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简介:Theformationofsolidsolutioncombinedwithtricalciumphosphateanddicalciumsilicatecouldpromoteaconsiderableremovalofphosphorusfromliquidslagtosolidduringhotmetaldephosphorization,andthusthedephosphorizationbyusingmultiphasefluxescouldsignificantlydecreasetheconsumptionoflime.However,thereactionmechanismofmultiphasefluxeshasnotbeenunderstoodclearly.Inthepresentstudy,thephasediagramfortheCaO-SiO2-FeO-P2O5systemhasbeenmeasuredwithcertainoxygenpartialpressureathotmetalpretreatmenttemperature.ComparingwiththeCaO-SiO2-FeOsystem,shrinkageofliquidphaseareaathigherFeOcontentswasobservedat1673Kwithoxygenpartialpressureof9.2×10-11atm.
简介:Amulti-objectiveoptimizationapproachfortherollshiftingstrategyincrossrollingcampaignsofhotstripmillsispresented.Theeffectofdifferentrollshiftingstrategiesonrollwearcontourisstudiedbynumericalsimulation,andtwoevaluationindexes,namelybodysmoothnessandedgesmoothness,areproposed.Theaveragebodysmoothnessandaveragerollingedgesmoothnessofallstripsinarollingcampaignaretakenastheobjectivefunctions,theshiftingpositionsofallwidestripsasthedecisionvariables,andthemulti-objectivemethodofNSGA-Ⅱastheoptimizer.Thusamulti-objectiveoptimizationmodelfortherollshiftingstrategyisbuilt.Thesimulationresultsshowthatworkrollshiftingcanmakewearcontoursmooth,andadish-shapedwearcontourwithoutseverelocalwearcanbeachievedbytherollshiftingstrategywithvaryingstroke.OptimizationexperimentationshowsthatbymeansofNSGA-Ⅱ,agoodPareto-optimalfrontcanbeobtained,whichsuggestsaseriesofalternativesolutionsforrollshiftingstrategyoptimization.Theexperimentationalsoshowsthatthereisaconflictbetweenthetwoobjectives.Finally,applicationcasesconfirmthefeasibilityofthemulti-objectiveapproach,whichcanimprovethestripprofile,reduceedgewavesandextendtherollingmilesofarollingcampaign.
简介:做铕的borosilicate眼镜被融化熄灭过程在空中准备。Eu2+和Eu3+的混合原子价被相片光光谱和电子识别顺磁的回声(EPR)。混合原子价的存在由于unequivalent替换和同样准备的borosilicate眼镜的de聚合网络被观察。在B2O3/BaO比率的玻璃作文的变化清楚地改变了Eu3+离子的稳定性。特别地,同样准备的borosilicate眼镜展出了易兴奋的系列在397,466和534nm集中了在约592和617nm给拓宽的橘子红排放的一盏tri波长灯,由于Eu3+离子的敏感过度的转变。这同时的tri波长刺激碰巧从钇铝柘榴石从近紫外的、蓝AlInGaN薄片和那与射出的波长相应:Ce3+。在466nm刺激下面的做Eu的眼镜的全部的量收益(QY)被评估是10%,潜在地向万用的联合提供做铕的borosilicate眼镜让红部件增加改进白光的质量。
简介:4月2日,北方稀土发布公告称:北方稀土拟与内蒙古自治区科学技术厅、包头市人民政府、中国科学院北京分院共同组建中国科学院包头稀土研发中心.本次合作投资建设包头稀土研发中心,内蒙古自治区科学技术厅将拨款5000万元,包头市人民政府将拨款5000万元,作为稀土研发中心建设启动经费,并分别在各自职权范围内制定政策,支持稀土研发中心建设与运营.中国科学院北京分院将根据稀土研发中心发展需要选调相关专家、管理人员到稀土研发中心工作,协调中国科学院稀土领域有关科技资源用于稀土研发中心建设,组织和遴选相关项目落户稀土研发中心.北方稀土出资1亿元向下属的稀土研究院增资,作为稀土研发中心的配套资金.
简介:Tobreakthroughthebottle-neckofquantumyieldinupconversion(UC)core-shellsystem,weelucidatedthattheenergytransferefficiencyincore-shellsystemhadanevidentcontributionfromthechargetransferofinterfacewithrelatedtotwofactors:(1)bandoffsetsand(2)bindingenergyareadensity.Thesetwovariablesweredeterminedbymaterialintrinsicpropertiesandcore-shellthicknessratio.Wefurtherunraveledthemechanismofnon-radiativeenergytransferbychargetransferinduceddipoleattheinterface,basedonaquasi-classicalderivationfromF?rstertyperesonantenergytransfer(FRET)model.Withstablebondingacrosstheinterface,thecontributionsonenergytransferinbothradiativeandnon-radiativeenergytransfershouldalsobeaccountedtogetherinAuzel'senergytransfer(ETU)modelincore-shellsystem.Basedonthediscussionaboutinterfacebonding,bandoffsets,andformationenergies,wefiguredoutthesignificanceofinterfacebondinginducedgapstates(IBIGS)thatplayedasignificantroleforinfluencingthechargetransferandradiativetypeenergytransfer.Theinterfacebandoffsetswereakeyfactorindominatingthenon-radiativeenergytransfer,whichwasalsocorrelatedtocore-shellthicknessratio.Wefoundthattheenergyareadensitywithrelatedtocore/shellthicknessratiofollowedthetrendofBoltzmansigmoidalgrowthfunction.Bythephysicaltrend,thisworkcontributedareferencehowthemulti-layeredcore-shellstructurewasformedstartingfromtheverybeginningwithinminimumsize.Aroutewaspavedtowardsasystematicstudyoftheinterfacetounveiltheenergytransfermechanismincore-shellsystems.