简介:为了从期刊文献的学科属性实现族性检索,为文章的分类统计创造条件,本刊2005起均对具有文献标识码的文章采用《中国图书馆分类法》(第四版)进行分类后。标识分类号文章一般标识1个分类号,多个主题的文章可标识2个或3个分类号;主分类号排在第一位,多个分类号之间应以分号分隔。希望有条件查询的作者在来稿时自行标明中图分类号。
简介:<正>ChinaWorldTradeCenteristhelargestcommercial,multi-useddevelopmentandtheworld’ssecond-largestworldtradecenter.Itwasestablishedin1985andfullyopenedin1990.CWTCshowsthedevelopmentofChina’stop-qualityserviceindustryandtheenhancementoftheinvestmentenvironment.Itisamini-citywith
简介:RareEarthDevelopmentinCNAICChinaNationalAeronauticalIndustryCorporation(CNAIC)wasreorganizedfromformerMinistryofAeronauticalIndustry.AccordingtothescientificresearchtaskassignedbythegovernmentandtheCNAIC’sdevelopmentprogramforaeronauticalproductsaswellastheneedofcommercialmanufacture,theRareEarthOfficeofCNAIChasbeenorganizingresearchersintheinstitutionsandenterprisesunderthecorporationtodevelopvariousREmetalmaterials,REnon-metalmaterials,REpermanentmagneticmaterialsandtheirapplicationinmotorssuccessfully.
简介:Everyrareearther,especiallybusinessman,mayhaverememberedthattheemergenceofChina’srareearthin1980’shadreallystiredtheinternationalrareearthm(?)t.Yetthecountry’sREindustryhasexperienceditsupsanddownssince.Particularlyintheearly1990’s,therareearthindustryinChinastayedinstagnationasaresultofoverdevelopedsupplyofrareearthrawmaterialproduction.Afteryears’adjustmentofthecountry’sREproductstructureandeffortofexploringREapplication,China’srareearthindustryisgettingmatureandformedtwocharacteristicgroupswiththeleadofBaotouSteel&RareEart’.CompanyandGansuRareEarthCompanyinthenorththataremainlyengagedinthedevelopmentandproductionofBaotouREresource(lightrareearths)andwiththeleadofYuelongNon-ferrousMetalsLtd.andZhujiangSmelterinthesouththatareinthedevelopmentandproductionofionadsorptionREresources(middleandheavyrareearths).