关系传递闭包计算的补充

设X是一n元集，R是X上的一个二元关系，该文给出了R中序偶链及基链长的定义，并据此找到了一个准确的k≤n使得t（R）＝i∪i=1Ri，从而简化了关系传递闭包的计算。     

利用射影平面PG（2,Fq）中的一个二次曲线研究两类与三个类…

令Ｃ是Ｈ＝ＰＧ（２，Ｆｑ）中一个二次曲线，这里ｑ是一个偶素数的方幂，取一个二次曲线作为射影平面中的一个射影我们构作两个类和三个类的结合方案并计算它的参数。     

利用有限仿射几何的m＿面构作结构方案和PBIB设计

取有限仿射几何AG（n,Fq）中的m－面（0＜m＜n）的全体作为处理集构作了多个结合类的结合方案和一些PBIB设计，并计算了其参数。     

有限奇异酉几何与PBIB设计

利用扩充酉群的可逆性，通过矩阵方法，选取有限奇异酉几何中的２维全迷向子空间作处理，构作了一个有多个结合类的对称结合方案和一些部分平衡不完全区组（ＰＢＩＢ）设计，并计算了全部参数．     

图的离心率值列的研究（英文）

设G为一个图,对任意x∈V（G）,其离心率e(x)定义为e(x)=max{d(x,u)│任意u∈（V（G）}。将G中各点的离心率的值按照（不重复）从小到大排列而得到的数列称为G的离心率值列。现设{ei}1 ≤i≤s为一个非减的整数数列。本得到了下面三个结果：（i){ei}1 ≤i≤s是图的离心率值列当且仅当{ei}1≤i≤s=[e1,es]且e1≥1,es≤2e1;（ii）定义NG（e)={x│x∈V（G）且e(x)=e},若│NG（e)│=1则e=r(G);(iii)有给定离心率值列[r,r s]的图的最小阶f[r,r s]为f[r,r s]={2r s,若0≤s≤r-2;r s 1,若s=r-1或r;这里,[s,s k]表示[r,r s]数列{r-1 i}1≤i≤s 1。     

利用有限几何中一类m维子空间构作3—结合方案与3—PBIB设计

取有限几何中包含一个给定的m-1维子空间的m维子空间的全体作为处理集，构作了具有两个结合类的3－结合方案，然后利用这个3－结合方案构作了若干个3－PBIB设计，并且计算了其参数。     

利用伪辛几何中一类2维全迷向子空间构作结合方案与PBIB设计

取特征数是2的有限域Fq上（2v＋2）维伪辛空间V2v 2（Fq）中的（2，0，1）型子空间的集合作为处理集，构作了具有两个结合类的结合方案和PBIB设计，并且计算了它们的参数。     

可分解算子的一个算子刻划

本文证明了:定理 对T∈B(X),下列三种叙述是等价的:i)T是可分解算子.ii)对σ(T)的每个开覆盖{G_i}1≤i≤n,存在X到X中的算子组{E_i}1≤i≤n,使得(?)E_i=I;E_iX(?)(?)_T(G_i),1≤i≤n;(?),1≤i≤n.iii)对σ(T)的每个开覆盖{G_i)1≤i≤n,存在满足ii)中诸条件的,且为线性算子的组{E_i}1≤i≤n.     

奇异正交几何与对称结合方案

推广并利用特征数不为２的有限域上的扩充正交群在奇异正交几何的子空间集合上的可迁性，给出了有关子空间的一个计数定理，并用２维全迷向子空间作处理构作了一个有多个结合类的对称结合方案，计算了全部参数．     

PA序列下半参数回归函数估计的强相合性

对于半参数回归模型Yni=β.tni＋g（xni）＋εni,（1≤i≤n）,在误差{εni,1≤i≤n}为平稳PA相依序列条件下,得到未知函数g（x）的权函数估计和未知参数β估计的强相合性.     

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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