基于RFID技术的汽车总装MES系统研究

针对汽车制造企业在总装环节出现的数据采集手段落后,生产线实时监控能力弱,制造执行系统和物流执行系统、企业资源计划等系统之间存在信息和管理断层等问题,在对RFID技术进行了汽车生产流程适用性分析之后,将RFID技术引入生产过程之中,通过工位RFID读写器完成现场生产数据的实时采集,通过系统集成接口实现MES与各系统的数据和业务集成,提出了基于射频识别技术的总装生产模式,构建了该模式下的总装制造执行系统。并在实际应用中取得成效。     

Composition of HT-7 LHCD and its Protection Systems

1. IntroductionHT-7 superconducting tokamak Il] is a mediumsize experimental device for experiment and researchof nuclear fusion. A megawatt-grade lower hybridcurrent drive (LHCD) [21 system was constructed forit in 1996. The layout of HT-7 2.45 GHz LHCD sys-tem is shown in Fig.l. For a better operation of theLHW system, whose wave source mainly consists of12 klystron amplifiers, it is necessary to studied indetail the composition of HT-7 LHCD system andits protection systems.1.1 Mas…     

A Study of Energy Conversion Efficiency Versus Plasma Density by Lower Hybrid Current Drive in HT—7 Tokamak

Ramp-up experiments by means of lower hydrid wave on HT-7 superconducting tokamak have been performed and analyzed.A ramp-up rate of over 300kA/s is obtained and a conversion efficiency of over 10% has been achieved during the ramp-up phases.The study of the dependence of conversion efficiency on plasma density shows that the conversion efficiency is affected by the driven current,which is mainly dominated by the competition of impurity concentration with wave accessibility condition.In addition,the effect of current profile may play an important role in determining the conversion efficiency.     

基于RFID的汽车总装物料配送过程的Petri网建模与仿真

分析准时化生产环境下汽车制造企业总装现场物料配送过程.将射频识别技术融入准时化生产管理模式,研究了基于射频识别技术且与装配流程协同运作的总装现场物料配送过程.用赋时着色Petri网对该过程建立模型并进行仿真分析,所获得的结果可为描述与分析基于射频识别技术的汽车总装现场物流配送过程提供一定的参考和依据.     

一种基于RFID的物流配送中心管理方案

以我国典型大型连锁超市的配送中心信息化管理为背景,研究基于RFID连锁超市物流配送中心管理,并提出利用RFID进行配送管理的实现技术和主要途径.     

基于云计算的供应链RFID信息服务研究*

针对供应链环境下现有的EPCGlobal网络存在的问题和信息服务的需求,提出一种基于云计算的射频识别技术（RFID）信息服务架构。该架构将企业的本地RFID应用与供应链公共信息服务解耦,利用基于隐马尔可夫模型的信息分布机制将RFID信息发布到云中,构建起统一的RFID信息服务云平台,为供应链环境下RFID应用提供近实时、序列级的信息服务。将该架构与EPCGlobal网络相比较论证了其优越性。     

.NET Framework中序列化与反序列化方法的分析与应用

为实现数据的持久化保存,.NET Framework提供了良好的序列化机制,三种格式的序列化方法:二进制序列化、SOAP序列化、XML序列化。在反序列化时,重新创建原始对象的相同副本。本文详细分析以上几种序列化的优缺点和实现方法,并结合应用给出一个序列化实现的实例,将它应用于WinForm窗体和控件类中取得了良好的效果。     

Sawtooth Activity during Lower Hybrid Current Drive Experiment in HT-7 Superconducting Tokamak

1.IntroductionSawtoothoscillationisoneofthemosttypicalmagnetohydrodynamic(MHD)phenomenaobservedintokamakplasmaunderavarietyofexperimentconditions[l],especiallyinhigh-powerauxiliaryheatingexperiment.IthasattractedmuchattentionbecauseofitsstrongimpactonplasmaconfinementandprovidesagoodexamplefOrthedemonstrationofvariousMHDtheories.Forthisreasonthestabi-lizationofsatttoothhasbecomeacriticalproblemfortokamakplasma.Lowerhybridcurrentdrivethroughitschangeofthectlrrentprofilecanradicallyaltertl1e…     

Technology & Experiments of the Phase Adjustment of a Lower Hybrid Wave

1.IlltroductionLowerhybridwave(LHW)isakindofquasi-electrostaticwaveswhichcanpropagatewithlowerhybridmodeinmagneticallyconfinedplasma.Itcanbeusedintokamakplasmapre--ionization'heatingandcurrentdrive.Lowerhybridwavesystemmainlyincludesthefollowingseveralparts:awavesourcewhichcanproducemicrowaveofhighpowerandlongpulse;adirect-currenthigh-voltagepowersupplywhichsupplieselectricpowertowavesource,afeederandantennasystemwhichdeliversthewavetotokamakplasma;acontrollingsystemwhichcontrolseachchannel's…     

波导真空侧射频击穿导致陶瓷窗破裂

出示真空侧波导内部打火导致陶瓷窗破裂的一些证据 ,支持关于陶瓷窗破裂是由于真空波导内靠近陶瓷窗附近(或在其上 )强射频击穿引起的观点 ,最后简要分析之。