简介：在这份报纸，模仿大聚类系数和在许多真实建筑群存在的模块化的结构的一个随机的派系网络模型联网，例如社会网络，人工的网络，和蛋白质相互作用网络，吗被联合Erd的随机的选择规则介绍?s和R.愠辀?辀吗？？

简介：Severalcriteriausedbyphysicisttoquantifytheratioofsignaltobackgroundarecompared.Theapproachfortakingintoaccounttheuncertaintyinestimationsofsignalandbackgroundisproposed.

简介：WepresentthepreliminaryresultsofourcodeOPAQS(opacitycalculationusingquantumstatisticalmodel)thatisbasedontheselfconsistentHartree-Fock-Slatermodelfortheaverageatom.Thecodeiscapableofperformingrobustcalculationsofaveragechargestate,frequency-dependentandmeanopacities.Theaccuracyoftheatomicmodelisverifiedbycomparingthecalculationsofaveragechargestatewithvariouspublishedresults.ThemonochromaticopacitiesforironcomputedatdifferentsetsoftemperaturesanddensitiesarecomparedwithLEDCOP.TheRosselandandPlanckopacitiesforironandaluminumarevalidatedwithsomestate-of-the-artcodes.Theresultsareingoodagreementwiththepublisheddata.

简介：SinceGibbssynthesizedageneralequilibriumstatisticalensembletheory,manytheoristshaveattemptedtogeneralizedtheGibbsiantheorytonon-equilibriumphenomenadomain,howeverthestatusofthetheoryofnon-equilibriumphenomenacannotbesaidasfirmaswellestablishedastheGibbsianensembletheory.Inthiswork,wepresentaframeworkforthenon-equilibriumstatisticalensembleformalismbasedonasubdynamickineticequation(SKE)rootedfromtheBrussels-Austinschoolandfollowedbysomeup-to-dateworks.TheconstructedkeyistouseasimilaritytransformationbetweenGibbsianensemblesformalismbasedonLiouvilleequationandthesubdynamicensembleformalismbasedontheSKE.Usingthisformalism,westudythespin-Bosonsystem,ascasesofweakcouplingorstronglycoupling,andobtainthereduceddensityoperatorsfortheCanonicalensembleseasily.

简介：

简介：Clustering,asapowerfuldataminingtechniquefordiscoveringinterestingdatadistributionsandpatternsintheunderlyingdatabase,isusedinmanyfields,suchasstatisticaldataanalysis,patternrecognition,imageprocessing,andotherbusinessapplications.Density-basedSpatialClusteringofApplicationswithNoise(DBSCAN)(Esteretal.,1996)isagoodperformanceclusteringmethodfordealingwithspatialdataalthoughitleavesmanyproblemstobesolved.Forexample,DBSCANrequiresanecessaryuser-specifiedthresholdwhileitscomputationisextremelytime-consumingbycurrentmethodsuchasOPTICS,etc.(Ankerstetal.,1999),andtheperformanceofDBSCANunderdifferentnormshasyettobeexamined.Inthispaper,wefirstdevelopedamethodbasedonstatisticalinformationofdistancespaceindatabasetodeterminethenecessarythreshold.ThenourexaminationoftheDBSCANperformanceunderdifferentnormsshowedthattherewasdeterminablerelationbetweenthem.Finally,weusedtwoartificialdatabasestoverifytheeffectivenessandefficiencyoftheproposedmethods.

简介：TheentanglemententropyofanacousticblackholeinaBose–Einsteincondensates(BEC)isderived,whichisassociatedwiththephononsgeneratedviatheHawkingmechanisminasonichole.ConsideringthedispersionrelationofaBEC,werecalculatetheentanglemententropyoftheacousticblackholebymeansofstatisticalmethodintwolimits.Wefindthattheentropyisstillproportionaltotheareaofeventhorizon,butwithacoefcientdependentontheinfraredcutof.

