学科分类
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302 个结果
  • 简介:在线上的顺序三的方程被显示出全球性好的为概括Korteweg-deVries的起始的价值问题为不平的数据摆姿势。我们的证明基于Colliander,龙骨,Staffilani,Takaoka,和道介绍的多线性的估计和我方法。

  • 标签: KDV方程 多线性估计 SOBOLEV空间 负指数
  • 简介:Thefar-fieldimagingpropertiesofahighindexmicrospherelensspatiallyseparatedfromtheobjectareexperimentallystudied.Ourexperimentalresultsshowthat,foraBlu-raydiskwhosespacingis300nm,thehighindexmicrospherelensalsocandiscernthepatternsoftheobjectsamplewhenthedistancebetweenthelensandtheobjectisupto5.4μm.Whenthedistanceisincreasedfrom0to5.4μm,forthemicrospherelenswithadiameterof24μm,thelateralmagnificationincreasesfrom3.5×to5.5×,whilethefieldofviewdecreasesfrom5.1to3.0μm.Byvaryingthedistancebetweenthelensandtheobject,theopticalimagecanbeoptimized.Wealsoindicatethatthefar-fieldimagingcapabilityofahighindexmicrospherelensisdependentontheelectromagneticfieldintensityprofileofthephotonicnanojetunderdifferentpositionsofthemicrospherelens.

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  • 简介:最近的年里的华南海夏季风发作日期和东方亚洲夏季风索引的定义的结果在这篇论文被总结。并且要决定的更多的问题以后被介绍。

  • 标签: 中国 南海 夏季 季风 东亚地区
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  • 简介:Inthispaper,aplasmonicsrefractiveindexsensorwiththesemiring-stubsystemcoupledtoabuswaveguideispro-posed.Thestructurecanachievewavelengthbandtunableandultra-sharpFanoresonance.Thecouplingmechanismbetweenthebrightmodeanddarkmodeisinvestigatedindetail,andapparentplasmoninducedtransparency(PIT)isrealizedontheresonancewavelength.Thefullwidthathalfmaximum(FWHM)oftheresonantwavelengthismodulatedbyadjustingthecoupleddistance.Thesensitivityandfigureofmerit(FOM)oftheproposedsensor'canreachupto600nm/RIUand120onthevisibleregion,respectively,andthisperformancecanbehelpfulfordesigningthephotonicintegratedcircuitandopticalcommunication,inaddition,itcanbeappliedforbio-sensing.

  • 标签: PLASMONICS Fano RESONANCE SENSOR
  • 简介:Objective:ToevaluatetherelationshipbetweentheefficienciesofsubsegmentalTAEandtheexpressionofPCNAwithABCimmunohistochemicalstaininginHCCs.Methods:Ultrasound-guidedneedlebiopsieswereperformedin43patients(41men,2women;agerange:32~75years,mean,55.6years).PCNAwereexaminedusingABCimmunohistochemicalstaining.TumorscoresofPCNAwereassessedbycountingthepositivenucleiper1,000cells.AllthecasesreceivedsubsegmentalTAEwithiodizedoilandgelatinsponge.AcorrelationbetweentheexpressionofPCNAandtheefficienciesofsubsegmentalTAEwassought.Normalitytest,ranksumtestandChi-squaretestwereusedinstatisticalanalyseswithSASpackage.Results:ThemeanPCNAlabelingindexwas58±29(range,27-100%)in43patients.Whencomparedwiththemacroscopicandpathologicparameters,PCNAlabelingindexwasfoundtobesignificantlyrelatedtothepresenceandactivityofcirrhosis.PCNAlabelingindexdidnotrelatedtopatients'age,sex,HbsAgstatusorserumα-fetoproteinlevel.ThePCNAlabelingindexcorrespondedtothedegreeofhistologicaldifferentiation(Edmenderson-Steinergrading).ThesurvivalratesaftersubsegmentalTAEwererespectively86.05%,65.12%and51.16%inone-,two-andthree-years,andweresignificantlyhigherinthelowlabelingindexgroupthanthatinthehighlabelingindexgroup.Conclusion:ThePCNAlabelingindexwasshowntobecloselyrelatedtohistologicalcharacteristicsandsurvivalofthepatients.

