简介：Basedonthethermodynamicallyself-consistentanalysisandoptimizationofthreesub-binarysystemsoftheternarysystemPrCl3-CaCl2-MgCl2,thethermodynamicsofthisternarysystemhasbeenstudied.UsingHillertmodelandtakingMgCl2asanasymmetriccomponent,thePrCl3-CaCl2-MgCl2phasediagramhasbeencalculated.Theagreementbetweencalculatedandmeasuredcompositionsandtemperaturesatdeflectingpointsonliquidusisgood.Thesystemisasimpleeutecticonewithaeutecticpointat26.0mol%PrCl3,41.5mol%CaCl2,32.5mol%MgCl2;560℃（calculated）and26.0mol%PrCl3,39.4mol%CaCl2,34.6mol%MgCl2;546℃（measured）,respectively.

简介：Consideringrollelasticflattening,newequationswereproposedtocalculatetheaveragestrainεand·averagestrainrateεinthehotstriprollingprocess.Bycomparingtheproposedequationswithcurrentlyusedequations,itwasobservedthatthestrainrateofthickstripandstrainarenotsensitivetorollelasticflattening.However,forthinstrip,anoticeablecalculateddifferenceinthestrainrateoccurredwhenrollelasticflatteningwasconsidered.

简介：Y3Al5O12:Ce3+isthemostfamousphosphormaterialduetoitsexcellentphotolumincentproperties.Here,throughfirst-principlescalculation,theeffectofcarboninterstitialdefectsonY3Al5O12:Ce3+phosphorwasinvestigated.Itisfoundthatthecarboninterstitialstendtooccupythenext-nearestsitesofCe3+ioninY3Al5O12:Ce3+lattice.Specially,theseinterstitialdefectscanshortentheCe3+-O2-bondlength,leadingtoalargercrystalfieldsplittingof5dorbitaloftheCe3+atomandbigger5dcentroidshift.ThesetwofactorscausetheemissionspectrumofY3Al5O12（C）:Ce3+redshiftcomparedwiththatofY3Al5O12:Ce3+.Moreover,withourcomparisonexperiment,wefindthattheY3Al5O12（C）:Ce3+hasanobviousredshiftcomparedwiththatofY3Al5O12:Ce3+system,whichisinaccordwithourfirstprinciplescalculation.OurworksystematicallyinvestigatestheimpactofthecarboninterstitialdefectonY3Al5O12:Ce3+,andprovidesanewroutetotunetheemissionspectruminY3Al5O12:Ce3+.

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