Q[x]的一个子环的素谱及同调维数

本文确定了有理数域Q上的多项式环Q[x]的一个子环R={f(x)∈Q[x]|f(0)∈Z}的极大谱、素谱及同调维数.     

零维理想的性质

主要研究和讨论多项式环k[x1,…,xn]中零维理想的一些性质及模零维理想I的商环k[x1,…,xn]/I可分解成一些无幂零元环的直和.并讨论了当I是准素理想、零维准素理想时,I∶f与I∶〈f1,…,fr〉的性质;得到了以下重要结论:当I是P-准素理想,则I∶〈f1,…,fr〉=R或是P-准素理想.参8.     

零维理想的仿射代数簇

设K为一个域,I是多项式环K[x1,x2,…,xn]上的零维理想．研究了,的仿射代数簇V（I）中包含的点至多的个数及其等价命题,V（I）中包含的点的个数与商环K[x1,x2,…,xn]／I（V）及K[x1,x2,…,xn]／√I作为K上的向量空间时的维数之间的关系．     

有限伪反射群的二维不变式

设F是特征数为0的域,V是F上的n维向量空间,G是作用在n维向量空间V上的有限伪反射群,F[V*]G是由n个代数无关的齐次不变式f1,f2,…,fn在F上生成的多项式代数.在有限伪反射群的一般不变式理论的基础上,求出了G的二维不变式环F[2V*]G的一组基本不变式,f1(x1,x2,…,xn),f2(x1,x2,…,xn),…,fn(x1,x2,…,xn),f1(y1,y2,…,yn),f2(y1,y2,…,yn),…,fn(y1,y2,…,yn),这里F[2V*]=F[x1,x2,…,xn;y1,y2,…yn].并给出了F[2V*]G的基本不变式和有限伪反射群G之间的关系.     

环Zpα上的重根负循环码

证明了对任意的整数k满足1≤k≤m(α,pβ),存在一个负循环码C≤Zpα[x]/〈xn+1〉(n=pβl且p不整除l)可由k个多项式生成但不能由k-1个多项式生成.     

多项式环的表现维数

设R为有单位元的环,M为右R-模,通过研究多项式环上的表现维数,得到了当R,R[x]为凝聚环时,MR与MR[x]的表现维数之间的关系以及R与R[x]的表现维数之间的关系等结论。     

Test多项式及其判定

给出了判断K[x]=K[x1,x2,…,xn]中的多项式为test多项式的若干方法，并给出了一类test多项式．     

不定方程x2+my2=z2在多项式环中的正本原解

利用不定方程本原解的概念,多项式环的有关性质,研究了不定方程x2 my2=z2在多项式环R[x]中的本原解,得到了在多项式环R[x]中,任意首项系数为正数的多项式f(x),必有R[x]中首项系数为正数的多项式g(x),h(x),使得f(x)=g(x)2 m·h(x)2,其中m为正整数.     

环Z_（pα）上的重根负循环码

证明了对任意的整数k满足1≤k≤m（α,pβ）,存在一个负循环码C≤Zpα[x]/〈xn＋1〉（n=pβl且p不整除l）可由k个多项式生成但不能由k-1个多项式生成.     

关于环交换性的两个定理

为了促进交换性的发展,根据半质环及半单环的相关资料,扩展了文献[1-2]的结论,得出了环的两个交换性定理：定理1：设R为一个半质环,若对(v)x1,x2,…,xn∈R,有依赖于x1,x2的整系数多项式P(t)使得[…[[x1-x21p(x1),x2],x3],…,xn]∈Z(R),则R为交换环。定理2：设R为一个kot...     

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