稳定子框架及苦干性质

文「１」中给出了框架Ｈ关于群Ｇ的任一元素ａ的稳定子框架的概念，本文在「１」的基础上定义上框架Ｈ关于群Ｇ的稳定子框架的概念，并给出它的若干性质。     

图的正交因子分解

研究了图的正交因子分解问题．设ｋ１,…,ｋｍ是正整数,Ｇ是［０,ｋ１＋…＋ｋｍ－ｍ＋１］－图,Ｈ是Ｇ的任一有ｍ条边的子图．若｜Ｖ（Ｈ）｜≥｜Ｅ（Ｈ）｜＝ｍ,则图Ｇ有一个［０,ｋｉ］ｍ１－因子分解与Ｈ正交     

邻域并和[A,B]—覆盖图

设ａ≤ｂ是整数，Ｇ＝（Ｖ（Ｇ），Ｅ（Ｇ）是一个图。Ｇ的一个支撑子图Ｆ称为Ｇ的一个［ａ，ｂ］－因子，若对任意的υ∈Ｖ（Ｇ）有ａ≤ｄＦ（υ）≤ｂ，图Ｇ称为是［ａ，ｂ］－覆盖图，若对Ｇ的每一条边，存在Ｇ的一个［ａ，ｂ］－因子包含它。本文给出了一个图的［ａ，ｂ］－覆盖图的关于领域并的充分条件，得到了下列结果：设１≤ａ〈ｂ是整数，Ｇ是一个阶为ｎ的图，最小度δ（Ｇ）≥α且ｎ≥２（ａ＋ｂ）（ａ＋ｂ－１）１／ｂ如     

Cartan 同构的环论证明及其应用

运用Ｑｕｉｌｅｎ提出的投射维数有限的有限生成模范畴Ｈ（Ｒ），给出了Ｃａｒｔａｎ同构的一个环论的证明．同时研究了Ｈ（Ｒ［ｘ］）中的模的可扩张性，推广了Ｑｕｉｌｅｎ归纳法，并得到了Ｒ［ｘ１，ｘ２，…，ｘｎ］的Ｇｒｏｔｈｅｎｄｉｅｃｋ定理     

关于有限群的可解性

关于有限群的可解性陈华（石河子农学院基科系，石河子８３２０００）文［１］中引入了几乎正规子群的概念，借此，本文得出了有限群可解与其极大子群均几乎正规是等价的，以及有限群可解的几个充分条件等结论．本文所讨论的群均为有限群．定义设Ｍ是群Ｇ的子群，若存在Ｇ...     

仿射代数成员问题和应用

设是ｋ［Ｘ１，…，Ｘｎ］域ｋ上ｎ个不定元的多项式环，Ｉ是ｋ［Ｘ１，…，Ｘｎ］的一个理想，ｆ１，…，ｆｍ是ｋ［Ｘ１，…，Ｘｎ］中元素，给出了一个算法来判定ｋ［Ｘ１…，Ｘｎ］中任意元素ｇ是否位于ｋ［ｆ１，…ｆｍ］并且如果Ｉ和Ｊ分别为ｋ［Ｔ１，…Ｔｍ］和ｋ［Ｘ１，…，Ｘｎ］的理想Φ：ｋ［Ｔ１，…，Ｔｍ］／Ｉ→ｋ［Ｘ１，…，Ｘｎ］是ｋ－代数同态，以Ｇｒｏｂｎｅｒ基的语言给出了Φ为同构的充要条件。这些推广了已知的结果。并给出了一个立即的应用，得出了已知的用来判定仿射代数簇同构的Ｇｒｏｂｎｅｒ基准则．     

P-内射S-系的特征

本文对幺群Ｓ的任意右商滤子Ｐ，给出了Ｐ－内射Ｓ－系“理想－同余”的特征，对Ｓ的任意特殊右商滤子Ｐ，给出了Ｐ－内射Ｓ－系的方程特征，推广了文［１］、［２］和［３］中关于内射Ｓ－系的相应结果。     

群的反同态与反同构的性质

群的反同态与反同构的性质李月芬（内蒙古师范大学计算机系，呼和浩特，０１００２２）中图分类号Ｏ１５２．３文［１］在群论中引入了反同态、反同构概念，利用它们得到了一系列与群同态、同构完全相应的性质．为讨论方便，现把有关定义叙述如下：定义１一个群Ｇ到群Ｇ...     

平面强完美图猜想的又一证明

Ｂｅｒｇｅ曾提出如下猜想：“一个图Ｇ是完美的当且仅当Ｇ和它的补图Ｇ的所有导出子图都不是长度大于３的奇数的圈”［１］．已有证明［６］，这个“猜想”对平面图是成立的．本文给出“猜想”对平面图成立的又一证法．     

有限弱本质群

群Ｇ称为弱本质群，若对一切ＮＧ，Ｈ≤Ｇ，Ｈ∩Ｎ为１，Ｈ，Ｎ之一．给出了有限弱本质群的完整分类     

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     

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