模具生产车间情景仿真建模

针对模具生产过程的复杂性,一般的数学建模又难以全面描述模具生产车间的运作过程,采用面向对象的仿真技术对模具制造系统进行建模,并通过与模具企业的ERP生产管理系统模块建立数据接口,以实际生产数据驱动仿真运行。提出了构建模具制造过程情景仿真系统的总体思路和方法,开发了某模具企业某车间的情景仿真系统,并通过该车间实际模具交货期和仿真系统预测的模具交货期进行对比,验证了该情景仿真系统的有效性。     

基于远程控制的VXI开发管理系统

以开发某大型VXI测试系统为背景,在不增加硬件投入,又能加快开发进度的前提下,提出基于远程控制来实现VXI开发管理系统,文中介绍了两种远程控制实现方法：基于VNC协议和基于Citrix终端服务架构,系统中,开发人员在本地以“透明”方式控制VXI主机,实现分布式调试,根据优先级合理调度开发人员的调试工作,从而有效地提高了VXI系统的利用率,加快了测试系统的开发进度。     

联合除湿式低温低湿恒定装置的试验研究

目前在除湿工程中冷冻方式较为普遍，但是在低温低湿所要求的温湿度条件下，纯冷冻的除湿方式使蒸发器在结霜工况下工作，制冷系统的COP较低，能耗较高。笔者设计了一套双蒸发器切换的联合除湿制冷系统，分别进行了吸附-冷却式和吸附-冷却-吸附式的试验研究，对试验结果进行了对比分析。结果表明吸附-冷却-吸附式方案具有良好的低温低湿性能。吸附冷却方式可以简化冷冻除湿制冷系统，有很强的抗干扰能力，而且蒸发温度高，系统的COP值增加。     

Self-powered/self-cleaned atmosphere monitoring system from combining hydrovoltaic,gas sensing and photocatalytic effects of TiO2 nanoparticles

A new self-powered/self-cleaned atmosphere monitoring system has been fabricated from TiO2 nanopar-ticles through combining hydrovoltaic,gas sensing and photocatalytic effects.The TiO2 nanoparticle film can convert natural thermal energy into electricity(hydrovoltaic effect)by the spontaneous water evaporation.The hydrovoltaic/gas-sensing coupling effect of TiO2 nanoparticle offers the water-evaporation-powered gas detection performance,and the outputting voltage/current has a good response to the surrounding gas atmosphere,directly acting as the gas sensing signal.The zeta potential of TiO2 is changed by the surface adsorption of gas molecules,and thus affects the electricity output of the system.The outputting electricity can directly power a wireless transmitter for transmitting the sensing infor-mation to external platform,and the whole system can work independently without electricity power supply.The rainwater can be used as the fuel of the system,and thus the system can be used outdoors without scheduled maintenance.Moreover,the photocatalytic activity of TiO2 can effectively degrade the organic pollutants on the film under photo illumination,leading to a self-clean behavior of the system.The system can probably promote the development of green sensing techniques with evaporation-induced ability.     

基于LabVIEW和狭缝吸声结构的主动吸声系统

介绍了基于LabVIEW和狭缝共振吸声结构的主动吸声系统；该系统是将虚拟仪器技术与狭缝式吸声结构相结合，通过改变狭缝宽度以改变穿孔率，从而达到主动吸声的目的；用实验的方法，对改进的狭缝共振吸声结构的共振频率公式进行修正，使其适合该虚拟仪器系统。实验表明，该系统具有虚拟仪器和穿孔板吸声结构的优点，能够有效的达到主动吸声降噪的目的。     

钢岔管CAD/CAM系统的研究与开发

给出以Visual Basic5.0 为平台,与AutoCAD相集成,设计出一套钢岔管CAD／CAM的实用软件的具体过程,成功实现了钢岔管施工放样详图的计算机辅助设计及钢板下料的计算机辅助制造。该系统能计算并绘制四种类型岔管的全套放样图,并通过CAD／CAM系统的集成,可将CAD参数传递给CAM子系统,生成焊缝代码文件,实现下料及焊接。     

陀螺系统辛子空间迭代法

转子系统的有限元分析可以导出陀螺系统的本征值问题．而陀螺本征值问题可在哈密顿体系下求解。基于辛子空间迭代法的思想，提出了一种求解陀螺系统本征值问题的算法。首先引入对偶变量，将陀螺动力系统导入哈密顿体系，将问题化为了哈密顿矩阵的本征值问题。由于稳定的陀螺系统其本征值必为纯虚数，利用这个特点。提出了对应陀螺系统的辛子空问迭代法，从而可以求出系统任意阶的本征值及其振型。算例证明了这种算法的有效性。     

Availability and mean life time prediction of multistage degraded system with partial repairs

In some environments, components might not always fail fully, but can degrade, and there can be multiple stages of degradation. In such cases, the efficiency of the system may decrease. After a certain stage of degradation the efficiency of the system may decrease to an unacceptable limit and can be considered as a total failure. However, the system can fail randomly from any stage. and can be repaired. Further, the repair action cannot bring the system to the good stage, but can make it operational and the failure rate of the system will, therefore, remain the same as before the failure. In this study, we present a model for predicting the reliability, availability, mean life time, and mean time to first failure of multistage degraded systems with partial repairs. In the analysis, state dependent transition rates for the degradation process, as well as repair processes, are considered. A numerical example is provided to illustrate the results.     

基于ajax的电力自动化验收系统设计

在传统基于B／S架构的应用系统中,任何操作都要求重新刷新页面来更新数据,带来比较糟糕的用户体验,而ajax技术可以在很大程度上改善web应用的用户体验,使得B／S架构的应用再也不用让用户陷入不断刷新页面和丢失数据的困局。为了提高系统的开发效率,本系统还使用了三层架构模式进行开发。将三层架构和ajax技术融合于电力自动化验收系统的开发,大大优化了系统的内部结构、提高了系统可维护性、降低系统响应时问还提高了用户体验。