简介：Themainlycharacteristicoftrappingmaterialsisthetrapdepth.Soitissignificanttocalculatethetrapdepthforthetrappingmaterials.Anewmethodofcalculatingtrapdepth,whichisbasedonenergybandandusingrateequationstoanalyzethermoluminescence,wasbroughtforward.Thismethodwhichusestherateequationsoftheprocessandthethermoluminescencecurvecanreplacetraditionalmethodssuchasfirstorderorsecondorderkinetics.ThetrapdepthofSrAl2O4:Eu2+,Dy3+andSr4Al14O25:Eu2+,Dy3+wasestimatedfromtheglowcurve.Thenthenumevicalsolutionofthetrapdepthcanbeobtained.Fromtheresultsofexperimentsandcalculations,thismethodcanaccuratelyindicatethewholeprocess.

简介：Officeautomation(OA)hasevolvedwiththedevelopmentofcomputerscience,improvingstaffefficiency.UnstructuredinformationprocessingisanimportantaspectofOA;therefore,inthispaper,weproposeanefficientmethodfordistinguishingscannedandrasterizeddocumentimageswhichcanbeusedinthisprocess.Toensuretheefficiencyandprecisionofourmethod,twostepsareincluded:rapidprocessingandclassificationusingnoisefeatures.Inthefirststep,color,skew,andisolatednoisefeaturesareusedtoidentifythesourceoftheimages.Inthesecondstep,noisefeaturesareextractedfromtheinputimageandasupportvectormachine(SVM)classifierisusedforclassification.Ourexperimentsshowthatourmethodhashighprecisionandspeedfordistinguishingscannedandrasterizeddocumentimages.

简介：纳米大小的钇铝石榴石(钇铝柘榴石)粉末被与铵氢碳酸盐把一起沉淀方法用作综合一急躁。当碘在分别地，在答案的Y3+和Al3+的起始的集中在0.018和0.03mol/L被设置的条件和pH=8上在一起沉淀过程被介绍时，结果显示一位极其松开的钇铝柘榴石先锋被获得。因而，在在为2h的1173K的锻烧与30nm和更好的sinterability的一种平均谷物尺寸由monodispersed粒子组成以后，产生钇铝柘榴石搽粉。现在的结果显示修改一起沉淀方法，与是的碘添加剂，比常规一起沉淀方法优异，综合极其细小的钇铝柘榴石粉末。

简介：Thedistributionofreducinggasinashaftfurnacedominatesthetemperatureprofile,gasutilizationratio,metallizationdegreeandistheoverwhelmingfactorforstable,highproductivitiesandlow-energy-consumptionoperation.Atthesametime,thedistributionofgasflowismainlydeterminedbythepositionofgasinlet,thepackedbedporositydistributionaswellasitschangeduetothedifferenceonthemodeoftopchargeandbottomdischarge.Wheninjectingpositionoftheprocessisfixed,thechargemodeistheonlymeansforregulatingthegasflowdistribution.Inthispaper,anumericalsimulationmodelofburdendistributionintheshaftfurnaceofCOREX3000hasbeendevelopedtoanalyzetheporositydistributionunderthedifferentchargemodesbymeansofDiscreteElementMethod(DEM).Theeffectsoftheparticlesizeanditsdistributionunderconditionsofdifferentchargebatches,chuteangle,stokelineontheburdensurfaceshapeandburdenbedparticlesizedistributionandsegregationwereinvestigated,andthentheporositydistributionintheshaftofcorrespondingchargingpatternwasquantitativelyaccessed.Therefore,theresultscanbeusedtooptimizethechargepatternsbaseonrequiredgasdistribution.

