軟測量模型生成系統(tǒng)研究與應用.pdf

1、南京工業(yè)大學碩士學位論文軟測量模型生成系統(tǒng)研究與應用姓名：郭慶武申請學位級別：碩士專業(yè)：控制理論與控制工程指導教師：張湜20031101ABSTRACTSoft—measurementisanewdevelopingandprospectingindustrytechnologywhichisnowgettingwidelyusedinindustryThemodelingandapplicationofsoftmeasuremente

2、ssentiallyisatimeconsumingenergy—consumingandcomplicatedworkInthepracticeofmodeling，iflackofspecialandstrongtools，technicianhavetoprogrameverypartofsoftmeasurementItnotonlyrequesttechnicianhavetheabilityofcomprehendingth

3、ealgorithmcorrelativebutalsotakesomuchtimeofthemthattheycall’tdevotetothedesignandimplementingofsoftmeasurementmodelsThusitishelpfultoownasetofsoftmeasurementmodelingt001toimprovethemodelingefficiencySomesoftsensorsarepr

4、ovidedintheformofsoftwareoverseas，whereasthesesoftsensorsareexpensiveverymuchSomeexpelsdomestichavedonea10tofworkontheorystudyandapplicationofsoftmeasurement，howevertherearefewsoftwareprovidedintheformofmerchandiseInaddi

5、tion，accordingtodocument，thoseSoftsensorsoverseasanddomesticemphasizeparticularlyonsomecertainmodelingmethod，whichhaven’tincludeothermodelingmethodsorprovideonlyalimitedfunctionItresultinusershaven’tthechancetochoosediff

6、erentmodelingmeⅡlodThephenomenamentionedaboveafrecttheapplicationandpopularizationofsoftmeasurementteehnologyinindustryprocesstosomeextentThereforeitisasignificanttopictodevelopamodelingsystemthatissimpletooperateandhass

7、ufficientfunctionsThedevelopingofasoftmeasurementmodelingsystemisstudiedinthethesisThemainfeaturesofthesystemdisplayasfollow：f1)Kindsofmethodstoselectsecondaryvariablesareprovided，suchasmanualselectingmethodandPCAmethod(

8、2)Sortsofdatapretreatmentmethodsaresupplied，suchas3占，averagefilteringandslicing(31kiridsofsoft—measurementmodelingmethodsarepresented，whicharemainlydividedintotwocategories：OneisregressionmethodconcretelyincludingMLRMSRa

9、ndPCRandsoon；theotherisneuralnetworkmethodincludingBPNandRBFN9kindsoffastertrainingalgorithmofBPNarepresentedbesidesthestandardsteepestdescentalgorithmThestructureofpresentingmanykindsofmodelingmethodsinthesystemmakeitpo

10、ssibletogainaidealmodelbycomparingandselectingdifferentmodelingmethodsThearrangementimprovedthestructureofsomesoftmeasurementsystemsthatemphasizeparticularlyonsomespecialmodelingmethod(4)ThemethodofintegratingPCAwithneur

11、alnetworkisalreadyreposedHoweveritisnotyetseentointegratethemethodinsoftmeasurementmodelingtoolsThemethodisactualizedinthesystem(5)Inordertoimprovethegeneralizationofmodels，“Earlystopping’methodisadoptedinthesystemThemet

12、hodovercomesthedisadvantageofsomesystemsthatpayattentiontofittingeffectofmodelsbutneglectgeneralizationofmodels(6)Theresultofmodelingisdisplayedandsavedintheformofgraphs、formulasandstatisticalfigureswhichprovidestandardf