供应商选择层次分析法/随机数据包络分析法研究

供应商选择直接关系到供应链中核心企业的采购质量，影响到企业的市场竞争力，因此，研究供应商选择方法，具有重要的理论意义和实践意义。在研究供应商选择基本原则、分析供应商选择常用方法的同时。综合供应商选择的层次分析法(AHP)和数据包络法(DEA)，提出了供应商选择的AHP／随机DEA方法。通过引入随机变量，解决了数据包络分析中权重选择的不足之处，把选择供应商过程中的主观判断转变为可信度判断，提高供应商评价的可靠度。     

一种综合的供应商评价方法

针对供应链管理中供应商选择问题(VSP),尝试将综合AHP(层次分析法)、PCA(主成分分析)和DEA(数据包络法)3种方法应用在供应商评价中,避免传统的单个方法或2个方法的综合使用中各种方法本身的缺陷,尤其是解决由评价准则的相关性带来的重复评价和权值给定的客观性的问题.通过实例分析说明,与带偏好约束的AHP和DEA综合方法的评价结果进行了对比,AHP,PCA和DEA三者综合评价法能够有效降低评价的复杂程度,减少数据的冗余,可更加真实有效地反应供应商得分的实际情况,避免由于评价准则之间的相互关系所带来的重复评价问题.     

供应商选择的AHP/随机DEA方法

供应商选择直接关系到供应链中核心企业的采购质量,影响到企业的市场竞争力,因此,研究供应商选择方法,具有重要的理论意义和实践意义.文中研究了供应商选择基本原则,分析了供应商选择常用方法.综合供应商选择的层次分析法(AHP)和数据包络法(DEA),提出了供应商选择的AHP/随机DEA方法.通过引入随机变量,解决了数据包络分析中权重选择的不足之处,把选择供应商过程中的主观判断转变为可信度判断,提高供应商评价的可靠度.     

基于AHP/PROMETHEE/GAIA的供应商选择决策方法

供应商选择问题是企业界和理论界十分关注的决策问题．在分析已有的多准则决策方法局限性的基础上,提出了一种基于层次分析法、偏好顺序结构评估法与交互辅助几何分析法相结合的供应商选择方法．以质量、经济因素、技术水平、供应能力与响应能力因素作为候选供应商的评价准则,用层次分析法确定供应商选择问题的结构及其评价准则权重,用偏好顺序结构评估法对候选供应商进行最终的评价,用交互辅助几何分析法对其进行灵敏度分析,最后通过算例证明了该方法的有效性．     

敏捷供应链中供应商选择的AHP/DEA方法

针对敏捷供应链管理中供应商选择这一重要问题，考虑到网络技术和信息技术的发展所带来的企业可供选择的供应商越来越多以及处理选择供应商的数据越来越大的特点，迫切需要一个综合评价供应商的方法。分析了网络时代供应商选择的特点，结合层次分析法（AHP）和数据包络法（DEA）的优缺点，提出了一种选择供应商的AHP／DEA方法，并运用AHP／DEA方法对实例进行分析和计算，得到了满意的计算结果。     

一种基于目标规划的AHP参数学习算法

为提高采用层次分析(AHP)算法辅助采购决策问题的准确性,针对用户的最终选择与模型推荐结果的不一致,该文采用目标规划方法对AHP模型参数权重进行学习。通过理论分析和实例说明了算法的可行性,并将算法初步应用于某摩托车电子商务平台供应商选择决策支持系统。这种基于目标规划的AHP参数学习算法可通过多次学习积累采购者的评价习惯,弥补行业性电子商务平台一般性决策支持工具的不足,也可以用于其它决策支持领域相近问题。     

以数据包络分析法进行判断矩阵排序的AHP方法及其算例

文章介绍了利用数据包络分析法(DEA)获取层次分析法(AHP)中判断矩阵权重排序的方法,探讨了它的可行性.通过算例显示出该模型适用性广泛.同时,当准则含有决策者偏好时,传统的特征向量方法无法进行调整而显得无能为力.而改进了的运用公共权重计算的DEA方法可以体现出这种差异,从而反映了这种方法的优越性.     

数据包络分析法应用于判断矩阵排序的方法探究

文章介绍了利用数据包络分析法(DEA)获取层次分析法(AHP)中判断矩阵权重排序的方法,探讨了它的一致性、保序性等性质.例举的具体算例显示出该模型可广泛适用.同时,当准则含有决策者偏好时,传统的特征向量方法(EMV)无法进行调整而显得无能为力.而改进了的运用公共权重计算的DEA方法可以体现出这种差异,从而反映了这种方法的优越性.     

公路网规划方案综合评价方法

公路网规划方案评价是多层次、多目标的评价体系 ,应当从技术、经济、社会以及环境多方面进行定性、定量的综合评价。文章提供一种综合评价方法 ,即以二级模糊综合评判为框架 ,采用层次分析法 ( AHP)确定方案影响因素及子因素的权重 ,结合模糊决策中的无条件模糊优越集合理论建立模型。用此模型对某市公路网规划方案进行综合评价分析 ,取得了较好的效果。     

集成AHP/DEA模型及其应用

文章介绍了层次分析法(AHP)与数据包络分析(DEA)集成方法,并建立了多目标、多层次及多方案问题评价与决策模型,它以DEA为主体模型,以AHP为辅助模型,集两种方法的优点,可以客观地对多目标、多层次及多方案优选问题进行评价与决策.应用实例说明了模型与方法的有效性.     

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