简介：

简介：

简介：HitachiInformationSystemsstarteduptheRFIDbusinessfrom2002andprovidesvarietiessolutions,especiallydevotedtheenergiesontheresearchofmetallictagandthedevelopmentofitsappliedarea.Themetallictagwasdevelopedtowithstandtheharshenvironmentlikevibration,shock,high-pressurewaterinjection,highvoltage,andultravioletirradiation.Becausethemetallictagthatdifferentwiththemetaltagcreatedbefore,isprotectedbythemetallicmaterialthatmadeitverystrongtobeusedintheenvironmentlistedabove.June,2006,ourcompanysuccessfullydevelopedthemetallictagwitharmor-cladstainlesssteel.Therefore,comparingwiththeresintag,themetallictagwithremarkablemechanicalstrengthwassufficientattentiontowithstandtheoutdooruse,eventoresistUV.Bythemethodofscrewfixing,rivettightening,solderingornailstriking,theinstallationprocedurecanbecompleted.Becausethevariousinstallationmethodsweresupported,themetallictagcanbeappliedtomanyindustryareas.Themanagementmarketslikeconstructionmachinery,substationequipment,molds,tools,andmetalliccontainerthatneedtheverystrongtagcanbedeveloped,becauseofthemetallictag.Inthisthesis,itwillbedescribedabouttheresearchbackgroundandtheresearchresultsofmetallictag,thecommercializedmetallictag’sfeaturesandapplicationfields,aswellastheresearchsubjectsinthefutureandrecentdevelopmentsituation.

简介：

简介：Asimplesolutionforamultilayermetallicopticalwaveguidebytransformingitintoanequivalentthree-layerslabwaveguideispresented.Thedispersionrelationoftheequivalentthree-layerslabwaveguideissolvedbyusingasimpleiterativeformula.Thismethoditselfisexactandcanapproachanyaccuracydesired.Moreover,thenumericalresultsforfour-layerandfive-layerstructuresshowthatthesecond-ordersolutionisalsoaccurateenough.ItissimpleandhasthesameformofexpressionsforTEandTMmodesandfordifferentlayerstructures.

简介：金属性的multilayers(NMM)很吸引了的nanoscale的机械行为从科学、实际的看法的注意。与他们的整体的对应物相比，在NMM存在的接口的大数字支配结构的合成材料的这个特殊的班的唯一的行为。当microlaminates的机械机制上有很多评论时，纳米技术的快速的开发为专门集中于NMM的一个基于性质的定义的概述带了紧迫的需要，他们的特别尺寸依赖者微观结构和机械性能。这篇文章试图在微观结构，机械性质和NMM的塑料变丑物理上提供全面、新的评论。我们希望这评论能完成二个目的：(1)介绍可伸缩和维的分析到研究NMM系统的科学家和工程师的基本概念，并且(2)提供接口行为和在NMM的接口在原子规模显示的非凡的质量的更好的理解。

简介：INTRODUCTIONIn1976,AlanMacDiarmid,HidekiShirakawaandI,togetherwithatalentedgroupofgraduatestudentsandpost-doctoralresearchersdiscoveredconductingpolymersandtheabilitytodopethesepolymersoverthefullrangefrominsulatortometal[1,2].Thiswasparticularlyexcitingbecauseitcreatedanewfieldofresearchontheboundarybetweenchemistryandcondensedmatterphysics,andbecauseitcreatedanumberofopportunities:

简介：

简介：Inthispaper,FeBSiNbCrmetallicglasscoatingswerepreparedontoAISI1045steelsubstratebyusingwirearcsprayingprocess.Thephaseandstructureofthecoatingwerecharacterizedbytransmissionelectronmicroscopy(TEM),X-raydiffraction(XRD)andscanningelectionmicroscopy(SEM)equippedwithenergydispersiveX-rayanalysis(EDX).Themicrostructureofthecoatingconsistsoffullamorphousphase.Thecoatinghashighhardnessandlowporosity.Fulldensityandlittleoxidesaredetectedinthecoating.Themechanicalproperties,especiallywearresistance,wereinvestigated.Therelationshipbetweenwearbehaviorandstructureofthecoatingswereanalyzedindetail.Themainfailuremechanismofthemetallicglasscoatingisbrittlebreakingandfracture.TheresultsindicatethatFeBSiNbCrmetallicglasscoatinghasexcellentresistancetoabrasivewear.

