Määritelmä
"Standardization"isdefinedas:"Inthesocialpracticeofeconomy,technology,science,andmanagement,theTheformulation,releaseandimplementationofstandards(standards,regulationsandsystems,etc.)areunifiedtoobtainthebestorderandsocialbenefits."Datanormalizationistoconverttheoriginalmeasurementvalueintoadimensionlessvalue.Byscalingtheattributedataproportionally,theentirevaluerangeofagivenattributeismappedtoanewvaluerangethroughafunction,thatis,eacholdvalueisreplacedbyanewvalue.Thereare3standardizationstrategies.
StandardMethodOne
——Minimi-Max(min-max)normalisointi
Minimum-Maxnormalizationmaintainstherelationshipbetweentheoriginaldata.IfthefutureinputfallsoutsidetheoriginaldatarangeofA,thismethodwillfacean"out-of-boundserror".
Normatiivinen menetelmä kaksi
——z-pisteiden normalisointi
Whentheactualmaximumandminimumvaluesoftheattributefareunknown,ortheabnormalpointinfluencestheminimum-maximumnormalizationWhenthismethodisuseful.
Normalisointimenetelmä3
——Decimalscalingnormalisointi
DecimalscalingnormalizationisnormalizedbymovingthedecimalpointpositionofattributeA.