简介：translationitselfisaculture,Thelanguageisacountryculturecarrier,thetranslationofafilmlikefillingaword

简介：Thearticlepresentsanexplicitlystraightforwardformulationofthestationaryanddynamicbehaviourofapressurereliefvalve(PRV).Thisincludesananalyticalsolutionforthestaticp-Q-characteristic,thestepandharmonicresponseandastabilitycriterionusingelementaryoperationsonly.Italsomathematicallyprovestheintrinsicconnectionbetweenthegradientofthestaticp-Q-characteristicandthestability.Thus,thenewmethodoffersfourmainadvantages.

简介：Thispaperstudiesonlineschedulingofjobswithkindreleasetimesonasinglemachine.Here“kindreleasetime”meansthatinonlinesetting,nojobscanbereleasedwhenthemachineisbusy.EachjobJhasakindreleasetimer(J)≥0,aprocessingtimep(J)>0andadeadlined(J)>0.Thegoalistodetermineaschedulewhichmaximizestotalprocessingtime(∑p(J)E(J))ortotalnumber(∑E(J))oftheacceptedjobs.Forthefirstobjectivefunction∑p(J)E(J),wefirstpresentalowerbound√2,andthenprovideanonlinealgorithmLEJwithacompetitiveratioof3.Thisisthefirstdeterministicalgorithmfortheproblemwithaconstantcompetitiveratio.Whenp(J)∈{1,k},k>1isarealnumber,wefirstpresentalowerboundminf(1+k)/k,2k/(1+k)g,andthenweshowthatLEJhasacompetitiveratioof1+┌k┐=k.Inparticular,whenalltheklengthjobshavetightdeadlines,wefirstpresentalowerboundmax{4=(2+k),1}(for∑p(J)E(J))and4/3(for∑E(J)).ThenweprovethatLEJis┌k┐/k-competitivefor∑p(J)E(J)andweprovideanonlinealgorithmHwithacompetitiveratioof2┌k┐/(┌k┐+1)forthesecondobjectivefunction∑E(J).

简介：Atemperature-inducedspinreorientationtransitionbetweenГ4(Gx,Ay,Fz)andГ2(Fx,Cy,Gz)hasbeenstudiedinthefamilyofEr1–xYxFeO3(x=0,0.25,0.5,0.75,1)singlecrystals.BydopingnonmagneticY3+,wetunedthespinreorientationtemperaturetolowtemperaturewithincreasingx.Moreover,thetypicalcompensationpointandspinfliptransitionofErFeO3alsodecreaseswithdoping,anddisappearsabovex=0.75.WealsoreporttheRietveldrefinementsandRamanspectroscopyofEr1–xYxFeO3,wheresomeRamanpeaksareshiftedtolowfrequencywithincreasingdoping.Ourresultsshedlightontheunderstandingoftheinteractionbetweentwomagneticsub-latticesofrareearth(R3+)andiron(Fe3+)ions,andwillalsocontributetothematerialsdesignandpotentialapplications.

简介：Understandingofcharge/energyexchangeprocessesandinterfacialinteractionsthatoccurbetweenquantumdots(QDs)andthemetaloxidesisofcriticalimportancetotheseQD-basedoptoelectronicdevices.Thisworkreportsonlineardipolebehaviorofsinglenear-infraredemittingCdSeTe/ZnScore/shellQDswhichareencasedinindiumtinoxide(ITO)semiconductorlianoparticlesfilms.Astrongpolarizationanisotropyinphotohiminescenceemissionisobservedbydefocusedwide-fieldimagingandpolarizationmeasuremen11echniques,andtheaveragepolarizationdegreeisupto0.45.Apossiblemechanismfortheobservationispresentedinwhichtheelectrons,locatingatsingleQDsurfacefromITObyelectrontransferduetotheequilibrationoftheFermilevels,resultinasignificantStarkdistortionoftheQDelectron/holewavefunctions.TheStarkdistortionresultsinthelinearpolarizationpropertyofthesingleQDs.TheinvestigationoflineardipolebehaviorforsingleQDsencasedinITOfilmswouldbehelpfulforfurtherimprovingQD-baseddeviceperformance.

简介：Wereportonadiode-end-pumpedhigh-powerandhigh-energyNd:YAGsingle-crystalfiberlaserat1834nm.Two808nmdiodesinjectingabout58WpumppowerintotheNd:YAGfiberhavegenerated3.28Wcontinuouswaveand1.66WCr:ZnSe-basedpassivelyQ-switchedlasers.Slopeefficiencieswithrespecttopumppowersare8.7%forthecontinuous-wavelaserand4.9%fortheQ-switchedlaser.Theextractedmaximumpulseenergyisabout266.9μJ,andthecorrespondingmaximumpulsepeakpoweris2.54kW.Theseperformancesgreatlysurpasspreviousresultsregardingthisspecificlaseremissionbecausethelasergainmediumintheformoffibercansignificantlymitigatethermallyinducedpowersaturationthankstoitssignificantlyreducedthermallensingeffect.Single-crystalfiberlasersshowgreatpotentialforhighaveragepower,pulseenergy,andpeakpower.

