Определение
"Standardization"isdefinedas:"Inthesocialpracticeofeconomy,technology,science,andmanagement,theTheformulation,releaseandimplementationofstandards(standards,regulationsandsystems,etc.)areunifiedtoobtainthebestorderandsocialbenefits."Datanormalizationistoconverttheoriginalmeasurementvalueintoadimensionlessvalue.Byscalingtheattributedataproportionally,theentirevaluerangeofagivenattributeismappedtoanewvaluerangethroughafunction,thatis,eacholdvalueisreplacedbyanewvalue.Thereare3standardizationstrategies.
StandardMethodOne
——Нормализиране на минимум-макс (мин-макс).
Minimum-Maxnormalizationmaintainstherelationshipbetweentheoriginaldata.IfthefutureinputfallsoutsidetheoriginaldatarangeofA,thismethodwillfacean"out-of-boundserror".
Нормативен метод два
——z-нормализиране на резултата
Whentheactualmaximumandminimumvaluesoftheattributefareunknown,ortheabnormalpointinfluencestheminimum-maximumnormalizationWhenthismethodisuseful.
Метод на нормализиране три
——Нормализиране на десетично мащабиране
DecimalscalingnormalizationisnormalizedbymovingthedecimalpointpositionofattributeA.