基于质量风险的易逝品供应链协同质量控制

以质量风险为基础,研究了易逝品供应链协同质量控制问题,考虑购买商质量评价信息隐匿、供应商质量预防信息隐匿以及两者都隐匿三种情况,基于供应商和购买商的质量风险分担水平分别构建了易逝品供应链协同质量控制的委托代理模型.通过优化决策出对供应商的质量缺陷惩罚水平和外部损失的分担份额,实现供应商和购买商追求自身收益最大的同时供应...     

动力电池回收的环境质量成本控制模型构建

针对新能源汽车普及化后将存在大量废弃动力电池对环境造成污染,提出废弃动力电池回收处理过程中的环境质量成本控制问题,运用委托代理理论和博弈分析,分别构建对称信息条件下废弃动力电池回收的环境质量成本控制模型,以及非对称信息条件下废弃动力电池回收商的单边道德风险环境质量成本控制模型和政府的单边道德风险环境质量检测成本控制模型,并运用Matlab对数值算例进行计算和分析.研究结果表明:在对称信息条件下,存在回收商和政府期望收益同时最优的环境质量成本预防水平和环境质量检测水平;在非对称信息情况下,无论回收商还是政府存在单边道德风险时,回收商在环境质量成本控制过程中,始终处于负收益状态,整个逆向供应链的联合期望收益也始终处于负收益状态.     

非对称信息对供应链质量成本决策的影响

研究了不同信息条件下供应链的质量成本决策问题 ,建立了对称信息和非对称信息下供应商和购买商的质量决策模型·其中 ,质量预防水平为供应商的决策变量 ,质量评价水平和质量损失惩罚是购买商的决策变量·分析了购买商的质量评价结果隐匿情况对供应商的质量预防决策和购买商的质量评价决策的影响 ,并进行了仿真计算·与对称信息的情况相比 ,当购买商的产品评价结果隐匿时 ,供应商的预防活动水平偏低 ,而购买商的产品评价活动更充分 ,直接导致供应链的质量预防成本降低 ,而质量评价成本增加     

供应链中的道德风险问题

研究了道德风险环境下供应链的质量投资决策问题,在B.Stanley所建立的供应商和购买商签约模型基础上,把供应商作为委托人和购买商作为代理人,同时考虑供应商和购买商收益的个人理性约束条件,建立了道德风险环境下供应链的质量投资决策模型,并进行了优化求解·最后,结合农机公司某种零件加工的道德风险问题进行了仿真计算·结果表明,在道德风险环境下购买商的质量评价投资水平和加工水平及供应商的生产投资水平都偏离了对称信息下的决策结果,其原因在于供应商的内部质量保证支付和外部质量保证支付不同·     

需求价格敏感情况下的寄售库存协作效益研究

针对单供应商和单购买商的二级供应链,通过数值方法,研究了完全信息及需求价格敏感情况下寄售库存(Consignment Stock,CS)协作对供应链系统收益的影响.假定供应商和购买商独立决策且完全理性,双方都力图使自己的收益最大化,在此基础上,双方最优的库存和定价策略将是Stackelberg博弈的结果,其中,供应商是领导者,购买商是追随者.结果表明,CS方式可以改善供应链协作,提高供应链系统效益,尤其是在价格弹性较小时,CS协作方式可以作为供应链协作的有效机制,而当价格弹性较大时,双方难以形成密切的伙伴关系.     

非对称信息条件下供应链管理质量控制策略

研究非对称信息条件下供应链管理的质量控制问题·建立了供应链合作关系中的购买商和供应商的质量成本模型,其中包括供应商的生产理性约束条件·分析了非对称信息条件下购买商与供应商质量成本的委托代理关系,质量水平的不可观测性则表现为供应商的信息隐匿·实质上,这是一个委托代理中的逆向选择问题·购买商的质量成本是目标函数,供应商质量成本的一阶条件转化为状态空间方程,运用极大值原理求解该问题的最优质量控制·并进行了非对称信息条件下供应链的质量控制仿真实验·     

成本信息共享下供应链成员收益的影响因素

针对由两个零售商和一个供应商组成的两级供应链,基于存在Bertrand竞争的两零售商的成本信息共享模型,研究了供应链中的零售商与供应商最优期望收益的影响因素及其灵敏度分析。结果表明:在各种信息共享组合下,各零售商的收益与零售商成本方差成正比例关系,与零售商所售产品的替代系数成反比例关系,与零售商间成本的相关系数成反比例关系;供应商的收益与零售商所售产品的替代系数成反比例关系。当信息共享存在时,供应商的收益与零售商成本方差、零售商间成本的相关系数成正比例关系。     

非对称信息下的三级建筑供应链质量控制决策研究

为研究不同信息条件下三级建筑供应链的质量控制决策,建立了质量控制三方———业主、总包商和分包商的质量控制决策模型。分析了对称信息下业主的质量监督水平、工程款支付和总包商的质量控制水平决策。以此为基础,分别探讨了单、双层非对称信息下三级建筑供应链的质量控制决策。在总包商的质量控制信息和分包商的质量预防信息隐匿情况下,运用极大值原理得出了业主的质量监督水平、工程款支付和总包商的质量控制水平的最优解。并结合算例对不同信息环境下的决策结果进行了比较。     

供应链质量控制模型构建的参数设置比较

针对供应链质量控制中的不确定性问题,改进已有质量参数离散情况下的供应链质量控制模型,进行质量参数连续情况下供应链质量控制模型的构建与求解.通过质量参数离散和连续情况下供应链质量控制模型的建模假设、建模过程及案例计算对比表明,质量参数连续情况下的供应链质量控制决策比质量参数离散情况下的供应链质量控制决策更能精确化地反映实际情况,降低了供应链质量控制的不确定性;实际中质量预防水平和质量检验水平分别随对应投入变化的趋势近似服从指数分布,可以为制造商决策最优质量预防投入、购买商决策最优质量检验投入提供支持和依据.     

零售商Bertrand竞争下的供应链成本信息共享价值

为了研究当零售商间存在竞争时的供应链信息共享价值,基于单供应商、两零售商的两层供应链中成本信息共享的模型,研究了两个零售商间存在B ertrand竞争时,零售商与供应商间的成本信息共享价值问题,分别讨论了两个零售商都共享成本信息、只有一个零售商共享成本信息和两个零售商都不共享成本信息时供应链各成员的收益。结果表明:供应商总能从成本信息共享中获益;但成本信息共享使零售商的收益减少,零售商并不能自愿地向供应商共享其成本信息;然而完全的信息共享在一些条件下可以通过一定的合同机制,即供应商向零售商付一定的费用来实现。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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