简介：Adesignofsemi-submersibleplatformismainlybasedontheextremeresponseanalysisduetotheforcesexperiencedbythecomponentsduringlifetime.Theexternalloadscaninducetheextremeairgapresponseandpotentialdeckimpacttothesemi-submersibleplatform.Itisimportanttopredictairgapresponseofplatformsaccuratelyinordertocheckthestrengthoflocalstructureswhichwithstandthewaveslammingduetonegativeairgap.Thewindloadcannotbesimulatedeasilybymodeltestintowingtankwhereasitcanbesimulatedaccuratelyinwindtunneltest.Furthermore,fullscalesimulationofthemooringsysteminmodeltestisstillatuffworkespeciallythestiffnessofthemooringsystem.Owingtotheabovementionedproblem,themodeltestresultsarenotaccurateenoughforairgapevaluation.Theaimofthispaperistopresentsensitivityanalysisresultsofairgapmotionwithrespecttothemooringsystemandwindloadforthedesignofsemi-submersibleplatform.Thoughthemodeltestresultsarenotsuitableforthedirectevaluationofairgap,theycanbeusedasagoodbasisfortuningtheradiationdampingandviscousdraginnumericalsimulation.Inthepresenteddesignexample,anumericalmodelistunedandvalidatedbyANSYSAQWAbasedonthemodeltestresultswithasimple4linesymmetricalhorizontalsoftmooringsystem.Accordingtothetunednumericalmodel,sensitivityanalysisstudiesofairgapmotionwithrespecttothemooringsystemandwindloadareperformedintimedomain.Threemooringsystemsandfivesimulationcasesaboutthepresentedplatformaresimulatedbasedontheresultsofwindtunneltestsandsea-keepingtests.Thesensitivityanalysisresultsarevaluableforthefloatingplatformdesign.

简介：TosolvetheproblemsoftheAMR-WB+(ExtendedAdaptiveMulti-Rate-WideBand)semi-open-loopcodingmodeselectionalgorithm,featuresforACELP(AlgebraicCodeExcitedLinearPrediction)andTCX(TransformCodedeXcitation)classificationareinvestigated.11classifyingfeaturesintheAMR-WB+codecareselectedand2novelclassifyingfeatures,i.e.,EFM(EnergyFlatnessMeasurement)andstdEFM(standarddeviationofEFM),areproposed.Consequently,anovelsemi-open-loopmodeselectionalgorithmbasedonEFMandselectedAMR-WB+featuresisproposed.TheresultsofclassifyingtestandlisteningtestshowthattheperformanceofthenovelalgorithmismuchbetterthanthatoftheAMR-WB+semi-open-loopcodingmodeselectionalgorithm.

简介：在这篇论文，为与多重播放器一起的微分比赛的纳什equilibria被学习。为在与多重播放器一起的线性二次的游戏的开环的纳什策略的微分方程被介绍的为解决Riccati类型矩阵的一个方法；分析答案为系统矩阵能是diagonalizable的微分在游戏的一种类型被给。作为特殊情况，为有特别结构的微分比赛的某类型的纳什equilibria也被学习，；在以前的文学的一些结果被扩大。最后，一个数字例子被给说明答案过程的有效性。

简介：AparallelhybridlinearsolverbasedontheSchurcomplementmethodhasthepotentialtobalancetherobustnessofdirectsolverswiththeefficiencyofpreconditionediterativesolvers.However,whensolvinglarge-scalehighly-indefinitelinearsystems,thishybridsolveroftensuffersfromeitherslowconvergenceorlargememoryrequirementstosolvetheSchurcomplementsystems.Toovercomethischallenge,weinthispaperdiscusstechniquestopreprocesstheSchurcomplementsystemsinparallel.Numericalresultsofsolvinglarge-scalehighly-indefinitelinearsystemsfromvariousapplicationsdemonstratethatthesetechniquesimprovethereliabilityandperformanceofthehybridsolverandenableefficientsolutionsoftheselinearsystemsonhundredsofprocessors,whichwaspreviouslyinfeasibleusingexistingstate-of-the-artsolvers.

