广义逆A(2)T,S的奇异值分解

本文讨论广义逆A(2)T,S的奇异值分解的表示式,给出A(2)T,S与A+的奇异值的一些关系,并给出其他一些广义逆的奇异值分解的表示式.     

广义逆A(2)T,S的一种新的表示式及其应用

首先给出了A的群逆Ag的一种新的表达式，然后利用广义逆AT,S^(2)与群逆Ag的关系式，导出了广义逆AT,S^(2)的一种新的表示式。由此分别给出A的加权Moore-Penrose逆A^ M,N,Moore-Penrose逆A^ ，Drazin逆Ad及群逆Ag的新的表示式。     

广义逆A(2)T,S的几种等价表示式及其应用

给出了广义逆AT,S^（2）的一种新的表示式,推广了Zlobec公式,证明了广义逆AT,S^（2）的4种表示式子间的等价关系,并给出了它的应用．     

极限limY λ→0（λI＋AY）^-1存在的充要条件

给出了极限limY λ→0（λI＋AY）^-1存在的充要条件，并由此导出了算子广义逆AT,S^（2）的极限表示。     

广义逆A（T,S）^（2）的体积

研究了广义逆AT,S(2)的体积,在不必首先计算出广义逆AT,S(2)的前提下,导出了广义逆AT,S(2)的体积表示,推广了文献 [3]中的结果．由此分别给出了A的加权Moore-Penrose逆,Drazin逆Ad及群逆Ag的体积表示式．     

矩阵方程A^TXA=B的双对称解

运用矩阵的奇异值分解与广义逆矩阵,给出了矩阵方程A^TXA=B有双对称解的充分必要条件,并在有解的情况下,得出解的一般表示。     

除环上矩阵A的广义逆A(2)T,S的存在性

进一步刻划除环上矩阵A的广义逆AT,S^（ 2）,给出AT,S^（ 2）存在的一个充要条件,并且证明对适当的矩阵G,AR（G）,N（G）^（2）分别与群逆,Drazin逆和ρ Moore-Penrose逆一致．     

矩阵方程ATXA＝B的双对称解

运用矩阵的奇异值分解与广义逆矩阵 ,给出了矩阵方程ATXA =B有双对称解的充分必要条件 ,并在有解的情况下 ,得出了解的一般表示 .     

矩阵A-CB的斜广义逆

利用广义奇异值分解研究了修正矩阵A-CB的斜广义逆问题，其中CB是一种满秩分解。在R(C)∩R(A)={0}和R(B^*)∩R(A^*)={0}的条件下，分别给出了修正矩阵A-CB的斜广义逆的表达式。     

求解矩阵方程A1XB1+A2XTB2=E的一般解

将矩阵方程A1XB1+A2XTB2=E解表示问题转化为对子矩阵块约束下矩阵方程AYB=E对称解表示问题。应用矩阵的Kronecker积、矩阵广义逆、广义奇异值分解等理论给出矩阵方程A1XB1+A2XTB2=E解的表示。     

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     

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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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has