简介：AnadaptiveinternalmodecontrolisproposedtoeliminateeffectivelyperiodicdisturbancewithuncertainfrequencycausedbyinputerrorangleofPIGA(PendulousIntegratingGyroAccelerometer).Anadaptivealgorithmwithperiodicdisturbancefrequencyidentificationonlineisappliedandtheinternalmodelcontrollerparametersareadjustedtoeliminatedisturbance.Thentheconvergenceofthisalgorithmandthestabilityofthesystemareprovedbytheaveragingmethod.SimulationresultsverifytheproposedschemecaneliminateperiodicdisturbanceandimprovethetestprecisionforPIGAeffectively.

简介：Thesurface-relatedmultipleelimination(SRME)methodisbasedonfeedbackformulationandhasbecomeoneofthemostpreferredmultiplesuppressionmethodsused.However,somedifferencesareapparentbetweenthepredictedmultiplesandthoseinthesourceseismicrecords,whichmayresultinconventionaladaptivemultiplesubtractionmethodsbeingbarelyabletoeffectivelysuppressmultiplesinactualproduction.ThispaperintroducesacombinedadaptivemultipleattenuationmethodbasedontheoptimizedeventtracingtechniqueandextendedWienerfiltering.ThemethodfirstlyusesmultiplerecordspredictedbySRMEtogenerateamultiplevelocityspectrum,thenseparatestheoriginalrecordtoanapproximateprimaryrecordandanapproximatemultiplerecordbyapplyingtheoptimizedeventtracingmethodandshort-timewindowFKfilteringmethod.AfterapplyingtheextendedWienerfilteringmethod,residualmultiplesintheapproximateprimaryrecordcanthenbeeliminatedandthedamagedprimarycanberestoredfromtheapproximatemultiplerecord.ThismethodcombinestheadvantagesofmultipleeliminationbasedontheoptimizedeventtracingmethodandtheextendedWienerfilteringtechnique.Itisanidealmethodforsuppressingtypicalhyperbolicandothertypesofmultiples,withtheadvantageofminimizingdamageoftheprimary.Syntheticandfielddatatestsshowthatthismethodproducesbettermultipleeliminationresultsthanthetraditionalmulti-channelWienerfiltermethodandismoresuitableformultipleeliminationincomplicatedgeologicalareas.

简介：Inthispaper,anoveladaptivemeshσcoordinatemodelisproposedforthestudiesofWaveandStructureInteraction(WSI).Themodelisvalidatedbyusingthecaseofasolitarywavemovementinanopenchannelwithconstantwaterdepthandthecaseofnonbreakingsolitarywavepropagatingoverastep.NumericalresultsagreewellwiththeanalyticalsolutionsobtainedbasedontheBoussinesqtheory,thelaboratorydataandothernumericalmodelresults.Theproposedmodelisthenusedtostudyasolitarywaveinteractingwithasuspendedfixedstructure.

简介：AnovelH_∞tracking-baseddecentralizedindirectadaptiveoutputfeedbackfuzzycontrollerforaclassofuncertainlarge-scalenonlinearsystemsisdeveloped.Byvirtueoftheproperfilteringoftheobservationerrordynamics,theobserver-baseddecentralizedindirectadaptivefuzzycontrolschemeispresentedforaclassoflarge-scalenonlinearsystemsusingthecombinationofH_∞trackingtechnique,afuzzyadaptiveobserverandfuzzyinferencesystems.Theoutputfeedbackandadaptationmechanismsarebothrobustandimplementableindeedowingtotheirfreedomfromtheunavailableobservationerrorvector.Allthesignalsoftheclosed-looplargescalesystemareguaranteedtostayuniformlyboundedandtheoutputerrorstakeonH_∞trackingperformance.Simulationresultssubstantiatetheeffectivenessoftheproposedscheme.