简介：Tosolvetheproblemonthemicrostructuralcharacterizationofmetallicsuperlattices,takingtheNiFe/Cusuperlatticesasexample,weshowthatthesturcturesofmetallicsuperlatticescanbecharacterizedexactlybycombininglow-angleX-raydiffractionwithhigh-angleX-raydiffraction.First,wedetermineexactlythetotalfilmthicknessbyastraightforwardandprecisemethodbasedonamodifiedBragglawfromthesubsidiarymaximaaroundthelow-angleX-raydiffractionpeak.Then.bycombiningwiththesimulationofhigh-angleX-raydiffraction.weobtainthesturcturalparameterssuchasthesuperlatticeperiod,thesublayerandbufferthickness,Thischaracterizationprocedureisalsoapplicabletoothertypesofmetallicsuperlattices.

简介：Anechoicchambersareusedforindoorantennameasurements.Thecommonmethodofconstructingananechoicchamberistocoverallinsidewallsbytheelectromagneticabsorbers.Inthispaper,afullymetallicsphericalchamberstructureispresentedinwhichthepropagationoftheelectromagneticwavesinsidethechamberiscontrolledandtheyareguidedtoanabsorber.Intheproposedmethod,anappropriatequietzoneisobtained,andunlikeordinaryanechoicchambers,theabsorberusageamountisreducedgreatly.Theperformanceofthechamberisevaluatedbysimulation.Theresultsshowthattheproposedmethodcouldprovideausefultechniquefortheindoorantennameasurements.

简介：BasedonPb-Pbisochrondataofmorethan40Precambrianpolymetallicdeposits,theauthorsconsiderthattherearefourmineralizationperiodsforthePrecambriancopperdepositsinChina,andthemajorcopperdepositswereformedatabout1800Ma;therearethreemineralizationperiodsforgolddepositsformedfromArchaeantoProterozoic.BystudyinghundredsofleadisotopedatafromsomeMesozoiccontinentalsubvolcanicCuandAgpolymetallicdepositsandfine-disseminatedgolddeposits,theauthorsfoundthatthecalculationbasedontheleadsingle-stageevolutionmodelortwo-stageevolutionmodelcannotgivethetrueore-formingagesbutcanprovidemoreinformationaboutmineralizationandmaterialsourcesofthedeposits.

简介：

简介：体积的动态脆弱Zr64Cu16Ni10Al10合金的金属性的玻璃(BMG)被三点的横梁弯曲学习方法。脆弱参数mforZr64Cu16Ni10Al10BMG被计算在高温度是24.5，它意味着液体是一强壮“液体，当时在液体是的工具的低温度是13.4一超级强壮”液体。在supercooled区域的Zr64Cu16Ni10Al10BMG的动态行为经历一对超级强壮的转变强壮。到我们的知识，是第一次strong-to-superstrong转变在金属性的玻璃里被发现。用散布实验的小角度X光，我们发现这转变被假定与在supercooled液体的一个阶段分离过程有关。

简介：Opticalcamouflageisamagicalcapabilityofanimalsasfirstnoticedin1794byErasmusDarwininZoonomia,butcurrentbiomimeticcamouflagestrategiescannotbereadilyappliedincomplexenvironmentsinvolvingmultispectralandinparticularmulti-polarizationdetection.Herewedevelopaplasmonicapproachtowardbroadbandinfraredpolarimetriccrypsis,wherethepolarizedthermalemissionnearthepseudo-Brewsterangleisthemainsignalsourceandnoexistingpolarizingcamouflagetechniquehasbeendiscoveredinnature.Basedonall-metallicsubwavelengthstructures,anelectrodynamicresistance-reductionmechanismisproposedtoavoidthesignificantpolarization-dependentinfraredabsorption/radiation.Itisalsofoundthatthestructuredmetalsurfacepresentsgiantextrinsicanisotropyregardingthephaseshiftbetweenorthogonalpolarizationstates,whichhelpstorealizeultrahigh-efficiencyandtunablepolarizationconversioninanunprecedentedmanner.Finally,wenotethatthecatenaryopticaltheorymayprovideausefulmeanstoexplainandpredicttheseunusualperformances.

