简介:AimingtosolvethemisclassificationproblemsofunsupervisedpolarimetricWishartclassificationalgorithmbasedonFreemandecomposition,anunsupervisedPolarimetricSyntheticApertureRadar(SAR)Interferomery(PolInSAR)classificationalgorithmbasedonoptimalcoherencesetparametersisstudiedandproposed.ThisalgorithmusestheresultofFreemandecompositiontodividetheimageintothreebasiccategoriesincludingsurfacescattering,volumescattering,anddouble-bounce.Then,thePolInSARoptimalcoherencesetparametersareusedtofinelydivideeachofthethreebasiccategoriesinto9categories,andthewholeimageisdividedinto27categories.BecauseboththeFreemandecompositionresultandoptimalcoherencesetparametersindicatespecificscatteringcharacteristics,thewholeimageismergedinto16categoriesbasedonphysicalmeaning.Atlast,theWishartclusterisemployedtoobtainthefinalclassificationresult.Topreservethepurityofscatteringcharacteristics,pixelswithsimilarscatteringcharacteristicsarerestrictedtobeclassifiedwithotherpixels.Thefinalclassificationresultseffectivelyresolvethemisclassificationproblem,notonlythebuildingscanbeeffectivelydistinguishedfromvegetationinurbanareas,butalsotheroadiswelldistinguishedfromgrass.Inthispaper,theE-SARPolInSARdataofGermanAerospaceCenter(DLR),areusedtoverifytheeffectivenessofthealgorithm.
简介:特征选择(FS)目的将当在代表原来的特征保留合适高的精确性时,从一个问题领域决定一个最小的特征(属性)子集。当有许多success.RST的如此的一个工具启用数据相关性和独自用数据在数据集包含的属性的数字的减小的发现,不平的集合理论(RST)被使用了,不要求另外的信息。这份报纸在基于RST的途径后面描述基本想法,考察在这些想法上造的相关FS方法,并且分析象Quickreduct算法那样的更经常使用的基于RST的传统的FS算法,熵基于编校算法,和相对编校算法。一些在存在算法和我们的建议改进算法罐头的缺点克服这些缺点,这被发现。试验性的分析被执行了以便完成建议算法的效率。
简介:Objectivevideoqualityassessmentmethodsoftenevaluatealltheframesregardlessoftheirimportance.Forwirelessdistortedvideos,noteveryframehasthesamecontributiontothefinaloverallqualityduetothechannelfadingandinterference,whichmayleadtothecapacityvariationintemporal.Besides,withthecontentsimilarityanderrorpropagationpatternintemporaldomain,itispossibletoevaluatetheoverallqualitywithonlypartoftheframes.Inthispaper,ademonstrationisperformedtoshowthatthevideoqualitycanbeevaluatedwithreducedframesset(RFS),andastatetransitionmodelisproposedtoextracttheRFS.Atlast,avideoqualityassessment(VQA)methodiscarriedoutbasedonRFS.Comparedwithseveralstate-of-the-artmethods,ourmethodcanachieveasuitableaccuracywithlessframestobeprocessed.
简介:Featureselection(FS)isaprocesstoselectfeatureswhicharemoreinformative.Itisoneoftheimportantstepsinknowledgediscovery.Theproblemisthatnotallfeaturesareimportant.Someofthefeaturesmayberedundant,andothersmaybeirrelevantandnoisy.TheconventionalsupervisedFSmethodsevaluatevariousfeaturesubsetsusinganevaluationfunctionormetrictoselectonlythosefeatureswhicharerelatedtothedecisionclassesofthedataunderconsideration.However,formanydataminingapplications,decisionclasslabelsareoftenunknownorincomplete,thusindicatingthesignificanceofunsupervisedfeatureselection.However,inunsupervisedlearning,decisionclasslabelsarenotprovided.Inthispaper,weproposeanewunsupervisedquickreduct(QR)algorithmusingroughsettheory.ThequalityofthereduceddataismeasuredbytheclassificationperformanceanditisevaluatedusingWEKAclassifiertool.Themethodiscomparedwithexistingsupervisedmethodsandtheresultdemonstratestheefficiencyoftheproposedalgorithm.
简介:Theevaluationmethodanditsaccuracyforevaluatingcomplexsystemsareconsidered.Inordertoevaluateaccuratelycomplexsystems,theexistedevaluatingmethodsaresimplyanalyzed,andanewcomprehensiveevaluatingmethodisdeveloped.ThenewmethodisintegrationofDelphiapproach,analytichierarchyprocess,grayinterconnectdegreeandfuzzyevaluation(DHGF).Itstheoryfoundationisthemeta-synthesismethodologyfromqualitativeanalysistoquantitativeanalysis.Accordingtofuzzysetapproach,usingthemethodsofconcordanceofevaluation,redundantverify,doublemodelsredundant,andlimitationsofthemethodetc,theaccuracyofevaluatingmethodofDHGFisestimated,andapracticalexampleisgiven.Theresultshowsthatusingthemethodtoevaluatecomplexsystemprojectsisfeasibleandcredible.
简介:介绍了一种新的资源预留协议,能够增强智能光网络的性能.考虑在资源预留过程中,通过占用预留过程中的未使用带宽来传送大量非实时数据包.此协议通过修改后向预留协议来实现.在一个多跳的预留过程中,此协议将标记预留路径,而不是将其锁定.同时,已经被预留的节点在收到允许信号后,如果有单跳的非实时数据请求,就可以发送一定大小的包.在预留失败时,已经被允许的节点会收到一个信号,通知其不再传送数据包.
简介:TELNET是一种远程登陆的协议,可以直接通过TELNET协议登陆到远端的服务器上执行相应的命令,节约了维护成本。而目前往往需要定期对许多服务器设备定期做相同的检查或其他操作,如果手工依次登陆到各个服务器上执行,执行效率低,人力成本太高。本文提供了一种可以一键实现对服务器的定期检查,采用了SOCKET编程,实现一次将多条命令发给服务器执行,然后返回相应的执行结果。