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简介：Thispaperdealswiththevectorcontrol,includingboththedirectvectorcontrol(DVC)andtheindirectvectorcontrol(IdVC),ofinductionmotors.ItiswellknownthattheestimationofrotorfluxplaysafundamentalroleintheDVCandtheestimationofrotorresistanceisvitalintheslipcompensationoftheIdVC.Intheseestimations,theprecisionissignificantlyaffectedbythemotorresistances.Therefore,onlineestimationofmotorresistancesisindispensableinpractice.Forafastestimationofmotorresistances,itisnecessarytoslowdowntheconvergencerateofthecurrentestimate.Ontheotherhand,forafastestimationoftherotorflux,itisnecessarytospeedupitsconvergencerate.Itisverydifficulttorealizesuchatrade-offinconvergenceratesinafullorderobserver.Inthispaper,weproposetodecouplethecurrentobserverfromthefluxobserversoastorealizeindependentconvergencerates.Then,theresistanceestimationalgorithmisappliedtobothDVCandIdVC.Inparticular,intheapplicationtoIdVCthefluxobserverneedsnotbeused,whichleadstoasimplerstructure.Meanwhile,independentconvergenceratesofcurrentobserverandfluxobserveryieldanimprovedperformance.Asuperiorperformanceinthetorqueandfluxresponsesinbothcasesisverifiedbynumeroussimulations.

简介：Theadaptiveoptics(AO)technologywithoutawave-frontsensorissimpleandhasmoreapplicationfieldsthanconventionalAOtechnologies.ThetheorybasisoftheAOsystembasedonstochasticparallelgradientdescent(SPGD)fromtheconvergence,thestability,andtheaveragedconvergencerateisanalyzed,whereSPGDisusedtocontroltheAOsystem.TheresultsshowthattheAOsystembasedonSPGDcanobtaingoodconvergenceandstability,andthefastconvergencerate,whichisininverseproportionton(nisthenumberofcontrolparameters).

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简介：Thispaperpresentsacentralpatterngenerator（CPG）andvestibularreflexcombinedcontrolstrategyforaquadrupedrobot.Anoscillatornetworkandaknee-to-hipmappingfunctionarepresentedtorealizetherhythmicmotionforthequadrupedrobot.Atwo-phaseparametertuningmethodisdesignedtoadjusttheparametersofoscillatornetwork.First,basedonthenumericalsimulation,theinfluencesoftheparametersontheoutputsignalsareanalyzed,thenthegeneticalgorithm（GA）isusedtoevolvethephaserelationshipsoftheoscillatorstorealizethebasicanimal-likewalkingpattern.Moreover,theanimal＇svestibularreflexmechanismismimickedtorealizetheadaptivewalkingofthequadrupedrobotonaslopeterrain.Coupledwiththesensoryfeedbackinformation,therobotcanwalkupanddowntheslopesmoothly.Thepresentedbio-inspiredcontrolmethodisvalidatedthroughsimulationsandexperimentswithAIBO.UnderthecontrolofthepresentedCPGandvestibularreflexcombinedcontrolmethod,AIBOcancopewithslipping,fallingdownandwalkonaslopesuccessfully,whichdemonstratestheeffectivenessoftheproposedwalkingcontrolmethod.

简介：在水下处于复杂海洋条件操作的车辆在决定精确动态模型介绍困难。到对参数无常的保证坚韧性，基于Lyapunov理论和走背的技术，为潜水飞机控制的一个适应控制器被建议。在靠近环的系统，引用深度和沥青角度轨道追踪的asymptotic被完成。模拟结果被介绍尽管有无常，它在系统参数显示出有效潜水飞机控制。

简介：Aself-adaptivelargeneighborhoodsearchmethodforschedulingnjobsonmnon-identicalparallelmachineswithmultipletimewindowsispresented.Theproblems'anotherfeatureliesinoversubscription,namelynotalljobscanbescheduledwithinspecifiedschedulinghorizonsduetothelimitedmachinecapacity.Theobjectiveisthustomaximizetheoverallprofitsofprocessedjobswhilerespectingmachineconstraints.Afirst-infirst-outheuristicisappliedtofindaninitialsolution,andthenalargeneighborhoodsearchprocedureisemployedtorelaxandreoptimizecumbersomesolutions.Amachinelearningmechanismisalsointroducedtoconvergeonthemostefficientneighborhoodsfortheproblem.Extensivecomputationalresultsarepresentedbasedondatafromanapplicationinvolvingthedailyobservationschedulingofafleetofearthobservingsatellites.Themethodrapidlysolvesmostprobleminstancestooptimalornearoptimalandshowsarobustperformanceinsensitiveanalysis.

