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  • 简介:Ⅳ'Developmenttrendofphosphorsandproposals1'DevelopmenttrendofphosphorsFromthenewdevelopingtrendofphosphorsforlampsathomeandabroad,itisnecessarytoimprovetheluminescentefficiency,colorrendering,luminousfluxmaintenanceandsecondarycharacteristicsofrareearthphosphorsandkeepconsistenceofthoseproperties.Research,development,productionandapplicationofrareearthphosphorsforlampsshouldnotbelimitedtotrichromaticphosphorsbutbeex-

  • 标签: 稀土灯 稀土荧光粉 发展趋势 发光效率 显色性 一致性
  • 简介:在这篇文章,为克利福德的一个足够的条件继续部分会聚被建立,并且一些应用被给。

  • 标签: 充分条件 收敛 连分式 分数
  • 简介:2.CharactersofNiMHpowerbatteryandrequirementsonnegativeelectrodehydrogenstoragematerialsIncontrastwithordinarysmallNiMHbattery,NiMHpowerbatteryforautosworksinthemoreharshconditions.Hence,requirementsonthecomprehensiveperformancesofNiMHpowerbatteryarestrict.MaindifferencesbetweenNiMHpowerbatteryandordinaryNiMHbatteryinclude:

  • 标签: 稀土储氢材料 镍氢电池 应用 动力电池 存储材料 NIMH
  • 简介:ZhangXiangyang:ResponsetoProfessorGuYueguoHiEveryone.I’mpleasedtoreadProf.Gu’sprovocativeideasandGary’sresponse.I’vebeenin-volvedindistanceteachingandlearningforcertainyears,thatis,workinginXuzhouRadioandTelevi-sionUniversity.In1996,notin1997,Gumadeatonguesliphere,wewereamongthefirstTVUswhichhavebeentrialingGu’BADistanceCourse,whichwonpraisesandhatredfromtheBAstudents(theyareallteachersofEnglishinmiddleschoolsinChina,withunbearablework-load)andtutorsatTVUsinChina.Why?Herearemypoints:1.DLinChinaallgetquitewellwiththetraditionalteacher-centrededucationalcontext.Theyallknowthatsomethingwrongwithit,butfewwanttodosome-thingaboutit.2.DLinChinadonotknowhowtolearn.Theyliketowaitforthecorrectkeysandex-

  • 标签: 侧压
  • 简介:<正>TherelationbetweencontinuedfractionsandBerlekamp’salgorithmwasstudiedbysomereseachers.ThelatterisaniterativeprocedureproposedfordecodingBCHcodes.However,thereremainsanunansweredquestionwhethereachoftheiterativestepsinthealgorithmcanbeinterpretedintermsofcontinuedfractions.Inthispaper,wefirstintroducetheso-calledrefinedconvergentstothecontinuedfractionexpansionofabinarysequences,andthengiveathoroughanswertothequestioninthecontextofMassey’slinearfeedbackshiftregistersynthesisalgorithmwhichisequivalenttothatofBerlekamp,andatlastweprovethatthereexistsaone-to-onecorrespondencebetweenthen-threfinedconvergentsandthelengthnsegments.

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  • 简介:4.MainbusinessincomeincreasedinlistedcompaniesChineseNdFeBindustrydevelopedsteadilyinChinain2011,andmainbusinessoflistedcompaniesalsorealizedstablegrowth.Fromthe2010AnnualReportofZhongKeSanHuanHigh-TechannouncedonApril1,2011,salesincomeofthecompanyreached2.36billionyuanin2010,anincreaseof51.05%over2009;totalprofit

  • 标签: 钕铁硼 中国 产业 上市公司 业务收入 主营业务
  • 简介:4.GlobalmagnetindustrycentershiftedEuropewastheglobalmagnetscenterbeforeWorldWarⅡ.Afterwards,ithadshiftedtoUSA.Tilllate1960s,thecenterhadmovedtoJapan.Eventually,itmovedtoChinaatthebeginningof21stcentury.Magnetoutputindifferentcountries(2005)isshowninTable3.

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  • 简介:8.JiDaiyu,GeneralManagerofBaotouXinyuanRareEarthHi-TechMaterialsCo.LtdControlgrosstostabilizeprices.Chineserareearthispreciousstrategicresource.Themoreitisexploit,thelessitwillbe.TheStatehasputforwardrareearthpolicyof"strengthenmanagement,protectresource,developscientificallyandfaceinternational".Chineserareearth

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  • 简介:7.ChinesescientistsindependentlydevelopedthecosteffectiveLa-Fe-BserieshydrogenstoragematerialsAftermorethanfouryearsefforts,hydrogenstorageresearchteaminBaotouResearchInstituteofRareEarthshaddevelopedLa_(15)Fe_(77)B_8,La_(17)Fe_(76)B_7andLa_8Fe_(27)B_(24)serieshydrogenstoragealloys,whichhavethemultiphasestructureincludingLaNi_5phase,

  • 标签: 包头稀土研究院 科技新闻 中国 储氢合金 放电性能 镍氢电池