简介：Thecoolingandlubricationprocessisoneofthekeyprocessesincoldrolling,asitnotonlydeterminessurfacequalityandstripshape,butalsoreducestherollingpowerconsumptionandextendsthelifeoftherollevenduringhigh-speedoperation.Inthisstudy,aninnovativemethodcombiningemulsionlubricationandneatoillubricationwasusedtosolvesomeproblemsassociatedwithindividualpasses.Laboratorytestsonstainlesssteelstripsshowedthatthisnewlubricationmethodcouldimprovethesurfacequalityofthestrip,controltherollingfrictioninthedeformationzone,andhasthepotentialofmakinglubricationsystemssimplerandeasiertooperate,allwhilereducingthenegativeenvironmentalimpactfromemulsionprocessing.

简介：Thephase-fieldmethodhasemergedasthemethodofchoiceforthedescriptionofmicrostructureevolutionandphasetransitionsinmetallicmaterials.Followinggeneralthermodynamiclawsasetofevolutionequationsforthestructuralvariablesofthesystem,thesocalledphase-fields,arederived.Thepaperreviewsshortlythetheoreticalbackgroundofthemulti-phase-field.Differentexamplesdemonstratingtheapplicabilityofthemethodtotechnicalsteelswillbepresentedrangingfromdeformationofthedendriticstrandshellduringperitectictransformation,graingrowthinAustenitetostressdrivengrowthofPearlite.

简介：Thesynthesisofprecursorofgreenphosphors,LaPO4:Ce,Tb,bymeansofco-precipitationwithcocurrentflowfeedwasstudied.Theeffectsofthereactiontemperature,thekindandconcentrationoftheacidinthebottomwater,andthechargingrateonthephysicalproperties,suchasparticlesize,wereinvestigated.Itisfoundthattheparticlesizeofthepowderiscontrollablebyadjustingacidityinbottomwaterandchargingrate.Thepowderwithdiametersizeof3to5μmwasobtained.ItsXRDandSEMwereanalyzed.XRDpatternsoftheas-preparedgreenphosphorpowdersdisplaythetypicalpeaksofCePO4.SEMshowsthatthemorphologyofpowdersisball-shaped.

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简介：YLiF4:Er3+wassynthesizedbyhydrothermalmethod.ConcentrationofEr3+ischangedfrom0to5%.TheabsorptionofEr3+inallsamplesfrom200to1200nmwasmeasuredatroomtemperature.TheJ-OparameterscalculatedfromabsorptionspectrumareΩ2=1.05×10-20cm2,Ω4=1.25×10-20cm2andΩ6=1.35×10-20cm2.Infrared-to-visibleupconversionemissionofYLiF4:Er3+wasobservedwhenexcitedby980nm.TheresultsshowthattheEr3+contentislessthan1.5%,excite-stateabsorptionisthemainmechanismofupconversionemission.WhenEr3+contentislargerthan1.5%,bothoftheexcite-stateabsorptionandenergytransferleadtotheupconversionluminescence.TheupconversionintensitywasenhancedwiththeincreasingofEr3+concentration.Atroomtemperature,thelifetimeof2H11/2and4S3/2is205μswhilethatof4F9/2is188μsforsampleEr-2.Thetransitionratesandquantumefficiencywerealsocalculated.Thequantumefficienciesof4S3/2and4F9/2are27.9%and10.7%,respectively.

简介：TheAu/CeO2catalystsweresynthesizedbyco-precipitation(CP),deposition-precipitation(DP)andmetalliccolloidsdeposition(MCD)method,andtestedforoxidationofvolatileorganiccompounds(VOCs).ItwasrevealedthattheAu/CeO2catalystpreparedbyDPmethodwasthemostefficientcatalysttowardsthetotaloxidationoftoluene.TheAu/CeO2catalystshadobviouslyhighcatalyticactivity,andthebestresultswasobtainedon3wt.%Au/CeO2catalystpreparedbyDPmethod.Thesecatalystswerechara...

