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简介：Sprayingtestwereconductedtwicebeforesteelslabswereputintothefurnaceandtheeffectsoftheoxidationresistancecoatingwereinvestigatedandverified.Bycomparingthechangeofslabweight,rollingforceoftheroughingmill&finishingmill,thicknessofoxidefilmonthesurfaceslabsbyanXL-30SEMandacidpicklingspeedofslabswithandwithoutcoating,itwasfoundthattheoxidizationwasteinthefurnacedecreasedby40percentwiththeuseofthecoatingandthecorrespondingyieldcapacitycouldincreaseby0.2percentatleast.Besides,thethicknessofoxidescalefilmonhotrolledproductswasreducedby1.44micrometersandtheacidpicklingtimewasshortenedby6swiththecoatingtechnology,whilethetotalrollingforceofRM&FMdidnotchanged.Furthermore,theapplicationprospectofthistechnologywasalsodiscussedinthispaper.

简介：Thecenterlinesegregationincontinuouscastingsteelisknowntobeformedbytheinterdendriticenrichedliquidflowatthesolidificationendinstrand.Atpresent,severalmethods,suchasthermalsoftreduction,electromagneticstirringanddynamicsoftreduction,areavailabletoreducethecentersegregationandtoimprovetheinternalquality.Althoughsomemethodscouldalleviatecentersegregationtosomeextent,theycanalsogiverisetonewproblems.Forinstance,thermalsoftreductioncanleadtosurfacecrackingduringcastingofsomesteelsandelectromagneticstirringcanresultinwhiteband.Dynamicsoftreductionisaneffectivetechnologyfortheimprovementofstrandqualityincontinuousslabcasting.Inthispaper,thekeyparametersofdynamicsoftreductiontechnology,suchassoftreductionregion,thetotalreductionamount,forlowcarbonsteelhavebeenstudiedbasedonexperimentalandtheoreticalanalysis.Thesoftreductionregionwasrelatedtothesegregationofchemicalcomposition,slabbulgingofnarrowsideandavoidinginternalcrackofslab.Thetotalreductionamountwascomposedofnaturalthermalshrinkageandactualreductionamountdependingoncriticalstrain.Forlowcarbonsteelwithslabdimensionof(950-1950)mm×170mm,thesolidfractionrangeinsoftreductionregionwasrecommendedfrom0.4to0.8,thetotalreductionamountwas2.0-2.8mm,andtheoptimizedreductionratewas0.4-1.2mm/min,respectively.Furthermore,adynamicsoftreductionsystemincontinuousslabcasting,VisualCast-Dynamic,hasbeendevelopedbymultithreadingmethod.Itdemonstratedthatthedynamicsoftreductionmodelinthisstudywascorrectwiththeabilityofonlinecontrol.

简介：TheSENforthinslabcon-castingiseasytobreakanddamagebecauseoftheoxidationduringpreheatingandapplication.TheenamelcoatingmaterialisgenerallyappliedonthesurfaceofSENtoavoidtheoxidation.Thecoatingmaterialwithbornglassandsiliconasmainstartingmaterialsandsilicasolasbinderwasstudied.ZrO2-CandAl2O3-Cmaterialscontaining15%carbonwereisostaticpressed,andheatedat600℃,900℃,1200℃,1500℃for2h,respectively.Theresultsshowthatthecoatingmaterialwith70%ofboronglassand30%ofsiliconbondedbysilicasolcanformdenserprotectionlayerintheabovementionedmaterialsattherangeof600-1500℃.Theoxidationarearatioandweightlossratiowiththecoatingaremuchlowerthanthosewithoutthecoating.

简介：这篇论文研究平板波导然后匹配的效率在之间的结束衍射远地并且它的Gaussian近似的地被分析导致分叉一半角度的一个新定义。最后，远地的罐头为什么被Gaussian功能接近，根据横梁繁殖因素的特征被介绍。

简介：Anapproximatetheoryispresentedforsolidificationinafinite,initiallyoverheatedslabinwhichonewallisinsulatedandtheotherissubjecttoaninstantaneoustemperaturedropbelowthefreezingpoint.Thesimpleexpressionsforthepositionofthephasechangefrontasafunctionoftimearederived.Theresultsarecomparedwithexperimentaldata.numericalandapproximatesolutionsaswellasexactsolutionpresentedinotherliteratureandgoodagreementisattained.ItisshownthattheapproximatemethodproposedhereinisalsovalidforphasechangeproblemswithlargeStefannumbersanddifferentboundaryconditions.

