关于环上矩阵的广义逆（Ⅱ）

本文给出了环上矩阵（１，５）－逆的一个新的计算公式，并利用群逆刻划了约化环、强正则环及除环，最后讨论了矩阵幂的ＭＰ－逆和群逆之间的联系。     

环上矩阵的Drazin逆

本文中，我们利用π－正则环的理论，使用具有一般性的方法，对环上矩阵的Ｄｒａｚｉｎ逆进行了讨论，得到了环上一切矩阵的Ｄｒａｘｉｎ逆存在的若干充分必要条件。     

环逆代数—一般环的等效系统

推广了广义结合ＢＥＩ－代数系统，引入环逆代数的概念，该类代数与一般环中加法的“逆”有密切关系，故称之为环逆代数。本文主要证明了环逆代数与一般环间的一一对应关系，从而说明环逆代数是一般环的等效系统。     

环上加边矩阵M的g—逆

给出了非交换主理想整环上矩阵Ｍ＝（Ａ,Ｂ,Ｃ ０）的ｇ－逆的一般式,及Ｍ的ｇ－逆中各子块相互独立的充要条件,讨论了Ｍ的ｇ－逆的两种特殊形式。     

环上矩阵的Drazin逆

设Ｒ是一交换环,Ａ∈Ｍｎ（Ｒ）,定义Ａ的指数和Ｄｒａｚｉｎ逆Ａ＾Ｄ,假设Ａｋ＝ＰＢＱ,ｋ＝ｉｎｄ（Ａ）,其中Ｐ,Ｂ,Ｑ∈Ｍｎ（Ｒ）,存在Ｐ’,Ｑ’∈Ｍｎ（Ｒ）,使得Ｐ‘ＰＢ＝Ｂ＝ＢＱＱ’若Ｂ有群逆,则Ａ有Ｄｒａｚｉｎ逆当且仅当ＢＢ＾＃ＱＡＰＢ＋Ｉ－ＢＢ＾＃可能,此时有Ａ＾Ｄ＝ＰＢ（ＢＢ＾＃ＱＡＰＢ＋Ｉ－ＢＢ＾＃）＾－１Ｑ。     

布尔矩阵的极小g—逆和g—逆集的一个表示法

提出了布尔矩阵的极小ｇ－逆（广义逆）的概念，给出了求正则布尔矩阵的极小ｇ－逆集的一个算汉和极小ｇ－逆个数的计算公式。根据ｇ－逆界定理，一个正则布尔矩阵Ａ的全部ｇ－逆可以通过Ａ的极小ｇ－逆集和最大ｇ－逆表示出来。     

布尔矩阵的极小合g－逆和g－逆集的一个表示法

提出了布尔矩阵的极小ｇ－逆（广义逆）的概念，给出了求正则布尔矩阵的极小ｇ－逆集的一个算法和极小ｇ－逆个数的计算公式。根据ｇ－逆界定理，一个正则布尔矩阵Ａ的全部ｇ－逆可以通过Ａ的极小ｇ－逆集和最大ｇ－逆表示出来。     

关于态射和的广义逆

给出了态射和的（1，2，i）－逆与群逆存在的条件及它们的显式，推广了Huylebrouck关于态射和MP－逆与群逆的结论。     

布尔矩阵g-逆的求法

本文给出了布尔矩阵的最大ｇ－逆的构造性算法,极小ｇ－逆的简易算法及其人证明,从而可以简捷算出布尔矩阵的全部ｇ－逆。     

关于环上矩阵乘积的广义逆

研究环上矩阵乘积的广义逆 ,得到了其广义逆存在的充要条件 ,给出了相应广义逆的表达式 ,推广了文献 [1 ]的有关结果。     

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