Locale的紧正则极不连通反射

本文从任一给定LocaleA,构造出一个紧正则极不连通Locale J(A),且证明了:(1)A是J(A)的稠子locale当且仅当A是正则极不连通(2)对是范畴Loc到子范畴KREDLOC的函子(3)J是子范畴KREDLOC到范畴EDLOC的包含函子的左伴随函子,(即KREDLOC是范畴EDLOC的可反射子范畴。     

复形范畴函子(_RY,hom_s(Y,-))的同伦伴随性

主要讨论了复形范畴的张量积函子与hom函子的同伦伴随性,并且给出了同伦正则正向极限的定义,证明了复形范畴的张量积函子保持这种极限.     

关于伴随函子的等价定义

伴随是范畴论中最重要的概念之一．其定义涉及多个量且难以理解。介绍了伴随函子的几个等价定义,证明了各个定义的相互等价性．从而可以更加直观地理解伴随函子的定义．并给出了伴随函子的应用例子。     

复形范畴函子((○)RY,homs(Y,-))的同伦伴随性

主要讨论了复形范畴的张量积函子与hom函子的同伦伴随性,并且给出了同伦正则正向极限的定义,证明了复形范畴的张量积函子保持这种极限.     

函子范畴与范畴的平凡扩张

设C为小范畴,D为预加法范畴,根据范畴D上自加法函子F,定义函子范畴F上自加法函子f,并给出一族范畴同构(D∝F)C≌D∝F     

复形范畴函子（×RY，homs（Y，-））的同伦伴随性

主要讨论了复形范畴的张量积函子与horn函子的同伦伴随性，并且给出了同伦正则正向极限的定义，证明了复形范畴的张量积函子保持这种极限．     

E-quantale范畴

引入了E-quantale的定义及其一些相关概念, 讨论了E-quantale的一些重要性质。 证明了Quantale的幂集和E-quantale的乘积均可构成E-quantale, 给出了Quantale的一种自然扩张,由E-quantale可以扩张成一个Quantale。 在Quantale子范畴和E-quantale范畴之间定义了一个嵌入函子K, 并在函子K与遗忘函子U之间构造了一个自然变换, 证明了在一定条件下一个E-quantale和某个单位Quantale的幂集同构。     

拉回的第六等价定义及其应用

给出拉回、集体拉回、I-拉回、广义拉回的第六等价定义,即从可表函子角度定义,并用此定义证明了函子范畴的一个有趣结果.     

余分解维数

设A是Abel范畴, X是A的子范畴。引入了A中对象的X 余分解维数, 并利用上同调函子ExtnX给出了X 余分解维数的等价刻画。     

三角范畴中的函子有限子范畴

基于函子有限子范畴的重要性,利用图追踪的方法,从mutation对出发,得到了一类函子有限子范畴,具体而言是,设T是一个三角范畴且带有Serre函子,D是T中的一个函子有限的刚性子范畴.如果(X,Y)是一个D-mutation对,则X是T中的函子有限子范畴当且仅当Y是T中的函子有限子范畴.     

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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