简介:Weinvestigatethedynamicsoftwointeractionelectronsconfinedtoone-dimensionalquantumdotarrayinanacelectricfield.Wefindthatinitiallylocalizedelectronswillremainlocalizedintheabsenceofcoulombinteractioniftheratiooftheacfieldmagnitudetothefrequencyisarootoftheordinaryzero-orderBesselfunction.IncontrasttothecasewithoutCoulombinteraction,nomatterwhatthevalueis,theelectronsaredelocalizedandthedelocalizationeffectdependsontheratioU/ωandeaE/ω,whereUisthestrengthofCoulombinteraction,aisthelatticeconstant,andEandωaretheacfieldamplitudeandfrequency,respectively.
简介:Basedonthevariationaltheory,awavelet-basednumericalmethodisdevelopedtocalculatethedefectstatesofacousticwavesintwo-dimensionalphononiccrystalswithpointandlinedefects.Thesupercelltechniqueisapplied.Byexpandingthedisplacementfieldandthematerialconstants(massdensityandelasticstiffness)inperiodicwavelets,theexplicitformula-tionsofaneigenvalueproblemfortheplaneharmonicbulkwavesinsuchaphononicstructurearederived.Thepointandlinedefectstatesinsolid-liquidandsolid-solidsystemsarecalcu-lated.Comparisonsofthepresentresultswiththosemeasuredexperimentallyorthosefromtheplanewaveexpansionmethodshowthatthepresentmethodcanyieldaccurateresultswithfasterconvergenceandlesscomputingtime.
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简介:1.ObjectivesAsabout99%ofthenaturalgashydrate(NGH)resourcesarestoredontheseafloor,itisinevitablethatinitsprocessofexplorationandproduction,therewillbegeohazardssuchasmethaneleakage,seabedsubsidence,ecosystemdamageandevenlandslide.Therefore,asetofintegratedsystemsforenvironmentalmonitoringintheprocessofNGHproductionhasbeenproposedintheconsiderationofenvironmentaldisastersthatmayariseintheprocessofhydrateproduction.
简介:我们学习二维(2D)在吝啬地的模型的事波浪solitons在2D空间与远程的quadrupolequadrupole相互作用(QQI)由电的四极粒子形成了。在空间的2D事波浪solitons的存在用2DGrossPitaevskii方程(GPE)被预言。我们发现QQIsolitons比dipoledipole相互作用(DDI)有一个更高的团(更小的尺寸和更高的紧张)和更强壮的anisotropy在一样的环境参数下面的solitons。在在2D空间的二相同QQIsolitons之间的各向异性的solitonsoliton相互作用被学习。而且,稳定的各向异性的偶极子solitons被观察到我们的知识,第一次在在各向异性的非局部的立方的非线性下面的2D空间。
简介:Thediffusionbehaviordrivenbyboundednoiseundertheinfluenceofacoupledharmonicpotentialisinvestigatedinatwo-dimensionalcoupled-dampedmodel.WiththehelpoftheLaplaceanalysisweobtainexactdescriptionsforaparticle’stwo-timedynamicswhichissubjectedtoacoupledharmonicpotentialandacoupleddamping.Thetimelagisusedtodescribethevelocityautocorrelationfunctionandmeansquaredisplacementofthediffusingparticle.Thediffusionbehaviorforthetimelagisalsodiscussedwithrespecttothecoupleditemsandtheamplitudeofboundednoise.
简介:Thebasicmathematicmodels,suchasthestatisticmodel,thetime-serialmodel,thespatialdynamicmodeletc.,andsometypicalanalysismethodsbasedon3DCMareproposedanddiscussed.Afewtypicalspatialdecisionmakingmethodsintegratingthespatialanalysisandthebasicmathematicalmodelsarealsointroduced,e.g.Visualimpactassessment,dispersionofnoiseimmissions,basestationplanforwirelesscommunication.Inaddition,anewideaofexpectationoffurtherapplicationsandadd-in-valueserviceof3DCMispromoted.Asanexample,thesunshineanalysisisstudiedandsomehelpfulconclusionsaredrawn.
简介:Inthiswork,wereviewthedevelopingprogressoftwo-dimensionalterahertztime-domainspectroscopy(THz-TDS)anditsdiverseapplications,includinganalyzingthepolarizationofTHzradiationfromalaser-inducedplasmasourceandstudyingthecorrespondingphysicalmechanism,andcharacterizingtheopticalpropertiesofcrystals,etc.
