Cohen—Macaulay环的推广

推广了Ｃｏｈｅｎ－Ｍａｃｕｌａｙ环的概念，即对任何非负整数ｋ，考虑所谓的ｋ－Ｃｏｈｅｎ－Ｍａｃａｕｌａｙ环，并证明它的一些性质，比如纯粹性定理的推广，作为ｋ＝０的情形，得到通常的Ｃｏｈｅ－Ｍａｃａｕｌａｙ环的一些重要定理。     

几种Co—Cohen—MacaulayArtin—模的性质

本文通过对长度和重度度的研究，得到：在Ｇ（Ｉ，Ｍ）为Ｃｏ－Ｃｏｈｅｎ－Ｍａｃａｕｌａｙ模的情况下的几个性质及在Ｍ为Ｃｏ－Ｃｏｈｅｎ－Ｍａｃａｕｌａｙ模的情况下的一个定理。     

逼近Cohen－Macaulay模

逼近Ｃｏｈｅｎ－Ｍａｃａｕｌａｙ模晏能中（达县师专）在交换代数中，Ｃｏｈｅｎ－Ｍａｃａｕｌａｙ模已有广泛的研究，在几何上，它是一种较好的奇异条件，它在代数几何里也是一种很好的条件，我们考虑了比ＣＭ－性更弱的条件，称为逼近ＣＭ－性．定义设Ｒ是一个Ｎｏｅ...     

模的内部弱消去

本文证明发如下定理：对于任意右Ｒ－模Ｍ，Ｍ内部弱消云的充分必要条件为；环ＥｎｄＲ（Ｍ）中的任意正则元都是单侧幺正则的。这一结果推广了１９７６年Ｇ．Ｅｈｒｌｉｃｈ「２」中的一个 要定理，并推广了１９８２年Ｒ；Ｇｕｒａｌｎｉｃｋ与Ｃ．Ｌａｎｓｋｉ的一个结果。     

相容映射和公共不动点

本文用相容映射的概念证明了一些不动点定理．这些定理改进和推广了Ｊｕｎｃｋ，Ｆｉｓｈｅｒ－Ｓｅｓｓａ，Ｋａｎｇ－Ｊｕｎｇｃｋ等学者的相应结果．     

Ba空间中三角多项式逼近的Jackson定理

研究了把Ｂａ空间中的函数用代数多项式逼近的问题．把逼近论中经典的Ｊａｃｋｓｏｎ定理推广到Ｂａ空间的基础上，在以２π为周期的函数构成的Ｂａ空间中，证明了用三角多项式逼近的Ｊａｃｋｓｏｎ型定理．     

Mobius交错偏序集

本文研究了Ｍｏｂｉｕｓ交错偏序集，给出该类偏序集的纤维构造定理，并讨论其在积和区间运算下的保持情况．本文将Ｂａｃｌａｗｓｋｉ有关ＣＭ偏序集的一些性质推广到Ｍｏｂｉｕｓ交错偏序集上．     

Kac—Moody群的无限维代数子群

Ｓ．Ｐ．Ｗａｎｇ在文献中已经提出了Ｋａｃ－Ｍｏｏｄｙ群的有限维代数子群的概念。笔者首先把Ｃｈｅｖａｌｌｅｙ闭子群定理推广到Ｋａｃ－Ｍｏｏｄｙ群的有限维代数子群,即定理１．３。其次,通过子群和子代数之间的对应建立了Ｋａｃ－Ｍｏｏｄｙ群的无限维代数子群,并且证明无限维代数子群的说法是有限维代数子群的推广。     

非惯性系中的高阶非完整系统的Mac─Millan方程

非惯性系中的高阶非完整系统的Ｍａｃ─Ｍｉｌｌａｎ方程邱荣（福州大学电子科学与应用物理系，福州，３５０００２）１９３６年Ｍａｃ－Ｍｉｌｌａｎ推广了Ｌａｇｒａｎｇｅ方程，他一开始便考虑了一阶线性非完整约束系统，１９８４年梅凤翔又将Ｍａｃ－Ｍｉｌｌａｎ方程...     

动物体液中的胞外钙调素结合蛋白（快报）

利用以生物素标记钙调素为探针的凝胶覆盖技术检测动物体液中胞外钙调素结合蛋白（ＣａＭＢＰ）。结果，人的唾液中检测到至少３种分子量分别为１４ｋＤ，２４ｋＤ和５２ｋＤ的ＣａＭＢＰｓ。其中，５２ｋＤ蛋白与ＣａＭ的结合依赖于Ｃａ２＋的存在，而２４ｋＤ和１４ｋＤ蛋白则不依赖于Ｃａ２＋。在鸡血清里，检测到以９４ｋＤ，４４／４５ｋＤ蛋白为主的４～５种胞外ＣａＭＢＰｓ，所有的这些蛋白与ＣａＭ的结合都依赖于Ｃａ２－。此外，在牛奶中也检出胞外ＣａＭＢＰｓ。以上结果，证明了在动物中普遍存在胞外ＣａＭＢＰｓ，为胞外钙调素的作用机理提供了新线索。     

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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