简介：Atmosphericconcentrationsofpolycyclicaromatichydrocarbons(PAHs)weremeasuredduringvariousseasonsatsixdifferentcities/locationsinQingdaoalongshore.TheannualaveragePAHsconcentrationrangedfrom16ng/m3(atacleancom-paredsite)to308ng/m3(inanindustrysite).TheaveragetotalparticulatePAHsconcentrationwas74.5ng/m3withahigherconcentrationofparticulatePAHsinwinter.Basedonayear-rounddataset,thesourcesofPAHsintheairofQingdaoweredrawnbyprincipalfactoranalysisandcorrelationanalysis.TheresultsindicatedthatvehicleemissionsandoilburningwerethemainsourceofPAHsinQingdaoalongshore.

简介：Ｅｆｆｅｃｔ　ｏｆ　Ｌａｎｇｅｖｉｎ　Ｓｔａｔｉｓｔｉｃａｌ　Ｆｌｕｃｔｕａｔｉｏｎｓ　ｏｎ　Ｈｅａｖｙ－ｉｏｎ　Ｉｎｄｕｃｅｄ　Ｆｕｓｉｏｎ　ＲｅａｃｔｉｏｎＥｆｆｅｃｔｏｆＬａｎｇｅｖｉｎＳｔａｔｉｓｔｉｃａｌＦｌｕｃｔｕａｔｉｏｎｓｏｎＨｅａｖ...

简介：ThegoalofthisstudyistoanalyzethestatisticsofthebackscattersignalfrombovinecancellousboneusingaNakagamimodelandtoevaluatethefeasibilityofNakagami-modelparametersforcancellousbonecharacterization.Ultrasonicbackscattermeasurementswereperformedon24bovinecancellousbonespecimensinvitroandthebackscattersignalswerecompensatedforthefrequency-dependentattenuationpriortotheenvelopedetection.ThestatisticsofthebackscatterenvelopeweremodeledusingtheNakagamidistribution.Ourresultsrevealthatthebackscatterenvelopemainlyfollowedpre-Rayleighdistributions,andthedeviationsofthebackscatterenvelopefromRayleighdistributiondecreasedwithincreasingbonedensity.TheNakagamishapeparameter(i.e.,m)wassignificantlycorrelatedwithbonedensities(R=0.78–0.81,p<0.001)andtrabecularmicrostructures(|R|=0.46–0.78,p<0.05).Thescaleparameter(i.e.,?)andsignal-to-noiseratio(SNR)alsoyieldedsignificantcorrelationswithbonedensityandstructuralfeatures.Multiplelinearregressionsshowedthatbonevolumefraction(BV/TV)wasthemainpredictoroftheNakagamiparameters,andmicrostructureproducedsignificantlyindependentcontributiontothepredictionofNakagamidistributionparameters,explaininganadditional10.2%ofthevarianceatmost.TheinvitrostudyshowedthatstatisticalparametersderivedwithNakagamimodelmightbeusefulforcancellousbonecharacterization,andstatisticalanalysishaspotentialforultrasonicbackscatterboneevaluation.

简介：Inrealmultiple-inputmultiple-output(MIMO)systems,theperfectchannelstateinformation(CSI)maybecostlyorimpossibletoacquire.Butthechannelstatisticalinformationcanbeconsideredrelativelystationaryduringlong-termtransmission.Thestatisticalinformationcanbeobtainedatthereceiverandfedbacktothetransmitteranddonotrequirefrequentupdate.Byexploitingchannelmeanandcovarianceinformationatthetransmittersimultaneously,thispaperinvestigatestheoptimaltrans-missionstrategyforspatiallycorrelatedMIMOchannels.Anupperboundofergodiccapacityisderivedandtakenastheper-formancecriterion.Simulationresultsarealsogiventoshowtheperformanceimprovementoftheoptimaltransmissionstrategy.

简介：Weconstructanewtypeofphoton-addedsqueezedcoherentstategeneratedbyrepeatedlyoperatingthebosoniccreationoperatoronanewtypeofsqueezedcoherentstate[FanHYandXiaoM1996Phys.Lett.A22081].Wefindthatitsnormalizationfactorisrelatedtosingle-variableHermitepolynomials.Furthermore,weinvestigateitsstatisticalproperties,suchasMandel’sQparameter,photon-numberdistribution,andWignerfunction.Thenonclassicalityisdisplayedintermsoftheintenseoscillationofphoton-numberdistributionandthenegativityoftheWignerfunction.

