简介:Inordertoresearchthefieldsensingcharacteristicofthecarbonfibersmartmaterial,theTikhonovregularizationprincipleandthemodifiedNewton-Raphson(MNR)algorithmwereadoptedtosolvetheinverseproblemoftheelectricalresistancetomography(ERT).AnERTsystemofcarbonfibersmartmaterialwasdeveloped.Fieldsensingcharacteristicwasresearchedwiththeexperiment.Theexperimentalresultsshowthatthespecificresistancedistributionofcarbonfibersmartmaterialishighlyconsistentwiththedistributionofstructuralstrain.Highresistancezonerespondstohighstrainarea,andthespecificresistancedistributionofcarbonfibersmartmaterialreflectsthedistributionofsamplestrainincoveringarea.Monitoringbycarbonfibersmartmaterialoncomplicatedstrainstatusinsamplefielddomainisrealizedthroughtheoreticalandexperimentalstudy.
简介:AnoveltopologicalindexWFisdefinedbythematricesX,WandLasWF=XWL.ThetopologicalindexWFbasedonthedistance-relatedmatrixofmoleculargraphsisusedtocodethestructuralenviron-mentofeachatom-typeinamoleculargraph.GoodQSPRmodelshavebeenobtainedforstandardformationen-thalpyofmethylhalides.Theresultindicatesthattheideaofusingmultiplematricestodefinethedistance-relatedmatrixtopologicalindexisvalid.
简介:Numericalsimulationofhot-presssinteringofnano-sizedceramicpowderswasintroducedbythecommercialfiniteelementcodeMSC.MARC.Thepowderplasticmodelandthethermo-mechanicalcoupledquadrilateralelementweredevelopedandadoptedinthesimulation.Themechanicalandthermalpropertiesofthenano-sizedaluminabasedpowdersweredetermined.Inaddition,theexperimentalresearchandnumericalsimulationofthesinteringprocessofdifferentinitialdensitieswerecarriedout.Thestressstateinsinteringofgreencompactswithdifferentinitialdensitieswasanalyzedbythedensificationtheory.Thereasonforthedensityfluctuationsofas-sinteredceramicbulkswasfoundout.
简介:Inthepresentstudy,aseriesofregenerationconditionsandtheregenerationmechanismofmodifiedlakesedimentbiochar(Fe-KOH/LSB)catalystsforlow-temperaturecatalytichydrolysisofcarbondisulfide(CS2)wereinvestigated.TheresultsshowedthatRm-WNAmethodhadthebestregenerationeffect.Underoptimalregenerationconditions,thesulfurcapacity(13.86mg[s]/g[catalyst])ofregeneratedFe-KOH/LSBwasclosetothatoffreshFe-KOH/LSB(14.88mg[s]/g[cataiyst]).Thewaterwashingprocesscouldwashawayasmallnumberofsulfatesandalargenumberofalkalinegroups.TG-DTAandDRTFIRresultsindicatedthatthenitrogensweepingprocesscoulddecomposeFe2(SO4)3intoFe2O3,whichpartiallyrecoveredthecatalyticandtheadsorptiveabilities.CO2-TPDresultsindicatedthatthealkalisteepingprocessoffer-OHgroups,furtherimprovingthecatalyticandtheadsorptiveabilities.After3times-regeneration,thesulfurcapacityofFe-KOH/LSBreached13.31mg[s]/g[cataiyst],indicatingthattheRm-WNAmethodhadgoodstabilityfortherecoveryofthecatalyticactivity.BET,XPSandXRDresultsrevealedthatthedecreaseofthesulfurcapacityforregenerationwasattributedtothedecreaseoftheadsorptiveabilitiesofCandSiO2.