简介：Inthiswork,syngasmethanationoverNi-W/TiO2-SiO2catalystwasstudiedinafluidized-bedreactor(FBR)anditsperformancewascomparedwithafixed-bedreactor(FIXBR).Theeffectsofmainoperatingvariablesincludingfeedstockgasesspacevelocity,cokecontent,bedtemperatureandsulfur-tolerantstabilityof100hlifewereinvestigated.ThestructureofthecatalystswascharacterizedbyXRD,N2adsorptiondesorptionandTEM.Itisfoundthatundersamespacevelocityfrom5000h1to25000h1FBRgaveahigherCH4yield,lowercokecontent,andlowerbedtemperaturethanthoseobtainedinFIXBR.Ni-W/TiO2-SiO2catalystpossessedexcellentsulfur-tolerantstabilityonthefeedstockgaseslessthan500ppmH2SinFBR.ThecarbondepositsformedonthespentcatalystwereintheformofcarbonfibersinFBR,whileintheformofdenseaccumulationdistributionappearanceinFIXBR.

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简介：JUNA(JinpingUndergroundlaboratoryforNuclearAstrophysics)isplaningtomeasurethe13C(α,n)16OandsomeotherimportantreactionsatorclosetostellarenergiesusingintenseheliumbeamoutofanECRdrivenacceleratorinJinpingUndergroundlaboratory[1].Deuteriumimpurityinionsourcewillproducessignificantamountofneutrons,limitingthebackgroundlevel.Tocontrolthedeteriumimpurity,wehavedevelopedamethodtomeasurethedeuteriumimpuritywithinHeliumbeamusingthed(d,p)treaction.

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简介：Probingtheopticalpropertiesofmolybdenumdisulfide（MoS2）isvitaltoitsapplicationinplasmon-enhancedspectroscopy,catalysts,sensing,andoptoelectronicdevices.Inthispaper,wetheoreticallystudiedtheRamanandfluorescencepropertiesofmonolayerMoS2usingtip-enhancedspectroscopy（TES）.Inthestrong-couplingTESsystem,theRamanandfluorescenceenhancementfactorscanbeturnedtoashighas4.5×108and3.3×103,respectively,byoptimizingthetip–MoS2-filmdistance.OurtheoreticalresultsnotonlyhelptodeeplyunderstandtheTESpropertiesofmonolayerMoS2,butalsoprovidebetterguidanceontheapplicationsofthenoveltwo-dimensionalmaterial.

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简介：Asafundamentalpropertyofnuclei,atomicmassesarewidelyusedinmanydomainsofscienceandengineering.Areliableatomicmasstablederivedfromtheexperimentaldata,wheretheatomicmassesandtherelevantexperi-mentalinformationcanbefoundconveniently,isinhighdemandbytheresearchcommunity.Tomeetthedemands,theAtomicMassEvaluation(AME)wasinitiatedin1950'sandaseriesofAMEmasstableshavebeenpublishedeversince.CurrentlytheAMEservestheresearchcommunitybyprovidingthemostreliableandcomprehensiveinformationrelatedtotheatomicmasses.ThenewatomicmassevaluationAME2016waspublishedintheMarchissueofChinesePhysicsCastwocom-plementarypapers[1;2].

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简介：134Csabranchingpointins-processpathwhichisshowninFig.1.Thebranchingratioisdefinedasfβ=λβ/(λβ+λn).Itcouldbededucedfromtheabundanceof134Baand136Basince136Bagoesthroughbothdecayandneutroncaptureof134Cswhile134Baonlyexperiencesdecaychannel[1].Duetoboth134Baand134Baarepures-processnuclei,thisbranchingpointisagoodapproachtodeterminethes-processparameters.Withtemperaturedependentβ-decayrateof134Cs,thetemperatureofs-processcouldbededuced.

简介：Multimediastreamingservedthroughpeer-to-peer(P2P)networksisboomingnowadays.However,theend-to-endstreamingqualityisgenerallyunstableduetothevariabilityofthestateofserve-peers.Ontheotherhand,proxycachingisabandwidth-efficientschemeforstreamingovertheInternet,whereasitisasubstantiallyexpensivemethodneedingdedicatedpowerfulproxyservers.Inthispaper,wepresentaP2PcooperativestreamingarchitecturecombinedwiththeadvantagesofbothP2Pnetworksandmultimediaproxycachingtechniquestoimprovethestreamingqualityofparticipatingclients.Inthisframe-work,aclientwillsimultaneouslyretrievecontentsfromtheserverandotherpeersthathaveviewedandcachedthesametitlebefore.Inthemeantime,theclientwillalsoselectivelycachetheaggregatedvideocontentsoastoservestillfutureclients.Theassociateprotocoltofacilitatethemulti-pathstreamingandadistributedutility-basedpartialcachingschemearedetailedlydis-cussed.Wedemonstratetheeffectivenessofthisproposedarchitecturethroughextensivesimulationexperimentsonlarge,Inter-net-liketopologies.

简介：HL-2Atokamak(majorradiusR=165cm,minorradiusα=38-45cm)wassuccessfullyachievedsingle-nulldivertordischargewithgoodcontrolloftheplasmacurrentandpositioninexperiment.Parametersachievedinthiscompaignwereasfollows:toroidalmagneticfieldBT=1.4T,plasmacurrentIp=168kA,plasmaelectrondensityne=1.7×10^19/m^3,plasmaexisttimetp=920ms.

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简介：AnelectroncyclotronresonanceheatingsystemwillbeconstructedinthenearfutureforECHandECCDinvestigationonHL-2Atokamak.ThenewECRHsystemwillprovideHL-2Awithapowercapabilityof1MWfor1satfrequencyof70GHz.Consequently,itisveryimportanttochooseasuitablegyrotronandsomecomponentsforHL-2AECRHsystem.

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简介：HfO2榆树被电子横梁蒸发在BK7玻璃底层上扔。在剩余压力和HfO2电影的结构上在100度C和400度C之间退火的影响被学习。系列，剩余压力和结构的小差别在在更低的温度退火以后被获得，这被发现。在在更高的温度退火以后，系列变到短波长，有增加退火的剩余压力增加温度。同时，雏晶尺寸增加，interplanardistance减少。光系列和剩余应力的变化对应于退火导致的结构的进化。

简介：ReducingtheanthropogenicCO2emissionsfromfossilresourcecombustionandhumanactivitieshasbecomeoneofthemajorchallengeswearefacingtoday.BeyondthosepracticalapplicationsfortheutilizationofCO2,suchasthesynthesisofsalicylicacid,methanol,urea,NaHCO3-Na2CO3chemicalsandrecentlydevelopedpolycarbonatesynthesis,scientistsarestillseekingnewmaterialsandtechnologiesforefficientcapture,

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