简介:Multipleperformancerequirementsneedtobeguaranteedinsomereal-timeapplicationssuchasmultimediadataprocessingandreal-timesignalprocessinginadditiontotimingconstraints.Unfortunately,mostconventionalschedulingalgorithmsonlytakeoneortwodimensionsofthemintoaccount.Motivatedbythisfact,thispaperinvestigatestheproblemofprovidingmultipleperformanceguaranteesincludingtimeliness,QoS,throughput,QoSfairnessandloadbalancingforasetofindependenttasksbydynamicscheduling.Webuildaschedulermodelthatcanbeusedformulti-dimensionalscheduling.Basedontheschedulermodel,weproposeaheuristicmulti-dimensionalschedulingstrategy,MDSS,consistingofthreesteps.Thefirststepcanbeofanyexistingreal-timeschedulingalgorithmthatdeterminestoacceptorrejectatask.Instep2,weputforwardanovelalgorithmMQFQtoenhancetheQoSlevelsofacceptedtasks,andtomakethesetaskshavefairQoSlevelsatthesametime.AnothernewalgorithmITLBisproposedandusedinstep3.TheITLBalgorithmiscapableofbalancingloadandimprovingthroughputofthesystem.ToevaluatetheperformanceofMDSS,weperformextensivesimulationexperimentstocompareMDSSstrategywithMDSRstrategy,DASAPandDALAPalgorithms.ExperimentalresultsshowthatMDSSsignificantlyoutperformsMDSR,DASAPandDALAP.
简介:Localizedmodesinone-dimensional(1D)mediawithuniaxialscatterersthatareassumedtobeorderinspatiallocationbutdisorderinspatialorientationoftheiropticalaxisareinvestigated.Basedontheholisticeffectmodelinrandomlaser,i.e.,therandomlaserisduetotheinteractionofthecomplexlocalizedmodesinactiverandommediawithlocalaperiodicquasi-structurewithappropriatepumplight,aphysicalmodelonthistypeofrandommediaisfound.ItsdisorderdegreeisdefinedbyD=n_o/n_e.Then,thetypicaltransmissionspectrumthroughtherandommediaandthelightfieldintensitydistributioncorrespondingtothedefectmodesinphotonicband-gaparecalculatednumericallybymeansofthetransfermatrixmethod,andtheconditionthatthelocalizedmodeappearsisdiscussed.Resultsshowthatthemediumdisorderplaysanimportantroleindeterminingthelightwavestate.Thelocalizedstateappearswhenthemediumdisorderisstrongenough,andanewmechanismcreatingrandomlaserphenomenonisbroughtforward.
简介:Aturbulentseparation-rcattachmentflowinatwo-dimensionalasymmetricalcurved-walldiffuserisstudiedbyatwo-dimensionallaserdopplervelocimeter.Theturbulentboundarylayerseparatesonthelowercurvedwallunderstrongpressuregradientandthenreattachesonaparallelchannel.Attheinletofthediffuser,Reynoldsnumberbasedonthediffuserheightis1.2×10~5andthevelocityis25.2m/s.There-sultsofexperimentsarepresentedandanalyzedinnewdefinedstreamline-alignedcoordinates.TheexperimentshowsthatafterTransitoryDetachmentReynoldsshearstressisnegativeinthenear-wallbackflowregion.TheircharacteristicsareapproximatelythesameasinsimpleturbulentshearlayersnearthemaximumReynoldsshearstress.AscaleisformedusingthemaximumReynoldsshearstresses.ItisfoundthataReynoldsshearstresssimilarityexistsfromseparationtoreattachmentandtheSchofield-Perryvelocitylawex-istsintheforwardshearflow.Bothprofilesareusedintheexperimentalworkthatleadstothedesignofaneweddy-viscositymodel.ThelengthscaleistakenfromthatdevelopedbySchofieldandPerry.ThecompositevelocityscaleisformedbythemaximumReynoldsshearstressandtheSchofieldPerryvelocityscaleaswellastheedgevelocityoftheboundarylayer.Theresultsoftheseexperimentsarepresentedinthispaper
简介:ThediscreteSobolev’sinequalitiesinL_pnormareprovedforthree-dimensionalsphericalandcylindricalcoordinates,byusingdiscreteHolderinequality.propertyofthetrianglefunctionsandcomplicateddeduction.
