一类具有π—正则结构的环

引进了单边π－正则环，证明了：如果Ｒ为单边π－正则环，ｅ＝ｅ＾２∈Ｒ，则ｅＲｅ为单边π－正则环，并给出了正则单边π－正则环的结构特征。     

椭圆型方程关于时间参数正则性估计

有关解在时间t方向上的正则性是在解决发展方程组耦合问题过程中一直关注的目标。由于在解决一些如椭圆－抛物型方程组耦合问题、椭圆－双曲型方程组耦合问题等，都会碰到椭圆型方程中关于时间t正则性的估计，为此这里针对椭圆型方程关于时间参数t的正则性进行分类讨论，旨在让同行的工作者更方便地应用有关这些正则性的结果。     

统计分布函数的统一推导

从巨正则分布及其热力学函数出发，导出正则分布，微正则分布，Ｍ－Ｂ分布，Ｂ－Ｅ分布，Ｆ－Ｄ分布及相应的热力学函数。     

加法可逆半环的f—正则根

该文在加法可逆半环中建立ｆ－正则根的概念，证明了ｆ－正则法环和ｆ－正则半单半环的结构定理，作为其应用，证明了交换ＶｏｎＮｅｕｍａｎｎ正则和交换ＶｏｎＮｅｕｍａｎｎ正则半单环的结构定理，并且得到交换环的Ｊａｃｏｂｓｏｎ根和半单环的新刻划。     

本原正则半群的0—直并分解

本文给出了本原纯正半群，本原Ｐ－正则半群，本原＊－正则半群的０－直并分解。     

本原正则半群的0－直并分解

本文给出了本原纯正半群，本原Ｐ－正则半群，本原＊－正则半群的０－直并分解。     

布尔矩阵空间及正则布尔矩阵的g－逆线性空间

研究了布尔矩阵空间和正则布尔矩阵的ｇ－逆线性空间的一些性质。在此基础上，给出了正则布尔矩阵的ｇ－逆集的另一个表示法。进而，提出了正则布尔矩阵的特征矩阵概念，通过特征矩阵可以表征一个正则布尔矩阵的极小ｇ－逆集、主ｇ－逆和ｇ－逆线性空间的一些重要性质。     

关于正则图的道路双覆盖猜想

［１］汇集了１９９０年国际图论会议（丹麦）上所提出的２７个新的未解决的问题，其中第一个就是关于正则图的道路双覆盖猜想，Ａｄｒｉａｎ Ｂｏｎｄｙ等人利用Ｐｅｔｅｒｓｅｎ定理已证明：对于３－正则图猜想为真。本文证明了对于任意的ｍ－正则的完全图，猜想是成立的。     

弱θ—加细空间的闭逆象

讨论了弱θ－加细空间的闭逆象，证明了，完备映射逆保持弱θ－加细性；当定义域空间为正则空间时，闭Ｌｉｎｄｅｌｏｆ映射逆保持弱θ－加细性，并给出反例说明，此外正则性不可省略，这个例还同时否定了回答周友成在［３］提出的一个问题。     

正则F－可测空间上的正交F－测度

提出了正则Ｆ－可测空间上正交Ｆ－测度的概念，研究了其结构特征问题；同时，还讨论了正交Ｆ－测度的正态族及其弱收敛问题．     

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.     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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