  • 标签: 化学免疫疗法 肝动脉 HCC PCNA 基因表达 肝肿瘤
  • 简介:Objective:Thepredictiveandprognosticroleofprognosticnutritionalindex(PNI)ingastriccancerpatientswithperitonealdisseminationremainsunclear.ThisstudyaimstoexploretheroleofthePNIinpredictingoutcomesofgastriccancerpatientswithperitonealdissemination.Methods:Atotalof660patientsdiagnosedwithgastricadenocarcinomawithperitonealmetastasisbetweenJanuary2000andApril2014atSunYat-senUniversityCancerCenterandtheSixthAffiliatedHospitalofSunYatsenUniversitywereretrospectivelyanalyzed.Theclinicopathologiccharacteristicsandclinicaloutcomesofpatientswithperitonealdisseminationwereanalyzed.Results:ComparedwithPNI-highgroup,PNI-lowgroupwascorrelatedwithadvancedage(P=0.036),worseperformancestatus(P<0.001),higherfrequencyofascites(P<0.001)andhigherfrequencyofmultisitedistantmetastasis(P<0.001).Kaplan-MeiersurvivalcurvesshowedthatPNI-highgrouphadasignificantlylongermedianoverallsurvivalthanPNI-lowgroup(13.13vs.9.03months,P<0.001).MultivariatesurvivalanalysisrevealedthatBorrmanntypeIV(P=0.014),presenceofascites(P=0.017)andlowerPNI(P=0.041)wereindependentpoorprognosticfactors,andpalliativesurgery(P<0.001)andfirst-linechemotherapy(P<0.001)weregoodprognosticfactors.Forpatientsreceivingpalliativesurgery,thepostoperativemorbidityratesinthePNI-lowgroupandPNIhighgroupwere9.1%and9.9%,respectively(P=0.797).ThepostoperativemortalityratewasnotsignificantlydifferentbetweenPNI-lowandPNI-highgroups(2.3%vs.0.9%,P=0.362).Conclusions:PNIisausefulandpracticaltoolforevaluatingthenutritionalstatusofgastriccancerpatientswithperitonealdissemination,andisanindependentprognosticfactorforthesepatients.

  • 标签: 营养指数 预后 腹膜 胃癌 肿瘤防治中心 中山大学
  • 简介:<正>InthispaperwedisscustherelativeindexfortheAtiyah-Patodi-Singertypeellipticboundaryvalueproblems,asanapplicationwegiveanewapproachtothepairingbetweentherelativeK-homologyandK-cohomology.

  • 标签: RELATIVE index BOUNDARY VALUE PROBLEM K-homology
  • 简介:Basedupon3widelyusedbasemodels,atotalof8ADA/GADAsiteindexmodelswerederived.Thedataforthesemodelsinthisstudywereobtainedfrom79pith-splitstemanalysisplotsandtheestimationmethodwas"indicatorvariableapproach".Weusedbothfitstatisticsandvisualanalysistoselectthebest-fitmodel,andattachedmoreimportancetothevisualanalysis.Acomprehensiveapplicationanalysiswasalsogiventotheselectedmodel.Theresultsshowed:1)GADAoutperformedADAwithrespecttopredictions.2)AGADAmodelderivedfromHossfeldⅣpresentedthebestpredictionability.Itwassuggestedthatthemodelbeusedtopredictdominantheightandtoestimatesiteindexforponderosapinestandsranging30-200yearsinBritishColumbia,Canada.3)Thebestsiteindexagewasageof100years,baseduponrelativeerrorsofpredictions.

  • 标签: SITE INDEX model GENERALIZED ALGEBRAIC DIFFERENCE
  • 简介:Lightpropagationinnanoparticle-loadedencapsulantsissimulatedbasedonthemethodofMonteCarlo,referringtothemultilayergraded-refractive-indexstructureforLEDencapsulants.Andtheinfluenceofscatteringcoefficientonthetransmittanceisanalyzed.Theresultsshowthatthetransmittancedecreaseswithscatteringcoefficient.Foragivennumberoflayers,theencapsulantswillyieldmaximumtransmittanceiftherefractiveindexvalueofeachlayerisoptimized.Thenanoparticle-loadedencapsulantconsistsofmultiplelayerswithrefractive-indexvaluesthatgraduallydecrease.Thetransmittancewillbehigherthanthatoftraditionalnon-gradedencapsulants,andwillimprovelightextractionefficiencyofLED.

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  • 简介:Keerqin沙土地位于在向东北平凡、内部的蒙古之间的过渡地面(42°41′-45°15′N,118°35′-123°30′E)在东北Chinaand,它被沙漠化严重影响。根据地球表面的配置和生态环境,植被,赤裸的砂土的职业比率和土壤质地的范围被使用地调查数据作为评估索引选择。Keerqin沙的沙漠化的评估索引系统被使用遥感数据建立,并且赤裸的砂土的职业比率被混合光谱模型获得。这个索引系统被域调查数据验证,结果显示它对Keerqin的thedesertification评估合适。

