关于k-Hopf代数B(k)的结构

设k是特征零的域．C(V)表示k-线性空间V的余交换余自由k-余代数，熟知C（V)有交换k-Hopf，B(V)表示它的含1不可约分量．利用尖不可约余交换余代数的性质采用直接的方法给出了当dimV=l时B(V)的结构及一般情形下B(V)的一些性质。     

拟余Noether余代数

引进了一类新的余代数即拟余Noether余代数 ,它是一类Noether代数的对偶余代数 ,并且推广了M .Y .Wang,Z .X .Wu (AlgebraColloquium ,1998,5 (1) :117～ 12 0 .)引进的conoether余代数 .重要结果是给出了这一类余代数的一系列特征性质及相关结果 :即C是右拟余Noether余代数当且仅当每个有限自由右C 余模是右拟余Noether余代数等价于每个有限余生成右C 余模是右拟余Noether余代数等价于每个有限余生成右C 余模拟有限余表示 .     

分配格L上矩阵方程AX=B的解

设L是分配略,本文给出了L上的矩阵方程AX=B即方程组金(?)之解的求法,以及该方程有解的一个充要条件。     

余模的余自同态余代数（英文）

讨论了余模的余自同态余代数的性质,给出了对偶于模的自同态环的相关结果。     

半模上同余的一些性质

引进了限制同余和扩充同余的概念,研究了半模上的同余的若干性质.     

余模的余自同态余代数

讨论了余模的余自同态余代数的性质,给出了对偶于模的自同态环的相关结果.     

具有Q- 逆断面的正则半群上的同余格

研究了具有Q-逆断面的正则半群上的同余格Con(S)上的等价关系W和Q,它们都是Con(S)上的完全同余,这些完全同余的每一个类是区间,给出了每一个类的极大、极小同余的表示.     

分次余代数的余理想

设C是分次余代数,讨论D是C的分次子余代数的充要条件是D的垂直正交补D┴是R的分次理想;D是C的分次余理想的充要条件是D的垂直正交补D┴是R的分次子代数;D是C的分次右(左) 余理想的充要条件是D的垂直正交补D┴是R的分次右(左)理想.特别地,分别取D与C的子空间De与Ce,它们也有一定的关系.     

一类不定方程的解

目的 讨论不定方程ax^2 6y^2 cz^2=x dxyz满足一定条件的整数解。方法 主要利用同余理论和初等数论中的有关结论。结果 给出了不定方程的满足所给条件的整数解。结论 推广了不定方程的研究范围，为进一步研究提供了方向。     

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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