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95 个结果
  • 简介:在由Brackx的最近的报纸,Delanghe;Sommen,一些基本更高维的分布在克利福德分析的框架被重新考虑,最后在欧几里德几何学的空格导致新分布的四个宽广的类的介绍。在当前的纸,我们继续这些分布的深入的学习,更明确地他们在频率空间的行为的学习,泛音分析的因此延长的古典结果。

  • 标签: 傅立叶光谱 分布 CLIFFORD分析 基础高阶分布 框架
  • 简介:Autofluorescencespectrafromtheserumofhealthmanandcancerpatientshavebeenmeasuredandanalyzed.Twoobviouslyspectracharacteristicsoftheserumhavebeendiscussedindetail.Anovellasercancerdiagnosissystem(LCD-1)hasbeenestablishedandthediagnosisresultsarecomparedwithclinicalmethods.

  • 标签: 癌症诊断 荧光谱 血浆
  • 简介:Thispapercontributestoextractinginformationfromsignalsofbroadbandultrasonicattenuationspectrumforeffectiveutilizationinparticlesizecharacterization.Thesingleparticlescatteringmodelandthecoupled-phasemodelareformulatedsimultaneously,therelationshipbetweenparticlesizedistributionandultrasonicspectrumisestablished,andaconvergencecriterionforcalculationisquantified.Demonstrationinversionbytheoptimumregularizationfactormethodiscarriedouttoyieldtypicalnumericalresultsfordiscussion.Withtheexperimentalset-updevelopedbytheInstituteofParticleandTwo-PhaseFlowMeasurement(IPTFM)attheUniversityofShanghaiforScienceandTechnology,sandsedimentparticlesizeismeasuredbyattenuationspectrumandanalyzedusingtheaboveinversionalgorithmandtheoreticalmodels.Tovalidatetheproposedultrasonicspectrumparticlesizingmethod,resultsarecomparedwiththoseobtainedbymicroscopy.

  • 标签: ULTRASONIC SPECTRUM PARTICLE SIZE INVERSION
  • 简介:Wefindanasymptoticexpressionforthecharacteristictimescalesofdecorrelationprocessesinweaklycompressibleandisothermalturbulence.ThisresultisusedintheEddy-DampedQuasi-NormalMarkovianequationtoderivethescalingsofcompressibleenergyspectra:(1)iftheacousticwavesaredominant,thecompressibleenergyspectraexhibit?7/3scaling;(2)iflocaleddystrainingisdominant,thecompressibleenergyspectraarescaledas?3.Meanwhile,theenergyspectraofincompressiblecomponentsdisplaythesamescalingof?5/3asthoseinincompressibleturbulence.Thedirectnumericalsimulationsofweaklycompressibleturbulenceareusedtoexaminethescaling.

  • 标签: COMPRESSIBLE TURBULENCE Energy spectra TWO-POINT CLOSURE
  • 简介:Inthispaper,westudytheperturbationofspectrafor2×2operatormatricessuchasMX=(AX0B)andMZ=(ACZB)ontheHilbertspaceH⊕Kandthesets∩X∈B(K,H)Pσ(MX),∩X∈B(K,H)Rσ(MX)and∩Z∈B(H,K)σ(MZ),∩Z∈B(H,K)Pσ(MZ),∩Z∈B(H,K)Rσ(MZ),∩Z∈B(H,K)Cσ(MZ),whereR(C)isaclosedsubspace,arecharacterized

  • 标签: 算子矩阵 扰动 希尔伯特空间
  • 简介:Anewpolarizationgatingisdemonstratedbyourprinciple-of-proofexperiment,whichistheoreticallyproposedtogeneratetheisolatedordoubleattosecondpulseswiththemulti-cycledrivinglaserpulseinthepreviouswork[OpticsExpress.20,5196(2012)].Intheexperiment,thepolarizationgatingisformedbytwoorthogonally-polarizedlinearlychirpedmulti-cyclelaserpulses,andthespectralbandwidthsoftheharmonicsarebroadenedbymorethantwotimes,whichagreewiththeprevioustheoreticalwork.

