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简介：ThisworkisaimedtorigorouslymanagevoltagesaturationandmaximumcurrentconstraintsinShuntActiveFilters.Inthisrespect,assuming'unconstrained'controlalgorithmshavealreadybeendefinedtoachievestandardobjectivesforsuchdevices(i.e.currenttrackingforharmoniccompensationandDC-busvoltageboundness),aplug-inunit,orientedtoextendthesystemoperatingregionandatthesametimepreservinggoodperformanceunderlargetransientsandoverloadconditions,ispresented.Thissolutionallowstoimproveavailability,robustnessandcomposabilityofShuntActiveFilters,whichareexpectedtobekeyfeaturesinpresentandnextgenerationcomplexandpossibly'smart'powergrids.Theproposedunitiscomposedbytwoparts.First,asuitableanti-windupstrategyisdefinedinordertodealwithcontrolinputsaturation.Itsmainpurposeistopreservetheoriginal'unconstrainederrordynamics',infaceofinputsaturation,whileguaranteeinglowcomputationalburdenandreducedperformanceimpairment(thelattergoal,inharmoniccompensationcontext,leadstorathernon-standardproblemformulation).Tothisaim,theanti-windupactsonthecurrentreferencesthroughasuitably-designedadditionaldynamics.Then,inordertocopewithcurrentlimitations,anadditionalstrategyhasbeendesigned;againthecurrentreferencesissuitablyshapedtocomplywiththefeaturesandboundsofthesystem,augmentedwiththeabove-mentionedanti-windupsolution.TheproposedschemecanbesimplyjoinedtoanykindofunconstrainedcontrolleradoptedtosteerShuntActiveFilters.Inthiswork,anInternal-Model-basedcurrentcontrollerisadoptedasabenchmarkcase.Theproposedapproachisvalidatethroughextensivesimulationtests.

简介：Thispaperproposesadecentralizedoutputfeedbackcontrolschemeappliedtotwo-areainterconnectedpowersystem.ThecontrollersynthesisproblemisformulatedasthescaledH∞controlproblemandanewLMI-basedalgorithmisproposedtocomputethedecentralizedcontroller.TheproposedcontrollerprovidesrobustnesswithregardtoparametricuncertaintiesandalsoattenuatesboundedexogenousdisturbancesinthesenseofL2-gain.Simulationresultsclearlyshowtheeffectivenessofdevelopeddecentralizedoutputfeedbackcontrolscheme.

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简介：Wecomputedsourceparametersfor143earthquakeswithM_L≥1.0occurringfromJanuary,2011toMarch,2014usingwaveformdatarecordedbytheNuozhaduandJinghongReservoirSeismicNetworks.Then,thevariationofseismicactivityandthecharacteristicsofsourceparametersbeforeandaftertheimpoundmentofthereservoirwereinvestigated.Theresultsshowthat:(1)theseismicactivityincreasedobviouslyaftertheimpoundment,especiallyduringthe3-4monthsafterimpoundment;(2)thefocaldepthsoftheearthquakesoccurringinthereservoirareaareshallowerthantheearthquakesoccurringoutsidethereservoirareaintheinitialstageofimpoundment,butafteratime,thedifferencewasgraduallyreduced;(3)cornerfrequencyvarieswiththeseismicmomentandthelog-linearrelationshipismoreobviousafterimpounding;(4)stressdropandapparentstressincreasewithincreasingseismicmoment,moreovertheyarelowerfortheearthquakesoccurringinthereservoirareaafterimpoundingthanthoseoccurringoutsidethereservoirareaorbeforeimpoundingwiththesameseismicmoment;(5)theeffectofreservoirimpoundmentonanearthquakecanreachadepthof10km,andthemaximumeffectisseenatadepthof3km-6km,andthedifferencesofseismicactivityandaverageapparentstressbetweentheinsideandoutsideofthereservoiraresignificant.