简介：InGaAs/InPavalanchephotodiodestypicallyworkinthegatedGeigermodetoachievenear-infraredsinglephotondetection.Byusingultrashortgatesandcombiningwiththerobustspike-cancelingtechniquethatconsistsofthecapacitance-balancingandlow-passfilteringtechnique,wedemonstrateanInGaAs/InPsingle-photondetector(SPD)withwidelytunablerepetitionratesinthispaper.Theoperationfrequencycouldbetunedconvenientlyfrom100MHzto1.25GHzwiththeSPD’sperformancemeasuredtomaintaingoodperformance,makingitquitesuitableforquantumkeydistribution,laserranging,andopticaltimedomainreflectometry.Furthermore,theSPDexhibitedextremelylow-noisecharacteristics.ThedetectionefficiencyofthisSPDcouldreach20%withthedarkcountrateof2.5×10-6∕gateandafter-pulseprobabilityof4.1%at1GHz.

简介：AnoverlaycoatingmaterialwasdepositedonasinglecrystalsuperalloySRR99bylasercladding.Themicrostructureandoxidationbehaviorofthiscoatingwasinvestigatedthroughscanningelectronmicroscopy(SEM)andX-raydiffraction(XRD).Theresultsindicatedthatalthoughthecompositionofthecoatingwaschosenbasedontheγ'compositioninReneN5superalloy,theprimarysolidificationphaseofthiscoatingduringlasercladdingwasγ-Ni.Furthermore,underthelasercladdingcondition,fineparalleldendritesgrewepitaxiallyinthecoatingfromthesubstrate,indicatingthesinglecrystalstructureofthesubstratewasreproduced.WhenthesinglecrystalMCrAlYcoatingwasoxidizedat1000,bothB-AI2O3and(Y-Al2O3formedduringinitialoxidationprocess.Astheoxidationtimeproceeded,thepreseneeof0-Al2O3facilitatedtheformationofNiAl2O4spineloxide.Oncethespinelwasobserved,itflourishedandinducedsomeporosityinthescale.Whenthescalethicknessincreasedto6-7μm,largeareaspallationofthescalebegan.

简介：Thermoelectricityisatherrnorelatedpropertythatisofgreatimportanceinsingle-moleculejunctions.Theelectricalconductance(σ),electron-derivedthermalconductance(kel)andSeebeckcoefficient(S)ofBgo-basedsingle-moleculejunctionsareinvestigatedbyusingdensityfunctionaltheoryincombinationwithnon-equilibriumGreen'sfunction.Whenthedistancebetweentheleft/rightelectrodesis11.4A,therelationshipbetweenσandkelobeystheWiedemann-FranzlawverywellbecauseofthestronghybridizationbetweenB80molecularorbitalsandthesurfacestatesofAuelectrodes.Furthermore,thecalculatedLorenznumberisclosetothefamousvalueinmetalordegeneratesemiconductors.Inaddition,Sisonly—19.09μV/Kat300K,thusleadingtothesmallerelectron'sthermoelectriefigureofmerit(ZeiT=S^2σT/Kel).Interestingly,thestrainandchemicalpotentialcanmodulateB80-basedsingle-moleculejunctionsfromn-typetop-typewhenthecompressivestrainreaches—0.6Aorthechemicalpotentialshiftsto—0.16eV.ThismightbeattributedthatSreflectstheasymmetryintheelectricalconductancewithrespecttothechemicalpotentialandisproportionaltotheslopesofthetransmissionspectrum.

简介：WehavesynthesizedandinvestigatedphysicalpropertiesoftwonewquaternarycompoundsGd2CoAl4T2(T=Si,Ge)singlecrystals,whichareisostructuraltoTb2NiAl4Ge2andEr2CoAl4Ge2.Themostimportantstructuralfeatureofthesematerialsistheanti-CaF2-typeCoAl4T2slabs.Thesematerialsshowmetallicbehaviorbelow300Kandthereisalong-rangeantiferromagnetic(AFM)transitionappearingat20and27KforGdCoAl4Ge2andGd2CoAl4Si2,respectively.ResistivityandheatcapacitymeasurementsalsoconfirmthesebulkAFMtransitions.Furtheranalysisindicatesthatthislong-rangeantiferromagnetismshouldresultfromthemagneticinteractionbetweenlocalmomentsofGd^3+ions.

简介：Three-dimensional-printed(3D-P)titaniumimplantsdisplaymanyadvantages,suchasdesignflexibility,higherefficiency,thecapabilitytoeasilyconstructcomplexorcustomizedstructures,etc.,andisbelievedtopotentiallyreplacetraditionalimplants.However,thebiologicalperformanceofthe3D-Ptitaniumsurfacehasnotbeeninvestigatedsystematically.Herein,weanalyzedthesurfacecharacteristicsof3D-PTi6AI4Vimplantsandevaluatedthebiologicalresponsesofbonemarrowderivedmesenchymalstromalcells(BMSCs)tothe3D-Psurfaceinvitro.Moreover,afterimplantationintotheratfemoralcondylefor3and6weeks,theosseointegrationperformaneewasevaluated.Theresultsshowedthe3D-PTi6Al4Vimplantpresenteddistinctfluctuantmacroscaleroughsurfaceandrelativelybetterhydrophilicitywhichenhancedtheadhesion,proliferation,osteogenicdifferentiationandangiogeneticfactorexpressionofBMSCs.Moreover,theinvivoosseointegrationperformancewasalsobetterthanthatofthecontrolgroupattheearlystage.Thepresentstudysuggestedthe3D-Ptitaniumalloyisapromisingcandidatetobeusedasimplantmaterial.