学科分类
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44 个结果
  • 简介:Equivalentsourcelayer(ESL)imagingisanimportantkindofhigh-resolutionelectroencephalogram(EEG)imaging.Itconsistsoftwocategories:equivalentdipolelayer(EDL)andequivalentchargelayer(ECL).Bothofthemareassumedtobelocatedonornearthecorticalsurfaceandhavebeenproposedashigh-resolutionimagingmodalitiesorasintermediatestepstoestimatetheepicorticalpotential.Here,EDLandECLbasedonarealisticheadmodelarepresented,bothsimulationsandrealdataexperimentaredonetocomparethesetwomodels.TheresultsshowthatECLcanprovidehigherspatialresolutionaboutsourcelocationthanEDLdoes.

  • 标签: 等效源 头模型 偶极子模型 电荷模型 成像方式 空间分辨率
  • 简介:Thecooperativeprincipleisanimportanttheoryofpragmatics,concerninghowtomaximallyachievecommunicativegoal.Whiletranslationservesasacommunicativemedium,itshouldalsoobservetheconversationalrules—cooperativeprincipletoachievetheequivalenteffect.Thispapertriestoexploretheissuefromtheperspectiveofcooperativeprinciple.

  • 标签: TRANSLATION COOPERATIVE PRINCIPLE EQUIVALENT effec
  • 简介:ItisanewresearchtopictocreatearationaljudgmentmatrixusingthecognitiontheorybecauseoftheconstructionofjudgmentmatrixinAHPinvolvingthedecision-maker'scognitiveactivities.Owingtothepresenceofuncertaininformationinthedecisionprocedure,theimproperuseoftheuncertaininformationwilldoubtlesscauseweightchanges.Inthispaper,weaddafeedforwardprocesspriortoconstructingthejudgmentmatrixsothatthedecisionmakercanuseboththecertainanduncertaininformationtogettheinitialuncertainroughjudgmentmatrix,andthenconvertitintoafuzzymatrix.Consequently,itwillbebetterfordecisionmakertoobtaintheroughsetoforderequivalentclassesthroughthedecisiongraph.Accordingtothequalitativeanalysis,thedecisionmakercaneasilyconstructthefinaljudgmentmatrixinstructedbytheroughsetcreatedearlier.

  • 标签: AHP 模糊理论 顺序等价性 期望理论
  • 简介:没有衍生物的使用,在这份报纸,我们在联合起来的球建立-Bloch功能的相等的描述,它概括并且改善Nowak,赵,Wulan和李的结果。

  • 标签: 等价刻画 单位球 函数
  • 简介:在这篇论文,我们由光滑ω_的r-thDitzian-Totik模量为伯恩斯坦操作员的联合在同时的近似上给相等的定理(φ~λ)~r(f,t)(0≤λ≤1)。我们也调查在联合ofBernstein操作符的衍生物和函数的衍生物的光滑之间的关系。

  • 标签: BERNSTEIN算子 组合 同时逼近 平滑性
  • 简介:Therelationsofallgeneralizedvariationalprinciplesinelasticityarestudiedbyemployingtheinvariancetheoremoffieldtheory.Theinfinitesimalscaletransformationinfieldtheorywasemployedtoinvestigatetheequivalenttheorem.Amongtheresultsfoundparticularlyinterestingarethoserelatedtothatallgeneralizedvariationalprinciplesinelasticityareequaltoeachother.Alsostudiedresultisthatonlytwovariablesareindependentinthefunctionalandthestress-strainrelationisthevariationalconstraintconditionforallgeneralizedvariationalprinciplesinelasticity.ThisworkhasprovenagaintheconclusionofProf.ChienWei-zang.

  • 标签: 弹性力学 变分法 刻度转换 不变性 普通变分原则
  • 简介:在硫酸盐离子的攻击下面的水泥臼的扩大性质被试验性、理论的方法学习。首先,水泥臼与水的比率被制作到0.4,0.6,和0.8的水泥。第二,标本的扩大在硫酸盐答案埋头了在不同时间被测量。第三,在硫酸盐侵蚀下面的水泥臼的扩大的一个理论模型被优点建议代表体积元素方法。在这个模型,损坏进化由于在推迟的ettringite和水泥臼之间的相互作用被考虑。最后,数字计算被执行。数字、试验性的结果显示模型完美地描述水泥臼的扩大。

