虚拟企业生产能力约束下的集成化生产决策

供应链管理是对企业决策思维方式最直接、最深刻的影响,基于此环境的虚拟企业是21世纪企业发展的主要竞争模式,论文针对其运作方式,提出了生产决策中对市场需求和供应链上各节点企业资源信息进行集成的一般模型及生产决策优化方法。     

企业集成中的供应链建模、优化、计划和执行

论述了企业信息集成、过程集成到企业集成的发展趋势,给出了企业供应链管理的定义与需求,探讨了基于ＡＲＩＳ的供应链管理的建模方法和基于ＳＡＰ／Ｒ３的供应链管理优化、计划和执行的方法,并给出了供应链管理的实例。     

基于Web Services的动态供应链研究

针对企业供应链组链及资源集成方便存在的不足,提出一种基于Web Services技术的动态供应链框架,即对Web Services技术及其实施模式进行研究后,结合企业供应链的特点给出了动态供应链的组链模式及资源集成过程,论述了组链的过程及资源集成方式。     

供应链协同知识创新的决策研究

首先综述了供应链协同的知识创新;接着将供应链中的知识抽象描述为联结各个节点企业的知识流序列,并得出结论:①供应链节点企业应该加强相互合作,实现知识的共享,以减少对知识的搜寻时间;②供应链节点企业需要通过知识转移和知识整合即时更新知识;③由于知识集合更新速度的加快,要求供应链成员在协同的基础上,不断地进行知识创新,提高供应链的知识水平与竞争力.在此基础上,针对供应链协同知识创新决策所涉及的多属性群决策问题,提出基于模糊多属性群决策模型的供应链协同知识创新的决策过程;最后通过算例,说明了决策模型的应用步骤,并提出了进一步研究的方向.     

JIT环境下基于数量折扣的订货模型研究

针对上游供应链厂商提供数量折扣情况, 将传统采购中的数量折扣同JIT采购结合起来,建立了一个基于数量折扣的综合订货模型。模型探讨了在典型的JIT采购方式“一次订购多次送货”的基础上,针对上游供应链厂商提供数量折扣安排的情况,供应链下游厂商如何选择最优的订货策略：将订货量、送货时点以及送货量作为决策变量,考虑允许缺货且各送货区间需求不确定的情况,运用遗传算法对问题进行求解,并给出了数值算例。     

基于双向期权的食品供应链三阶段订货契约模型

为了降低食品供应链需求不确定的风险,提高食品供应链的整体柔性,针对食品的特性,将双向期权引入食品供应链中,建立了一个单周期三阶段供应链期权型契约模型,考虑了食品零售商在第三阶段补充订货问题,并对在各阶段的最优决策给出了量化结果以及经济意义解释.最后,通过算例对模型进行了模拟分析,结果表明,这种期权型契约以及补充订货策略对降低食品供应链风险,提高供应链利润是行之有效的.     

基于MAS的提前期对供应链库存系统动态特性的影响

基于MAS(Multi-Agent System)的系统建模与仿真方法建立了供应链库存系统的MAS模型,给出了供应链节点企业Agent的决策模型,并在Swarm平台上针对提前期对供应链库存系统动态特性的影响进行了仿真研究,验证了供应链库存系统的需求放大现象,并发现了供应链库存系统也存在需求缩小现象.     

需求分布未知条件下的供应链鲁棒主从对策

研究了需求不确定条件下的供应链鲁棒主从对策问题.考虑了未知需求分布信息条件下的两级供应链系统.其中,制造商作为主方,决定产品批发价格;零售商作为从方,决定产品订货量.这一问题又被称为需求分布信息的期望值问题.推导了仅知需求均值和方差信息条件下,集成供应链和分散供应链鲁棒订货量与批发价格决策,分析了该决策下的供应链系统及其成员利润情况.最后进行了数值计算,验证了当已知需求具体分布时供应链鲁棒主从对策的有效性.结果表明:对于集成供应链来说,采取鲁棒订货策略将损失一定数量的利润;而对于分散供应链来说,采取鲁棒主从对策策略将使供应链总利润得以提高.     

需求不确定性下供应链的配置

文章主要对不确定性需求下供应链配置过程中供应商选择问题进行研究.建立了需求不确定性下最小化供应链总成本的配置模型,使得供应链总成本与服务时间这两个因素得到有效的权衡.既能为企业提供供应链配置相关的决策支持,又能有效缓解供应链中需求不确定性所带来的经营压力,对实际问题具有很好的指导意义.     

需求依赖价格时供应链的协调契约与最优决策

针对随机需求依赖价格的情况,由限制性退货契约和销售回扣契约构成的联合契约,能够确保供应链协调.然后,在加法和乘法需求模式下,当随机需求分布具有递增的失败率,供应链存在唯一最优的定价-订购联合决策,并给出最优决策的解析表达式.最后,通过数值算例验证了本文结论的有效性.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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