简介:这篇论文在波动的环境下面探讨定价和库存补充策略的同时的决心。明确地,我们分析单个条款,周期的评论模型。需求由二部分组成:确定的部件,被价格影响,和随机的部件(不安)。随机的部件的分发由外长的Markov链的当前的国家被决定。在任何给定的时期被控告的价格能动态地被指定。一份补充订单可以被放在一些时期或所有的开始,并且无存货是充分backlogged。订是更低的semicontinuous,并且库存/积压事物的费用或剩余)与多项式生长是连续的费用。有限地平线、无限地平线的问题被处理。最佳的政策的存在被建立。而且,optimality(s,S,p)当订的费用由组成时,类型政策被证明修理,比例的费用部件和剩余花费了(这些费用都是州依赖者的)是凸的。关键词随机的库存管理-Markov链-定价-有限地平线-无限的地平线2000苏布杰克特先生分类90B05-90B06由国家天赋支持了中国的科学基础(号码70621061,号码70890082,号码70671100)并且北京交通的科学基础大学(2007RC014)。
简介:Inthispaper,thejointproductionandrecyclingproblemisinvestigatedforahybridmanufacturingandremanufacturingsystemwherebrand-newproductsareproducedinthemanufacturingplantandrecycledproductsareremanufacturedintoas-newproductsintheremanufacturingfacility.Boththebrand-newproductsandremanufacturedproductsareusedtosatisfycustomerdemands.Returnsofusedproductsthatarerecycledfromcustomersareassumedtobestochasticandnonlinearlyprice-dependent.Amathematicalmodelisproposedtomaximizetheoverallprofitofthesystemthroughsimultaneouslyoptimizingtheproductionandrecyclingdecisions,subjecttotwocapacityconstraints?themanufacturingcapacityandtheremanufacturingcapacity.BasedonLagrangianrelaxationmethod,subgradientalgorithmandheuristicalgorithm,asolutionapproachisdevelopedtosolvetheproblem.Arepresentativeexampleispresentedtoillustratethesystem,andmanagerialanalysisindicatesthattheuncertaintiesindemandandreturnhavemuchinfluenceontheproductionandrecyclingpolicy.Inaddition,twentyrandomlyproducedexamplesaresolved,andcomputationalresultsshowthatthesolutionapproachcanobtainverygoodsolutionsforallexamplesinreasonabletime.
简介:Anewintelligentcontrolmetholforweldingpositionerispropsed.ApplyinganimprovedfuzzycontrollerandavariablePIDcontroller,atwo-modeintelligengcontroller(TMICC)isdsignedonbasisoffuzzylogicadnrules.Thesimulationandexperimentalresultsshowthatthiscontrolsystemcanobtainbetterdynamicandstaticcharacteristics.
简介:众多的实验研究证明那个做广告的努力能在两个现在和将来的时期刺激需求,并且在定价之间有一个相互作用,为决定做广告并且订。这些决定怎么并且什么与对方一起交往在定价上做广告并且订的效果是决定?理解这个相互作用,我们考虑在一个稳定的市场卖一个容易腐烂的产品并且动态地决定联合的订,定价和做广告的策略的一个书报摊贩类型公司。这个问题与做广告的carryover效果和价格敏感的需求作为一个无限的地平线书报摊贩问题被建模。我们描绘最佳的定价,做广告并且盘点策略和他们的比较静电干扰,并且考虑没有做广告的效果,这条政策怎么不同于传统的途径。我们证明最�
简介:Mostinventoryresearchesassumethatproductionlevelcanfluctuatearbitrarily.However,largefluctuationoftheproductionlevelinmanyfirmsmaybemuchcostly.Thispaperaddressesthecoordinatingpricingandinventorycontrolprobleminaboundedproductionsystemwithuncertainyield,inwhichtheproductionlevelisconstrainedbetweenamaximumandminimumlevelineachperiodandthepricecanbeadjusteddynamically.Weshowthattheoptimalpolicyistheintervalbase-stock-list-pricepolicy.Also,westudytheimpactoftheproductionboundsanduncertaintyoftheyieldontheproductionsystem.Numericalexperimentsarealsoperformedtostudytheimpactofparametersonthesystem.
简介:Retailpriceandpromotionaleffortaretwoimportantparametersonwhichdemandofacommoditylargelydepends.Thispaperdevelopsandanalyzesatwo-echelonsupplychainwheremarketdemanddependsonbothretailpriceandsaleseffort.Thecentralizedmodelisstudiedasthebenchmarkcase,andthewholesaleprice-onlycontractisstudiedasthebasecaseinwhicheachentitytriestomaximizeitsindividualprofit.Differentcontractmechanismsareimplementedtooutperformthebasecaseintermsofbothtotalchain'saswellasindividualprofits.Comparisonsamongthecoordinatingcontractsareprovidedsothatanyentitymaychoosethebetteronefromavailablecontractsafterthecontractparametersarenegotiated.Themodelisextensivelyexaminedthroughanumericalexample.