简介：Adual-ratepreviewcontrolstrategyforatypeofdiscrete-timesystemisproposedbasedonthetheoryofmultiratecontrol.First,byusingthediscreteliftingtechnique,thegeneraldual-ratediscrete-timesystemisconvertedintoasingle-rateaugmentedsystem.Onthisbasis,theaugmentederrorsystemisconstructedbyintroducingafirst-orderdifferenceoperatorandthepreviewablereferencesignal.Thenthetrackingproblemistransformedintoaregulatorproblemoftheaugmentederrorsystem.Theoptimalpreviewcontrollawoftheaugmentederrorsystemisobtainedbyusingstandardlinearquadraticoptimalpreviewcontroltheory,andthentheoptimalpreviewcontrolleroftheoriginalsystemisderived.Inaddition,thenecessaryandsufficientconditionsforthecontrolleraregiven.Finally,simulationresultsshowtheeffectivenessoftheproposedmethod.

简介：Theeffectsofmeasurementnoiseareinvestigatedinthecontextofbipartiteconsensusofmulti-agentsystems.Inthesystemsetting,discrete-timedouble-integratordynamicsareassumedfortheagent,andmeasurementnoiseispresentfortheagentreceivingthestateinformationfromitsneighbors.Time-varyingstochasticbipartiteconsensusprotocolsaredesignedinordertolessentheharmfuleffectsofthenoise.Consequently,thestatetransitionmatrixoftheclosed-loopsystemisanalyzed,andsufficientandnecessaryconditionsfortheproposedprotocoltobeameansquarebipartiteconsensusprotocolaregivenwiththehelpoflineartransformationandalgebraicgraphtheory.Itisproventhatthesigneddigraphtobestructurallybalancedandhavingaspanningtreearetheweakestcommunicationassumptionsforensuringbipartiteconsensus.Inparticular,theproposedprotocolisameansquarebipartiteaverageconsensusoneifthesigneddigraphisalsoweightbalanced.

简介：Thispaperconsidersadiscrete-timeGeo/G/1queueinamulti-phaseserviceenvironment,wherethesystemissubjecttodisastrousbreakdowns,causingallpresentcustomerstoleavethesystemsimultaneously.Atafailureepoch,theserverabandonstheserviceandthesystemundergoesarepairperiod.Afterthesystemisrepaired,itjumpstooperativephaseiwithprobabilityqi,i=1,2···,n.Usingthesupplementaryvariabletechnique,weobtainthedistributionforthestationaryqueuelengthatthearbitraryepoch,whicharethenusedforthecomputationofotherperformancemeasures.Inaddition,wederivetheexpectedlengthofacycletime,thegeneratingfunctionofthesojourntimeofanarbitrarycustomer,andthegeneratingfunctionoftheserver’sworkingtimeinacycle.Wealsogivetherelationshipbetweenthediscrete-timequeueingsystemtoitscontinuous-timecounterpart.Finally,someexamplesandnumericalresultsarepresented.

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简介：最近，QQ姐姐收到了很多小朋友的优秀作文。但是，仍有一些不足之处。一起去看看怎么修改吧!

简介：Inthispaper,weestablishsomenewdiscreteinequalitiesofOpial-typewithtwosequencesbymakinguseofsomeclassicalinequalities.Theseresultscontainasspecialcasesimprovementsofresultsgivenintheliterature,andtheseimprovementsarenewevenintheimportantdiscretecase.

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简介：在这份报纸，完整的分离本地设计稳定了(LPS)方法被建议与相等的顺序元素解决不稳定的海军司烧方程的最佳的控制问题。对流效果和压力被使用LPS方法两个都稳定。一个priori错误关于雷纳兹一致地估计数字被获得，提供真答案是足够的光滑。数字实验被实现说明并且证实我们的理论分析。

简介：StoryTime板块为每个单元的核心板块，也是单元语言项目的重要载体。该板块相应的教学策略有：适当呈现语言知识，规划词句新授；合理使用文本图片，优化文本信息；多向训练语言技能，整合表达内容；分部引导表演，推进深度参与；准确定位文本拓展，促发多元思维。

简介：Inordertoachievetheinformationfusioninthetimedomainbasedontheevidencetheory,anevidencecombinationmethodinthetimedomainbasedonreliabilityandimportanceisproposedaccordingtotheideaofevidencediscount.Firstly,thedistortionofthetime-domainevidenceisjudgedbasedonsingleexponentialsmoothing.Thereal-timereliabilityoftheevidenceattheadjacenttimeisobtainedbythereal-timereliabilityassessmentmethodoftheevidencebasedonthecredibilitydecaymodel.Then,therelativeimportanceoftheevidenceattheadjacenttimeisobtainedbycomprehensivelyconsideringimprovedconflictdegreeanduncertainty.Finally,basedonthecriterionofevidencediscountandtheDempster’sruleofcombination,theevidencecombinationiscarriedouttoachievethesequentialcombinationoftime-domainevidence.Thenumericalsimulationandanalysisshowthatthismethodhasfullyembodiedthedynamiccharacteristicsoftime-domainevidencecombination,andithasstrongprocessingabilityforconflictinformationandanti-disturbingability.Theproposedmethodhasgoodapplicabilitytoinformationfusioninthetimedomain.

简介：本单元知识网络同步讲解SectionA1.Whattimedoyougotoschool?你什么时候去上学?(1)whattime意为'什么时候,几点',常用来对具体的时间提问,可以用when替换。如:—WhattimedoesJimgotobed?吉姆什么时候睡觉?—Hegoestobedatteno’clock.他十点钟睡觉。

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简介：译林版小学英语4AUnit8Dolls,Funtime＆Cartoontime.

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简介：OnJuly23,adam-breakoccurredtotheAuxiliaryDamofXePian-XeNamnoyHydropowerStationlocatedinSouthernLaos,and5billioncubicmetersofwaterflowedoutinafewhours,whichhascausedthemostseriousfloodofthepasttenyearsinLaosandincurredthelossofmanylives.

简介：这份报纸由在矩阵的半张肌产品的框架下面使用图论的方法在一个温和假设下面处于状态与时间变体延期为布尔控制网络(BCN)的observability给一个相等的条件。首先，在考虑下面的BCN被分成没有时间延期的分系统的一个有限数字。第二，BCN的observability被测试所谓的observability的observability验证构造路径(没有时间延期的一个特殊分系统)基于图理论。这些结果在BCN的observability上扩大最近的相关结果。例子被显示说明结果的有效性。