简介：Recently,someresearchesindicatethatpositivefeedbackcanbenefitthecontrolifappropriatetimedelayisintentionallyintroducedintocontrolsystem.However,mostworkistheoreticalonebutfewareexperimental.Thispaperpresentstheoreticalandexperimentalstudiesofdelayedpositivefeedbackcontroltechniqueusingaflexiblebeamasresearchobject.Thepositivefeedbackweightingcoefficientisdesignedbyusingtheoptimalcontrolmethod.Theavailabletimedelayisdeterminedbyanalyzing...

简介："RenaissanceHumanism"isaveryimportantphilosophicalandculturalmovementinthehistoryoftheMiddleAgesinEurope.ThisthesistriestodiscussthepositiveinfluencesofRenaissancehuman-ismonEuropeanpolitics.

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简介：Leaderpropagationisafundamentalissueinlightningphysics.Thepropagationcharacteristicsofpositiveleadersandnegativeleadersaresummarizedandcomparedbasedondatafromhigh-speedcameraandelectromagneticfieldinrocket-triggeredlightningandtower-initiatedlightningdischarges;availablechannelbasecurrentdatarecordedinrocket-triggeredlightningarealsoused.Thenegativeleaderspropagateinasteppedfashionaccompaniedbymanybranches.Thestemsaheadofthenegativeleadertipdeterminethemanneranddirectionoftheleaderpropagation,andeventhebranchingandwindingofthelightningchannel.Theimpulsivecurrent,electromagneticfield,andrelatedopticalimagessuggestthatthepositiveleadermaydevelopinastep-likefashionatitsinitialstageoftriggeredlightning.However,thesteppingprocessesofthepositiveleaderareobviouslydifferentfromthoseofthenegativeleader.Tower-initiatedlightningrevealedthatthemostconspicuouscharacteristicsofthestepwisepositiveleaderinvolvetheintermittentbrush-likecoronazoneinfrontoftheleadertipandtheluminosityenhancementofthechannelbehindthetip.Inrockettriggeredlightningflashes,thechargetransferredduringanindividualstepforthenegativeleaderwasnearlyanordergreaterthanforthepositivecounterpart.Thesuccessivestreamersaheadoftheleadertipareessentialforbothnegativeandpositiveleaderpropagation,andthestemscouldbeformedfromoneormorestreamersinthepreviousnegativestreamerzonewiththemainleaderchanneldim.High-resolutionobservationoftowerlightningalsorevealedanewtypeofbidirectionalrecoilleader,withpolaritycontrarytothetraditionalone,traversinginnegativechannelsassociatedwithtower-initiatedandrocket-triggeredlightning.

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简介：Inthispaper,westudythehybridSchr¨odingerequationinvolvingnormalandfractionalLaplaceoperator,andobtaintheexistenceofthesolutionstothisclassofthehybridpartialdifferentialequation.Ourmainargumentisvariationalmethods.

简介：ＯＮＴＨＥＥＸＩＳＴＥＮＣＥＡＮＤＵＮＩＱＵＥＮＥＳＳＯＦＰＯＳＩＴＩＶＥＳＯＬＵＴＩＯＮＳＦＯＲＡＣＬＡＳＳＯＦＤＥＧＥＮＥＲＡＴＥＥＬＬＩＰＴＩＣＳＹＳＴＥＭＳ￥ＣＨＥＮＺＨＥＮＴＡＯ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，Ｘｉａｎｇｔ...

简介：Theproblemofimprovingtheperformanceofmin-sumdecodingoflow-densityparity-check(LDPC)codesisconsideredinthispaper.Basedonmin-sumalgorithm,anovelmodifiedmin-sumdecodingalgorithmforLDPCcodesisproposed.Theproposedalgorithmmodifiesthevariablenodemessageintheiterationprocessbyaveragingthenewmessageandpreviousmessageiftheirsignsaredifferent.Comparedwiththestandardmin-sumalgorithm,themodificationisachievedwithonlyasmallincreaseincomplexity,butsignificantlyimprovesdecodingperformanceforbothregularandirregularLDPCcodes.Simulationresultsshowthattheperformanceofourmodifieddecodingalgorithmisveryclosetothatofthestandardsum-productalgorithmformoderatelengthLDPCcodes.