简介：自然生态系统的损失和破碎广泛地作为对生物多样性保存的最重要的威胁被认出，与在大多数危及的生态系统之中的新热带区的干燥森林。区域和边效果是在碎裂的风景的主要因素。这里，我们检验区域和边效果和他们的相互作用，在联系到一个碎裂的ChacoSerrano森林里的本国的植被的节肢动物的整体上。我们在改变尺寸并且在边/内部位置的12碎片在三本国的植物种上分析了家庭丰富和草食动物，食肉动物，和parasitoids的社区作文。我们也由使用指示物种类分析寻找了指示物家庭。有森林碎片区域的减小的家庭丰富的损失为三个功能的组被观察，与类似的大小。而食肉动物没被边/内部位置影响，parasitoid丰富显示出在区域和位置之间的一个相互作用，没有在边和区域效果之间的相互作用，草食动物在边是更富有的，与在边的一个更陡峭的区域斜坡。草食动物，食肉动物，和parasitoid集合的家庭作文也受森林区域或边/内部状况影响。我们为大残余发现三指示物家庭并且五为边。我们的结果在一个高度威胁的区域为分类的节肢动物和功能的差异的保存支持森林区域的关键角色，并且强调需要在如此的差异上理解在区域和边效果之间的相互作用。

简介：Withtheincreasingnumberoflaserbeams,themaindifficultyinarrangingbeamguidingsystems(BGSs)involvesdeterminingthecorrespondingrelationshipsbetweentheoutputandinputportstorealizetheidentifiedlightpathlengthofallbeams.Giventhebasicconstraintsofgeometricarrangement,aBGSmodelisestablished,andabase-linealgorithmisproposedtoaddressthedifficultymentionedabove.Boundaryconditionsoftargetareaandtargetchamberarediscussedtoincreasethenumberoflaserbeams,andamaximumvalueexistsforaspecifictargetarea.Finally,thecompatibilityofacylindricalhohlraumtargetchamberwithasphericalhohlraumisanalyzed,andamoveablefinalopticsassemblyisproposedtoexecutetheswitchbetweenthetwodifferenttargets.

简介：TheChina-ASEANFreeTradeAreahascontributedtothedeepeningofeconomictiesandcooperationacrossallfields,butithasalsogeneratedcertainproblems.Inordertoachieveasustainabledevelopmentinthefuture,deepenedeconomictiesfeaturingmutualbenefitsarerequired.Thebasicapproachistoformasystemofverticaldivisionthroughanindustrialvaluechaindominatedbythefreetradearea.ThiswillhelpbuildChinaintoamorepowerfulfinalproductmarketandboostregionaleconomicintegration.更多还原

简介：Thefarmlandtoforestprojecthasasignificantpromotingroleonecologicalcivilization;thefollow-upindustrydevelopmentisthekeytoconsolidatingachievementsofthefarmlandtoforestproject.Usingthesurveydataoffarmlandfarmers,thisarticleanalyzesthestatusanddevelopmentofthefollowupindustryinGuizhouprovince.Theresultsshowthatthefollow-upindustrydevelopmentqualityislow,thefollow-upindustrydevelopmentwillingnessisweak,thefollow-upindustrydevelopmentabilityispoor,andthefollow-upindustrysustaineddevelopmentisinsufficient.Furtheranalysisindicatesthatthefollow-upindustrydevelopmentlackoffunds,technicalandsystemofpolicysupport.Policyimplicationsarediscussedfocusingonimprovingpolicysystem,thefollow-upindustrydevelopmentstrategy,thefollow-upindustrydevelopmentplanning,anddevelopmentwiththecombinationofdevelopmentstrategyofGuizhouprovince.

简介：UsingtheThreeRiversHeadwatersAreainChinaasapilotproject,thisstudyhasinvestigatedtheeffectivenessoftheecologicalcompensationpoliciesandpracticeshaveimplementedinthisareaoverthepastdecade.Majorissueshaveencounteredduringtheimplementationprocess,includingtheformidableextentofgrasslanddegradation,thecomprehensivenatureofmeasuresneededtorestoretheecosystem,andthetimeneededtoachievethesegoals.Theseissuesarediscussed,andremedialmeasuresproposed.Theyinclude:draftingregulationsgivingtheThreeRiversHeadwatersAreaecologicalprotection,settingasidefundsforecologicalcompensationandestablishinganationalpark,usinganecologicalassetsaccountingmethodologyforfinancialreportingpurposes,designingascience-basedapproachforconductingthelivestockhusbandrypopulationmigration,enhancingtheoversightcapacityforallaspectsoftheecologicalcompensationprocess,andmakinganoverallplantopromotetheharmoniousdevelopmentofthisareatogetherwithotherregionsinQinghaiProvince.

