简介：Nanocarbonmaterialsplayacriticalroleinthedevelopmentofneworimprovedtechnologiesanddevicesforsustainableproductionanduseofrenewableenergy.Thisperspectivepaperdefinessomeofthetrendsandoutlooksinthisexcitingarea,withtheeffortofevidencingsomeofthepossibilitiesofferedfromthegrowinglevelofknowledge,astestifiedfromtheexponentiallyrisingnumberofpublications,andputtingbasesforamorerationaldesignofthesenanomaterials.Thebasicmembersofthenewcarbonfamilyarefullerene,graphene,andcarbonnanotube.Derivedfromthemarecarbonquantumdots,nanohorn,nanofiber,nanoribbon,nanocapsulate,nanocageandothernanomorphologies.Secondgenerationnanocarbonsarethosewhichhavebeenmodifiedbysurfacefunctionalizationordopingwithheteroatomstocreatespecifictailoredproperties.Thethirdgenerationofnanocarbonsisthenanoarchitecturedsupramolecularhybridsorcompositesofthefirstandsecondgenerationnanocarbons,orwithorganicorinorganicspecies.Theadvantagesofthenewcarbonmaterials,relatingtothefieldofsustainableenergy,arediscussed,evidencingtheuniquepropertiesthattheyofferfordevelopingnextgenerationsolardevicesandenergystoragesolutions.

简介：Inthemidseventiesanewpropulsorforaircraftwasdesignedandinvestigated-theso-calledPROPFAN.Withregardtothetotalpressureincrease,itrangesbetweenaconventionalpropellerandaturbofanwithveryhighbypassratio.Thisnewpropulsionsystempromisedareductioninfuelconsumptionof15to25%comparedtoenginesatthattime.Alotofpropfans(HamiltonStandard,USA)withdifferentnumbersofbladesandbladeshapeshavebeendesignedandtestedinwindtunnelsinordertofindanopimuminefficiency,Fig.1.ParalleltothisdevelopmentGE,USA,madeadesignofacounterrotatingunductedpropfan,theso-calledUDF,Fig.2.Aprototypeenginewasmanufacturedandinvestigatedonanin-flighttestbedmountedattheMD82andtheB727.Sincethattimetherehasnotbeenanyfurtherdevelopmentofpropfans(exceptAN70withNK90-engineUkraine,whichismoreorlessapropellerdesign)duetorelativelylowfuelpricesandtechnicalobstacles.Onlytechnicalprogramsindiferentcountriesarestillgoingoninordertoprepareadatabasefordesigningcounterrotatingfansintermsofaeroacoustics,aerodynamicsandaeroelasticities.InDLR.Germany,alotofexperimentalandnumericalworkhasbeenundertakentounderstandthephysicalbehaviouroftheunsteadyflowinacounterrotatingfan.

简介：HL-2Adataacquisitionsystem(DAS)wasdevelopedandusedinengineeringtestslastyear.Themainpartsofthesystemincludetheexperimentnetwork,thedataacquisitionandprocessingmechanisms,andthegraphandcharacterdisplayequipments.

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简介：最小的dilaton模型(MDM)由叫的dilaton和dilaton顶夸克搭挡把t'称为的一汗衫数量扩大标准模型。在这个工作，我们调查t'-induced放射的修正到Higgs-strahlung生产过程e+在未来Higgs的eZh工厂。我们首先详细介绍分析计算并且显示出怎么处理紫外分叉。然后，我们由从精确electroweak数据考虑限制数字地计算修正。我们发现那，为罪恶L=0.2并且mt'=1200GeV，修正是0.26%和2.1%为，1TeV分别地，并且更大的价值能作为罪恶L增加。

简介：Reversewatergasshift（RWGS）reactioncanbeservedasapivotalstageoftransitioningtheabundantCO2resourceintochemicalsorhydrocarbonfuels,whichisattractivefortheCO2utilizationandofeventuallysignificanceinenablingarebuiltecologicalsystemforunconventionalfuels.Thisconceptisappealingwhentheprocessisconsideredasasolutionforthestorageofrenewableenergy,whichmayalsofindavarietyofpotentialendusesfortheouterspaceexploration.However,abigchallengetothisissueistherationaldesignofhightemperatureendurableRWGScatalystswithdesirableCOproductselectivity.Inthiswork,wepresentacomprehensiveoverviewofrecentpublicationsonthisresearchtopic,mainlyfocusingonthecatalyticperformanceofRWGSreactionoverthreemajorkindsofheterogeneouscatalysts,includingsupportedmetalcatalysts,mixedoxidecatalystsandtransitionmetalcarbides.Thereactionthermodynamicanalysis,kineticsandmechanismsarealsodescribedindetail.Thepresentreviewattemptstoprovideageneralguidelineabouttheconstructionofwell-performedheterogeneouscatalystsfortheRWGSreaction,aswellasdiscussingthechallengesandfurtherprospectsofthisprocess.

简介：Thelittle-Higgsmodelstypicallycontainanewvector-liketopquarkT,whichplaysakeyroleinbreakingtheelectroweaksymmetry.InthecontextofthelittlestHiggs(LH)model,westudysingleproductionofthiskindofnewparticlesviatheprocessep→eb→veTinthefuturelinac-ring-typeepcollider(LCО×LHC).Wefindthattheproductioncrosssectionisintherangeof1.2×10^-40.48pbattheLCО×LHCwith√s=3.7TeV.

简介：为了在impellers压制成穴并且做涡轮泵，更长生活，inducer与主要impeller被分开，两impellers独立地被驾驶。在impellers附近的泵和流动条件的表演试验性地被调查，下列结果被获得。(1)主要impeller贡献在inducer和主要impeller之间的流动相互作用。(2)两impellers的旋转速度能独立地被控制以便同时总体上压制成穴不仅impeller，而且在inducer。