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1、可控变质率下基于商业信用的易逝品库存优化模型魏广明秦娟娟王坤张茜天津财经大学经济学院天津财经大学商学院摘要：论文考虑产品保鲜技术投入对易逝品变质率的影响，并在商业信用支付模式下，探讨了采购商的最优订货策略及技术投入策略。首先，分两种情形构建了采购商的最优库存模型;其次，通过理论推导，求解采购商的最优订货周期、最优订货量及其最优技术投入策略;最后，通过数值分析对文章中的定理结论进行了验证,并对有关参数进行了灵敏度分析。研究发现，当保鲜技术投资对产品变质率有较强影响时，采购商保鲜技术投资较低，最优订货周期延长;当产品的自然变质率增
2、加时，采购商为了降低变质率会增加保鲜技术投资量，总利润会减少；当供应商给予采购商的商业信用期增加时，最优保鲜技术投资量和最优订货周期减小。关键词：商业信用;技术投入;易逝品;库存优化;作者简介：秦娟娟（1983-），女（汉族），河南平顶山人，天津财经大学商学院，副教授，研究方向：物流与供应链管理，E-mail:tjufeqin@163.com.收稿日期：2016-06-14基金：国家自然科学基金资助项目（71302115,71502123）InventoryOptimizationModelofPerishableProduc
3、twithControlledDeteriorationRateunderTradeCreditWEIGuang-mingQINJuan-juanWANGKunZHANGXiEconomi^^hooLjri^nJllLlMiyex^iiyoOlnance&Economics;BusinessSchool,TianjinUniversityofFinance&Economics;Abstract：Manyfirmssellingtheperishableproductsadoptthetradecreditstrategy;me
4、anwhile,theyemployacertaintechnologytoreducethedctcriorationrateoftheproducts.Therefore,inthispaper,theaffectionofthepreservationtechnologyinvestmentisconsideredtothedeteriorationrateoftheperishablegoods,todiscussthepurchaser'soptimalorderingstrategyandtechnologyinv
5、estmentstrategiesinthetradecreditpaymentmode.Firstofal1,accordingtothetradecreditperiodandtheorderingcycle,therclationshipbetweenthepurchascr，sinterestincomeandtheinterestpaymentsaredividedintothetwocases.Secondly,bytheoreticalderivation,theoptimalorderstrategiescan
6、beobtainedandgiveouttheoptimalpreservationtechnologyinvestmentstrategyisgivenout.Finally,thetheoremandtheconclusionsofthispaperareverifiedbythenumericalanalysis,andalsomakesensitivityanalysisofparameters.Itisfoundthat,whenthepreservationtechnologyinvestmenthasastron
7、ginfluenceonthedeterioratingrate,thepurchaserpreservationtechnologyinvestmentislowandtheoptimalordercycleisproIonged;whenthenaturaldctcrioratingrateoftheproductincreases，thepurchaserincreasestheinvestmentamountofpreservationtechnologyinordertoreducethedeteriorationr
8、ate,anditsprofitdecreases;whenthecreditperiodgivenbysuppliertoprocurementbusinessincreases,thefirm，soptimalpreservationtechnologyinvestmen
