简介:ThispaperinvestigatestherelationshipbetweenstatefeedbackandHamiltonicanrealization.Firest,itisprovedthatacompletelycontrollablelinearsystemalwayshasastatefeedbackstateequationHamiltonianrealization.NecessaryandsufficientconditionsareobtainedforittohaveaHamiltonianrealizationwithnaturaloutput.ThensomeconditionsforanaffinenonlinearsystemtohaveaHamiltonianrealizationaregiven.someconditionsforanaffinenonlinearsystemtohaveaHamiltonianrealizationaregiven.Forgeneralizedoutputs,theconditionsofthefeedback,keepingHamiltonian,arediscussed.Finally,theadmissiblefeedbackcontrolsforgeneralizedHamiltoniansystemsareconsidered.
简介:使用one-day-arc由覆盖的轨道集成n-days-arc的算法详细被讨论。一个例子被给,它证明轨道集成方法能高效地改进轨道的精确,特别在一个本地区域的轨道的决心。IGS出版的轨道是七个IGS分析中心(代码,EMR,ESA,GFZ,JPL,NGS,和SIO)的综合结果独立结果。因为one-day-arc的末端的效果,在两个的错误轨道的终端由比较,和轨道经常是更大的每天是不连续的。改进轨道的质量,把one-day-arc集成到n-days-arc并且提供w-days-arc的中间的节让n-analysis-center的集成获得精确IGS的每分析中心需要转。通常,由轨道集成方法的轨道的中间的节比由one-day-arc方法有更高的精确性。这块研究地仍然在在中国的基本阶段。
简介:<正>HomogeneousandinhornogeneousdifferentialrealizationsoftheOSP(2,1)superalgebraonthespacesofhomogeneousandinhomogeneouspolynomialsandthecorrespondingboson-fermioiirealizationsarestudied.ThenewindecomposableandirreduciblerepresentationsoftheOSP(2,1)aregivenonsubspacesandquotientspacesoftheuniversalenvelopingalgebrasofHeisenberg-Weylsuperalgebra.AllthefinitedimensionalirreduciblerepresentationoftheOSP(2,1)superalgebraisnaturallyobtainedasspecialcases.
简介:Thechemicaloxygen–iodinelaser(COIL)istheshortest-wavelengthhigh-powerchemicallaserthathasbeendemonstrated.Thecharacteristics,suchasgoodatmosphericpropagation,shortwavelengthandexcellenttransmissionthroughopticalfibers,maketheCOILagoodcandidateforhigh-powerlaserapplication.TomodelthecompleteCOILlasinginteraction,athree-dimensionalformulationofthefluiddynamics,speciescontinuityandradiationtransportequationsisnecessary.Thecomputationalefforttocalculatetheflowfieldovertheentirenozzlebankwithagridfineenoughtoresolvetheinjectionholesissolargeastoprecludedoingthecalculation.Theapproachtomodelingchemicallasersthenhasbeentoreducethecomplexityofthemodeltocorrespondtotheavailablecomputationalcapability,addingdetailsascomputingpowerincreased.ThemodelingoflasingintheCOILmediumisproposed,whichiscouplingwiththeeffectsinducedbytransverseinjectionofsecondarygases,non-equilibriumchemicalreactions,nozzletailflowandboundarylayer.ThecoupledsteadysolutionsofthefluiddynamicsandopticsinaCOILcomplexthree-dimensionalcavityflowfieldareobtainedfollowingtheproposal.Themodelingresultsshowthattheseeffectshavesomeinfluenceonthelasingproperties.Afeasiblemethodologyandatheoreticaltoolareofferedtopredictthebeamqualityforlarge-scaleCOILdevices.
简介:Realisticsimulationofunderwatersceneisalwaysdifficultbecauseofthespecialandcomplexvisioneffectsinunderwaterspace.Seabedisanimportantpartofunderwaterenvironment.ThispaperdescribesthemethodsforseabedscenesimulationbasedonOpenGL.Itincludesconstructionoffluctuantterrainbasedontherandomsinusoidalalgorithm,simulationofseabedflickereffectbymeansofcirculartexturemappingandgenerationofturbidityeffectbyusingfogtechniques.Fortheapplicationbasedontheleadinghighlevel3Ddevelopmentenvironment-Vega,underwaterscenesimulationisstilladifficultysincethereisnomoduleforit.BasedontheanalysisofVegasoftwareandtheresearchonseabedscenesimulationmethods,aVegaextendingmodulenamed'UnderwaterSpace'wascreatedthroughdevelopingmoduleclassandextendinglynxinterface.ThemoduleclasswasdesignedthroughdevelopingDLLwritteninC++.TheLynxwasextendedthroughdevelopingkeywordconfigurefile,GUIconfigurefileandlynxplug-inDLL.TheproblemthatVegacan'tsimulateunderwaterspace,iselementarilyresolved.Theresultsshowthatthismoduleisefficient,easyusing,andtheseabedsceneimagesarevivid.