简介：Asimplifiedclosed-formanalyticsolutionforUWBimpulsesignaltransmittingthroughafinitelyconductingslabisproposed.Theapproachfirstrequiresevaluatingtheimpulseresponseoftheslabandthenconvolvingitwiththespecifiedincidentfieldwaveform.Toobtaintheimpulsivetransmittingfield,eitherforverticalorhorizontalpolarization,approximationstotherefractioncoefficientsandpropagationlossaremade,whichcanbeprovedtobeaccurateenough,comparingwiththeirfrequencydomainsolutions.Thereby,itpermitssimplifiedclosed-formexpressionsinthetimedomainforbothterms.Theresultingtransientresponseforthetransmittingimpulsefieldisthengivenbyconvolutionofthetimedomainrefractioncoefficientsandtimedomainpropagationloss.Anumericalexampleofanincidentmonocycletransmittingthroughaslabusingthistechnique,ispresented,toillustratetheeffectiveuseofthemethod.

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简介：Inhighseismiczoneregions,slenderreinforcedconcretestructuralwallsarecommonlyusedinhigh-risebuildingsasamainlateralloadresistingelement.Thesewallsareveryeffectiveinlimitingthelateraldriftofthebuildingduetotheirlargein-planestiffness.However,thepresenceoffloorslabsinfluencesthebehavioroftheshearwall.Also,thecurrentdesignrequirementsdonotaccountforthepresenceoffloorslabs.Tounderstandthebehaviorofwall-slabjunctionsandaddresstheshortcomingsofthecurrentdesignrequirements,theinfluenceoftwoparameters,namely(a)aspectratioand(b)longitudinalreinforcementratioonthebehaviorisstudiednumerically.Itisobservedthatthepresenceoffloorslabsatdifferentlevelstendstopartitionthewallintosquatwallpanelsbetweentwoconsecutivefloors.Thewall-slabjunctionsshowlargestressconcentrationsarisingfromthestrutactioninthesquatpanels.Itisalsoobservedthatthefloorslabscangetsignificantlydamagednearthewall-slabjunctionforlowerverticalreinforcementratiosinthewall.Thus,thecurrentcodeprescribedminimumreinforcementinshearwallsisnotsufficientandneedstoberevisitedatforimprovedperformance.

简介：西方的云南位于在Gondwana和劳亚古大陆之间的一个巨大的Tethyserogenic地区以内。联系威尔森orogenic周期的Magmatic活动记录证明板在这个区域传播的原因可能与亚披风羽毛有关。Tectonics，地球物理，沉积阶层，岩石圈的构造进化和另外的研究结果显示为在韦斯特云南的披风羽毛magmatic活动有地质的证据。断层摄影术也支持在韦斯特云南红河差错和一根upwelling披风羽毛附近有一个subducting平板的想法。这里，我们的研究为upwelling披风羽毛介绍地震证据，它是在韦斯特云南导致subducting平板的一个主要原因。分析基于变换的compressional-to-shear(P-to-S)地震阶段，在四川云南地震网络在地震计上记录了车站，并且在410-km和660-km断绝上，以及在叠的CCP的三节上做了研究。

简介：Theinterrelationofvariousfactorsaffectingthemechanicalstrength,thethermalshockresistivityandcreepdeformationofslabinasimplesettingconditionofthefiringoftablewarearediscussed,Theconrolofparametersinfavourofthedesiredperformanceoftheslabispropsed.

简介：Bycalculatingtheelectronstructuresofthephasesthatphosphor,sulfurandalloyingelementsdissolvinginγ-Fe,thereasonwhyalloyingelementscanbringcenterlinesegregationincontinuouscastingslab(CCS)withnA,thenumberofelectronsonthestrongestcovalentbonds,andthestructureformationfactorSwereinvestigated,andanelectronstructuralcriteriontocontrolandtoeliminatethecenterlinesegregationwasadvanced.Basingonthis,theelectronstructuresofapartofrareearthphosphidesandsulfidesarecalculated,thephysicalmechanismthatrareearthelementscancontrolthesegregationofphosphorandsulfurisanalyzed,andthecriterioniswellverified.