简介:Liquidinjection,andfilmformationandtransportindense-phasegas-solidsfluidizedbedsarenumericallysimulatedinthreedimensionsusingacollisionalexchangemodelthatisbasedonthemechanismthatcollisionscausetransferofliquidmass,momentum,andenergybetweenparticles.Inthemodel,eachoftheparticlesisrepresentedbyasolidcoreandaliquidfilmsurroundingthecore.ThemodelisincorporatedintheframeworkofthecommercialcodeBarracuda?developedbyCPFDSoftware.ThecommercialsoftwareisanadvancedCFD-basedcomputationaltoolwheretheparticlesaretreatedasdiscreteentities,calculatedbytheMP-PICmethod,andtrackedusingtheLagrangianmethod.DetailsofthecollisionalliquidtransfermodelhavebeenpreviouslypresentedinO'Rourke,Zhao,andSnider(2009);thispaperpresentsnewcapabilitiesandproof-testingofthecollisionmodelandanewmethodtobetterquantifythepenetrationlength.Examplecalculationsofafluidizedbedwithoutliquidinjectionshowtheexpectedeffectofcollisionsonthereductionofgranulartemperature(fluctuationalkineticenergy)ofthebed.Whenappliedtoliquidinjectionintoadense-phasefluidizedbedunderdifferentconditions,themodelpredictsliquidpenetrationlengthscomparabletotheexperiments.Inaddition,thesimulationrevealsforthefirsttimethedynamicmixingoftheliquiddropletswiththebedparticlesandthetransientdistributionofthedropletsinsidethebed.
简介:Thispaperconsidersamulti-agenttrackingproblemforahigh-dimensionalactiveleaderandvariableinterconnectiontopology.Thestateoftheleadernotonlykeepschangingbutalsomaynotbemeasured.Toestimatethestatesuchaleaderindividually,aneighbor-basedlocalcontrollertogetherwithaneighbor-basedstate-estimationruleisgivenforeachautonomousagent.Then,theauthorsprovethat,withthehelpofaconstructedcommonLyapunovfunction(CLF),eachagentcantracktheactiveleaderwithunmeasurablestates.Finally,theauthorsexplicitlyconstructaCLFforanactiveleaderwithunknownperiodicinputforillustration.
简介:Inthispaper,aprimitiveequationlinearwavemodelisusedtoexaminetheeffectsofthree-dimen-sionalstructureofheatingfieldonthebehaviorofstationaryplanetarywavesinsummerandtocomparetherolesofdifferentheatingfunctionsfortheformationandmaintenanceofsummermonsooncirculationinAsia.Itisshownthatthealoftheatingconnectedwiththelatentheating,especiallythedeepcondensationheatingassociatedwiththecumulusconvectioninlowlatitudes,playsacrucialpartintheAsiansummermon-soonandthestructuresofplanetarywaveresponsesarequitesensitivetotheverticaldistributionofheating.
简介:瞄准:为了检验因素,用一个最近确定的在试管内模型在肠的巨噬细胞(IMAC)的区别包含了。方法:测试是否可溶或膜界限因素induceIMAC区别,刚,elutriated单核白血球(瞬间)与肠的上皮细胞(IEC)的调节媒介或细胞膜被孵化或与在transwell系统的IEC有教养。决定瞬间的活跃迁居的重要性,从瞬间和IEC的1:1混合的三维的总数被免疫组织化学和流动血细胞计数检验。Apoptosis被caspase-3检验西方的污点。在区别模型的细胞外的矩阵生产被免疫组织化学比较。结果:IMAC区别在一个复杂三维的合作文化模型被观察(多细胞的球状体,MCS)与在进球状体的瞬间的移植以后的IEC。由有调节媒介或IEC的膜准备的瞬间的合作文化,没有IMAC区别被导致。有在transwell文化的IEC的瞬间的合作文化,与二个房间,膜也分开的人口没导致瞬间的象肠一样区别。与有在IEC和瞬间的混合MCS入境瞬间的IEC球状体相对照,瞬间的一张仅仅小潜水艇人口能熬过七个天文化时期。结论:瞬间在试管内的象肠一样区别仅仅在三维的MCS在在IMAC的区别期间显示房间矩阵或房间房间相互作用的一个角色的瞬间的移民以后建模的建筑群被导致。