简介:在核范数鲁棒主成分分析的基础上,利用加权Schatten-p范数和l2,1范数重新构造鲁棒的主成分分析问题,使得原始稀疏正则化、秩最小化问题得到了较好的非凸逼近.建立一个新的基于加权Schatten-p范数和l2,1范数的鲁棒主成分分析(WLSRPCA)模型,并使用增广拉格朗日乘子法进行求解.在图像去噪的实验中,WLSRPCA模型去噪效果比鲁棒主成分分析模型更好.
简介:ConsiderL2-projectionuhofuton-degreefiniteelementspaceonone-dimensionaluniformgrids.TwodifferentclassesoftheorthogonalexpansioninanelementforconstructingasuperclosetofunctionuhareproposedandthensuperconvergenceforbothuhandDuhareproved.Whennisoddandnoboundaryconditionsareprescribed,thenuhisofsuperconvergenceatn+1orderGausspointsGn+1ineachelement.Whennisevenandfunctionvaluesontheboundaryareprescribed,thenuhisofsuperconvergenceatn+1orderpointsZn+1ineachelement.Iftheotherboundaryconditionsaregiven,thentheconclusionsarevalidinallelementsthatitsdistancefromtheboundary≥ch|lnh|.Theaboveconclusionsarealsovalid.forn-dergreerectangularelementQ1(n).
简介:Nervelesionsurfaceiscommonlytreatedbylocalacupointsortheacupointsalongtheaffectedmeridians,referringtosymptomatictreatment,andthetreatmentofBiao.SelectionofacupointsbasedonthedifferentiationofsyndromesisinthecategoryofholistictreatmentandthetreatmentofBen.Thelocalselectedacupointsonnervelesionsurfacemayworkontheaffectedareadirectlyandplaytheimportantsignificanceintherecoveryofnervefunction.But,facialparalysisischieflymanifestedastheholisticdisorderofthebodyanditspathologicalmechanismisquitecomplicated,withmuchmoresyndromes.Hence,inordertoachievesatisfactorytherapeuticeffects,itisnecessarytodistinguishtheetiology,classifythesyndromes,makethedifferentiationofsyndromesandapplysystematictreatment.Itisthemainapproachtoselecttheacupointsbasedonthedifferentiationanditisviewedthattheorganiccombinationisthekeybetweentheselectionofacupointsbasedonnervelesionsurfaceandthatbasedondifferentiationofsyndromessothatthetherapeuticeffectmaybeenhanced.
简介: Enantioimericallypure1,l'-bi-2-naphthol(BINOL)1anditsderivativesareimportantchiralligandsandauxiliariesforanumberofasymmetrictransformations1suchasaldolcondensations,alkylations,Diels-Alderreactions,Michaeladditions,epoxidations,etc.Opticallypure1andtheirderivativeshavealsobeenusedextensivelyinchiralrecognition,chiralseparationandintheconstructionoffunctionalisedmaterials2.Furthermore,(R)-and(S)-BINOLarealsofundamentalstartingmaterialsforthesynthesisofalargevarietyofotherchiralbinaphthylssuchasMOP(2c),NOBIN(2d)andBINAP(2e).Asaresultthedevelopmentofefficientandeconomicmethodsforthepreparationofopticallypure1hasattractedmuchattentioninrecentyears3andnovelmethodsfortheresolutionof(±)-1continuetobedeveloped.……
简介:We’llstudytheFEMforamodelforcompressiblemiscibledisplacementinporousmediawhichincludesmoleculardiffusionandmechanicaldispersioninone-dimensionalspace.Aclassofvertices-edges-elementsinterpolationoperatorinkisintroduced.Withthehelpofink(notellipticprojection),theoptimalerrorestimateinL∞(J;L2(Ω))normofFEMisproved.
简介:讨论了一类不确定随机时滞系统的鲁棒L2-L∞滤波器设计问题。目的是对于所容许的不确定性和时滞,设计一个稳定线性滤波器,使得滤波误差动态系统是随机渐近稳定的且满足给定的L2-L∞性能要求γ。给出了解决这个问题的充分条件,并且当这些条件满足时,以参数显式化的形式给出了所求的鲁棒L2-L∞滤波器。最后用数值算例验证了结论的可行性和有效性。
简介:摘要:按照连杆机构的各结构的相对运动是平面运动还是空间运动,可以将连杆机构分为平面连杆机构和空间连杆机构两大类,而在平面连杆机构中,按照组成运动链的各机构是否构成首尾封闭的系统,可以分为开式运动链和闭式运动链,简称其为开链和闭链。本文主要介绍平面开式运动链中的三杆机构、“ L” 型空间连杆机构、以及有关平面连杆机构、空间连杆机构的一些相关知识。
简介:SomecharacterizationsoftheconditionalexpectationoperatorsonLebesgue-BochnerspacesL_p(μ,X)aregiven,where1≤p<∞,p≠2.AlsoanexampleisgiventoshowthatthecharacterizationsoftheconditionalexpectationoperatorsonL_p(μ,X)aredifferentfromthatonL_p(μ)_zFinally,arepresentationoftheconstant-preservingcontractiveprojectiononspacesL_p(μ,X)isgotwhen0