简介：Thispaperstudiesthemodellingandsimulationforallformsofhcaters.Theassumptionofformerdaysthatthetemperatureofcondensationisthesaturationtemperaturecorrespondingtoheaterpressureinsteamsideisnolongerused.Onthebasisofthelawsofconservationofmass,energyandmomentum,themathematicalmodelofheatersisestablishedandthesimulationcalculationofa125MWunitismade.Thercsultshowsthatthemodelisapplicableforvariouskindsofsteam-waterheaterinpowerplant.

简介：那是一个风和日丽的日子，是去波特兰城四处逛一逛的好时光。我们几个人当时是一个夏令营的管理人员，这天休假，营员们又不在身边，正好出去开开心。这样的天气里，野餐是再好不过的了，所以到吃午饭时，我们就把野餐的目的地定在城里的一个小公园里。鉴于大家的爱好各有不同，我们决定先分开，自己去买自己喜欢吃的东西，几分钟后再在草地处碰头。

简介：花托分叉是一双建筑群引起的相对复杂的分叉多结合Floquet钳子从在Poincare节上统一圆出来。Athree公共汽车系统被采用揭示在花托分叉和一些复杂动力学之间的关系。基于理论分析和模拟研究，花托分叉是到在力量的混乱的一条典型线路，这被发现系统。一些复杂动力学通常发生在花托分叉以后例如组织工会，深分叉，优美结构，混乱和分叉的共存。混乱与力量系统的各种各样的不稳定性情形有靠近的关系，这也被发现。这篇论文的研究是有用的在力量系统和混乱和力量系统不稳定性的关系理解花托分叉的机制。

简介：使用JPG格式的图片文件,我们可以通过在幻灯片中插入图片来增加视觉效果,如果你的演示文稿中有几十幅较大的图片

简介：要制作CAI课件必须做好各种素材的收集,课件的设计、制作与运用直接体现了教师的教育教学观念,3. CAI课件的制作

简介：Amethodofmeasuringtheinteractionsinamultivariablecontrolsys-tem(MVCS)intimedomainisdefinedinthispaper.Anintelligentdecouplingcom-pensatorisdesignedintermsoftheconceptoffuzzycontrol,sothattheauto-tuningofcontrollers’parametersina2×2MVCScanbeturnedintothatoftwoindependentsingle-loopcontrolsystems(SLCS).Themethodpresentedinthepaperhassuccess-fullybeenusedinasimulationexperimentontheautomatictuningofacoordinatedcontrolsystem(CCS)inthedrum-boilerturbogeneratingunit(DBTU)andthesimu-lationresultsaxesatisfactory.

简介：High-temperaturecorrosionisaseriousproblemforthewater-walltubesofboilersusedinthermalpowerplants.Oxidation,sulfidationandmoltensaltcorrosionaremaincorrosionways.Thereinto,themostseverecorrosionoccursinmoltensaltcorrosionenvironment.Materialsrichinoxidesformers,suchaschromiumandaluminum,areneededtoresistcorrosioninhigh-temperatureandcorrosiveenvironment,butprocessabilityofsuchbulkalloysisverylimited.Highvelocityelectricarcspraying(HVAS)technologyisadoptedtoproducecoatingswithhighcorrosionresistance.Bycomparison,NiCr(Ni-45Cr-4Ti)isrecommendedasapromisingalloycoatingforthewater-walltubes,whichcanevenresistmoltensaltcorrosionattack.Inthestudyofcorrosionmechanism,themodernmaterialanalysismethods,suchasscanningelectronmicroscopy(SEM),X-raydiffractometry(XRD)andenergydispersivespectrometry(EDS),areused.ItisfoundthatthecorrosionresistancesofNiCrandFeCrAIcoatingsaremuchbetterthanthatof20gsteel,thattheNiCrcoatingshavethebestanti-corrosionproperties,andthattheNiCrcoatingshaveslightlylowerporesthanFeCrAIcoatings.Itistestifiedthatcorrosionresistanceofcoatingsismainlydeterminedbychromiumcontent,andthemicrostructureofacoatingisasimportantasthechemicalcompositionofthematerial.Inaddition,thefracturemechanismsofcoatingsinthecycleofheatingandcoolingareputforward.Thedifferenceofthethermalphysicalpropertiesbetweencoatingsandbasemetalsresultsinthethermalstressinsidethecoatings.Consequently,thecoatingsspallfromthebasemetal.

简介：介绍了客户/服务器结构下客户端开发工具与服务器端数据库互连的原理.对PowerBuilder的应用方式与数据库连接方式作了分析,给出了如何实现的方法.

简介：本文介绍了数据仓库系统的开发过程，对PowerDesigner在数据仓库系统开发过程中的应用进行了研究。