简介：Thispaperinvestigatestheoreticallytheelectronictransmissionspectraofthethreeterminalpyrenemolecularbridgeandthequantumcurrentdistributiononeachbondbythetight-bindingmodelbasedonnonequilibriumGreen'sfunctionandthequantumcurrentdensityapproach,inwhichoneπmolecularorbitalistakenintoaccountpercarbonatomwhentheenergylevelsandHOMO-LUMOgapareobtained.Thetransmissionspectrashowthattheelectronictransmissionofthethreeterminalpyrenemolecularbridgedependsobviouslyontheincidentelectronicenergyandthepyreneeigenenergy.Thesymmetricalandoscillationpropertiesofthetransmissionspectraareillustrated.Anovelplus-minusenergyswitchingfunctionisfound.Thequantumcurrentdistributionshowsthattheloopcurrentsinsidethepyreneareinduced,andsomebondcurrentsaremuchlargerthantheinputandtheoutputcurrents.Thereasonswhytheloopcurrentsandthelargerbondcurrentsareinducedarethephasedifferenceoftheatomicorbitsandthedegeneracyofthemolecularorbits.ThecalculationsillustratethatthequantumcurrentdistributionsareingoodagreementwithKirchhoffquantumcurrentconservationlaw.

简介：Recurrenteventsdatawithaterminalevent(e.g.death)oftenariseinclinicalandobservationalstudies.Mostofexistingmodelsassumemultiplicativecovariateeffectsandmodeltheconditionalrecurrenteventrategivensurvival.Inthisarticle,weproposeageneraladditive-multiplicativeratesmodelforrecurrenteventdatainthepresenceofaterminalevent,wheretheterminaleventstopthefurtheroccurrenceofrecurrentevents.Basedontheestimatingequationapproachandtheinverseprobabilityweightingtechnique,weproposetwoproceduresforestimatingtheregressionparametersandthebaselinemeanfunction.Theasymptoticpropertiesoftheresultingestimatorsareestablished.Inaddition,somegraphicalandnumericalproceduresarepresentedformodelchecking.Thefinite-samplebehavioroftheproposedmethodsisexaminedthroughsimulationstudies,andanapplicationtoabladdercancerstudyisalsoillustrated.

简介：AbstractThetemporaldevelopmentofasinglemodeRayleigh-Taylorinstabilityconsistsofthreestages:thelinear,freefallandterminalvelocityregimes.Thepurposeofthispaperistoreportonnewphenomenaobservedintheapproachtoterminalvelocity.Ournumericalstudyshowsanunexpectednonuniformapproachtoterminalvelocity.Thenonuniformityappliesespeciallytothespikes,whicharefingersofheavyfluidfallingintothelightfluid,butitalsoappliestotherisingbubblesoflightfluid.ForspikesespeciallyourresultscallintoquestionthemeaningfulnessofaterminalvelocityformoderatevaluesoftheAtwoodnumberA.Afterashorttimeperiodofpseudo-terminalplateau,thespikevelocityincreasestoasignificantlyhighermaximum,followedbyadecrease.Thisphenomenaappearstobeduetoaslowevolutionintheshapeofthespikeandbubble.Wefindarelationbetweenthespike(bubble)accelerationandthetipcurvature.Incorrelationwithanincreaseinthespikevelocity,th

简介：ReactionofperfluoroalkyliodideswithaseriesofalkynesundersulfinatodehalogenationconditiongaveamixtureofE/Zadductsveryreadilyinhighyield,thusconstitutedamild,convenientandeffectivenewmethodfortheadditionofperfluoroalkyliodidestoalkynes.Underthesamecon-dition,inthepresenceof1-hexyneperfluoroalkylbromideand1,1,1-trichlorotrifluoroethanereactedonlytogivesulfinatesasthemajorproducts.Aradicalmechanismwasproposedfortheadditionreaction.

简介：Inthispaperweconsiderinfinitehorizonbackwarddoublystochasticdifferentialequations(BDSDEsforshort)coupledwithforwardstochasticdifferentialequations,whoseterminalfunctionsarenon-degenerate.ForsuchkindofBDSDEs,westudytheexistenceanduniquenessoftheirsolutionstakingvaluesinweightedL~p(dx)■L~2(dx)space(p≥2),andobtainthestationarypropertyforthesolutions.

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简介：Thepalladium-salencomplexpalladium(Ⅱ)N,N'-bis{[5-(triphenylphosphonium)-methyl]salicylidene}-l,2-ethanediaminechloridewasfoundtobeahighlyactivecatalystforthecopper-andsolvent-freecouplingreactionofterminalalkyneswithdifferentacylchloridesinthepresenceoftriethylamineasbase,givingexcellentynonesunderaerobicconditions.