简介:Understandingthetransformationofliquidsteeltosolidsteelisthemostfundamentalaspectofcontinuouscasting;however,itremainsacomplexsubjectwithanumberofunresolvedissues.Inthispaper,thefollowingaspectsofmoldoperationwhichgiverisetosub-surfacedefectswillbediscussed;meniscussolidification,surfaceandinterfacialenergies,effectsofgasbubbles,andthedynamicnatureoftheliquidslag-liquidsteelinterface.
简介:Toestablishthemechanismofsurfacechangeinacontinuouspolishingsystem,anidealmathematicalmodelisbuiltbasedonWinkler’shypothesisandthePrestonequation.Thebasicfeaturesofthemodelarethechangeratesinthesurfacepeak–valley(PV)valuesoftheworkpiece,conditioningdiskandpitchlap,ratherthanthespecificsurfaceshapes.Inaddition,anequilibriumstateexistsinthesystem,indicatingthatthesurfacechangeratesareallzero.Underequilibrium,thesurfaceofthelapcouldremainflat,anditisinsensitivetothesurfaceerroroftheworkpiece.Thesecharacteristicslaythetheoreticalfoundationsforhigh-efficiencyandhigh-precisionpolishing.Themethodstoobtainanequilibriumstatewithflatsurfacesarethenproposedandconfirmedexperimentally.High-precisionsurfacesbetterthanλ/10(λ=632.8nm)areconsistentlyproducedexperimentally.
简介:在日常生活,人们经常在某些时期重复常规线路。在这篇论文,一个采矿系统被开发经过旅行发现个人的连续线路模式。数个人动人的地位的差异的无异状,采矿系统采用记录的适应GPS数据,五个数据过滤保证clean使数据犯错。采矿系统使用客户机/服务器体系结构保护个人隐私并且减少计算负担。服务者进行主要采矿过程,但是与到recover的不够的信息,真实个人发送。改进顺序的模式采矿的可伸缩性的无异状,一个新奇模式采矿算法,连续线路模式采矿(CRPM),被建议。这个算法能容忍在真实线路和摘录的不同骚乱经常的模式。基于九个人的旅行表演,那CRPM能更长多于twotimes提取的试验性的结果比传统的线路模式采矿算法发送模式。
简介:MarkovianarrivalprocesseswereintroducedbyNeutsin1979(Neuts1979)andhavebeenusedextensivelyinthestochasticmodelingofqueueing,inventory,reliability,risk,andtelecommunicationssystems.Inthispaper,weintroduceaconstructiveapproachtodefinecontinuoustimeMarkovianarrivalprocesses.TheconstructionisbasedonPoissonprocesses,andissimpleandintuitive.SuchaconstructionmakesiteasytointerprettheparametersofMarkovianarrivalprocesses.Theconstructionalsomakesitpossibletoestablishrigorouslybasicequations,suchasKolmogorovdifferentialequations,forMarkovianarrivalprocesses,usingonlyelementarypropertiesofexponentialdistributionsandPoissonprocesses.Inaddition,theapproachcanbeusedtoconstructcontinuoustimeMarkovchainswithafinitenumberofstates
简介:Inthispaper,thecontinuouselectroregenerationofionexchangeresinisinvestegated.Themixedresinisinsertedbetweenacationexchangemembraneandananionexchangemembrane.Theeffluentwateroffreshwaterroommeetsthedemandforpowerplantonwatertreatment.TheB2thatisthecumulativeformationconstantofthemetalcomplexesofresinisverydifferentewithorwithoutelectricfield.Itindicatesthatthedissociationdegreeofmetalcomplexesofresinisgreaterwitelectricfieldthanthatwithoutelectricfield.
简介:Thispaperdescribesanewkindofneuralnetwork-QuantumNeuralNetwork(QNN)anditsapplicationtorecognitionofcontinuousdigits.QNNcombinestheadvantagesofneuralmodelingandfuzzytheoreticprinciples.Experimentresultsshowthatmorethan15percenterrorreductionisachievedonaspeaker-independentcontinuousdigitsrecognitiontaskcomparedwithBPnetworks.
