简介:ToimprovethecurrentGISfunctionsindescribinggeographicobjectswithfuzziness,thispaperbeginswithadiscussiononthedistancemeasureofspatialobjectsbasedonthetheoryofsetsandanintroductionofdilationanderosionoperators.Undertheassumptionthatchangesofattributesinageographicregionaregradual,theanalyticexpressionsforthefuzzyobjectsofpoints,linesandareas,andthedescriptionoftheirformalstructuresarepresented.Theanalyticmodelofgeographicobjectsbymeansoffuzzyfieldsisdeveloped.Wehaveshownthatthe9-intersectionmodelproposedbyEgenhoferandFranzosa(1991)isaspecialcaseofthemodelpresentedinthepaper.
简介:一个模糊ARTMAP分类器为分类实验ofCBERS-2形象被采用。基本理论并且关于算法处理首先被介绍,在CBERS-2高决定形象上在Shihezi县与一个陆地使用分类实验列在后面。三个分类器被比较:最大的可能性分类器(MLC),错误背繁殖(BP)分类器,和模糊ARTMAP分类器。比较比MLC和BP的高为模糊ARTMAP分类器显示出可比较地更好的结果,与9.9%和4.6%的全面分类精确性。结果也证明模糊ARTMAP分类器在在CBERS-2形象上识别赤裸的土壤有更好的洞察力。
简介:本文阐明了地下空间资源评价的基本概念和原理,分析了影响天津市中心城区地下空间资源开发的自然因素,采用GIS心:综合评判模型对地下空间资源进行了评价。通过评价建立了地下空间资源数据库,完成了地下空间资源分布图,科学地反映和度量了地下空间可供开发利用的资源,为天津市地下空间综合利用规划编制提供了基础数据和科学依据。
简介:ThispaperdiscussestheseismicactivityinBeijingMunicipalityanditsadjacentareas(whicharereferredtoastheBeijingregioninthepaper).Byusingfuzzymathematics,thefactorscontrollingregionalcrustalstabilityaretransformedintofuzzyinformationandthenamodeloffuzzydiagnosisisestablished.AfuzzycomprehensiveevaluationofregionalcrustalstabilityintheBeijingregionismadeaccordingtotheseismicandgeologicalconditionsoftheregion.
简介:Onthebasisoftheresearchofthecartographicmodelsmadebytheauthorssomeyearsago,thispaperfurtherstudiestheestablishmentofcartographicfuzzymatrixtomaketheconceptsincartographye.g.,selection,deletion,mappinggeneralizationandimagetranformation,intosomeprecisemathematicalexpressions.
简介:Intheautomationofidentificationoflandscapefeaturesthevaguenessarisesfromthefactthattheattributesandparametersthatmakeupalandscapevaryoverspaceandscale.Inmostofexistingstudies,thesetwokindsofvaguenessarestudiedseparately.Thispaperinvestigatestheircombinationinidentificationofcoastlandscapeunits.Fuzzysettheoryisusedtodescribethevaguenessofgeomorphicfeaturesduetothecontinuityinspace.Thevaguenessresultedfromthescaleofmeasurementisevaluatedbystatisticindicators.Thedifferencesoffuzzyobjectsderivedfromdataatdifferingresolutions(insizefrom3×3cellsto25×25cells)arestudiedinordertoexaminethesehigher-orderuncertainties.
简介:Themethodsofdeformationanalysisandmodelingatsinglepointarerealizedeasilynow,butavailableapproachesdonotmakefulluseoftheinformationfrommonitoringpointsandcannotrevealintegrateddeformationregularityofadeformablebody.Thispaperpresentsafuzzycluseteringmethodtoanalyzethecorrelativerelationsofmultiplepointsinspace,andthenthespatialmodelforapracticaldangerousrockmassintheareaofThreeGorges,YangtzeRiverisestablished,inwhichthecorrelationofsixpointsinspaceisanalyzedbygeologicalinvestigationandfuzzysettheory.
