学科分类
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5 个结果
  • 简介:Baosteel's60000m3/hairseparationunit(ASU),thefirstdomestically-integratedunitofitsclass,isamilestoneintheChineseairseparationindustry.Inthispaper,theprocesscharacteristicsoftheunitandtheapplicationoftheoriginaltechniquesareexpatiated.Somedifficultiesintheprocessdesign,theriskcontrol,thequalitycontrol,thecontrolsystemintegrationandthesystemcommissioningareanalyzedandappraised.Themodeoftheprojectintegrationandinnovation,thecooperationamongindustriesandtheuser-orientatedprojectmanagementmodeareintroduced.Finally,thesuccessfulexperiencesininnovationaresummarizedwiththefocusontheintegrationoftheproject.

  • 标签: 控制系统集成 空分设备 创新 国内 一体化 项目管理模式
  • 简介:Thefirstdomestically-integratedlarge-scaleairseparationunit(ASU)withacapacityof60000m3/hwassuccessfullybuiltandputintooperationatBaosteel.Comparedwiththeelectricaldesignoftheimportedequipmentofthesametype,thisASUhasanelectricalprotectioninterlinkthatisindependentfromthedistributioncontrolsystem(DCS).Withthedesignideaofsimplicity,theASUfeaturesasimplifiedconfigurationandanaudioalarmsystemforelectricalfailures.Ithelpsreducethefailurerateoftheelectricalequipmentanddetectfailuresquicklyandaccurately.Itwilleffectivelyenhancesafeandstabilizedproduction.TheASUcannotonlyreducethecostofinvestment,butalsoensureasmoothandstablerunningofthewholeelectricalequipment.Thisstudyfocusesontheexperienceandunderstandingoftheunitdesignandcommissioning.

  • 标签: 大型空分设备 电气设计 设计经验 国内 亚利桑那州 特征
  • 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+.

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  • 简介:wurtziteZnO半导体的电子结构和磁性与稀土元素做了(RE=La,Ce,Pr,下午,Nd,Sm,Eu,Gd,Tb,Dy,惊讶,嗯,Tm和Yb)原子用极化纺纱的密度被学习功能的理论基于完整潜力的线性扩充飞机波浪(FP-LAPW)在Wien2k代码实现了的方法。在这条途径,概括坡度近似(GGA)被用于交换关联(XC)潜在。我们的结果证明在导致的ZnO的RE离子的替换在乐队差距旋转极化的局部性的状态。而且,学习数据管理系统混合物为大多数学习元素在掺杂物集中x=0.625%保留了半metallicity,与在费密水平的100%旋转极化(EF)。这些混合物的全部的磁性的时刻由于在EF,当小导致的磁性的时刻也在另外的无磁性的原子上存在时。最后,远、近的配置之间的精力差别被调查。房间温度强磁性为在近的配置的重新做的ZnO是可能的,这被发现。自从RE-RE分离,足够长(远配置)因为磁性的联合,系统变得顺磁或antiferromagnetic地面状态。

  • 标签: 氧化锌 纤锌矿 非磁性 第一性原理 金属掺杂 稀土类