简介：

简介：Ｓｔａｔｉｓｔｉｃａｌ　Ｔｈｒｅｅｆｏｌｄ　ｎａｇｍｅｎｔａｔｉｏｎ　ｉｎ　２５　ＭｅＶ／ｕ　４０Ａｒ　Ｉｎｄｕｃｅｄ　ＲｅａｃｔｉｏｎｓＳｔａｔｉｓｔｉｃａｌＴｈｒｅｅｆｏｌｄｎａｇｍｅｎｔａｔｉｏｎｉｎ２５ＭｅＶ／ｕ４０ＡｒＩｎｄｕｃｅ...

简介：UsingtheFourierhelicaldecomposition,weobtaintheabsolutestatisticalequilibriumspectraofleft-andright-handedhelicalmodesintheincompressibleidealHallmagnetohydrodynamics（MHD）.Itisshownthattheleft-handedhelicalmodesplayamajorroleonthespectraltransferpropertiesofturbulencewhenthegeneralizedhelieityandmagnetichelieityarebothpositive.Incontrast,theright-handedhelicalmodeswillplayamajorrolewhenbotharenegative.Furthermore,wealsofindthatifthegeneralizedhelieityandmagnetichelicityhaveoppositesigns,thetendencyofequilibriumspectratocondenseatthelargeorsmallwavenumberswillbepresentedindifferenthelicalsectors.ThisindicatesthatthegenerMizedhelicitydominatestheforwardcascadeandthemagnetichelicitydominatestheinversecascadepropertiesoftheHallMHDturbulence.

简介：在这篇论文，有它比1大的参数的Chebyshev方程的答案被获得。解决方案的衍生物的起始的值是磁化的表达式，它为任何旋转量数字S是有效的。Chebyshev方程从当我们应付了海森堡模型时，获得的一个平常的微分方程被转变，以便计算磁化的所有三个部件，由许多身体格林在随机的阶段近似下面的功能。Chebyshev与比1被讨论大的争论工作。有他们比1大的参数的Chebyshev多项式有的这论文hows他们的物理申请。

简介：Thispaperdiscussesastatisticalsecond-ordertwo-scale(SSOTS)analysisandcomputationforaheatconductionproblemwitharadiationboundaryconditioninrandomporousmaterials.Firstly,themicroscopicconfigurationforthestructurewithrandomdistributionisbrieflycharacterized.Secondly,theSSOTSformulaeforcomputingtheheattransferproblemarederivedsuccessivelybymeansoftheconstructionwayforeachcell.Then,thestatisticalpredictionalgorithmbasedontheproposedtwo-scalemodelisdescribedindetail.Finally,somenumericalexperimentsareproposed,whichshowthattheSSOTSmethoddevelopedinthispaperiseffectiveforpredictingtheheattransferperformanceofporousmaterialsanddemonstratingitssignificantapplicationsinactualengineeringcomputation.

简介：The12C+13Csystemhasbeenstudiedextensively,becauseofthesimilarityoftheentrancechanneltotheastrophysicallyimportant12C+12Creaction[1??3].Untilnow,threedifferentmethodshavebeenexploitedtoperformthefusioncrosssectionmeasurementsfor12C+13CundertheCoulombbarrier:(1)measuringtheyieldofcharacteristicrays,(2)thetotal-rayyieldsusingNaIsummingdetectorsand(3)theactivityofthereactionresidue24Na(T1=2=15.0h).Recently,thefusioncrosssectionof12C+13Chasbeenmeasureddownto0.9nbthroughtheactivitymeasurementbyourgroup[4].Althoughthestatisticalmodelcalculationsinallthesethreemethodshavebeenroutinelyusedtoconverttheobservedpartialcrosssectionsintothetotalfusioncrosssections[5],thesystematicuncertaintyinducedbythestatisticalcorrectionshasnotbeenstudiedverywell.