简介：Thispaperisconcernedwiththedesignofamemorystatefeedbackcontrollerforlinearsystemswithintervaltime-varyingdelays.Thetimedelayisassumedtobeatime-varyingcontinuousfunctionbelongingtoagiveninterval,whichmeansthatthelowerandupperboundsoftime-varyingdelayareavailable.First,alessconservativedelay-range-dependentstabilitycriteriaisproposedbyusinganewintervalfractionmethod.Intheprocessofcontrollersynthesis,thehistoryinformationofsystemisconsideredinthecontrollerdesignbyintroducingthelowerdelaystate.Moreover,theusualmemorylessstatefeedbackcontrollerfortheunderlyingsystemscouldbeconsideredasaspecialcaseofthememorycase.Finally,twonumericalexamplesaregiventoshowtheeffectivenessoftheproposedmethod.

简介：ThemixedH2/H∞guaranteedcostcontrolproblemviastatefeedbackcontrollawsisconsideredinthispaperforlinearsystemswithnorm-boundedparameteruncertainty.Basedonthelinearmatrixinequality(LMI)approach,sufficientconditionsarederivedfortheexistenceofguaranteedcostcontrollerswhihcguaranteenotonlyaprespecifiedH∞disturbanceattenuationlevelononecontrolledoutputforalladmissibleparameteruncertainties,butalsotheworst-caseH2performanceindexontheothercontrolledoutputtobenomorethanaspecifiedbound.Furthermore,aconvexoptimizationproblemisformulatedtodesignanoptimalH2/H∞guaranteedcostcontroller.

简介：MODIS(中等决定成像分光辐射函数)是在地(曙光女神AM)和水(曙光女神下午)上的一台关键仪器卫星。线性光谱混合模型为陆地封面的亚象素分类被用于MOIDS数据。在中国的浙江省的Shaoxing县被选择是学习地点，早米饭作为学习庄稼被选择。从MODIS象素使用的陆地封面的导出的比例线性光谱混合模型与从在一样的天获得的TM数据导出的无指导的分类相比，它暗示MODIS数据能为米饭耕作被用作卫星数据来源区域评价，可能米饭生长在地区性的规模上监视并且产量预报。

简介：Onthebasisoftheformulationsofthelogarithmicbarrierfunctionandtheideaoffollowingthepathofminimizersforthelogarithmicbarrierfamilyofproblemsthesocalled"centralpath"forlinearprogramming,weproposeanewframeworkofprimal-dualinfeasibleinteriorpointmethodforlinearprogrammingproblems.Withoutthestrictconvexityofthelogarithmicbarrierfunction,wegetthefollowingresults:(a)ifthehomotopyparameterμcannotreachtozero,thenthefeasiblesetoftheseprogrammingproblemsisempty;(b)ifthestrictlyfeasiblesetisnonemptyandthesolutionsetisbounded,thenforanyinitialpointx,wecanobtainasolutionoftheproblemsbythismethod;(c)ifthestrictlyfeasiblesetisnonemptyandthesolutionsetisunbounded,thenforanyinitialpointx,wecanobtaina(?)-solution;and(d)ifthestrictlyfeasiblesetisnonemptyandthesolutionsetisempty,thenwecangetthecurvex(μ),whichtowardstothegeneralizedsolutions.

简介：Thispaperpresentsaninvestigationontheself-focusing/defocusingofchirpedGaussianlaserbeamincollisionalplasmawithlinearabsorption.WehavederivedthedifferentialequationforthebeamwidthparameterbyusingWKBandparaxialapproximationsandsolveditnumerically.Theeffectofchirpandotherlaserplasmaparametersisseenonthebehaviorofbeamwidthparameterwithdimensionlessdistanceofpropagation.Theresultsarediscussedandpresentedgraphically.Oursimulationresultsshowthattheamplitudeofoscillationsdecreaseswiththedistanceofpropagation.Duetocollisionalfrequency,thelaserbeamshowsfastdivergencewhichcanbeminimizedbytheintroductionofchirpparameter.Thechirpdecreasestheeffectofdefocusingandincreasestheabilityofself-focusingoflaserbeamincollisionalplasma.

