具有模糊系数的多目标模糊正项几何规划的解法

多目标几何规划是解决一些最优化问题的强有力工具,当问题中的参数为模糊数时,目标值也应该是模糊数。本文提出求解系数是模糊数的多目标模糊正项几何规划的算法,首先利用线性加权的方法将问题转化为单目标模糊正项规划问题,再利用Zadeh的扩张原理与对偶原理将单目标模糊正项规划问题转化为两个普通的正项几何规划。     

具有模糊系数的多目标模糊正项几何规划的解法(运筹学与控制论)

多目标几何规划是解决一些最优化问题的强有力工具,当问题中的参数为模糊数时,目标值也应该是模糊数。本文提出求解系数是模糊数的多目标模糊正项几何规划的算法,首先利用线性加权的方法将问题转化为单目标模糊正项规划问题,再利用Zadeh的扩张原理与对偶原理将单目标模糊正项规划问题转化为两个普通的正项几何规划。

     

区间直觉梯形模糊几何Bonferroni平均算子及其应用

研究了决策信息为区间直觉梯形模糊数且属性间存在相互关联的多属性群决策问题,提出一种基于区间直觉梯形模糊几何加权Bonferroni平均算子的决策方法.基于区间梯形直觉模糊数的运算法则和几何Bonferroni平均算子,定义了区间直觉梯形模糊几何Bonferroni平均算子及其加权算子.给出了这些算子的一些性质,建立基于区间直觉梯形模糊几何加权Bonferroni平均算子的多属性群决策模型.最后,将该方法应用在供应商选择的群决策问题中,结果表明了该方法的有效性与可行性.     

模糊多目标规划在制定最优竞标方案中的应用

【目的】针对已有文献提出的一类工程项目的招投标问题,给出了一种使用模糊多目标规划技术进行建模以制定最优竞标方案的方法。【方法】将投标方在利润上的基本目标及招标方所提出的对项目目标的要求作为必须满足的约束来处理,并将最大化投标方所获利润、项目质量等级、安全性能、环境性能,最小化投标方工程成本、项目所需时间作为模型目标函数。【结果】通过对每个目标函数引入分段线性满意度函数,建立了模糊多目标规划模型,并采用加权求和法进行求解。文中给出了具体实例以详细说明建模及求解的过程。【结论】模糊多目标规划技术可以为制定最优竞标方案提供有力工具。
     

模糊多目标规划在制定最优竞标方案中的应用

【目的】针对已有文献提出的一类工程项目的招投标问题,给出了一种使用模糊多目标规划技术进行建模以制定最优竞标方案的方法。【方法】将投标方在利润上的基本目标及招标方所提出的对项目目标的要求作为必须满足的约束来处理,并将最大化投标方所获利润、项目质量等级、安全性能、环境性能,最小化投标方工程成本、项目所需时间作为模型目标函数。【结果】通过对每个目标函数引入分段线性满意度函数,建立了模糊多目标规划模型,并采用加权求和法进行求解。文中给出了具体实例以详细说明建模及求解的过程。【结论】模糊多目标规划技术可以为制定最优竞标方案提供有力工具。     

基于模糊折中规划的稳健多目标优化设计

针对稳健设计目标函数与波动之间的冲突及协调问题,提出了一种基于模糊折中规划的稳健设计多目标优化方法. 该方法在考虑工程稳健设计中大量存在的模糊因素的前提下,建立目标函数以及波动的隶属度函数,利用模糊偏好分配每个目标的权重从而均衡目标函数值和波动之间的平衡. 该方法将决策者的偏好充分体现到决策过程中,从而得到决策者所期望的折中解. 从实例结果可以看出,模糊折中规划适合于求解稳健优化设计问题.     

基于知识测度的区间直觉模糊多属性群决策方法

针对现有的区间直觉模糊熵未能全面体现区间直觉模糊集所包含的信息,从而会导致相关熵应用的多属性群决策出现偏差这一问题,提出了一种基于知识测度的区间直觉模糊多属性群决策方法.首先,利用扩展的区间直觉模糊知识测度确定属性权重;然后,利用区间直觉模糊加权算术平均算子集成信息,得到各备选方案的综合属性值,进而用得分函数对方案进行排序.最后通过一个实例表明了提出方法的合理性和有效性.     

一种结合主客观偏好的区间直觉模糊多属性决策方法

针对决策者的偏好信息和决策矩阵元素均为区间直觉模糊数的多属性决策问题,提出了一种新的决策方法．该方法通过求解主观偏好与客观偏好的总绝对偏差最小,同时各方案综合属性值差距最大的双目标规划模型,得到属性的最优权重向量．并基于IIFWA算子对区间直觉模糊信息进行集结,进而根据得分函数和精确函数对方案进行排序．最后,通过实例证明了该方法的有效性和实用性．     

模糊多目标可靠性优化设计的遗传算法

给出模糊多目标可靠性优化设计的一个遗传算法.该方法利用模糊集隶属函数的特性将各子目标函数模糊化处理为能够反映各子目标相对重要程度,具有加权指数的协调满意度函数形式;通过加权函数将各子目标的协调满意度函数综合成统一的单目标优化模型,用遗传算法求解模型.通过实例验证该方法的有效性.     

基于确定可能性均值法求解模糊随机双层规划问题

针对目标函数和约束函数中系数均为模糊随机变量的双层规划问题,基于模糊随机变量的期望值概念,将原模糊随机双层规划问题变形为一个模糊双层规划问题.采用模糊数的确定可能性均值对上下层目标函数进行去模糊化,利用基于可能性测度的模糊机会约束方法处理模糊约束函数,提出模糊随机双层确定可能性均值-机会约束规划模型,并给出其确定等价模型,再运用K次最好算法求解最终确定模型.最后通过数值例子验证了所提方法的可行性.     

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.     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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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