简介:IntroductionTungsten-copperalloypowdersareusedinmanyfieldsonaccountofthehighelectricandthermalconductivitiesofcopperandhighmeltingpointoftungsten.W-Cupowders,aspreparedconventionallybymeansofinfiltration,hasthedisadvantageofinhomogeneityinmicrostructure,andaredifficulttoworkwithaftersintering.
简介:Ahighlyreliableinterfaceofself-alignedbarrierCuSiNthinlayerbetweentheCufilmandthenano-porousSiC:H(p-SiC:H)cappingbarrier(k=3.3)hasbeendevelopedinthepresentwork.Withtheintroductionofself-alignedbarrier(SAB)CuSiNbetweenaCufilmandap-SiC:Hcappingbarrier,theinterfacialthermalstabilityandtheadhesionoftheCu/p-SiC:Hfilmareconsiderablyenhanced.AsignificantimprovementofadhesionstrengthandthermalstabilityofCu/p-SiC:H/SiOC:Hfilmstackhasbeenachievedbyoptimizingthepre-cleanstepbeforecap-layerdepositionandbyformingtheCuSiN-likephase.ThiscaplayeronthesurfaceoftheCucanprovideamorecohesiveinterfaceandeffectivelysuppressCuatommigrationaswell.
简介:AlolargodelahistorialiterariadeEspafia,espeeialmentedesdeelsigloXX,eleoneeptode"generaeion"siemprehaoeupadounpuestoimpreseindible.Loseseritoresdeedadpareeidayestilosimilarsuelenfor-maruneonjunto,osea,una"generaeion",segfinloseritieosliterarios.Enlaliteraturachinaestfiausenteeleoneeptode"generaeion"yseinelinamilsalimpaetodedinastiasenlaelasifieaeionliteraria:poesiadeTang,CideSong,dra-masdeYuan...Enesteartieulo,haeiendoeomparaeionesentrelahistorialiterariadeChinayEspafia,elautorseproponeinvestigarlafuneiondelfactorhistorieoenlaformaeiondediehasdiferenteseategoriasliterarias.
简介:线上线下商业模式(O2O)带给用户更好的线下消费体验。随着移动应用的普及,界面、功能、用户体验、服务内容等已经成为O2O商业应用(APP)需要考虑的主要因素。文章以婚纱影楼业务为例,以流行的移动操作系统iOS为平台,采用Objective-C语言,基于MVC模式设计影楼业务APP,分析APP的整体结构、主要功能模块与相关技术。
简介:NanosizedBaCeo.95Yo.o5O3-δpowderswiththehomogeneouscompositionweresynthesizedbyanewcombustionprocessbasedonthePechinimethod.Apolymericprecursorsolwasformedbyuseofcitricacidandethyleneglycolasthechelatingagentsofmetalions.Theperovskite-typeBaCeo.95Yo.o5O3-δpowderswithuniformshapeandsmallerthan40nminsizedwereobtainedthroughthecombustionofthepolymericprecursorsolattheexistenceofnitricacidandammoniumhydroxide.Itwasfoundtheparticlesizecouldbecontrolledbymodulatingthequantitiesofnitricacidandammoniumhydroxide,thequantitiesoftheresidue,carbonateionswerealsoaffectedbythequantitiesofthecitricacidandethyleneglycol.