济南市地下水水质模糊综合评价

水质评价是一个复杂的多因素评价问题.本文针对济南市地下水的实际特点,应用模糊综合评价模型,采用灰色关联度确定初始权蘑,然后根据严重超标污染因子的超标系数对初始权重进行修订的方法确定权重,对济南市地下水水质进行丁综合评价.评价结果表明:济南市地下水总体水质较好,但有的实测点存在严重的硝酸盐超标,水质为m级,评价结果与实际情况相符.     

基于群决策的基础设施可持续性影响因素评价

针对基础设施可持续性影响因素复杂,传统的可持续性评价方法难以客观评估基础设施可持续性影响因素的权重,构建了基于关联度的多属性群决策模型,引入综合权重修正矩阵,从信息偏差、一致性和信息熵三个方面对可持续性影响因素权重进行优化,并以实际项目数据为依据,通过实证分析验证了模型的有效性.该评价模型的应用有助于提高基础设施可持续性评价的客观性.     

基于协同理论的政府部门整合决策

基于协同理论提出了具有时间特性的多指标部门整合决策模型.通过对效益型评价指标以及成本型评价指标的规范化处理,得到部门与政务系统的协同性评价决策矩阵,在各整合方案对正负理想方案贴近度以及各个评价指标和各时段权重向量基础上,建立最小二乘法多指标优化模型.研究结果表明,该决策模型能够为政务系统部门整合决策提供理论指导,提高政务系统协同度.     

基于熵权法对长江水质的综合评价

以长江流域的水质为研究对象,应用熵权法对其进行量化评价,考虑多个样本间的联系,根据各项指标的差异程度,确定各指标的权重,可削弱异常值的影响,使评价结果更合理、准确。文章通过对长江近两年多的水质情况分析,根据各污染因子对水质的影响差异确定其权重,运用矩阵分析的方法建立了水质模糊综合评价模型,从而进行了水质多指标的综合评价。     

两种模糊评价法在饮用水水质评价中的应用分析

为科学、准确、迅速的评估巢湖流域饮用水中水源水的水质状况,选取了传统的模糊评价法和改进的模糊评价对庐江县湖库水系的六家自来水厂水源水的七项指标进行了水质评价。研究结果表明,采用传统模糊评价法得出其中五个水厂的水源水水质都属于Ⅰ类水,七桥自来水厂的评价结果下为Ⅲ类水。在改进的模糊评价法下六家自来水厂的评价结果均为Ⅰ类水,所有的六个水厂的水源水都符合饮用水水质标准。改进的模糊评价法采用了聚类权法,综合考虑了每个因子在每一个水质等级上对应的权重,使水质评价结果变得更加合理,该法更适合应用于巢湖流域农村饮用水水环境质量评估。     

基于VIKOR方法的钢铁企业大型设备维修方案决策模型

为准确评估钢铁企业大型设备的故障状况,推荐最优维修方案,建立了基于多源异构多准则折衷排序(Vise Kriterijumska Optimizacija Kompromisno Resenje, VIKOR)方法的大型设备维修方案决策模型.首先基于文献资料和专家经验构建主客观指标体系,主要包括大型设备状况、同类设备历史维修信息、维修团队的技术水平和维修条件等一级指标;然后针对多源异构信息,确定主观权重与客观熵权法相结合的综合指标权重;其次采用基于异构信息的VIKOR方法处理评价信息,得到钢铁企业大型设备维修方案的优先次序;最后通过钢铁企业大型设备维修方案的实例分析和灵敏度分析,验证多源异构VIKOR方法大型设备维修方案决策模型的可靠性和有效性.     

模糊灰关联综合评估在扣件式钢管支模架风险分析中的应用

针对评价指标标准值与评分值为模糊数的综合评估问题,将模糊数引入灰关联综合评估领域,提出了一种基于模糊数平面距离的多指标多层次灰关联综合评估方法.为了评估现场扣件式钢管支模架的施工风险,设计了一套多指标多层次的扣件式钢管支模架的施工风险评估系统.通过10个工程的问卷调查,确定了系统各评价指标的权重和评分值.借助于该评估方法,建立了扣件式钢管支模架施工风险评估体系.最后实例分析表明该方法和评估系统的正确性和有效性.     

基于变权重的水质综合评价体系

提出一套全新的水质综合评价体系——变权重水质综合评价体系。该变权重水质综合评价体系包括基于百分制的单因子评价方法、基于水质数据的动态因子权重确定方法以及两者结合形成的综合水质评价法。采用该评价体系对江苏中部某湖泊自动化水质监测站的水质监测数据进行单因子评价、因子权重计算以及综合评价,并对评价结果进行相关性分析。结果表明,变权重综合水质评价体系既可以突出某因子剧烈变化对评价结果的直接影响,又能全面反映综合水质状况,适用于评价高频率水质监测数据样本。     

加权综合教学评估模型的失效与改进

在多指标加权综合教学评估问题中,指标的不同权重实质上指示出这些指标处于系统的不同层次,因此不能“同层并论”.忽视不同权重指标处于不同层次这一实质性信息,会导致评估失效.改进的办法是采用基于联系数的系统态势排序进行综合评估,以充分利用不同权重指标的层次信息,得出符合实际的综合评估结论.     

投资者关系管理评价体系的网络层次分析方法研究

建立基于上市公司投资者关系管理(IRM)评价体系.利用网络分析理论(ANP),考虑指标之间的相互影响与制约关系,建立了指标非线性组合关系的多指标综合评价决策模型与算法,克服了传统的层次分析方法的指标线性组合的综合评价方法的不足,增加了指标权重的可行性与合理性.通过一个应用实例分析了该方法的可行性及合理性.     

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.     

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

正~~