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:Inthispaper,aplasmonicsrefractiveindexsensorwiththesemiring-stubsystemcoupledtoabuswaveguideispro-posed.Thestructurecanachievewavelengthbandtunableandultra-sharpFanoresonance.Thecouplingmechanismbetweenthebrightmodeanddarkmodeisinvestigatedindetail,andapparentplasmoninducedtransparency(PIT)isrealizedontheresonancewavelength.Thefullwidthathalfmaximum(FWHM)oftheresonantwavelengthismodulatedbyadjustingthecoupleddistance.Thesensitivityandfigureofmerit(FOM)oftheproposedsensor'canreachupto600nm/RIUand120onthevisibleregion,respectively,andthisperformancecanbehelpfulfordesigningthephotonicintegratedcircuitandopticalcommunication,inaddition,itcanbeappliedforbio-sensing.
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.
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.
简介:Basedupon3widelyusedbasemodels,atotalof8ADA/GADAsiteindexmodelswerederived.Thedataforthesemodelsinthisstudywereobtainedfrom79pith-splitstemanalysisplotsandtheestimationmethodwas"indicatorvariableapproach".Weusedbothfitstatisticsandvisualanalysistoselectthebest-fitmodel,andattachedmoreimportancetothevisualanalysis.Acomprehensiveapplicationanalysiswasalsogiventotheselectedmodel.Theresultsshowed:1)GADAoutperformedADAwithrespecttopredictions.2)AGADAmodelderivedfromHossfeldⅣpresentedthebestpredictionability.Itwassuggestedthatthemodelbeusedtopredictdominantheightandtoestimatesiteindexforponderosapinestandsranging30-200yearsinBritishColumbia,Canada.3)Thebestsiteindexagewasageof100years,baseduponrelativeerrorsofpredictions.
简介:Lightpropagationinnanoparticle-loadedencapsulantsissimulatedbasedonthemethodofMonteCarlo,referringtothemultilayergraded-refractive-indexstructureforLEDencapsulants.Andtheinfluenceofscatteringcoefficientonthetransmittanceisanalyzed.Theresultsshowthatthetransmittancedecreaseswithscatteringcoefficient.Foragivennumberoflayers,theencapsulantswillyieldmaximumtransmittanceiftherefractiveindexvalueofeachlayerisoptimized.Thenanoparticle-loadedencapsulantconsistsofmultiplelayerswithrefractive-indexvaluesthatgraduallydecrease.Thetransmittancewillbehigherthanthatoftraditionalnon-gradedencapsulants,andwillimprovelightextractionefficiencyofLED.
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.
简介:Torealizecontent-basedretrievaloflargeimagedatabases,itisrequiredtodevelopanefficientindexandretrievalscheme.ThispaperproposesanindexalgorithmofclusteringcalledCMA,whichsupportsfastretrievaloflargeimagedatabases.CMAtakesadvantagesofk-meansandself-adaptivealgorithms.Itissimpleandworkswithoutanyuserinteractions.Therearetwomainstagesinthisalgorithm.Inthefirststage,itclassifiesimagesinadatabaseintoseveralclusters,andautomaticallygetsthenecessaryparametersforthenextstage-k-meansiteration.TheCMAalgorithmistestedonalargedatabaseofmorethantenthousandimagesandcompareitwithk-meansalgorithm.Experimentalresultsshowthatthisalgorithmiseffectiveinbothprecisionandretrievaltime.
简介:Objective:Patientswithheadandneckcanceroftensufferfrommalnutrition.Thisstudyaimstoinvestigatetheinfluenceofbodymassindex(BMI)ontheprognosisoflaryngealsquamouscellcarcinoma(LSCC).Methods:Atotalof473patientswithLSCCinitiallytreatedatSunYat-senUniversityCancerCenterbetweenJanuary2005andJuly2009wereretrospectivelyreviewed.SurvivalanalysiswasperformedbytheKaplan-MeiermethodandCoxregressionmodel.Results:LowBMIbeforetreatmentwassignificantlyassociatedwithpooroverallsurvivalinpatientswithLSCC(P<0.001).BMIwasanindependentprognosticfactorforpatientswithLSCC.Conclusion:LeannessbeforetreatmentwasassociatedwithpoorprognosisinpatientswithLSCC.GoodnutritionalstatusisfavorabletoimprovesurvivalinpatientswithLSCC.
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.