  • 标签: 光谱带宽 偏振态 谐波 激光脉冲 周期驱动 阿秒脉冲
  • 简介:有四值的沃尔什系列的布尔功能的三个班被介绍,他们的沃尔什光谱分布是坚定的。他们从Maiorana-McFarland和DillonPS的弄弯的函数被导出<潜水艇class=“a-plus-plus”>ap类型并且单项的形式\Tr_1^{2m}\lambdax^{r2^m-1}由在二点补充弄弯的函数的值的\指。

  • 标签: 沃尔什谱 布尔函数 BENT函数 频谱分布 单项式 AP
  • 简介:Theobjectiveofthestudywastoelucidateopticalcharacteristicsofthechromophorestructuresoffluorescentproteins.RamanspectraofcommonlyusedGFP-likefluorescentproteins(FPs)withdiverseemissionwavelengths(green,yellow,cyanandred),includingtheenhancedhomogenousFPsEGFP,EYFP,andECFP(fromjellyfish)aswellasmNeptune(fromseaanemone)weremeasured.High-qualityRamanspectrawereobtainedandmanymarkerbandsforthechromophoreoftheFPswereidentifiedviaassignmentofRamanspectrabands.WereportthepresenceofapositivelinearcorrelationbetweentheRamanbandshiftofCs=C6andtheexcitationenergyofFPs,demonstratedbyplottingabsorptionmaxima(cm-1)againstthepositionoftheRamanbandCs=C6inEGFP,ECFP,EYFP,theanionicchromophoreandtheneutralchromophore.ThisstudyrevealednewRamanfeaturesinthechromophoresoftheobservedFPs,andmaycontributetoadeeperunderstandingoftheopticalpropertiesofFPs.

  • 标签: RAMAN SPECTRA FLUORESCENT protein CHROMOPHORE
  • 简介:Basedonthe4×4matrixmethod,wepresenttheoreticalcalculationsofthemagneto-opticpolarKerreffectwiththeincidentenergyingranularfilms.Itisfoundthatthesimulatedresultsareingoodagreementwithexperimentalones.Inaddition,Kerrrotationandellipticityasfunctionsofincidentangleandmagneticfilmthicknesshavebeencomputed.ThecalculatedresultsindicatethattheKerrspectraasafunctionoftheincidentanglerevealamaximumatcertainincidentanglesandtheKerrspectraappeartobeperiodicalandhavedampedoscillationasafunctionofthemagneticfilmthickness,whichisimportantforthedesignofthematerialsinthefuture.

  • 标签: 克尔光谱 数值计算 磁性薄膜 矩阵理论 磁光极化 克尔旋转
  • 简介:NormalHamanSpectra(NRS)ofsolidPMT(1-phenyl-5-mercaptotetrazole)andMBT(2-mercaptobenzothiazole)andtheirsurfaceenhancedRamanspectra(SERS)adsorbedonthesurfaceofthesilversubcolloidalparticlesarereportedandcompared.ItissupposedthatPMTadsorbedonsilverwithbothNandSatomswhereasMBTmaybeadsorbedonsilverthroughSatom.

  • 标签: SILVER adsorbed SERS SURFACE supposed SALTS
  • 简介:[1]S.Jin,T.H.Tiefel,M.McCormack,etal.:Sci-ence,264(1994),p.413.[2]R.vonHelmolt,J.Wecker,B.Holzapfel,etal.:Phys.Rev.Lett.,71(1993),p.2331.[3]Y.Shimakawa,Y.Kubo,T.Manako:Nature,379(1996),p.53.[4]C.Zener:Phys.Rev.,82(1951),p.403.[5]A.J.Millis,P.B.Littlewood,B.I.Shraiman:Phys.Rev.Lett.,74(1995),p.5144.[6]A.J.Millis,B.I.Shraiman,R.Mueller:Phys.Rev.Lett.,77(1996),p.175.[7]D.Louca,T.Egami,E.L.Brosha,:Phys.Rev.B,56(1997),p.8475.[8]G.Zhao,K.Conder,H.Keller,etal.:Nuture,381(1996),p.676.[9]C.H.Booth,F.Bridges,G.J.Snyder,etal:Phys.Rev.B,54(1996),p.15606.[10]K.H.Kim,J.Y.Gu,H.S.Choi,etal.:Phys.Rev.Lett.,77(1996),p.1877.[11]S.Zhou,G.Zhou,Y.Zhang:Jpn.J.Appl.Phys.,38(1999),p.5075.[12]S.Tajima,A.Masaki,S.Uchida,etal.:J.Phy.C:SolidStatePhys.,20(1987),p.3469.[13]L.M.Rodriguez-Martinez,J.P.Attfield:Phys.Rev.B,58(1998),p.2426.

