双边伪欧氏环及其上的矩阵标准形

定义了双边伪欧氏环,并讨论了双边伪欧氏环上的矩阵的一些基本性质.建立了双边伪欧氏环上的矩阵标准形理论.证明了双边伪欧氏环上的n阶方阵环仍是双边伪欧氏环.     

唯一分解的伪欧氏环的结构

本文定义了唯一分解的伪欧氏环 R.设 K0 由 0和 R中所有可逆元素组成 ,xα≠ 0满足 δ(xα) =ωα,本文证明 K0 是体 ,R中任一元素可唯一表示为形如axn1 a1 … xnmαm,(a∈ K0 ,0≤ a1 <… 相似文献   

欧氏空间的等角变换

通过给出欧氏空间上的一种不改变向量夹角的线性变换-等角变换的定义，由此导出一些有趣的结论。丰富了欧氏空间上的线性变换的理论，并有一定的应用意义。     

对称内积空间的等角基与正惯性指数

文[1]给出欧氏空间的等角构形的概念，文[2]把文[1]推广到实一复欧氏空间，并给出了等角基的定义，本文作者探讨了实对称内各空间等角基的存在与对称矩阵的正惯性指数及秩的关系，丰富了等角基的理论内容。     

欧氏空间与辛空间关于伪辛空间的内蕴和扩张

论述欧氏空间、辛空间、伪辛空间的本质属性及演变过程，阐述概念的产生、扩充和分化，说明对称度量与反对称度量的内在联系和区别，对伪辛空间进行分解，同时给出分解的方法，揭示伪辛空间向辛空间与欧氏空间的延伸，得出伪辛空间包蕴辛空间与欧氏空间的结论，并指出其发展前景。     

欧氏环中多个元素的最小公倍子

给出了在欧氏环中求多个元素的最小公倍子的一个矩阵方法，该方法可用来计算整数环Z中的最小公倍子和多项式环P[x]中的最小公倍式。     

伪辛空间的分解

论述欧氏空间、辛空间、伪辛空间的本质属性及演变过程，阐述概念的产生、扩充和分化，说明对称度量与反对称度量的内在联系和区别，对伪辛空间进行分解，同时给出分解的方法，揭示伪辛空间向辛空间与欧氏的延伸，得出伪辛空间包蕴辛空间与欧氏空间的结论，并指出其发展前景。     

伪标准正交基的一种求法

利用双线性函数给出了伪标准正交基和伪单位矩阵的概念,讨论了伪单位矩阵的性质,在欧氏空间Schmidt正交化方法的基础上,得到了一种在伪欧氏空间中求伪标准正交基的方法.     

伪辛空间的分化与扩张

论述了伪辛空间概念的形成,深入阐述了其本质属性及分化、演变和扩张,揭示了伪辛空间与辛空间及欧氏空间的内在联系和区别.通过对伪辛空间的分析解剖,得出伪辛空间是辛空间保度量的扩张,也是欧氏空间的扩张,而辛空间与欧氏空间是伪辛空间的内蕴空间的结论.     

欧氏空间的等角变换的一些性质

从理论方面进一步探讨等角变换，从而提出一些性质及结论，作为“欧氏空间的等角变换”一文的继续和补充，更进一步充实欧氏空间的线性变换的理论。     

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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