简介：

简介：YAG:Ce3+(Yttriumaluminumgarnet)fluorescencepowdersweresuccessfullypreparedbyco-precipitationmethodusingaluminumnitrate,yttriumnitrate,cerousnitrateasthestartingmaterialsandammoniumcarbonateasprecipitant.TheproductswerecharacterizedbyX-raypowderdiffraction,luminescencespectrometer,transmissionelectronmicroscope(TEM).TheXRDresultsshowedthattheobtainedYAG:Ce3+fluorescencepowdershadthecrystallinestructuresofYAGatcalcinationstemperatureof900oCandtheTEMresultsshowedthatthegraindiameterswereabout100nm.TheYAG:Ce3+fluorescencepowders,synthesizedbyco-precipitationmethod,hadthebestluminescencepropertywhentheCedopingamountwasx=0.06inthemolecularformulaofY3-xCexAl5O12,thecalcinationstimewas2handthecalcinationstemperaturewas1000°C.

简介：TheCOREXprocessisauniqueindustrializedsmeltingreductiontechnologyforiron-makingpresentlyintheworld.Oneofitsstrikingcharacteristicsisitsabilitytodirectlyutilizelumpcoalasitsmainfuel.Therefore,theCOREXprocessuseslittle,ornocokeatall.TherequirementsonlumpcoalfortheCOREXprocessweregiveninthispaper.Inordertoreducethecokeconsumptionandgiveplaytotheadvantagesofdirectlyusinglumpcoal,theappropriateratioofcoketolumpcoalneedstobedetermined.Thispaperalsosummerizedseveraladvancedmethodsofusingpowderedcoalgeneratedbythetransporting,loadingandunloadingoflumpcoal.InordertosolvethelackofcoaltypesforCOREXandobservethecrackinganddevolatilizationactionoflumpcoalinthemelter-gasifier,anexperimentaldeviceandanewmethodwereproposedtotestthecrackinganddevolatilizationcharacteristicsoflumpcoal.Bymeansofthenewmethod,thedevolatilizationandcrackingbehaviorsoflumpcoalcanbeinvestigated,whichishelpfultotheselectionoflumpcoalfortheCOREXprocess.

简介：LiNbO3单个水晶与的生长嗯(3+)并且Zn(2+)共同做使用布里奇曼方法和它的典型吸收系列和荧光系列被报导。开始包含Zn(2+)(3%)的大尺寸的晶体并且嗯(3+)(0.6%)用象0.81.5公里·h的生长率那样的优化条件与好光质量被获得(?1)并且大约3035°C·厘米的一个温度坡度(?1)越过稳固液体的接口和封上的铂坩锅。X光检查衍射和微分热分析(DTA)被用来描绘晶体。结果显示集中嗯(3+)在晶体，他们的吸收紧张，和他们的荧光紧张的离子在晶体从底部减少到顶。为水晶的上面的部分，然而，起来变换荧光紧张比800或970nm泵激动的更低的部分的高。水晶格子，他们的结构的缺点和他们的有效分离的效果嗯(3+)离子关于起来变换荧光紧张的变化被讨论。

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简介：高度有效的Tb3+激活SrAl2O4黄磷被一个联合combustionsolid状态反应方法综合。SrAl2O4的先锋:Tb3+黄磷经由一个燃烧过程被准备，然后同样准备的粉末被加热在一减少在1250点的激活的碳周围??慥獲？

简介：Redphosphor(Y,Gd)BO3:Eu3+withgrainshape,smallsize,non-agglomerate,highcrystallinityandgoodphotoluminescence(PL)intensitywaspreparedbyacomplexmethodthattheprecursorofthephosphorwaspreparedbyco-precipitationmethodandthephosphorwaspreparedbycombustionmethod.TheSEMphotosandthephotoluminescencespectrumexcitedunderVUVshowthatthemorphologyandluminescentpropertiesofthisphosphoraresatisfiedwhenanappropriateamountofureawasadoptedasthecombustionagentinthepreparationprocedure.