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  • 简介:Poroussiliconpreparedbypulseelectro-etchingisheat-treatedinO2atmospherewithanenhancementofitsPLpeakandanimprovementofitsPLstability.ThePLpeakofasampleporoussilicontreatedinO2atmosphereat1000℃presentsitselfathree-peakstructureand,comparedwithanun-heat-treatedsample,thereexistsblueshiftof~40nm.

  • 标签: Heat treatment BLUE SHIFT STABILITY PHOTOLUMINESCENCE
  • 简介:Newmarkdesignspectrahavebeenimplementedinmanybuildingcodes,especiallyinbuildingcodesforcriticalstructures.PreviousstudiesshowthatNewmarkdesignspectraexhibitloweramplitudesathighfrequenciesandlargeramplitudesatlowfrequenciesincomparisonwithspectradevelopedbystatisticalmethods.Toresolvethisproblem,thisstudyconsidersthreesuitesofgroundmotionsrecordedatthreetypesofsites.Usingthesegroundmotions,influencesoftheshear-wavevelocity,earthquakemagnitudes,source-to-sitedistancesontheratiosofgroundmotionparametersarestudied,andspectrumamplificationfactorsarestatisticallycalculated.Spectralboundsforcombinationsofthreesitecategoriesandtwocasesofearthquakemagnitudesareestimated.Sitedesignspectrumcoefficientsforthethreesitecategoriesconsideringearthquakemagnitudesareestablished.TheproblemsofNewmarkdesignspectracouldberesolvedbyusingthesitedesignspectrumcoefficientstomodifythespectralvaluesofNewmarkdesignspectraintheaccelerationsensitive,velocitysensitive,anddisplacementsensitiveregions.

  • 标签: 地震震级 设计谱 场地类别 剪切波速度 地面运动 网站设计
  • 简介:象严肃那样的垂直负担可以在大楼的地震反应上有重要影响。在这份报纸,连续砍横梁模型被扩大学习地震需求砍有严肃的考虑的大楼在近地的地面运动下面装载效果。免费运动方程的一个分析答案作为严肃砍横梁模型以一个Bessel系列被提供。为计算interstory飘移系列的一个方法被建议。为有不同脉搏的二个近地的记录的interstory飘移系列被介绍说明严肃和抑制比率的效果。interstory飘移系列也习惯于分析光谱近的差错的特征在2008Wenchuan地震期间扎根了运动。严肃负担比率,抑制比率和更高的模式的效果被调查并且讨论。

  • 标签: 移谱法 重力 间位 计算 地震反应 地面运动
  • 简介:Featurereductionisakeyprocessinpatternrecognition.Thispaperdealswiththefeaturereductionmethodsforatime-shiftinvariantfeature,powerspectrum,inRadarAutomaticTargetRecognition(RATR)usingHigh-ResolutionRangeProfiles(HRRPs).Severalexistingfeaturereductionmethodsinpatternrecognitionareanalyzed,andaweightedfeaturereductionmethodbasedonFisher'sDiscriminantRatio(FDR)isproposedinthispaper.AccordingtothecharacteristicsofradarHRRPtargetrecognition,thisproposedmethodsearchestheoptimalweightvectorforpowerspectraofHRRPsbymeansofaniterativealgorithm,andthusreducesfeaturedimensionality.Comparedwiththemethodofusingrawpowerspectraandsomeexistingfeaturereductionmethods,theweightedfeaturereductionmethodcannotonlyreducefeaturedimensionality,butalsoimproverecognitionperformancewithlowcomputationcomplexity.Intherecognitionexperimentsbasedonmeasureddata,theproposedmethodisrobusttodifferenttestdataandachievesgoodrecognitionresults.

  • 标签: 雷达 目标自动识别 RATR 分辨率 能量光谱