简介:Tunedmassdampers(TMD)arewellknownasoneofthemostwidelyadopteddevicesinvibrationcontrolpassivestrategies.Inthepastfewdecades,manymethodshavebeendevelopedtofindtheoptimalparametersofaTMDinstalledonastructureandsubjectedtoarandombaseexcitationprocess,butmostofthemareusuallybasedonanimplicitassumptionthatallofthestructuralparametersaredeterministic.However,inmanyrealcasesthissimplificationisunacceptable,sorobustoptimaldesigncriteriabecomesaviablealternativetobettersupportengineersinthedesignprocess.InRobustDesignOptimization(RDO)approaches,indeedthesolutionmustbeabletonotonlyminimizetheperformancebutalsotolimititsvariationinducedbyuncertainty.MostofthecurrentlyavailableRDOmethodsarebasedonaprobabilisticdescriptionofthemodeluncertainty,evenifinmanycasestheyarenotabletoexplicitlyincludetheinfluenceofallthepossiblesourcesofuncertainties.Therefore,inthisstudy,afuzzyversionoftherobustTMDdesignoptimizationproblemisproposed.Theconsistencyofthefuzzyapproachisstudiedwithrespecttotheavailablenon-probabilisticformulationsreportedintheliteratureandanapplicationtoanexampleofarobustdesignofalinearTMDsubjectedtobaserandomvibrationsinthepresenceoffuzzyuncertainties.Theresultsshowthattheproposedfuzzy-basedapproachisabletogiveasetofoptimalsolutionsbothintermsofstructuralefficiencyandsensitivitytomechanicalandenvironmentaluncertainties.
简介:这份报纸论述了由与一个概念的水文学模型一起集成一个模糊聚类模型和神经网络预报框架的新分类即时洪水。一个模糊聚类模型被用来以洪水山峰和流量深度分类历史的洪水,并且概念的水文学模型为洪水的每个班被校准。背繁殖(BP)神经网络被从模糊聚类模型使用即时降雨数据和产量训练。BP神经网络为即时洪水事件提供了一个快速的联机分类。基于联机分类,水文学模型的一个适当参数集合自动地被选择生产即时洪水预报。不同参数集合连续地在因为即时降雨数据和联机分类结果的变化,预报过程的洪水被使用。建议方法论在辽宁省被用于大集水,中国。结果证明分类框架比传统的非分类的方法提供了更精确的预言。而且,在模糊聚类的不同索引重量的效果也被讨论。
简介:这篇论文为遥远地察觉到的数据,结果的分类的模糊的度被作为由一个常规算法与那作比较减少聚类的fuzzyc工具描述一个改进算法:也就是说,分类精确性被增加。这被在单个班的水平合并协变性矩阵而非假定全球的完成。从一个爱丁堡郊外的陆地封面的一个模糊分类的实验结果为聚类的fuzzyc工具证实了新算法的改进性能,特别地当模糊也在假定参考书数据被提供时。
简介:在这篇论文,一个新奇参量的基于模型的分解方法为变化时间的结构监视的结构的健康被建议。为这个目的,先进功能系列的时间依赖者汽车回归的动人的一般水准(FS-TARMA)技术被用来估计在参量的信号分解计划使用的参数和革新变化。另外,一个唯一的特征抽取和减小方法基于分解信号,已知的同样潜伏的部件(LC),被建议。为了在实验室评估建议方法,数字模拟和试验性的研究的效率,在变化时间的结构上被进行,在损坏的各种各样的类型被介绍的地方。模糊专家系统(FES)被用作一个分类工具当时,证明建议方法成功地识别不同结构的条件与另外的方法相比基于非减少、平常的特征抽取。
简介:Permittivityofaseafoamlayerisveryimportantininvestigatingoceanbrightnesstemperaturemodel.Atmicrowavefrequency,theRayleighmethodisdevelopedtoestimatetheeffectivepermittivityoftheseafoamlayer.TosimplifythetediouscalculationofseafoameffectivepermittivityatLband(1.4GHz),Pade’approximationisadoptedtofittheseafoameffectivepermittivitycomputedbytheRayleighmethod.Withthisfittingformula,anewbrightnesstemperaturemodelofseafoamlayerdefinedbycertaingeophysicalparameters,suchasairvolumefraction(AVF),seasurfacetemperature(SST),seasurfacesalinity(SSS)andthicknessoffoamlayerd,isgiven.Furthermore,thesensitivitiesofthebrightnesstemperaturemodeltoSST,SSS,dandAVFofaseafoamlayeratLbandarediscussed.Thesensitivitiesarerankedfrommosttoleastintheorder:(1)d;(2)AVF;(3)SSS;(4)SST.ThisresultindicatesthatthemeasurementerrorsofdandAVFhavesignificantimpactsontheretrievalsofSSSandSST.Withtheexperimentalbrightnesstemperaturedata,theSSSandAFVareretrievedbycostfunction.