基于线性方程组整体消元过程的行列式知识构建

给出线性方程组整体消元求解的一种方法。基于整体消元过程,自然引入行列式定义、展开定理及克莱姆法则等行列式核心概念。通过线性方程组消元求解这一共同背景,分析行列式主要知识点的含义及其内在联系。     

八元数上行列式定义及性质

八元数是一种非交换非结合代数，如何在八元数上建立行列式理论备受关注。用两种方法定义了八元数O上行列式，得到了一些性质及八元数三阶行列式计算机算法，还得到八元数二阶线性方程组的一般解法。     

完全分配格上的两个代数问题

研究了完全分配格上的矩阵及其行列式的性质，给出了完全分配格上矩阵的行列式的Laplace展开计算式：指出了完全分配格上的矩阵及其伴随矩阵与行列式的关系，并用完全分配格上矩阵的行列式给出了以完全分配格上的元素为系数的线性方程组的Cramer法则。结果表明完全分配格上的矩阵、行列式的一些运算、性质与实数域上的矩阵、行列式相应的运算、性质是不同的。     

论行列式的对角线法则

二阶、三阶行列式有对角线法lJ!IJ。而n阶(n>3)行列式是否也有对角线展开法则,是一个人们很感兴趣的问题。本文论证了行列式对角线法则的新结果,分三部分内容:(一) 给出四阶行列式的对角线展开法则;(二) 提出、讨论第二种对角线展开法则;(三) 证明n阶行列式可以对角线展开,并且有(2n)~(n-1)!/2种方法(n≥3).     

四元数矩阵的行展开式与其行列式

在注意到由谢邦杰定义的四元数矩阵的行展开式与陈龙玄定义的四元数矩阵的行列式之间联系与差异的基础上,给出了一个新的自共轭矩阵的行列式的展开定理,由此得到四元数矩阵逆的新的显示公式及Cramer解式。     

广义行列式在线性方程组求解中的应用

将广义行列式的概念应用于线性方程组的求解中,推广了克兰姆法则,得出了非齐线性方程组通解的一种新求法.     

四元数体上的极化余子式和逆矩阵公式

在四元数体Ｑ上研究了行列式及所谓类自共轭矩阵的行列式的性质,提出了自共轭矩阵的极化余子式和极化伴随矩阵的概念,推广了域上行列式按－行（列）展开定理,得到了逆矩阵公式以及左线性方程组的Ｃｒａｍｅｒ解式。     

多项式重根存在性的线性判别及求解

运用线性方程组的理论和Cramer法则研究多项式根的问题,给出了n次实系数多项式重根的存在性判别定理,同时建立了n次实系数多项式实重根的求根公式。     

四元数体上重行列式的性质

文１研究了四元数体上重行列式在换法变换和消法变换下的不变性。本文在此基础上讨论了四元数体上矩阵的重行列式的保法变换下的性质，并且给出两个关于重行列式的不等式。     

广义四元数代数上伴随矩阵和Cramer法则的推广

设H(F;a,b)是特征≠2域F的上广义四元数代数,利用极大交换子环的矩阵表示,本文定义了H(F;a,b)上方阵的伴随矩阵,得到逆矩阵存在的充分必要条件,并且推广Cramer法则到H(F,a,b)上右线性方程组。参6。     

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