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不确定优化问题的若干模型与算法研究(3)

来源:网络收集 时间:2026-01-21
导读: statetocertaincanprogramming,buttheequivalenceofcertain betranslatedonlyin Asaoftenhascomplexform.Th

statetocertaincanprogramming,buttheequivalenceofcertain

betranslatedonlyin

Asaoftenhascomplexform.TheycanSoinespecialcaseandexamplesbeseenProposition1.3.2.basicstochasticmodel,chanceconstrainsmodelhastwodifficult.Oneis

tothatitonlypaidattention

referringthequantitysuch

thatthesolutionsettheprobabilityoffeasibilityfromthequalitative,notrecourseasmodelTheotherisaboutthemathcharacterisconvexonlywhentherandomvariablessatisfysomefine

theconvexconditionsTheexamples

importanttOin限44]showisnotkeptyet,whilewhichissolvingtheproblem。Soforthesakeofdisadvantage.someinvestigatorproposedintegratedchanceconstraintsmodelin1

islittleand970[38]。Buttherelevantresearchonly[44,45】areconsulted,thereasonofwhichmaybethecomplexityof

tOcomputingOntheotherhand,thismodelhasverygoodcharacterandisimportant

theriskresearch,economydecisioncontr01.Sowegiveemphases

Somekindsofdefinitiontoitinchapter2areexpandofintegratedchanceconstraintsmodelgivenin§2.1.

Definition

surplus2。1.3considersthesurplusandshortagetogether.Definitiontheresourceis:,7j(x,co)=max{0,Ⅳ。),thentheaveragesurplus£_?satisfyV

山东大学博士学位论文

£可i+E,7j=El叩,{.Theindividual

i=1,2,…,m,andtheintegratedchanceconstraintsis:Er/(sa,EIq,{,jointintegratedchanceconstraintsis:E(q,-,i…l

fl,.In

acceptvalue

andrm)≤口Thisdefinitionovercomesthedifficultyoftakingvaluefordefinition2.1.4[7],conditionsety∈[O,00)isexpectationintroducedtorepresentthemaximumofE【(77一)1叩<0],definingEr/,一≤y P(q,<0)solution

isX4(y)≥{x∈R“,Eq7≤y-E11.1).It'srationalityisgiveninthisarticle.

Subsequentlythecharacterofthismodelisdiscussedin§2.2,whichincludingtheconvexityofsolutionset,continuumanddifferentiabilityofrestrictionfunctionunderthepreconditionthatrestrictionfunctionis

expandingoflinearconditionconvexaboutvariable.Asthein[44],themainresultis:

Theorem2,2.3Forstochastic

isaprogramming:rain{f(x):g(x,09)≥O,x∈D},Dconvexfixed,closed,finiteset,g(x,甜)isaboutxandeachrandomvariablesarsfyingE(co,)<∞,then:

g(x)=E[g(x,CO)一】is

finitediscretedistribution

forcontinuousdistributionfinite、nonnegative,convexandLipschitscontinuous.Forpiecewiselyconvexof(a(CO),b(CO)),g(x)isof(a(CO),b(CO)),g(x)is

set.Forfunction.andcontinuousanddifierentiable.Sox(f1)={x∈R”:季(x)≤卢)isconvexg(x,oJ)=∑臼,(∞扛;一6(∞),thereis

掣生:日一2ajxsgn(g(x)一)],删。oveLOX

!i墨塑二譬型:日(∑nq(曲)巧)一]^呻4^。—ii。。

Thetheoremaboveisbasingforalgorithmlater,thentheorem2.2.5givestheLagrange

recourseproblemofthismodel,indicatingthat£(五)isequivalentorto(simple)publishingmodel,。Inresearchaboutriskfinance[45,471,theequivalenceisgottenby

ofourtranslatingtheWhentheevaluatingwayofriskvalue.whichisconsistentwitIlthatworkrecoursecoefficientishard

atodeterminate,Occ(卢))candescribethewordmoreaccuratelyandoffernewmethodforcomputing.

orIn§2.3,§2.4,assumingtherandomvariablesobeyfinitediscretecontinuous

distributionrespectivelywehavedesignedthealgorithms.Thehybridintelligentalgorithm2.3isgiven,basedonthestructurecharacterofsolutionset(theoremVIII

山东大学博士学位论文

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