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简介：为一个真实珍视的函数，f在有限间隔上定义我我们从形式行(y)=的微分操作符的空空格考虑接近的f的问题?k=0naky(k)L_n(\psi)=\sum\limits_{k=0}^n{a_k\psi^{(k)}}，在此经常的系数kR可以被使适应f。

简介：Thispaperaddressesthedesignproblemofrobustiterativelearningcontrollersforaclassoflineardiscrete-timesystemswithnorm-boundedparameteruncertainties.Aniterativelearningalgorithmwithcurrentcyclefeedbackisproposedtoachievebothrobustconvergenceandrobuststability.Thesynthesisproblemoftheproposediterativelearningcontrol(ILC)systemisreformulatedasaγ-suboptimalH-infinitycontrolproblemviathelinearfractionaltransformation(LFT).AsufficientconditionfortheconvergenceoftheILCalgorithmispresentedintermsoflinearmatrixinequalities(LMIs).Furthermore,thelineartransferoperatorsoftheILCalgorithmwithhighconvergencespeedareobtainedbyusingexistingconvexoptimizationtechniques.Thesimulationresultsdemonstratetheeffectivenessoftheproposedmethod.

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简介：在到化学动力学的从血浆的科学应用程序，大量时间的规模能在微分方程的一个系统介绍。一个主要困难由于系统的僵硬被遇到，开发能存取以前达不到的参数政体的快数字计划被要求。在这个工作，我们与不连续的系数为线性平常的微分方程的一个多尺度的不可思议地使不安的系统考虑一个起始期末考试的价值问题。我们构造一个定制的有限的点方法，它产出在最大的标准收敛的近似解决方案，一致地关于单个不安参数，到准确解决方案。在最大的标准的参数制服错误估计也被证明。数字实验的结果，支持理论结果，被报导。[从作者抽象]

简介：Thispaperdealswiththecapabilitiesoflinearandnonlinearbeamtheoriesinpredictingthedynamicresponseofanelasticallysupportedthinbeamtraversedbyamovingmass.Tothisend,thediscreteequationsofmotionaredevelopedbasedonLagrange’sequationsviareproducingkernelparticlemethod(RKPM).Foraparticularcaseofasimplysupportedbeam,GalerkinmethodisalsoemployedtoverifytheresultsobtainedbyRKPM,andareasonablygoodagreementisachieved.Variationsofthemaximumdynamicdeflectionandbendingmomentassociatedwiththelinearandnonlinearbeamtheoriesareinvestigatedintermsofmovingmassweightandvelocityforvariousbeamboundaryconditions.Itisdemonstratedthatformajorityofthemovingmassvelocities,thedifferencesbetweentheresultsoflinearandnonlinearanalysesbecomeremarkableasthemovingmassweightincreases,particularlyforhighlevelsofmovingmassvelocity.Exceptforthecantileverbeam,thenonlinearbeamtheorypredictshigherpossibilityofmovingmassseparationfromthebasebeamcomparedtothelinearone.Furthermore,theaccuracylevelsofthelinearbeamtheoryaredeterminedforthinbeamsunderlargedeflectionsandsmallrotationsasafunctionofmovingmassweightandvelocityinvariousboundaryconditions.

简介：Thisarticleconcernsthedelay-independentguaranteed-costcontrolproblemviamemorylessstatefeedbackforaclassofneutral-typesystemswithstructuraluncertaintyandagivenquadraticcostfunction.Newdelay-independentconditionsfortheexistenceoftheguaranteed-costcontrollerarepresentedinthetermofLMIs.Analgorithminvolvingoptimizationisproposedtodesignacontrollerachievinganoptimalguaranteed-cost,suchthat,thesystemcanbestabilizedforalladmissibleuncertainties.Anumericalexampleisprovidedtoillustratethefeasibilityoftheproposedmethod.

