

分析了镀镍液中铁杂质的产生途径及其对镀镍层质量的影响。介绍了不同情况下铁杂质的处理方法:ρ(Fe2 )<200mg/L时,可采用添加WZ-Fe除铁剂的方法处理;日常维护,可以采用小电流电解方法除去铁杂质;当Fe2 的质量浓度很高时,用KMnO4或H2O2氧化法进行处理。     

Towards identifying the roll motion parameters of a motorcycle simulator

This study aimed at identifying the roll motion parameters of a motorcycle simulator prototype. Experienced motorcyclists tuned the angular physical movement of the mock-up and that of the visual scene to achieve an optimal riding experience during curves. The participants exceeded the rolling angles that would be required in real-world riding, while avoiding leaning the mock-up beyond 10°. In addition, they were more influenced by the speed of the virtual motorcycle than by road curvature, especially in a wide field of view. Heterogeneity was found in the roll applied to the visual scene. The overall patterns suggest that at least when washout is not applied to remove the side forces that in real-world riding are compensated by a centrifugal force, greater roll of the visual at the expense of the mock-up is mandatory to avoid performance biases that might be enhanced due to fear of falling off the simulator. Future roll motion models must take into consideration factors such as riding postures, which might not only influence the forces operating on the rider-motorcycle system, but also how motorcyclists perceive the visual world.     

一次风机节能改造

为解决一次风机出口风压低、火焰无力度、系统功耗高等问题,采用空气悬浮风机对其进行节能改造。拆除原有的一次风机备用风机,在原有底座上安装空气悬浮风机,整体设计安装悬浮风机出口管道。改造后,一次风机出口风压明显增大,煤粉燃烧充分,火焰调整灵活,每小时可节电30kWh,两处对空排放管道加装消声器,降噪效果显著。     

A multi-echelon production–inventory system with supply disruption

The article investigates an integrated multi-layer supply chain model consisting of supplier, manufacturer and retailer while supply disruption, machine breakdown, safety stock, maintenance breakdown occur simultaneously. At beginning of the production, manufacturer keeps some raw materials in stock received from second supplier at high price, as safety stock due to supply disruption of first supplier. Corrective maintenance is done immediately to restore its normal stage when machine breakdown occurs. Stock out situations at manufacturer and retailer are considered due to disruption of production for machine breakdown. The integrated expected costs of the chain in centralized (collaborating) and decentralized (Stakelberg approach) system are compared. A numerical example and its sensitivity analysis are provided to test feasibility of the model.     

基于短消息平台的气象卫星业务维护管理系统

为满足静止气象卫星地面应用系统的运行管理需求,保证业务系统的高可靠性和维护响应的高时效性,设计了一套基于短消息平台的业务维护管理系统。该系统由短消息平台、实时业务监测和自动维护管理三部分组成,能够实时监测多套卫星系统的业务关键点,及时发现业务故障和特殊事件,利用短消息平台实现消息的集中管理和即时发送,同时具备故障策略管理、维护调度管理和自动化维护响应等功能。实施效果表明该系统具备良好的适用性和可扩展性,能有效减轻维护管理人员的工作压力,为高时效和高可靠要求的大型系统维护管理工作提供有效的技术手段。     

高级维修电工模块化教学模式初探

就技工学校推行模块化教学模式的必要性进行了分析,对高级维修电工模块化教学模式的实施方法作了深入的探讨。     

尿素设备的腐蚀与维护

论述氨汽提尿素装置主要设备的腐蚀问题，分析腐蚀的原因及预防措施。