拓扑空间中的连通性

介绍了拓扑空间中的局部连通和道路连通,获得了以下结果:实数空间是道路连通的,欧氏平面中的单位圆周是连通的,欧氏平面中所有至少有一个坐标为有理数的点构成的集合是一个连通子集.证明了几个局部道路连通空间的定理和与拓扑空间中的连通性有关的几个定理.     

不分明化拓扑群（Ⅱ）

本文给出了不分明化拓扑群的同态、同构、直积和连通的概念,建立了它们的某些性质.     

弱ω-不连通空间

.一个拓扑空间被称为是弱ω不连通的, 如果它可以表示成可数无限个非空闭集的不交并. 在实直线上, 已知任何区间都不是弱ω不连通的. 本文证明了两条更一般的结论: (1) 任何连通, 局部连通, 局部可数紧的T2空间都不是弱ω不连通的; (2) 任何可序化的连通空间都不是弱ω不连通的     

基于拓扑系统的局部δ-连通空间研究

在拓扑系统中,借助δ-连通集给出局部δ-连通空间的定义,并证明局部δ-连通性是拓扑不变性.     

双预拓扑空间的不连通类

将拓扑空间的连通类和不连通类推广到双预拓扑空间中,并给出了双预拓扑空间不连通类的一些性质。讨论了当双预拓扑空间的一个不连通类A中含有二元集上的某些双预拓扑空间时A的结构。     

局部S-闭空间的某些性质

在已有结果的基础上进一步讨论了局部S-闭空间的性质,得到了极不连通的局部H（i）空间是局部S-闭的;局部S-闭的巳空间是极不连通和局部紧的;拓扑空间是局部S-闭的当且仅当它的半正则化是局部S-闭的．     

拓扑置成的LF拓扑空间

本又给出了由分明拓扑空间（X，T）置成的LF拓扑空间（LX，X（T）），研究了它的拓扑基结构，证明了（LX，X（T））是T2的，连通的空间，当且仅当（X，T）是T2的，连通的空间。     

局部S-闭空间的某些性质

在已有结果的基础上进一步讨论了局部S-闭空间的性质,得到了极不连通的局部H(i)空间是局部S-闭的;局部S-闭的PΣ空间是极不连通和局部紧的;拓扑空间是局部S-闭的当且仅当它的半正则化是局部S-闭的.     

Vietoris拓扑空间的道路连通性

研究Vietoris拓扑空间中的道路连通性与拓扑空间X中道路连通的关系,最终证明:(1)X为局部道路连通空间,ζ为(ρ0(X),Γy)中道路连通子集,(A)C∈ζ,C为道路连通集,则A＝∪ C∈ζC为道路连通的.(2)(X,Γ)为道路连通的,那么(ζ,Γy)为道路连通的.(3)X为局部道路连通空间,(ζ1,Γy)为道路连通的,那么X为道路连通空间.     

局部δ-连通空间的几个性质

在拓扑空间中,借助δ-连通集给出局部δ-连通空间的定义,并证明局部δ-连通性是可商性和任意可积性。     

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