  • 标签: 尺度效应 微空洞 硫酸钠 膨胀理论
  • 简介:在一篇最近的文章[物理信A372(2008)417],王等。建议了一个方法,它被叫(G'/G)扩大方法,寻找非线性的进化方程的旅行波浪答案。包含KdV方程,mKdV方程,变体Boussinesq方程,和Hirota一种奶油色的陶器方程的参数的旅行波浪解决方案被使用这个方法获得。他们想(G'/G)扩大方法是一个新方法和许多非线性的进化方程的更多的旅行波浪答案能被获得。在这篇论文,我们将证明(G'/G)扩大方法等价于扩大tanh功能方法。

  • 标签: BOUSSINESQ方程 非线性演化方程 函数法 展开法 tanh函数方法 MKDV方程
  • 简介:Usingequivalentblackbodytemperature(TBB)dataretrievedfrommeteorologicalsatelliteGMS-5during1996-2002,thecorrelationbetweenthecircularsymmetric/asymmetriccomponentofTBBandtheintensityoftropicalcyclone(TC)atvarioustimelagsfrom0to48hisanalyzedfortheNorthwestPacific(0°-50°N,120°-155°E),excludinglandedandnear-coastsamples.ItisfoundthatthetotalTBBnearsoutheastoftheeyewall,thecircularsymmetriccomponent,andthesumoftheamplitudesoftangentialwavenumbers1-10(SA10)oftheTBBbetweentheradiiof0.8°and1.7°aresignificantlyandnegativelycorrelatedwiththeTCintensityatvarioustimelagsfrom0to48h.Especially,themaximum24-hlagcorrelationcoefficientsreach-0.52,-0.58,and-0.625,respectively.AstatisticalpredictionschemeforTCintensityisdevelopedbasedonclimaticpersistent,synoptic,andTBBfactorsbystepwiseregressiontechnique.ItisfoundthatthevariancecontributionoftheaveragedTBBovertheringbetween1.0°and1.5°fromtheTCcenterranksthefourthintheequationfor12-hTCintensityprediction,andthoseofthetotalTBBnearsoutheastoftheeyewallandthedifferencebetweenmaximumandminimumTBBbetween1.1°and1.5°rankthethirdandfifthrespectivelyinthe24-hforecastequation.Itisalsoshownthat,withTBBfactors,thefollowingpredictionsareimprovedcomparedtotheschemewithoutTBBfactors:48-hpredictionforseveretropicalstorm(STS),12-hpredictionforTCwithaweakeningrategreaterthan15ms~(-1)/12h,24-hintensitypredictionforTCwithalmostnointensitychange,and48-hpredictionforTCintensifyingfasterthan10ms~(-1)/48h.

  • 标签: 热带气旋 强度预报 黑体温度 天气预报
  • 简介:ThispapershowsthatXisuniformlynon-squareiffP(η_o)>0forsomeη_o∈(0,2).ThusXissuper-reflexiveifandonlyifforXthereexistsanequivalentnormwhichmeetstheabovecondition.Byvirtueofthebeforementionedresult,theauthorderivesthenecessary,andsuffi-cientconditionsforXandl~p(X_j)beinguniformlynon-square,respectively,andgivesacharacterizationoffinite-dimensionalspaceswhichareuniformlynon-square.

  • 标签: MODULUS convexity/uniformly non-square SPACE super-reflexive SPACE
  • 简介:Theexactformoftheexteriorproblemforplaneelasticityproblemswasproducedandfullyprovedbythevariationalprinciple.Basedonthis,theequivalentboundaryintegralequations(EBIE)withdirectvariables,whichareequivalenttotheoriginalboundaryvalueproblem,werededucedrigorously.TheconventionallyprevailingboundaryintegralequationwithdirectvariableswasdiscussedthoroughlybysomeexamplesanditisshownthatthepreviousresultsarenotEBIE.

  • 标签: 等价边界方程 间接变量 EBIE 平面弹性问题 初始边界值 结构力学
  • 简介:Animprovedrandomizedalgorithmoftheequivalent2-catalogsegmentationproblemispresented.Theresultobtainedinthispapermakessomeprogresstoanswertheopenproblembyanalyzethisalgorithmwithperformanceguarantee.A0.6378-approximationfortheequivalent2-catalogsegmentationproblemisobtained.

  • 标签: 组合最优化 采矿数据 逼近法则 半定程序
  • 简介:TheEquivalentParametersofanInclinedSlotinTwoCrossedWaveguideswithRadiatingSlots¥LueShanwei&TangHongzhen(BeijingUniversityofAe...

  • 标签: Radiating SLOT Feeding SLOT CROSSED waveguide