基于区间数距离和ICOWA算子的变权区间组合预测模型

针对预测值为区间数形式,将区间数距离和诱导连续有序加权平均算子ICOWA结合,以ICOWA算子下实际预测序列与组合预测序列的距离最小为准则,构建了变权组合预测模型,并证明了模型的非劣性.最后,通过实例说明了模型能够有效提高预测精度.     

基于IOWHA算子的区间预测模型及应用

针对实际值序列和预测值序列均为区间数的组合预测问题,把区间数的左右端点作为两个独立的时序数列,通过引入诱导有序加权调和平均(IOWHA)算子,分别建立以区间数左右端点的倒数离差相关系数最大化为准则的IOWHA算子的变权系数最优组合预测模型,再通过引入偏好系数把多目标最优化模型转化为单目标最优化模型,并尝试给出各模型最优解的性质.最后利用数据进行分析,并和其他单项预测方法或组合预测方法相比较,从而证明该方法确实能够提高区间预测的精度.     

向量夹角余弦的IOWHA算子的变权系数区间型组合预测模型

客观世界中人们会用区间数来描述不确定和不完备的信息,由此开展区间型的组合预测方法的研究很有意义.将区间数的左、右端点分别视作时间序列,以向量夹角余弦为准则,结合IOWHA信息集结算子,借鉴实数型组合预测的思想,将实际值区间数和变权系数组合预测值区间数的左、右端点序列分别建立最优组合预测模型,最后引入偏好系数转换成单目标最优组合预测模型而实现求解.     

广义区间灰数关联度模型

针对传统灰色关联度模型只能适用于实数序列而不能应用于区间灰数序列的情况,以区间灰数序列中对应区间灰数的距离之和作为两区间灰数序列的关联度,构造了广义区间灰数关联度模型,包括适用于具有相同量纲的系统行为序列的区间灰数绝对关联度、适用于具有不同量纲的系统行为序列的区间灰数相对关联度,以及综合考虑区间灰数绝对关联度和区间灰数相对关联度的区间灰数综合关联度,并对它们的性质进行了初步研究.最后,通过实例说明了广义区间灰数关联度模型的计算过程与可行性.     

一种具有区间数信息的应急设施选址问题

以往的应急系统选址模型都是在满足应急时间紧迫性的前提下,使得最优的设施选址到各个应急节点的赋权距离之和最小,在这些模型中,其节点的权系数都是确定的实数,但是在一些实际问题中,例如火灾,车祸等,发生事故的频率适合用区间数来表示,研究节点的权系数为区间数的应急选址模型更有实际意义,针对具有区间数信息的应急系统选址问题,给出了一种具体的求解方法,通过定义的区间数算子,将区间数与实数对应起来,将权重为区间数的应急选址模型转化为一个具有确定权系数的单目标优化模型来求解,给出了具体的算法和复杂性分析,最后通过一个实例分析说明了给出方法的可行性和有效性,方法丰富了已有的求解方法,具有实际应用价值。     

论相关系数的区间型组合预测模型

通过区间数域上的组合预测对待预测模型进行定量预测,文中的组合预测是在以相关系数作为评价组合预测方法的标准,在文中给出区间数域上组合预测的解决模型,结合实际的经济学问题,给出相应的结果并说明该模型的有效性和优势性.     

一类日极端温度的变权系数区间型组合预测模型

为提高日极端温度的预测精确度,提出了一类基于区间数相关度与GIOWHA算子新型区间数组合预测模型。将区间数转化为等价信息的中心和半径,以相关度作为最优准则,构建基于区间数相关度的定权系数区间型组合预测模型。并引入GIOWHA算子,将区间数预测精度作为诱导因子,构建基于区间数相关度与GIOWHA算子的变权系数区间型组合预测模型。并将变权系数区间型组合预测模型应用于日极端温度区间数序列的预测中,实例证明该模型的有效性,并对模型的参数进行了灵敏度分析。     

广义区间灰数关联度模型

针对传统灰色关联度模型只能适用于实数序列而不能应用于区间灰数序列的情况,以区间灰数序列中对应区间灰数的距离之和作为两区间灰数序列的关联度,构造了广义区间灰数关联度模型,包括适用于具有相同量纲的系统行为序列的区间灰数绝对关联度、适用于具有不同量纲的系统行为序列的区间灰数相对关联度,以及综合考虑区间灰数绝对关联度和区间灰数相对关联度的区间灰数综合关联度,并对它们的性质进行了初步研究．最后,通过实例说明了广义区间灰数关联度模型的计算过程与可行性．     

基于核和认知程度的区间灰数Verhulst预测模型

针对传统的Verhulst模型只能用于对实数序列进行建模预测的问题,将其建模对象扩大到区间灰数序列,构建基于核和认知程度的区间灰数Verhulst预测模型.首先,将区间灰数序列转化为核序列和认知程度序列,实现区间灰数的白化;然后,分别构建核序列和认知程度序列Verhulst模型,并反推区间灰数上下界的表达式;最后,将模型应用于某高层住宅沉降量预测并与其他模型结果对比,实例表明,所建模型的精度较高,具有实用性.     

基于向量投影测度的区间型组合预测模型

区间型组合预测模型的研究核心是确定各单项预测方法的权重。鉴于向量投影是一个综合性测度,既能反映两个向量指标对象之间距离,又能反映他们之间的夹角,本研究提出了一种新的向量标准化投影测度公式。在向量标准化投影测公式的基础上,定义了区间数向量标准化投影测度的概念,用以描述两个区间数向量的接近程度,以组合预测区间数序列和实际区间数序列的标准化投影测度为最优化准则,构建了两个基于投影测度的全新区间型组合预测模型。并通过两个实例进行了分析：（1）与已有文献的组合预测方法的结果作对比研究,验证了本法所构建的组合预测模型的有效性;（2）对我国2010-2022风力发电量序列进行拟合和预测建模,结果表明本法构建的组合预测模型有更好的拟合和预测效果,具有一定的可行性和实用性。     

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

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