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1、NatureandScience,1(1),2003,FuandFu,ApplyingPPEModelBasedonRAGAApplyingPPEModelBasedonRAGAintheInvestmentDecision-MakingofWaterSavingIrrigationProjectThefinancialsupportprovidedbyNational“863”High-TechniqueProgramme(No.2002AA2Z4251-210041).QiangFu,HongFuSchoolofWaterConservancy&Civil
2、Engineering,NortheastAgriculturalUniversity,Harbin,Heilongjiang150030,China,fuqiang100@371.netAbstract:ThroughapplyingPPEmodelbasedonRAGAintheinvestmentdecision-makingofwatersavingirrigationproject,thisstudyturnsmulti-dimensiondataintolowdimensionspace.Sotheoptimumprojectiondirectio
3、ncanstandforthebestinfluencetothecollectivity.Thus,thevalueofprojectionfunctioncanevaluateeachitemgoodornot.ThePPEmodelcanavoidjammingofweightmatrixinthemethodoffuzzysynthesizejudgement,andobtainbetterresult.Theauthorswanttoprovideanewmethodandthoughtforreaderswhoengagedininvestment
4、decision-makingofwatersavingirrigationandotherrelativestudy.[NatureandScience2003;1(1):57-61].Keywords:RAGA;PPE;watersavingirrigation;investment;decision-making61http://www.sciencepub.neteditor@sciencepub.netNatureandScience,1(1),2003,FuandFu,ApplyingPPEModelBasedonRAGA1.Introductio
5、nAtpresent,moreandmorewater-savingirrigationdemonstrationitemshavebeendevelopedbroadlyinmanyareas.Throughcarryingouttheseitems,wecanspreadsomewatersavingirrigationtechniquesaccordingtolocalconditions,andusethewaterresourcecontinually.InChina,governmenthasinvestedsomeitems.So,manyuni
6、tscompetetobid.Whichunitshouldbechosenbydecision-makingtoinvestingwillbeinfluencedbymanyfactors.Andthat,manyfactorscan’tbequantitativechangeentirely.Thus,howtomakingascientificdecisionisveryimportant(Yan,2000).Atpresent,themethodoffuzzysyntheticjudgementhasbeenappliedbroadly.Butthis
7、methodisshortofthebestcriterionofsystemevaluation,anditwillappearmanyerrorsorgiveusabnormalresult.Themethodofgivingweightsubjectivelyandgraysystemevaluationhasdefiniteartificialfactors.Theevaluatedmethodbasedonentropycalculatestheweightofeachindexaccordingtothemutationdegreeamongind
8、exes.Thismethodcana
