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  • 简介:1.IntroductionOnthemorningofApril1st,2001,aU.S.EP-3surveillanceaircraftwasconductinganintelligenceflightalongtheChineseterritorialborderintheairspacesouth-eastofChina'sHainanIsland.TwoChinesefighter

  • 标签: 中-美关系 外交政策 高压政治 国际关系
  • 简介:Thechangesintheiridocornealanglestructureduringaccommodationareassessedbymeansofanteriorsegmentopticalcoherencetomography.Thirteenrighteyeswereincludedinthestudy.ThedeviceusedforthemeasurementwastheVisante?omnisystem.Thestimuliweresetupatdifferentvergences(0.0D,-1.5D,and-3.0D).Theangleopeningdistance500and750,thetrabecularirisspacearea500and750,andthescleralspurangleparameterswereassessedatthenasalandtemporalregions.Theresultsintheiridotrabecularanglecomparingthethreeaccommodativestatesoftheeyedidnotyieldanystatisticallysignificantdifferenceatnasalortemporalanglesections.Inlightofourresultsandintheconditionsofourstudy,thestructuresoftheiridocornealanglearenotsignificantlychangedwithaccommodation.

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  • 简介:Consideringtheadditionalelectricenergygeneratedafterthefulloperationoftheundergroundhydropowerstation,theelectricenergyaccommodationoftheThreeGorgesProject(TGP)isreviewed.Itisfocusedontheadditionalelectricityaccommodation,basedontheresearchattheearlystage.Theelectricenergyaccommodationsolutionsarerecommendedasthat,basedonthecost-benefitanalysisofthepowerdistributionarea,theadditionalelectricenergyoftheThreeGorgesshouldbegivenprioritytomeettheneedsatthesupplyendofHubeiandChongqing.TheresultsofthisresearchhasareferencevalueontheimplementationoftheThreeGorgeselectricpoweraccommodation,afterthefurtheroptimizationofthetransmissioncurvesinbothwetanddryseasons.

  • 标签: 三峡水电站 住宿 电能 成本效益分析 三峡工程 地下水电站
  • 简介:Thispaperproposesanovelideathatclassifiesfaultsintotwodifferentkinds:seriousfaultsandsmallfaults,andtreatsthemwithdifferentstrategiesrespectively.Akindofartificialneuralnetwork(ANN)isproposedfordetectingseriousfaults,andvariablestructure(VS)model-followingcontrolisconstructedforaccommodatingsmallfaults.Theproposedframeworktakesbothadvantagesofqualitativewayandquantitativewayoffaultdetectionandaccommodation.Moreover,theuncertaintycaseisinvestigatedandtheVScontrollerismodified.Simulationresultsofaremotelypilotedaircraftwithcontrolactuatorfailuresillustratetheperformanceofthedevelopedalgorithm.

  • 标签: 神经网络 变结构控制 故障诊断 故障调节
  • 简介:Thispaperpresentsareal-timemechanismtotoleratefaultsoccurringinawindturbine(WT)system.ThissystemiscomposedofaFASTcodedsimulatordesignedbytheU.S.NationalRenewableEnergyLaboratory.Thedemonstratedmechanismliesunderthetaxonomyofactivefault-tolerantcontrol(FTC)systems,namelyonlineredesignbasedapproach.Intheproposedapproach,wedonotuseanyaprioriinformationaboutthemodeloftheturbineinreal-time.Infact,weuseonlinemeasurementsgeneratedbytheWT.Basedonthegivencontrolspecifications,andtheobservedmeasurementanoccurredfaultisaccommodatedbyreconfiguringtheonlinecontrollersuchthattheWTgeneratesratedpowerevenunderfaultyconditions.Second,noexplicitfaultdiagnosis(FD)moduleisusedinthisapproach.Asaresult,issuesofmodeluncertainty,falsealarms,etc.associatedwithanintegratedFDandcontrollerreconfigurationapproachtoFTCsystemsarenotexperiencedhere.

  • 标签: 在线控制器 故障诊断 可再生能源 机组系统 设计方法 实验室