一种基于投影的区间直觉模糊信息多属性决策方法

文章针对区间直觉模糊信息的多属性决策问题,提出了一种新的基于投影思想的决策方法。该方法首先定义了区间直觉模糊正、负理想方案以及决策方案在区间直觉模糊正、负理想方案上的投影等概念;然后对于属性权重信息不完全的情形,建立了一种基于投影的多目标规划模型以获得相应的权重,并利用区间直觉模糊数的加权算术平均(IIFWA)算子对评价信息进行集结,从而获得各个决策方案的排序和择优结果。文中给出一个实例分析,说明了该方法的有效性和可行性。     

基于三角模糊数权重信息不完全的多属性决策方法

针对属性值为三角模糊数且权重信息不完全的多属性决策问题,提出了一种基于三角模糊数权重信息不完全的多属性决策方法.该方法首先利用权系数的不完全确定信息,建立关于各方案综合三角模糊数与理想解和负理想解的加权距离优化模型,通过求解优化模型得到各属性权重值,之后根据各方案到相对理想解的贴近度的大小进行排序.实例分析表明了该方法的有效性和可行性.     

权重信息不完全的梯形模糊数多属性决策

针对权重信息不完全且属性值为梯形模糊数的模糊多属性决策问题,给出了基于梯形模糊数质心的多属性决策方法,并通过投影法建立了非线性规划模型,通过数学软件得到各属性权重,并通过质心横坐标与纵坐标在虚拟理想方案上的投影率的乘积作为排序指标,进行排序择优.最后通过实例说明了该方法的有效性.     

基于模糊理想点的模糊多属性决策方法

针对属性权重信息完全未知或只有部分权重信息且属性值为三角模糊数的模糊多属性决策问题,提出3种基于模糊理想点的最优化决策模型.通过对这3种模型的求解,获得属性的权重,给出相应的对方案进行排序和择优的决策方法,从而为解决权重信息不完全的模糊多属性决策问题提供新的途径.     

信息不完全确定的区间直觉模糊多属性决策方法

针对属性权重信息不完全确定且属性值为区间直觉模糊数的多属性决策问题,建立一个基于加权精确度函数的多目标线性规划模型来获取属性权重信息,然后求得每个方案的加权精确度函数,进而根据方案加权精确度函数对方案进行排序,最后通过算例分析说明该方法是有效和实用的.     

基于期望值的区间直觉模糊多属性决策方法及其应用

研究属性权重信息完全未知和部分已知,且属性值和对方案的偏好值均为区间直觉模糊数的多属性决策问题.基于偏差极小化的思想,利用区间直觉模糊得分函数构造优化模型,计算属性权重,然后利用区间直觉模糊数加权平均算子对区间直觉模糊信息进行集结,根据得分函数和精确函数对方案进行排序.最后,通过一个实例说明了该方法的合理性与有效性.     

属性权重信息不完全的区间数多属性决策方法

针对属性权重信息不完全且属性值以区间数形式给出的多属性决策问题,提出了一种逼近于理想点(TOPSIS)的决策分析方法.首先对属性权重信息不完全的区间数多属性决策问题进行了描述;然后依据传统的,TOPSIS方法的基本思路,给出了解决属性权重信息不完全的区间数多属性决策问题的计算步骤,其核心是通过构建并求解二次规划模型,得到每个方案与正理想点、负理想点的差异值,进而计算出每个方案与理想点的相对接近度,即可得到所有方案的排序结果. 最后通过给出一个算例说明了该方法.     

一类模糊属性值的多属性决策问题的排序方法

研究了属性权重信息完全未知且属性值以三角模糊数形式给出的不确定型多属性决策问题．利用模糊数数据的变异系数来度量三角模糊属性值之间的差异程度,给出了求解属性权重的简洁公式和一种基于可能度的决策方案排序方法．     

基于信息熵和灰色系统理论的区间直觉模糊多属性决策

针对方案属性值为区间直觉模糊数,且属性权重信息完全未知的多属性决策问题,提出了一种基于信息熵的区间直觉模糊熵和灰色关联分析的决策方法。为全面考虑各评价属性权重信息完全未知的情形,首先,利用改进的区间直觉模糊熵确定属性权重,在有效减少评估信息流失的同时,还能真实反映决策者的意愿;然后,依据灰色关联分析理论推演得到灰色关联度公式,结合属性权重计算各方案分别与正、负理想解的灰色关联度;最后,确定各方案的相对关联度,并依此对各方案进行排序。通过信息系统评估的代表性实例分析,验证了所提出方法的可行性和有效性。     

基于信息熵的区间直觉模糊多属性决策方法

对属性权重信息完全未知且属性值为区间直觉模糊数的多属性决策问题进行了研究,定义了区间直觉模糊数的得分函数,进而提出了一种基于信息熵的区间直觉模糊多属性决策方法,最后通过实例分析说明了该方法有效、可行而且计算简单．     

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     

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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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has