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1、【關(guān)鍵詞】多屬性決策區(qū)間粗糙數(shù)可能度偏好決策方法【英文關(guān)鍵詞】MultipleattributedecisionmakingIntervalnumberofroughPossibilitydegreePreferencesDecisionmakingmethods多屬性決策論文:基于區(qū)間粗糙數(shù)多屬性決策方法研究【中文摘要】多屬性決策的實(shí)質(zhì)是根據(jù)已有的屬性信息,通過(guò)一些科學(xué)方法或手段,對(duì)已知備選方案給出合理的決策。目前,多屬性決策的理論與方法應(yīng)用于諸多領(lǐng)域??陀^事物復(fù)雜多變、人類思維模糊,因此在實(shí)際的決策問(wèn)題中,決策信息常常以區(qū)間粗糙數(shù)的形式給
2、出,對(duì)于這類問(wèn)題的研究目前還比較少。利用可能度對(duì)區(qū)間粗糙數(shù)進(jìn)行比較的研究尚未見(jiàn)到。本文主要對(duì)屬性值為區(qū)間粗糙數(shù)的多屬性決策問(wèn)題進(jìn)行研究,主要工作如下:1.在區(qū)間粗糙數(shù)期望值定義的基礎(chǔ)上進(jìn)行改進(jìn),然后提出區(qū)間粗糙數(shù)方差的定義,并舉例說(shuō)明了方差的實(shí)際應(yīng)用,補(bǔ)充了期望值相等時(shí)區(qū)間粗糙數(shù)排序方法。2.補(bǔ)充了區(qū)間粗糙數(shù)的一些運(yùn)算法則、性質(zhì)和集成算子。使區(qū)間粗糙數(shù)理論更加完善。3.針對(duì)屬性權(quán)重信息不完全且屬性值為的區(qū)間粗糙數(shù)的多屬性決策問(wèn)題,定義了區(qū)間粗糙數(shù)可能度的概念,并研究了公式所具有的一些良好性質(zhì)。建立了基于投影思想的極小—極大優(yōu)化模型來(lái)確定屬性權(quán)
3、重。同時(shí)給出基于可能度矩陣的區(qū)間粗糙數(shù)排序方法。最后,數(shù)值例子說(shuō)明了方法的實(shí)用性和有效性。4.針對(duì)屬性值和對(duì)方案的偏好值均為區(qū)間粗糙數(shù)的多屬性決策問(wèn)題,為了使每個(gè)決策方案的屬性值更接近于偏好值,給出了基于投影思想的優(yōu)化模型來(lái)確定屬性權(quán)重。計(jì)算各方案的期望值,給出對(duì)方案有偏好的區(qū)間粗糙數(shù)多屬性決策方法。最后,通過(guò)實(shí)例說(shuō)明了方法的有效性和可行性?!居⑽恼縏heessenceofmultipleattributedecisionmakingistheknownalternativesgivesreasonabledecision,accordi
4、ngtotheattributeinformationandthroughthescientificmethodormeans.Atpresent,multipleattributedecisionmakingtheoryandmethodsareappliedtomanyareas.thingsarecomplexandchangeable,humanthinkingisfuzzy,sodecision-makinginformationisoftengivenintheformofintervalroughnumbersinpractic
5、aldecisionmakingproblems.Now,forthiskindofproblemresearchisstillrelativelylittle.Researchwhichusingpossibilitydegreeforintervalroughnumberswascomparedhasnotyettosee.Thispaperfocusesontheattributevaluesareintervalroughnumbermultipleattributedecisionmakingproblemsforresearch,
6、themainworkisasfollows:1.Intheintervalroughnumbersexpectedvalueisdefinedonthebasisofimprovement,thenproposedintervalroughvarianceisdefined,andanexampleisgiventoillustratetheuseofvariance,addedtothedesiredvalueofequalintervalroughnumberrankingmethod.2.Addedsomeoperationallaw
7、s,propertiesandaggregationoperatorofintervalroughnumbers.Theintervalroughnumbertheorywillbemoreperfect.3.Forthemultipleattributedecisionmakingproblems,whichincompleteinformationonattributeweightsandtheattributevaluesareintervalroughnumber.Definedintervalroughpossibilitydegr
8、eeconcept,andstudiedthattheformulahassomegoodproperties.Basedontheprojectionthough