简介：Throughphysicalmodelingandnumericalsimulation,theflowfieldinaslabcontinuouscastingmoldwithelectromagneticstirringismeasuredunderdifferentcastingparametersandstirringcurrents.Toqualitativelyevaluatetheflowfieldinthemold,twoindexes,i.e.,moldfluxentrapmentandvelocityuniformity,areproposed.Basedonthesetwoindexes,someoptimizedstirringparametersunderdifferentcastingconditionscanbedetermined.

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简介：TheRPSmethod,whichintegratestherealnumericalsolution,theperturbationsolutionandtheshootingsolutionreasonably,canobtainthecomplexsolutionofaslabwaveguidewithsmallgain/lossregionswithoutsearchingtherootintheentirecomplexplan.ArevisiontotheRPSmethodispresentedsothatitcandealwiththewaveguideincludinglargegain/lossregions.Theapplicationindicatedthatthesimulationresultsareprecise.

简介：摘要：随着高速公路建设技术越来越成熟完善，原来在建设过程中遇到的各种问题，我们一直在寻求更具有优势的设计方案来替代传统的设计方案，其中近几年发展迅速的一种结构，桩板结构，本文主要介绍该结构的优势，并对其优势进行分析并对其应用的远景进行分析。

简介：AnewcompactopticalFanofiltersuitableforbiologicalsensingisproposed,whichpatternsphotoncrystalinsinglecrystallinesiliconnanomembranes(SiNMs)andtransferringontotransparentglasssubstrates.Theeffectsofairholesizeandsiliconthicknessonthetransmissioncharacteristicsofnewfilterarenumericallyinvestigatedbyusingthree-dimensionalfinite-differencetime-domain(FDTD)technique,thespectralresponseisalsostudiedbyback-fillingbioliquid.Theresultsshowthatthedipwavelengthwillshifttowardlongerwavelengthbyeitherreducingairholeradiusorfillingbio-liquid.Thenumberofdipswillincreasewiththeincreaseofsiliconthickness.Thesizeofproposedfiltercanbelessthan1mm2.

简介：Thermalbehaviorofthesolidifyingshellincontinuouscastingmoldisveryimportanttofinalsteelproducts.Inthepresentwork,onetwo-dimensiontransientthermal-mechanicalfiniteelementmodelwasdevelopedtosimulatethethermalbehaviorofperitecticsteelsolidifyinginslabcontinuouscastingmoldbyusingthesequentialcouplingmethod.Inthismodel,thesteelphysicalpropertiesathightemperaturewasgottenfromthemicro-segregationmodelwithδ/γtransformationinmushyzone,andtheheatfluxwasobtainedaccordingtothedisplacementbetweenthesurfaceofsolidifyingshellandthehotfaceofmoldassolidificationcontraction,theliquid-solidstructureanddistributionofmoldflux,andthetemperaturedistributionofslabsurfaceandmoldhotface,inaddition,therate-dependentelastic-viscoplasticconstitutiveequationwasappliedtoaccountfortheevolutionofshellstressinthemold.Withthismodel,thevariationcharacteristicsofsurfacetemperature,heatflux,andgrowthofthesolidifyingshellcorner,aswellasthethicknessdistributionoftheliquidflux,solidifiedflux,airgapandthecorrespondingthermalresistanceweredescribed.

简介：DynamicmodelcontroltechnologiesofsecondarycoolingandsoftreductionofBaosteelareintroduced.Modelprincipleandcontrolsystemarchitecturearesummarized,aswellasfunctionsandfeatures.Finally,applicationsofmodeltechnologiesarediscussed.Theself-developeddynamicsecondarycoolingmodelandthedynamicsoftreductionmodelhavebeenappliedonseveralcastingmachinesinsideandoutsideBaosteel,desiredcontroleffectswereachievedwithgoodstabilityandreliability.Temperaturemeasurementresultsverifiedthecorrectnessofmodel.