简介：Loadingdistributionforheavyplatemillistofindoptimalcontrolsolutionsunderthegrantedperformanceindicatorsandconstraintsincludingmillcapacityandhypothesisofrollingmodels.Thesolutionsarequitedifferentfordifferentperformanceindicators.Inthearticle,theperformanceindicatorsandsequentialquadraticprogramming(SQPforshortbelow)methodsemployedin5000mmheavyplatemillofBaoSteelarepenetratinglyanalyzed.Generally,theSQPmethodisaneffectiveandfastwaytosolvethenonlinearprogrammingproblemswithsmallormediumscaleconstraints.Earlyin1976,HanputforwardtheSQPmethodforthefirsttimeandPowellmadeitperfectandaccomplishedthealgorithmin1977.Infact,SQPmethodwastoturnanonlinearprogrammingproblemtoaseriesofsubsetofquadraticprogrammingproblems.Inthealgorithm,eachiterationstepistosolveonequadraticprogrammingproblem.Theoptimalsolutionswillbegraduallyapproachedafterquadraticprogrammingproblemsweretotallysolved.Whensolvingthequadraticprogrammingproblem,theactivesetstrategywereemployedwhichturnedtheconstrainedquadraticprogrammingproblemtounconstrainedquadraticprogrammingproblem.Theactivesetstrategymadethewholequadraticprogrammingproblembesolvedbyaleastsquareproblem.Andfinally,thematrixoftheleastsquareproblemwouldbedecomposedbyQmatrixandRmatrix.AfterQmatrixandRmatrixwereobtained,theoptimalsolutionswouldbefinallyfound.Forloadingdistribution,theperformanceindicatorswerecomposedbyplateshapeanddraftofeachpass.Plateshapeisrepresentedbyrollingforcegraduallyreducedpassbypasswithatunablefactor.Themillcapacityisanotherperformanceindicatorrepresentedbydraftofeachpass.Forheavyplatemill,themillcapacityhereisthemotormoment.Forheavydraft,themotorwouldbeoverloadedespeciallyforthefirstseveralpasses;forsmalldraft,themotorwouldbeloadedslightly.Allthesewouldnotbepermittedtohappenwhen

简介：TheeuropiumionsdopedMMoO_4(M=Sr,Ba)nanophosphorsweresuccessfullysynthesizedviaafacilehydrothermalmethodusingisopropanol.Therelationshipbetweenphosphorcrystallinephase,morphology,photoluminescentpropertiesandhexadecyltrimethylammoniumbromide(CTAB)concentration,pHvalueinprecursorsolutionwasinvestigated.TheresultsindicatedthatthemorphologyandphotoluminescentpropertieswerestronglyinfluencedbyCTABconcentrationandpHvalueinprecursorsolution.InSrMoO_4:Eu~(3+)hosts,thephosphorsurfacetendedtobecomesmootherastheconcentrationofCTABwasincreased;whileparticlestendedtoagglomerateasincreasingpHvalue.TherelativeintensityratioofchargetransferbandtoEu~(3+)characteristicemissionpeaksofMMoO_4:Eu~(3+)(M=Sr,Ba)waschangedasCTABconcentrationandpHvaluechanged.TheemissionspectraofMMoO_4:Eu~(3+)(M=Sr,Ba)couldbeadjustedbyCTABconcentrationandpHvalueduetotheirimpactsonthestructure.ItwasimportantthatthedifferentmorphologiesandphotoluminescentpropertiesofMMoO_4:Eu~(3+)(M=Sr,Ba)couldbeobtainedbythefacilehydrothermalmethodandmodulatedbychangingCTABconcentrationandpHvalue.

简介：PolycrystallineNd3+andLa3+co-dopedyttriananopowderNd3+:Y1.90La0.10O3fortransparentceramicswassynthesizedbyco-precipitationmethodusingoxalateacidastheprecipitantand(NH4)2SO4astheelectricalstabilizerunderultrasonicradiation.Nanopowderscalcinedatdifferenttemperatureswerecharacterizedwiththermalgravimetric-differentialthermalanalysis(TG/DTA),X-raydiffraction(XRD),transmittingelectronmicroscopy(TEM),energydispersivespectrometry(EDS)andspectralanalysistechniques.Th...