简介：Theadvancedfabricationofin-situdendrite/metallicglassmatrix（MGM）compositesisreviewed.Herein,thesemisolidprocessingandBridgmansolidificationaretwomethods,whichcanmakethedendriteshomogeneouslydispersedwithinthemetallicglassmatrix.Uponquasi-staticcompressiveloadingatroomtemperature,almostallthein-situcompositesexhibitimprovedplasticity,duetotheeffectiveblocktothefastpropagationofshearbands.Uponquasi-statictensileloadingatroomtemperature,althoughthecompositespossesstensileductility,theinhomogeneousdeformationandassociatedsofteningdominates.Highvolume-fractioneddendritesandnetworkstructuresmakein-situcompositesdistinguishinglyplasticupondynamiccompression.In-situcompositeexhibitshightensilestrengthandsoftening（necking）inthesupercooledliquidregion,sincethepresenceofhighvolume-fractioneddendriteslowerstherheologyoftheviscousglassmatrixathightemperatures.Atcryogenictemperatures,adistinguishingly-increasedmaximumstrengthisavailable;however,aductile-to-brittletransitionseemstobepresentbyloweringthetemperature.Besides,improvedtension—tensionfatiguelimitof473MPaandfour-point-bendingfatiguelimitof567MPaaregainedforZr58.5Ti14.3Nb5.2Cu6.1Ni4.9Be11.0MGMcomposites.Highvolume-fractiondendriteswithintheglassmatrixinduceincreasedeffectivenessonthebluntingandpropagatingresistanceofthefatigue-cracktip.Thefracturetoughnessofin-situcompositesiscomparabletothoseofthetougheststeelsandcrystallineTialloys.Duringsteady-statecrack-growth,theconfinementofdamagebyin-situdendritesresultsinenhancementofthetoughness.

简介：Wepresentthreecasesofself-expandablemetallicstent（SEMS）placementusingaballoonenteroscope（BE）anditsovertube（OT）formalignantobstructionofsurgicallyreconstructedintestine.ABEiseffectivefortheinsertionofanendoscopeintothedeepbowel.However,SEMSplacementisimpossiblethroughtheworkingchannel,becausetheworkingchannelofBEistoosmallandtoolongforthestentdevice.Therefore,weusedatechniqueinwhichtheBEisinsertedasfarasthestenoticarea;thereafter,theBEisremoved,leavingonlytheOT,andthenthestentisplacedbyinsertingthestentdevicethroughtheOT.Inthepresentthreecases,amodificationofthistechniqueresultedinthesuccessfulplacementoftheSEMSforobstructionofsurgicallyreconstructedintestine,andtheprocedureswereperformedwithoutseriouscomplications.Weconsiderthatthepresentprocedureisextremelyeffectiveasapalliativetreatmentfordistalbowelstenosis,suchasinthesurgicallyreconstructedintestine.

简介：Thedetailsofthespecialthree-dimensionalmicro-nanoscalerippleswithaperiodofhundredsofmicronsonthesurfacesofaZr-basedandaLa-basedmetallicglassirradiatedseparatelybysinglelaserpulseareinvestigated.Weusethesmall-amplitudecapillarywavetheorytounveiltherippleformationmechanismthroughconsideringeachofthemoltenmetallicglassesasanincompressibleviscousfluid.Ageneralizedmodelispresentedtodescribethespecialmorphology,whichfitstheexperimentalresultwell.Itisalsorevealedthattheviscositybringsaboutthebiggesteffectonthemonotonedecreasingnatureoftheamplitudeandthewavelengthofthesurfaceripples.Thegreatertheviscosityis,theshortertheamplitudeandthewavelengthare.

简介：

简介：Awell-dispersedmetallicpalladiumcatalystmodifiedbypolymer-anchoredthioetherligandswasusedforthehydrogenationofcyclopentadienetocyclopentenewithhighactivityandselectivityinambientcondition.Theevidencestoshowthemodificationofcatalyticpropertiesbypolymeranchoredligandsweregiven.