简介：作文，来源和在中央黄海泥区域和他们的可能的影响因素的沉积的TOC(全部的器官的碳)的埋葬流动的长期的变化在这份报纸被讨论。第一，类似分析被采用证实碳埋葬特征源于二收集了核心在YSWC(黄海温暖的水流)是流行的中央黄海泥区域是典型的。在这个基础上，这里的TOC的埋葬流动被认为是235.5488.4mol/(厘米2一)自从第一条工业革命，为大约在在沉积的TC(全部的碳)的埋葬流动之中的70%90%的财务。在二个核心与的比较TOC/TC比率在世界范围的另外的海洋的沉积，我们建议calcareous/non-calcareous有机体和IC(无机的碳)的溶解的生长是在沉积控制TOC/TC比率的重要因素。基于13C数据显示那导出水兵的器官的碳(OCa)是在全部的埋葬之中的主要部分超过85%说明比率的器官的碳。由于在二个核心的高TOC/TC比率，在沉积的TC主要也作为OCa存在，并且OCa的比例关于60%80%。是OCa在在中央黄海泥区域的沉积的所有埋葬OC之中是占优势的主要原因离开上面的水里的岸和相对高的主要生产。在这个泥区域的OC的埋葬被人的活动主要可能影响。尽管经济发展在期间晚，第一条工业革命在中国引起的第19世纪显然没在沉积增加TOC埋葬流动，自从1950年代，在成立新中国以后的工业和农业的上升清楚地增加了TOC埋葬流动。否则，我们也在TC埋葬流动之中认识到那，为大约在中央黄海泥区域的沉积的10%30%的TIC报道，它的埋葬不能简单地因此这里被忽略。从TOC埋葬不同，长期的TIC埋葬流动变化更仔细与气候联系变化：东方亚洲夏天季风可以影响Huanghe河(黄河)洪水的力量，它能进一步在沉积从土地影响陆上的IC的运输到中央黄海以及这些IC的埋葬。

简介：Inthiswork,themorphologiesandporestructuresofaseriesofcorncob-derivedactivatedcarbonsandzeolitetemplatedcarbonwithultrahighsurfaceareawerecarefullyinvestigatedbySEM,HRTEMandN2-sorptioncharacterizationtechnologies.Thehigh-pressurehydrogenuptakeperformancewasanalyzedusingstandardPressure-Composition-Temperatureapparatusinordertostudytheporesizeeffectsonhydrogenuptake.Theseas-obtainedporouscarbonsshoweddifferentcharacteristicsofporesizedistributionaswellasspecificsurfacearea.Theresultsindicatethatthemosteffectiveporesforadsorbinghydrogendependedonthestoragepressure.Theseultramicropores(0.65-0.85nm)couldbethemosteffectiveporesonexcessH2uptakeat1bar,however,micropores(0.85-2nm)wouldplayamoreimportantroleinexcessH2uptakeathigherpressureat77K.Atroomtemperature,poresizeeffectsonH2uptakecapacitywereveryweak.BothspecificsurfaceareaandtotalporevolumeplaymoreimportantrolesthanporesizeforH2uptakeatroomtemperature,whichwasclearlydifferentfromthatat77K.Forapplicationsinfuture,thecorncob-derivedactivatedcarbonscanbemoreavailablethanzeolitetemplatedcarbonsat77K.ElementdopingenhancedhydrogenuptakecouldbemainresearchdirectionforimprovingH2uptakecapacityatroomtemperature.更多还原

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简介：AtomicallythinMoS2filmshaveattractedsignificantattentionduetoexcellentelectricalandopticalproperties.Thedevelopmentofdeviceapplicationsdemandstheproductionoflarge-areathinfilmwhichisstillanobstacle.Inthisworkwedevelopedafacilemethodtodirectlygrowlarge-areaMoS2thinfilmonSiO2substrateviaambientpressurechemicalvapordepositionmethod.Thecharacterizationsbyspectroscopyandelectronmicroscopyrevealthattheas-grownMoS2filmismainlybilayerandtrilayerwithhighquality.Back-gatefield-effecttransistorbasedonsuchMoS2thinfilmshowscarriermobilityupto3.4cm2V-1s-1andon/offratioof105.Thelarge-areaatomicallythinMoS2preparedinthisworkhasthepotentialforwideoptoelectronicandphotonicdeviceapplications.

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