简介:ThroughthepracticeofdevelopinganexpertsystemFBCDES(FeedBoxConceptualDe-signExpertSystem)fortheplanomillingmachineinCIMSERC(CIMSEngineeringResearchCenter)inChina,thepaperintendstointroduceacommonproblem-solvingstrategyforthemechanicalproductconceptualdesignexpertsystem.Meanwhilesomeproblemssuchassystemarchitecture,knowledgerepresentationsandinferenceenginesetsarealsodescribed.Ayetmoredetaileddiscussionisgiventothetechnicalproblemsforrealizingtwokeymodules,thatisconceptdesignmoduleandlayoutmodule.
简介:Internethasgraduallydemonstratedmoreandmoresuperiorityinmoderneducationsystem.Theintelligentonlinedrawingplatformbasedonnetwillprovidelearnerswithastudyingenvironmentwithoutlimitationintimeandspace.Basedonthetheoryofgraphics,thispaperdevelopedanintelligentonlinedrawingplatform(IODP)withJavathroughanalyzingtheteachingcharacterofdescriptivegeometry.IODPdevelopednotonlyhasaflexibledrawingenvironmentwiththefunctionofmutualdrawing,butalsoisabletojudgethedrawingmadebystudentsandgivefeedbackatthesametime.ThisplatformgivesaneffectivewayforInterneteducationonengineeringgraphics.
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简介:Previously,anovelclassifiercalledKernel-basedNonlinearDiscriminator(KND)wasproposedtodiscriminateapatternclassfromotherclassesbyminimizingmeaneffectofthelatter.Toconsidertheeffectofthetargetclass,thispaperintroducesanobliqueprojectionalgorithmtodeterminethecoefficientsofaKNDsothatitisextendedtoanewversioncalledextendedKND(eKND).IneKNDconstruction,thedesiredoutputvectorofthetargetclassisobliquelyprojectedontotherelevantsubspacealongthesubspacerelatedtootherclasses.Inaddition,asimpletechniqueisproposedtocalculatetheassociatedobliqueprojectionoperator.ExperimentalresultsonhandwrittendigitrecognitionshowthatthealgorithmperformesbetterthanaKNDclassifierandsomeothercommonlyusedclassifiers.
简介:Duetolowparametersensitivityforbalancedrealizations,balancedstructurebecomesagoodcandidateforanstatespaceadaptiveinfiniteimpluseresponse(MR)filter.Here,usingcoefficientsofthetransferfunctionastheadaptivefilteringparameters,abalancedadaptiveIIRfilteringalgorithmisproposedforoutput-errorminimization.ThealgorithmintheinternallybalancedrealizationguaranteesthattheadaptiveIIRfilteralwaysminimizestheratioofmaximum-to-minimumeigenvalueoftheGrammianmatricesattheeachiteration.Simulationresultsareprovidedtocorroboratetheproposedalgorithm.
简介:Thisyearmarksthe70thanniversaryoftheanti-Fascistwar,andtherighttodevelopmentisalsobornduringthewar.Inotherwords,therighttodevelopmentisaproductofthestruggleofdevelopingcountriestobreaktheoldinternationalorder.Therefore,tostudytherighttodevelopmentisofprofoundandrealisticsignificanceforhumanrightsprotection.Theauthorwillstartfromthemeaningoftherighttodevelopment,tracethecourseofitsformationandevolution,andthenbytakinghistoryasamirror,discusstherealizationandprotectionoftherighttodevelopment,proposesomerelevantsuggestions,soastopromotethedevelopmentofanewinternationalorderandmeetthenewrequirementsofglobalization.
简介:Sincethe18thNationalCongressoftheCommunistPartyofChina,GeneralSecretaryXiJinpinghasissuedaseriesofimportantexpositionsonpeaceanddevelopment,whoseimpactisincreasinglyimportantforthecurrentprocessofglobalgovernance.XihaspointedoutthatChinesecivilizationhasupheldharmonyinhandling
简介:Near30yearsaftertheadoptionofthe1986UNDeclarationontheRighttoDevelopment,understandingofthisRightstilldiffersfromonepoliticalgrouptoanother.TheSouthstressesissuessuchasinequalitiesintheinternationalfinancialsystem,greaterparticipationofdevelopingcountriesinglobaldecision-makingoneconomicpolicy,andpromotingafairertraderegime.TheNorthpersistsonaptdomesticconditionsindevelopingcountriessuchasruleoflaw,goodgovernance,democracyandresponsibleeconomicmanagement.AndwhiletheNonAlignedMovementcallsforaninternationallegalstandardofabindingnature,theEuropeanUnionisopposedtosuchanupgradeoftheDeclaration.Infact,draftingaFrameworkConventionontheRighttoDevelopmentseemstobethebestoptionforaccommodatingtheconcernsofthedifferentpoliticalgroups,asitallowsforastep-by-stepapproach.Aframeworkconventionisatreatyunderinternationallaw:suchatreatyisopentoStates,andonceithasenteredintoforce,itisbindingonStatesthathaveexpressedconsent.ThepotentialaddedvalueofaFrameworkConventionontheRighttoDevelopmentistobalancethecurrenthumanrightsregimewithatreatythatgoesbeyondindividualStateresponsibilityandtakesinspirationfromprinciplesderivedfrominternationaldevelopmentefforts,suchasmutualaccountability,alignmentofpoliciesamongpartnercountries,andinclusivepartnerships.