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简介：Highfrequencysurfacewaveradar(HFSWR)iswellprovedtohaveoverthehorizon(OTH)detectioncapabilitytoweakaerialtargets,suchasconcealedairplanesorcruisemissiles.ThemostimportantproblemofdetectionoffastandsmalltargetsusingHFSWRisearlierwarning,i.e.enlargementofdetectionrangeoftargets.Therefore,thedetectionthresholdshouldbedecreasedaslowaspossible,butnumerousfalsealarmsarebroughtaboutatthesametime.Onthiscondition,conventionaltrackinitiationtechniques,whichnormallyrequiretheprobabilityoffalsealarmtobeatthelevelof10-6,willinitiateenormousfalsetracksandleadtoabnormaloperationoftrackingsystem.Anadaptivemodifiedhoughtransform(AMHT)trackinitiatorisproposedaccordinglyandtherelationofdetectionrangetotheperformanceoftrackinitiatorisanalyzedinthispaper.SimulationsareperformedtoconfirmthecapabilityoftrackinitiationtofastandsmalltargetsindenseclutterbyAMHTtrackinitiator.Thetolerableprobabilityoffalsealarmofdetectorcanreachthelevelof10-3.Anditperformsbetterthantrackinitiatorbasedonmodifiedhoughtransform(MHT).

简介：Theradialplasmapositioncontrolisoneofthebasicplasmacontrolsoftokamak.Inordertomaintainaplasmacolumninthegeometricalcenterofitsvacuumvessel,theexternallyappliedverticalfield(VF)mustbeadjustedtothechangesintheplasmaparameterssuchastheplasmacurrent,poloidalbetaandtheinternalinductance.

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简介：Thedifferentreflectioncharacteristicsofthesurfaceoftinsteelstripsandthedifferentspeedsofthetinninglinedemandanadaptiveilluminationlightsourceforonlinemachinevisioninspection.Thislightsourcecanbeintegratedwithatimedelayintegrationcharge-coupleddevice(TDICCD)tocapturetheimagesofmovingobjectsandfacilitateinspectionofthesurfacequalityoftinsteelstrips.On-siteapplicationshowtheeffectivenessoftheTDIcamerawiththeadaptiveilluminationlightsourceindetectingthesurfacedefectsontinsteelstripsofthreedifferentmaterialsandwithdifferenttincoatingweights.

简介：Theuniaxialperfectlymatchedlayer(PML)methodusesrectangulardomaintodefinethePMLproblemandthusprovidesgreaterflexibilityandefficiencyindeal-ingwithproblemsinvolvinganisotropicscatterers.InthispaperanadaptiveuniaxialPMLtechniqueforsolvingthetimeharmonicHelmholtzscatteringproblemisdevel-oped.ThePMLparameterssuchasthethicknessofthelayerandthefictitiousmediumpropertyaredeterminedthroughsharpaposteriorierrorestimates.TheadaptivefiniteelementmethodbasedonaposteriorierrorestimateisproposedtosolvethePMLequa-tionwhichproducesautomaticallyacoarsemeshsizeawayfromthefixeddomainandthusmakesthetotalcomputationalcostsinsensitivetothethicknessofthePMLabsorb-inglayer.Numericalexperimentsareincludedtoillustratethecompetitivebehavioroftheproposedadaptivemethod.Inparticular,itisdemonstratedthatthePMLlayercanbechosenasclosetoonewave-lengthfromthescattererandstillyieldsgoodaccuracyandefficiencyinapproximatingthefarfields.

简介：我们由把一种适应传播技术与直角的频率部门multiplexing相结合建议并且试验性地示威一个简单可见轻通讯系统。在适应传播计划，力量分配以如此的一个方法被执行至于在电力限制，和适应调整下面最大化隧道能力然后被介绍完成给目标小点错误率的最大的数据率。试验性的结果证明光谱效率能极大地通过这种适应传播技术被改进。

简介：基于不安理论，有混合的域的波浪方程推测操作符有能力处理侧面的速度变化。是图象方法在地震学经历了许多研究。所有推测操作员面对深入地由于继续选择参考速度的问题。有单个引用速度的波浪领域推测操作符对有弱侧面的变化的媒介合适。多参考速度推测操作员能应付严重侧面的速度变化并且改进图象精确性。然而，计算费用大。我们在场自动地根据结构和给定的速度阀值值的复杂性决定选择引用速度的数字的一条自我适应的途径。途径能被用来构造SSF，FFD，WXFD，和GSP多参考速度波浪领域推测图象算法。咸屋顶的模型数据测试的结果证明自我采纳的多参考波浪领域推测算法有能力处理严重侧面的速度变化和罐头也被用于结构边察觉。方法是灵活的并且计算联盟者划算。