简介：Currentresearchesonnodeimportanceevaluationmainlyfocusonundirectedandunweightednetworks,whichfailtoreflecttherealworldinacomprehensiveandobjectiveway.Basedondirectedweightedcomplexnetworkmodels,thepaperintroducestheconceptofin-weightintensityofnodesandtherebypresentsanewmethodtoidentifykeynodesbyusinganimportanceevaluationmatrix.Themethodnotonlyconsidersthedirectionandweightofedges,butalsotakesintoaccountthepositionimportanceofnodesandtheimportancecontributionsofadjacentnodes.Finally,thepaperappliesthealgorithmtoamicroblog-forwardingnetworkcomposedof34users,thencomparestheevaluationresultswithtraditionalmethods.Theexperimentshowsthatthemethodproposedcaneffectivelyevaluatethenodeimportanceindirectedweightednetworks.

简介：Cascadingfailuresoftenoccurincongestedcomplexnetworks.Cascadingfailurescanbeexpressedasathree-phaseprocess:generation,diffusion,anddissipationofcongestion.Differentfromthebetweennesscentrality,acongestionfunctionisproposedtorepresenttheextentofcongestiononagivennode.Inspiredbytherestartprocessofanode,weintroducetheconceptof'delaytime,'duringwhichtheoverloadednodecannotreceiveorforwardanytraffic,soanintergradationbetweenpermanentremovalandnonremovalisbuiltandtheflexibilityofthepresentedmodelisdemonstrated.Consideringtheconnectivityofanetworkbeforeandaftercascadingfailuresisnotcrackedbecausetheoverloadednodearenotremovedfromnetworkpermanentlyinourmodel,anewevaluationfunctionofnetworkefficiencyisalsoproposedtomeasurethedamagecausedbycascadingfailures.Finally,weinvestigatetheeffectsofnetworkstructureandsize,delaytime,processingability,andtrafficgenerationspeedoncongestionpropagation.Cascadingprocessescomposedofthreephasesandsomefactorsaffectingcascadepropagationareuncoveredaswell.

简介：ＳＯＭＥＮＥＷＣＯＮＳＴＲＵＣＴＩＯＮＳＯＦＣＡＲＴＥＳＩＡＮＡＵＴＨＥＮＴＩＣＡＴＩＯＮＣＯＤＥＳＦＲＯＭＳＹＭＰＬＥＣＴＩＣＧＥＯＭＥＴＲＹＹＯＵＨｏｎｇ；ＧＡＯＹｏｕ（ＮｏｒｔｈｅａｓｔＮｏｒｍａｌＵｎｉｖｅｒｓｉｔｙ，Ｃｈａｎｇｃｈｕｎ１３０...

简介：Asanadvancedprocessdetectiontechnology,electricalimpedancetomography(EIT)haswideapplicationprospectsandadvantagesinmedicalimagingdiagnosis.However,aseriesofissuesneedtobeaddressedbeforeapplyingEITforbedsidemonitoring.Medicaldiagnosisandbedsidemonitoringaredynamicmeasuringprocess,wherethepositionsofmeasuringelectrodesandtheshapeofthedetectedfieldarechangingdynamical.Duetotheinabilitytocopewiththechangeableelectrodepositionsandvariousdynamicfields,existingEITsystemsaremainlyusedforindustrialdetectioninconditionofstaticmeasurementandvisualization.Inthispaper,weinvestigatethedynamicmeasurementandvisualizationofhumanbreastinEITfield,describethedesignofthemeasuringsensorsystem,andexpoundthemeasuringprinciple.Themaincomponentofthehardwaresystemisabuiltinservoelectricalresistancetomographysensorwithcapacitiveslidingrod,whichcanadapttothecrowdofdifferentchestcontourandthechangeofchestshapeinthedynamicprocessofbreathing.Thecorrespondingmeasuringprincipleisextractingallreal-timepositionsofmeasuringelectrodes,thenobtainingthedynamicboundary,finallydividingthedetectionfieldrapidly.Experimentalresultsconfirmedthattheproposedsystemcanobtainreal-timelocationofboundarysensoranddynamicallysolvetheproblemofarbitrary-shapeboundarymeasurement.Theimagingresultsvalidatetheavailabilityofdesignedsensorsystemandtheeffectivenessofthecorrespondingmeasuringprinciple.

简介：Thispaperconsidersafirmthatsellsadurableproductwithagivenmarketpotential.Thepurposeofthefirmistomaximizeitsprofitbydetermininghowmuchcapacitytoinstallbeforethesaleshorizon,howmanyproductstoproduceinaccordancewiththecapacity,andhowmanyproductstosellbypricing.AppealingtoPontryaginmaximumprincipleincontroltheory,theauthorsobtaintheclosed-formsofalloptimaldecisionsthefirmshouldmake.Furthermore,theoptimalproductionrateandoptimalsalesratearebothequaltothedemandrate,whichiscausedbytheoptimalpricingpolicyduringthewholehorizon,andtheoptimalpricingpathisincreasingwiththecostofinstallingaunitofcapacity.Furthermore,numericalanalysisrevealsthevisualimpressionoftherelationshipoftheparameters.

