服务销售系统供应链模型设计及其应用

研究了服务销售系统供应链模型,建立了不但具有选址、设施产品及市场顾客配置,还具有对于市场销路调控的供应链混合整数规划模型,并且设计了适用于这种混合整数规划供应链管理决策的遗传算法,最后对于报纸零售问题进行了供应链仿真计算·仿真结果表明,应用供应链模型对商业服务中设施选址、产品和市场顾客配置问题的进行优化,可以大大降低其零售过程中的销售成本·因此,如果能够结合实际问题作进一步的改进的话,此模型将具有很大的实用价值·     

具有柔性的供应链模型优化问题及其应用

研究了柔性供应链优化问题,确定了供应链总成本的结构,考虑了供应链生产和分销的各种约束条件,建立了柔性供应链优化模型,应用进化规划方法对一家农机公司柔性供应链模型进行了仿真,分析了总成本对柔性的敏感程度·结果表明,该模型采用生产能力柔性和分销能力柔性指标反映了生产和分销的不确定性,能够更综合地评价供应链的运作绩效,有助于设计出高效率、高效益的柔性供应链系统,而且对于数据量庞大的混合整数线性模型求解,进化规划方法是适用的·     

基于群体决策的库存选址-路径选择模型研究

将群体决策理论与VMI环境下库存选址-路径选择相结合,建立了基于群体决策的库存选址-路径选择模型．此模型将供应链敏捷度作为一个约束条件,使用群体层次分析法来确定该约束条件的系数,突破了以往纯粹靠整数规划或者混合整数规划的方法解决此类问题的思路,开辟了研究LRP问题的新途径．     

分片线性逼近在电厂机组负荷分配中的应用

机组负荷优化分配是电厂提高经济效益的一种重要手段,已经成为经济调度领域内非常受关注的研究课题．针对该问题中机组发电费用为凸函数的特点,利用分片线性逼近技术建立了一种新的0—1线性混合整数规划模型．该模型既保证了求解的精度,又避免了非线性混合整数规划问题难以确定全局最优解的缺点．文章最后用一个具体的数值仿真例子说明该方法的有效性．     

MRO服务中心多技能员工优化调度模型

MRO服务企业如何科学合理地调配资源直接影响收益.从MRO服务提供商视角,综合考虑员工旅行费用和工作时间成本,研究为分布于不同地理位置的客户的设备提供维修服务的多技能员工的优化调度问题,建立了以维修成本最小化为目标的多技能员工优化调度的非线性整数规划模型.根据整数变量的特点将非线性模型进行线性化,形成线性整数规划模型,进而使用ILOG CPLEX优化软件进行编程求解.通过具有不同参数特征的大量仿真实验案例,验证了模型的合理性和有效性.     

考虑多维不确定性的生物能源供应链优化设计研究

生物能源产业可以一定程度上解决能源紧张、缓解秸秆烧荒带来的环境污染等问题.不断变化的外部情况对生物能源供应链的优化设计提出了挑战,其应能对市场需求和原料供应等外部条件的波动具有更强的适应性.将供应链运作过程中可能面临的多种不确定性要素纳入到模型中,建立了混合整数规划模型.模型以期望利润最大化为目标函数,决策精炼厂选址、...     

云服务下终端顾客偏好的销售物流成本模型

为减少企业的销售物流成本,提出云服务下基于顾客偏好的销售物流计划模型.通过建立云销售平台及在销售平台内嵌入基于云计算的数据挖掘模型来挖掘用户偏好,为用户提供个性化的物流服务.针对价格敏感和时间敏感的消费者,建立销售物流计划混合整数规划模型,包括物流资源固定时顾客购买模型、一般物流运输计划模型以及区分用户偏好的物流运输计划模型.利用ILOG CPLEX优化软件求解,总物流成本和缺货成本分别降低12.8%和17.1%.研究结果表明:云服务下基于顾客偏好的销售物流计划能够有效降低企业销售物流成本.     

单抓钩周期性排序模型及其启发式算法

为了解决印刷电路板化学处理的排序问题,给出了一个新的单抓钩周期排序的混合整数规划模型,并针对该模型提出了结合线性规划模型的启发式算法．示例表明,该方法可以在短的计算时间内产生合理的排序,在适当条件下,混合整数规划模型可以结合搜索和线性规划模型以求得近似解     

炼钢－连铸最优炉次计划模型与算法

对钢铁厂炼钢－连铸计划与调度中的炉次计划建立了一个最优炉次计划混合整数规划模型．为了用遗传算法求解这一带约束条件的混合整数规划模型，提出了一种染色体的构造策略和交叉、变异方法，解决了迭代过程中满足可行性要求的问题，经用实际数据进行计算，表明所给模型和算法是有效的．     

计及深度调峰辅助服务与多典型日的年度发电计划优化模型

在调峰市场背景下,机组调峰成本与辅助服务费用对发电企业影响较大,据此,提出了计及深度调峰辅助服务与多典型日的年度发电计划优化模型。在场景获取方面,提出了考虑负荷与风电耦合的典型场景聚类方法,有效解决了月内多个典型日场景的模拟问题。在模型方面,考虑了深度调峰成本、辅助服务补偿费用、售电利益与碳交易成本,建立了发电企业参与深度调峰辅助服务市场的收益约束,确保市场各主体能从中获利。考虑到该模型属于非线性混合整数规划模型,结合线性化策略和CPLEX求解器实现了高效求解。最后,基于修正算例系统进行了仿真分析,验证了所提模型的有效性。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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     

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