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简介：在LHT模型的过程tch，e+eb，e+ebh和ppb上的风味变化效果在这份报纸被调查。我们从T同等值奇怪的镜子费米子和计量器波色子计算一个环水平贡献。结果证明最高的夸克在LHT模型的稀罕腐烂tch能显著地在SM相对那被提高。在在LHT模型的线性colliders的b生产能非常提高SM生气的节并且在在实验允许的一些参数空格到达0.1fb。但是重计量器波色子和镜子费米子环有小贡献到过程ppb和e+ebh。e+eb上的LHT效果可能因此在未来被检测线性colliders，当为e+e被看太小时，bh和ppb在未来处理线性colliders和LHC。

简介：LetAandCdenoterealn×nmatrices.Givenrealn-vectorsx1,………,xm,m≤n,andasetofnumbers(L)={λ1,λ2…λm}，Wedescrbe(Ⅰ)theset()ofallrealn×nbisymmetricpositiveseidefinitematricesAsuchthatAxiisthe"best"approximatetoλixi,i=1,2,...,minFrobeniusnormand(Ⅱ)theYinset()whichminimizeFrobeniusnormof||C-Y||.AnexistencetheoremofthesolutionsforProblemⅠandProblemⅡisgivenandthegeneralexpressionofsolutionsforProblemⅠisderived.SomesufficientconditionsunderwhichProblemⅠandProblemⅡhaveanexplicitsolutionisprovided.Anumer-icalalgorithmofthesolutionforProblemⅡhasbeenpresented.

简介：BytheSchauder-Tychonofffixed-pointtheorem,weinvestigatetheexistenceandasymptoticbehaviorofpositiveradialsolutionsoffullynonlinearellipticequationsinR^n.WegivesomesufficientconditionstoguaranteetheexistenceofboundedandunboundedradialsolutionsandconsiderthenonexistenceofpositivesolutioninR^n.

简介：在这篇论文，单调的存在下列秒顺序的积极答案三点的边界价值问题被学习：在哪儿η∈(0，1)，δ∈[0，∞)，f∈C([0，1]×[0，∞)，[0，∞))。在某些生长下面调节非线性的条款f并且由由于Avery，安德森和Krueger使用锥扩大的一条固定的点定理和功能的类型的压缩，为单调的存在的足够的条件积极答案被获得，答案的界限被给。最后，一个例子被给说明纸的结果。

简介：这篇论文在一根一半线上调查singularsub线性的边界价值问题的积极答案的存在。为积极连续答案或光滑的答案在上的存在的必要、足够的条件[0，∞)被构造新更低、上面的答案给。

简介：在米饭的Phytochromes被由三个成员，PHYA，PHYB，和PHYC组成的一个基因家庭编码。通过以photomorphogenesis描绘phytochrome异种和野类型(WT)，单个phytochromes的角色preliminarily在调整米饭de青白化，flowering时间和富饶被探索了。然而，很少信息都没关于是否或怎么被报导phytochromes在米饭影响叶绿素生合成和叶绿体开发。在这研究，我们比较了野类型和phyA的叶绿素内容，在任何一个白人光(WL)下面成年或红的phyB和phyAphyB异种点亮(R)。结果建议phyB察觉R断然调整叶绿素生合成，当phyA的角色能仅仅在phyB缺乏的异种被检测时。涉及叶绿素生合成的基因的表示层次的分析表明phytochromes由调整protochlorophylloxidoreductaseA(PORA)影响了叶绿素生合成表示。在叶绿体开发的phyB的角色也被分析，并且结果建议phyB察觉R由影响叶绿体和grana的数字调整叶绿体开发，以及叶绿体膜系统。

简介：LetA∈Cm×n,seteigenvaluesofmatrixAwith|λ1（A）|≥|λ2（A）|≥…≥|λn（A）|,writeA≥0ifAisapositivesemidefiniteHermitianmatrix,anddenote∧k（A）=diag（λ1（A）,…,λk（A））,∧(（n-k）.（A）=diag(λk+1（A）,…,λn（A）)foranyk=1,2,...,nifA≥0.DenoteallnorderunitarymatricesbyUn×n.Problemofequalitiestoholdineigenvalueinequalitiesforproductsofmatriceswas

简介：AnexampleofcompletsRiemannianmetricofpositive(ornonnagative)curvatureonR^nsuchasds^2=a(x)dx^2isobtainedbydirectcaculations.Furthermore,byusingageodesicconvexconditionandatheoremforcompletenoncompactRiemannianmanifold,anexistenceresultofperiodicsulutionofprescribedenergyforasingularHamiltoniansystemisalsoobtained.

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