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简介：Wefirstproposeaseriesofsimilaritymeasuresforintuitionisticfuzzyvalues(IFVs)basedontheintuitionisticfuzzyoperators(Atanassov1995).Theparametersintheproposedsimilaritymeasurescancontrolthedegreeofmembershipandthedegreeofnon-membershipofanIFV,whichcanreflectthedecisionmaker’sriskpreference.Moreover,wecanobtainsomeknownsimilaritymeasureswhensomefixedvaluesareassignedtotheparameters.Furthermore,weapplythesimilaritymeasurestoaggregateIFVsanddevelopsomeaggregationoperators,suchastheintuitionisticfuzzydependentaveragingoperatorandtheintuitionisticfuzzydependentgeometricoperator,whoseprominentcharacteristicisthattheassociatedweightsonlydependontheaggregatedintuitionisticfuzzyargumentsandcanrelievetheinfluenceofunfairargumentsontheaggregatedresults.Basedontheseaggregationoperators,wedevelopsomegroupdecisionmakingmethods,andfinallyextendourresultstointerval-valuedintuitionisticfuzzyenvironment.

简介：在他们被发射到市场以前，公司屏蔽新产品工程是极其重要的。到目前为止，许多途径为处理屏蔽产品革新的过程被开发了。由于不明确、含糊、不完全的信息以及考虑到新产品开发(NPD)的动态地复杂的过程，一条模糊语言学途径采用了语言学评价和fuzzy-set-based计算为屏蔽新产品是合理的。然而，如此的一条模糊语言学途径面对各种各样的缺点和限制，例如信息的损失，在考虑与不明确的主观判断等等上的人性有关的方面失败。这些缺点和限制导致窘境，即，它的对很困难相当并且精确屏蔽新产品工程。在这份报纸，我们建议比例的3元组的一个观点表示一个语言学评价和相关忽略信息，和为语言学评价的统一的保存偏爱的比例的3元组转变由在二个不同语言学术语集合之间的比例的3元组代表了。在这个基础上，为屏蔽新产品的模糊语言学表示模型投射的比例的3元组被开发。建议模型是灵活的处理与屏蔽新产品工程有关的不明确、含糊、不完全的信息，这被显示出。它不仅允许计算程序与不同信心层次表示他们的主观判断，而且也能处理不完全的语言学评价。最终，建议模型也改进屏蔽结果的精确和reasonability。

简介：Anefficientmethodfortheidentificationofinfluentialspreadersthatcouldbeusedtocontrolepidemicswithinpopulationswouldbeofconsiderableimportance.Generally,populationsarecharacterizedbyitscommunitystructuresandbytheheterogeneousdistributionsofout-leavinglinksamongnodesbridgingovercommunities.Anewmethodforcommunitynetworkscapableofidentifyinginfluentialspreadersthatacceleratethespreadofdiseaseishereproposed.Inthismethod,influentialspreadersserveastargetnodes.Thisisbasedontheideathat,ink-shelldecompositionmethod,out-leavinglinksandinnerlinksareprocessedseparately.Themethodwasusedonempiricalnetworksconstructedfromonlinesocialnetworks,andresultsindicatedthatthismethodismoreaccurate.Itseffectivenessstemsfromthepatternsofconnectivityamongneighbors,anditsuccessfullyidentifiedtheimportantnodes.Inaddition,theperformanceofthemethodremainedrobustevenwhentherewereerrorsinthestructureofthenetwork.

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简介：Earlyin1904,Hadamard[1]showedthescaleimplicitfunctiontheoremoffinitedimensions.Thenitwasgeneralizedtoinfinitedimensions.Inthispaperanewproofofthistheoremisgivenandtheuniqueexistenceoftheperiodicsolutionforaclassofordinarydifferentialequationsystemsatresonanceisobtained.

简介：Theoptimallyweightedleastsquaresestimateandthelinearminimumvarianceestimatearetwoofthemostpopularestimationmethodsforalinearmodel.Inthispaper,theauthorsmakeacomprehensivediscussionabouttherelationshipbetweenthetwoestimates.Firstly,theauthorsconsidertheclassicallinearmodelinwhichthecoefficientmatrixofthelinearmodelisdeterministic,andthenecessaryandsufficientconditionforequivalenceofthetwoestimatesisderived.Moreover,undercertainconditionsonvariancematrixinvertibility,thetwoestimatescanbeidenticalprovidedthattheyusethesameaprioriinformationoftheparameterbeingestimated.Secondly,theauthorsconsiderthelinearmodelwithrandomcoefficientmatrixwhichiscalledtheextendedlinearmodel;undercertainconditionsonvariancematrixinvertibility,itisprovedthattheformeroutperformsthelatterwhenusingthesameaprioriinformationoftheparameter.

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