  • 标签: 含沙土壤 遥感技术 荒漠化 生态环境 水土流失
  • 简介:TheadsorptionanddiffusionofNatomsonthethreelow-indexCuplaneswerestudiedusing5-parameterMorsepotential(5-MP)method,andthebesttheory-experimentagreementwasobtained.NatomsofCu(100)surfacesitonthefourfoldhollowsitewiththeverticalheightof0.018nmcloselycoplanarwiththetopmostcopperlayer,andthefourCu-Nbondlengthsare0.182nmandthefifthCu-Ndistanceis0.199nm.ForCu(111)system,theexistenceofaberrantCu(100)reconstructedstructureisapprovedathighercoverage,andatlowcoveragethestructureisalmostanidealCu(111)surfacestructure.WithrespecttoCu(110)system,theNatomsareadsorbedatLBandH3sites,notatSBsite.ThediffusionpassageanddiffusionbarrierofadsorbedNatomswerealsostudied.

  • 标签: 氮原子 铜低指数表面 吸附理论 扩散理论 势能面
  • 简介:Torealizecontent-basedretrievaloflargeimagedatabases,itisrequiredtodevelopanefficientindexandretrievalscheme.ThispaperproposesanindexalgorithmofclusteringcalledCMA,whichsupportsfastretrievaloflargeimagedatabases.CMAtakesadvantagesofk-meansandself-adaptivealgorithms.Itissimpleandworkswithoutanyuserinteractions.Therearetwomainstagesinthisalgorithm.Inthefirststage,itclassifiesimagesinadatabaseintoseveralclusters,andautomaticallygetsthenecessaryparametersforthenextstage-k-meansiteration.TheCMAalgorithmistestedonalargedatabaseofmorethantenthousandimagesandcompareitwithk-meansalgorithm.Experimentalresultsshowthatthisalgorithmiseffectiveinbothprecisionandretrievaltime.

  • 标签: 图象数据库 数据恢复 聚类支撑 自适应算法 指数算法
  • 简介:Objective:Patientswithheadandneckcanceroftensufferfrommalnutrition.Thisstudyaimstoinvestigatetheinfluenceofbodymassindex(BMI)ontheprognosisoflaryngealsquamouscellcarcinoma(LSCC).Methods:Atotalof473patientswithLSCCinitiallytreatedatSunYat-senUniversityCancerCenterbetweenJanuary2005andJuly2009wereretrospectivelyreviewed.SurvivalanalysiswasperformedbytheKaplan-MeiermethodandCoxregressionmodel.Results:LowBMIbeforetreatmentwassignificantlyassociatedwithpooroverallsurvivalinpatientswithLSCC(P<0.001).BMIwasanindependentprognosticfactorforpatientswithLSCC.Conclusion:LeannessbeforetreatmentwasassociatedwithpoorprognosisinpatientswithLSCC.GoodnutritionalstatusisfavorabletoimprovesurvivalinpatientswithLSCC.

  • 标签: 鳞状细胞癌 预后 治疗 质量指数 COX回归模型 价值
  • 简介:Potexperimentsandfieldtrialswereconductedtoinvestigatethechangesintrichloroaceticacid(TCA)solublesilicon(Si)intheleavesofrice(OryzasativaL.)andtoexaminethefeasibilityofusingTCA-solubleSicontentasanindexfordiagnosingSideficiency,TheTCA-solubleSicontentwassignificantlyhigherintheleavesofbothSi-treatedand-untreatedriceattheelongationstagecomparedwiththatattilleringstage,ItwashigherintheSi-treatedplantsthaninthecontrolsthroughoutthewholegrowthperiod.However,whetherdressedatelongationorbootinstage,siliconfertilzerresultedinasignificantincreaseinTCA-solubleSioneweektotendaysafterapplication,ThesamewastrueforthetotalSiaccumulationintheplants.AcolsepositiviecorrelationwafoundbetweenTCA-solubleSiandtotalSiinPlantsgrownonpotsoils(r=0.669,P<0.01,n=26).TheresultsobtainedinthefieldtrialsrevealedthattheavailableSiextrctedbysodiumacetate(pH4.0)couldnotpreicttheresponseofricetoaddedSiinthecalcareoussoilssatisfactorily.NosignificancorrelationwasfoundbetweensoilavailableSicontentandriceyield,butTCA-solubleSiintheleafbladesofricewassignificantlycoorelatedbothwithriceyield(r=0.57,P<0.01,n=30)andwithtotalplantSi(r=089,P<0.01,n=30),Inisrecommendedthat,whth95percentconfidence,thecriticalvalueofTCA-solubleSiintheleavesofriceshouldbe52-57mgSikg^-1,abovewhichnopositiveresponseofricetoaddedSiwouldbeexpected.

  • 标签: 稻谷 可行性 三氯乙酸 硅利用率 溶解 硅肥