基于逐层拉开档次法的电能质量综合评价

电力市场环境下,有效的电能质量评价方法十分重要.文中利用逐层拉开档次法进行主客观组合赋权,建立新的区域电网电能质量综合评价模型.首先将区域电网电能质量进行大系统和子系统的层次划分,设计出一套综合评价指标体系,并建立大系统和子系统综合评价函数;然后用序列综合法和拉开档次法确定各层系统的综合权重;最后由综合评价函数得出每层子系统以及大系统的综合评价值,实现区域电网电能质量综合评价.该模型自下而上地考虑和比较区域电网运行状态对综合评价结果的影响,实现了全面、细致、客观的综合评价,应用该综合评价模型对某供电局的变电站电能质量数据进行的实证分析和评价表明,该方法是有效的.     

恩施州农业土壤质量评价研究

通过对在土壤质量评价中关于确定评价因素鉴定指标、单因素评价以及综合评价等关键性问题的综合分析,依据土壤质量评价中存在模糊性特点,利用模糊数学建立土壤质量单因素评价和综合评价模型的思想与方法,对恩施州12种农业土壤质量进行综合评价,结果表明模糊数学方法在土壤质量综合评价中是一种较为理想的方法,评价结果基本符合土壤实际.     

建筑工程质量的多目标量化评价方法

依据建筑工程质量综合评价指标体系,利用层次分析法、最小二乘法和属性数学等方法,建立了综合评价模型,对建筑工程质量进行多目标综合量化评价.最后用实例验证了模型和方法的可行性.     

基于可拓学理论的日光温室设计质量综合评价

建立了日光温室设计质量多级综合评价参考体系,从实用性、经济性、创新性和美观性4个方面评价日光温室的设计质量.给出了基于可拓学理论的多级综合评价物元模型,提出了一种定性与定量相结合的日光温室设计质量多级综合评价方法,该方法通过关联函数、合格度和优度计算,客观地给出了综合评价结果.实例结果表明,该方法能够有效地保证综合评价的质量和效率.     

基于层次分析法的高校实验室综合评价

为了避免层次分析法中人的主观判断、偏好等对实验室评价结果的影响,提出了层次分析法与模糊综合评价相结合的高校实验室质量管理评价方法,利用层次分析法确定了实验室各评价指标的权重.建立了实验室模糊综合评价的数学模型,并通过对某高校实验室质量管理的综合模糊评价,验证了层次分析法与模糊综合评价相结合进行高校实验室质量管理模糊综合评价的合理性与可靠性.     

城市环境质量综合评价的集对分析方法

应用集对分析理论处理城市环境质量综合评价中的不确定性,建立了一种基于多元联系数的城市环境质量综合评价模型,并对宣州市环境质量进行了综合评价,结果表明,该方法客观合理,应用方便,是一种有效的城市环境质量综合评价方法.     

基于多元联系数集对分析模型的高校实验教学质量评价

文章根据实验课教学的特点,分析、确定了实验课程的课堂教学质量评价指标体系,建立了一种基于多元联系数集对分析的综合评价新模型.并通过实例研究了评价效果,评价结果合理可靠.为高校实验教学质量综合评价提供了一种新的方法和思路.     

基于多元联系数集对分析模型的高校实验教学质量评价

文章根据实验课教学的特点,分析、确定了实验课程的课堂教学质量评价指标体系,建立了一种基于多元联系数集对分析的综合评价新模型.并通过实例研究了评价效果,评价结果合理可靠.为高校实验教学质量综合评价提供了一种新的方法和思路.     

评价教师课堂教学质量的多层次综合评判研究

依据课堂教学活动特点以及影响评价教师课堂教学质量的因素和指标等有关资料,建立多层次结构的教师课堂教学质量评价的指标体系,并利用定量的分析方法给出群组层次分析法与模糊综合评判结合的综合评价模型.使对教师课堂教学质量的评价实现结构化和程序化.     

高校实验教学质量的模糊综合评价

为了探索一种科学有效的实验教学质量评价方法,对影响实验教学质量的各种因素进行了深入细致的调查分析.通过选择评价指标,运用模糊综合评价法,建立了实验教学质量模糊综合评价模型,并以山东建筑大学物理实验中心为例,运用熵值—模糊综合评价法构建评价模型对实验教学质量进行评价,评价结果与物理实验中心的实际情况基本相符,同时,也与省级基础课实验示范中心立项时专家组的结论基本一致.     

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     

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