基于满意度的可持续物流设施选址问题的多目标优化方法

【目的】为了研究可持续物流设施选址问题研究对企业供应链管理和物流配送服务中心的可持续性发展的影响。【方法】基于传统的无容量物流配送服务中心选址问题，引入满意度函数衡量客户对物流配送服务中心提供服务水平的平均满意程度，建立了以经济成本最小化、客户平均满意度最大化和二氧化碳排放量最小化为目标的一个多目标优化模型。【结果】基于多目标优化问题经典的ε 约束标量化方法和贪婪算法思想提出了多目标优化模型的一个求解算法。【结论】提出的多目标优化方法能够在较高的满意度下获得更优的经济成本和碳排放量，为更好地解决无容量物流配送服务中心选址问题提供了一个新的方法。     

供应链网络风险定量评估方法

从供应链网络结构出发,将网络中的风险分为"点中断风险"和"边中断风险";给出供应链网络向贝叶斯网络转换方法;对T企业供应链网络进行风险评估,计算该网络节点发生中断风险的概率和节点的重要度。     

缓解中断风险的应急供应链网络鲁棒优化

突发事件造成供应链环境的不确定,节点企业普遍暴露在风险下,任一节点失效会导致整个供应链服务水平降低。文章主要研究供应链网络中断风险下的鲁棒优化设计,将应急策略融入供应链网络设计中,建立了基于多场景、多时段、单一产品的鲁棒混合整数规划模型。通过算例对模型的有效性进行验证,探讨了决策者的风险态度和可变性权重对供应链网络设计的影响。文章从鲁棒性的角度研究中断供应链,为兼具效益和风险的供应链网络设计提供了一种有效的方法。     

港口企业集成供应链模型研究

从货源地到销售地的各个环节中，如何协调各个节点及供应链整体的最优一直都是港口供应链研究的难点和热点问题。本文以整体最优为出发点，从3个目标基础上建立一个港口企业的集成供应链多目标规划模型，通过该模型可以将影响港口效率及通过量的众多因素考虑在内，计算出各个节点的通过量已达到整个供应链的最优化。     

中断风险下易腐品多目标闭环供应链网络模型

在当今全球化和高度不确定的商业环境中,供应链网络容易遭遇设施中断、路径中断等多重中断风险。同时考虑到易腐品需求波动大、易损耗、退货率高、处理不当会污染环境等问题,以最小经济成本、最小环境影响、最大社会效益为目标,提出缓解中断风险的策略并构建了不确定条件下易腐品多目标闭环供应链网络模型。为了减少不确定参数的影响,实现最优设施选址与最佳配送路径的决策安排,将易腐品需求量和退货量设定为三角模糊值,采用模糊机会约束方法解决模型中的不确定约束问题。以上海市某易腐品企业为例,通过遗传算法和粒子群算法对模型进行求解。结果表明,采用缓解中断风险的策略可以显著改善供应链网络在中断情况下的表现,且相对于单目标优化,多目标优化整体表现更优。     

基于系统动力学的煤炭供应链碳减排研究

在“双碳”目标下，我国清洁能源开发和二氧化碳污染排放治理面临新的挑战，如何降低碳排放引起国家更高程度重视。以煤炭供应链为研究对象，在对其各阶段碳排放影响因素分析的基础上，依据各子系统因果关系构建煤炭供应链碳排放系统动力学模型，分析各变量变动对煤炭供应链各阶段及总碳排放影响，并运用Vensim PLE软件进行仿真。研究结果表明：所选3个变量均对供应链碳排放总量影响显著，且同一时间下新技术开发率、企业间信息共享程度均与供应链碳排放总量呈反向变动，煤炭交易价格与之相反，并结合模拟结果给出一些针对措施。     

基于港口集团式双扇型供应链的供需同步模型

基于港口实施纵向战略联盟下的港口集团式双扇型供应链基本结构模型,研究供应链供需计划同步问题,目标是考虑需求的不确定性,制定从供应商到客户整个港口纵向供应链系统同步的供应计划和需求计划.依据供应链系统中物流、信息流、成本流的流程,详细阐述供应计划和需求计划子模型的建立过程,在此基础上考虑需求不确定性,建立带有补偿问题的基于纵向联盟的港口供应链供需同步二级随机规划模型.     

带有固定区间的双代理排序问题

【目的】研究带有固定区间的双代理排序问题。【方法】第一个代理的工件加工过程可以中断，考虑两种机器类型：单台机器时考虑的目标函数为总权误工损失或总权提前损失；两台平行机时考虑的目标函数为总完工时间，同时必须在规定的固定区间加工第二个代理的工件，目标是在满足第二个代理目标的可行性前提下寻找一个使第一个代理的目标函数值更小的排序方案。【结果】设计了单台机器固定区间工件损失问题的排序算法，也为两台平行机总完工时间问题设计了相应算法。【结论】设计的算法可在多项式时间内得到解决，且证明了算法的最优性，并用数值实验说明了算法的可行性。     

生产中断风险下的供应链网络设计

主要研究生产中断风险下的供应链网络设计问题.基于超网概念和变分不等式的理论构建供应链网络模型,模型包括多个供应商和制造商并且考虑生产中断的风险对供应链中决策者成本、利润以及生产网络产能设计的影响.使用变分不等式的形式来表达网络均衡状态下的各个决策者的最优解.同时还提供了模型解存在性证明以及变分不等式函数的单调性证明.     

碳限额及交易下制造商低碳宣传的双渠道供应链决策与协调

在碳限额及交易下考虑碳减排技术投入和制造商低碳宣传,分别建立了零售商不参与制造商低碳宣传计划、参与制造商低碳宣传计划的分散式决策和集中式决策的博弈模型,并指出零售商分摊制造商碳减排成本和低碳宣传成本能够实现双渠道供应链协调.研究结果表明：在碳限额及交易机制下,碳减排率、低碳宣传水平和双渠道供应链利润都与消费者低碳偏好对需求的影响系数、低碳宣传中宣传零售商品牌元素对线上线下需求的影响系数、低碳宣传对线上线下消费者需求的影响系数成正向变化关系;碳减排率与碳排放交易价格成正向变化关系,双渠道供应链利润与碳排放交易价格成反向变化关系,而低碳宣传水平与碳排放交易价格成U变化关系;碳减排率、低碳宣传水平和双渠道供应链利润与碳减排成本系数成反向变化关系.     

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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