简介:作为正在是更经常收集了并且分析的流数据,流处理系统面临更多的设计挑战。一挑战是执行连续窗户聚集,它包含集中的计算。当有很多聚集询问时,系统可以受不了可伸缩性问题。询问通常是类似的并且仅仅在窗口说明不同。在这份报纸,我们建议支持总数在窗户之中分享的合作聚集以便重复总数操作能被避免。与分享的总数被窗户步在限制的以前的途径不同,我们作为一系列减小在多重价值上概括聚集。因此,每减小产生的结果走能被分享。分享的进程在feed被形式化语义和我们在场决定以很低的成本分享逻辑的数据的compose-and-declare框架。试验性的结果证明我们的途径把数量级性能改进提供给最先进的结果并且有一个小存储器脚印。
简介:切开的修改Hermitian和skew-Hermitian(MHSS)重复方法和preconditionedMHSS(PMHSS)重复方法分别地被介绍。在纸,根据MHSS重复方法,我们在场为与non-Hermitian和复杂对称的积极definite/semi-definite解决大稀少的连续Sylvester方程的一个PMHSS重复方法矩阵。在合适的条件下面,我们证明PMHSS重复方法的集中并且讨论光谱preconditioned矩阵的性质。而且到计算花费了的还原剂,我们建立PMHSS重复方法的不精确的变体并且详细分析它的集中性质。数字结果证明PMHSS重复方法和它的不精确的变体是为连续Sylvester方程的这个类的有效、柔韧的解答者。
简介:Inordertoresearchthetemperaturedistributionandmechanicaldeformationofslabbulgingduringhighspeedcontinuouscasting,mathematicalmodelshavebeendevelopedtoanalyzethethermalandmechanicalbehavioroftheslab.Thethermalhistoryoftheslabhasbeenpredictedbyatwo-dimensionaltransientfiniteelementheattransfermodel,whoseresultsserveastheinputtothestressmodel.Thestressmodelhasbeenformulatedforatwo-dimensionallongitudinalplane.Inthiscase,themaximumtensilestrainduringthebulgingprocessislocatedatthesolidificationfrontjustpastthetopoftheupstreamroll,whichmaycontributetocrackformation.Themaximumtensilestressesarelocatedatthecoldsurfaceinthemiddleofthetwoback-uprolls,justatthepointofthemaximumbulging.Stressesnearthesolidificationfrontaresmallbecauseofthehightemperatureswhichproducelowerelasticmodulusvalues.Finally,theeffectofthecastingspeedonthebulgingdeformationisdiscussed.
简介:Thispaperdiscussespointwiseerrorestimatesfortheapproximationbyboundedlinearoperatorsofcontinuousfunctionsdefinedoncompactmetricspaces(X,d),Theauthorsintroduceanewmajorautofthemodulusofthecontinuitywhichisthesrnallestamongthoseg(ξ)'swhichhavethefollowingpropertiesω(f,ε)≤9(f,ε)andg(f,λε)≤(1+λ)g(f,ε)andbythismajorantanewquantitativeKorovkintypetheoremonanycompactmetricspaceisproved.
简介:ThispaperintroducesACvariable-speeddrivingcontroltechnologyapplicationinthecontinuousannealingline,includingthedrivesystemconfiguration,thedrivingcontrolcharacteristicsofCALandthemaincontrolfunctionsofthedrivesystem.Firstlyintroducesthemainprocessofthecontinuousannealingline,thefeaturesofthe6SE70seriescommonDCbusdrivesystemandtheG150seriesdrivesystem.Secondly,forthecontinuousannealingline,therearemorestrictrequirementsforthecontinuityofproductionandmorespecialrequirementsforthedrivecontrolcharacteristics.Wedoalotofimprovementandstandardizationforthedrivingcontrolfunctionsandtheinterfacesofthelineautomationcontrolsystem.Thispaperdiscussesthecommunicationinterfacespecificationsandthedimensiontransformationmethodsbetweenthedriveandthebasicautomationsystem.Thedetaildimensiontransformationmethodsandcalculationmethodaboutthelinespeedsettingandtheactualrollerdimensionsettingaregiven,anddetaildescriptionforthecalculationmethodofthereferencespeedinthedrive.Articlealsoemphasizedillustratesrealizingandtestingmethodsofinertiacompensationofequipmentinthedrives,andstandardizethevalueoflineaccelerateanddeceleraterate,andtheinertiatestmethodandinertiacompensationcoefficientcalculationmethodisintroducedinthispaper.Forthebridgerollersandfurnacehelprollersloadbalancecontrol,thispaperpresentstwodifferentloadbalancecontrolstrategies,theloadbalancecontrolprincipleforbridgerollerswhichdatacommunicatesfrommainstationtoslavestationsbySimolink,andtheloadbalancecontrolprincipleforfurnacehelprollerswhichusedroopcontrol.Thedifferentcharacteristicsofthosetwomethodsarestatedindetail.
简介:ONα-BLOCHFUNCTIONSANDVMOA¥(赵如汉)ZhaoRuhan(WuhanInstituteofMathematicalSciences,AcademiaSinica,Wuhan450071,China)Abstract:Inthi...