简介：In[7],CrossshowedthatthespectrumofalinearrelationTonanormedspacesatisfiesthespectralmappingtheorem.Inthispaper,weextendthenotionofessentialascentanddescentforanoperatoractingonavectorspacetolinearrelationsactingonBanachspaces.Wefocustodefineandstudythedescent,essentialdescent,ascentandessentialascentspectrumofalinearrelationeverywheredefinedonaBanachspaceX.Inparticular,weshowthatthecorrespondingspectrumsatisfythepolynomialversionofthespectralmappingtheorem.

简介：ExistingmanifoldlearningalgorithmsuseEuclideandistancetomeasuretheproximityofdatapoints.However,inhigh-dimensionalspace,Minkowskimetricsarenolongerstablebecausetheratioofdistanceofnearestandfarthestneighborstoagivenqueryisalmostunit.Itwilldegradetheperformanceofmanifoldlearningalgorithmswhenappliedtodimensionalityreductionofhigh-dimensionaldata.Weintroduceanewdistancefunctionnamedshrinkage-divergence-proximity(SDP)tomanifoldlearning,whichismeaningfulinanyhigh-dimensionalspace.Animprovedlocallylinearembedding(LLE)algorithmnamedSDP-LLEisproposedinlightofthetheoreticalresult.Experimentsareconductedonahyperspectraldatasetandanimagesegmentationdataset.Experimentalresultsshowthattheproposedmethodcanefficientlyreducethedimensionalitywhilegettinghigherclassificationaccuracy.

简介：Thisstudyaimstoexploregenerationmechanismsoftheoceaninternalwaveusingthedynamicalanalysismethodsbasedonlineartheories.Historicalcruisemeasurementsandrecentsyntheticapertureradar(SAR)observationsofmesoscaleeddieswithdiameterofseveraltensofkilometerstohundredsofkilometersshowthattheinternalwavepacketswithwavelengthofhundredsofmeterstokilometerexistinsidethemesoscaleeddies.Thiscoexistencephenomenonandinherentlinksbetweenthetwodifferentscaleprocessesarerevealedinthesolutionsofgoverningequationsandboundaryconditionsfortheinternalwavedisturbancewithahorizontallyslowlyvariableamplitudeinacylindricalcoordinatesystem.Thetheoreticalsolutionsindicatethattheinstabilityofeddycurrentfieldprovidesthedynamicalmechanismtointernalwavegeneration.Thederiveddispersionrelationindicatesthattheinternalwavepropagationismodifiedbytheeddycurrentfieldstructure.Theenergyequationoftheinternalwavesclearlyshowstheinternalwaveenergyincrementcomesfromtheeddy.Thetheoreticalmodelsareusedtoexplaintheobservationofthemesoscaleeddy-inducedinternalwavesofftheNorwegiancoast.Thetwo-dimensionalwaveformsolutionoftheanticycloniceddy-inducedinternalwavepacketappearsasring-shapedcurves,whichcontainsthetypicalfeaturesofeddystreamlines.ThecomparisonoftheoreticalsolutionstothestructureoftheinternalwavepacketsonSARimageshowsagoodagreementonthemajorfeatures.

简介：Considerarepeatedmeasurementpartiallylinearregressionmodelwithanunknownvectorparameterβ,anunknownfunctiong(.),andunknownheteroscedasticerrorvariances.Inordertoimprovethesemiparametricgeneralizedleastsquaresestimator(SGLSE)ofβ,weproposeaniterativeweightedsemiparametricleastsquaresestimator(IWSLSE)andshowthatitimprovesupontheSGLSEintermsofasymptoticcovariancematrix.Anadaptiveprocedureisgiventodeterminethenumberofiterations.Wealsoshowthatwhenthenumberofreplicatesislessthanorequaltotwo,theIWSLSEcannotimproveupontheSGLSE.Theseresultsaregeneralizationsofthosein[2]tothecaseofsemiparametricregressions.