广义模糊函数空间的收敛性质

本文研究了广义模糊函数空间闭包的收敛A_n→A与其切片收敛A _n (x _n)→A(x)的关系,有以下结果：对于任意的x∈X和任意收敛序列■,其中序列(A _n)_n∈N的极限■,存在一个极限为x的收敛序列■,使得当n→∞时,A _n (x _n)→A(x),其中■为从X到T的广义模糊函数空间在X×T超空间中的闭包.同时,举例强调“存在一个极限为x的收敛序列■的“存在”二字不能替换为“任意”.     

S-闭空间的遗传性

本文证明了 s-闭空间的半正则子空间具有遗传性,这定理推广了 T·Th-ompson 和 T·Noiri 的结果.同时还证明了 s-闭空间 X 中半正则集经过闭包,内部和取补算子可能产生的所有子集都相对是 s-闭的,也是 X 的 s-闭子空间。另外还给出相对 X s-闭子集的一些性质.     

具有σ-弱遗传闭包保持弱基的空间

文中证明了一个具有σ-弱遗传闭包保持sn-网的弱序列空间具有-σ紧有限sn-网.作为这个结论的一个应用,文中还证明了:一个弱序列k-空间X具有σ-弱遗传闭包保持弱基当且仅当X具有-σ弱遗传闭包保持sn-网.     

局部紧度量空间的闭映象

本文的主要结果是Ｔ２空间Ｘ具有σ遗传闭包保持的紧ｋ网当且仅当Ｘ具有σ遗传闭包保持的闭的ｋ网并且Ｘ的每一闭度量子空间是局部紧。作为它的应用。我们建立了局部紧度量空间的闭映旬的新特性。     

拓扑空间中Moore-Smith收敛的理想刻画

文章利用拓扑空间中的理想来刻画拓扑空间中的Moore-Smith收敛,并给出了闭包的一种描述,讨论了理想收敛与网收敛的关系,证明了用它们刻画Moore-Smith收敛是一致的.     

拓补空间中聚点问题浅议

一、聚点的收敛序列和第一可数性公理的关系。定义若X为拓扑空间,(?)A(?)X,当x∈d(A)时,A～{x}中存在序列〈x_i〉收敛于x,则称x为列可达的。列不可达的例例1 设X为不可数集,A为X中任何一不可数集,令T={～c:c为X的可数子集}∪{φ},在拓扑空间(X,T)中,若x∈d(A),则x列不可达。     

局部可分度量空间的强紧覆盖S映象

证明Hausdorff空间X是局部可分度量空间的强紧覆盖商s映射当且仅当X是序列空间,并且存在X的点可数覆盖{Xa:a∈A}使得每一X。有可数网fa满足对X的任一收敛序列S存在a∈A使fa是S的CS－网络,它部分回签了Michael-Nagami问题。     

推理闭包算子及其诱导的空间

目的 建立一般非空集合X上的结论 闭域和推理空间理论,并对它们的性质进行初步的探讨.方法 通过对命题演算系统的共同特征的研究,在公式集的幂集格上得到了一般命题演算系统共同满足的一个推理闭包算子,再借助通过拓扑闭包算子建立拓扑空间的思想提出了推理闭包空间理论.结果 探求推理闭包空间的初步性质和模糊命题演算系统的基本性质.结论 通过推理闭包空间的建立,丰富了模糊逻辑的研究方法 ,沟通了拓扑学和逻辑学之间的联系.     

半拓扑线性空间及其性质（II）

我们在文[9]引入了半拓扑线性空间的概念,并得到了半拓扑线性空间中半开集、半闭包、半内部、S邻域、局部S-基等方面的一些基本结果.本文进一步讨论了半拓扑线性空间的性质,得到了如下结果:(1)证明了半拓扑线性空间中凸集的半闭包和半内部均为凸集;半拓扑线性空间中平衡集的半闭包是,平衡集,并且当平衡集的半内部包含0点时,平衡集的半内部也是平衡集;在半拓扑线性空间中存在着由半闭的平衡集构成的0点的局部S-基. (2)证明了半拓扑线性空间中半拓扑线性有界集的子集是半拓扑线性有界的,有限个半拓扑线性有界集的并集也是半拓扑线性有界的,S-紧集是半拓扑线性有界的.(3)对具有C性质的半拓扑线性空间,证明了半拓扑线性有界集的半闭包是半拓扑线性有界的,有限个半拓扑线性有界集的和是半拓扑线性有界的.(4)对具有C性质的半拓扑线性空间,证明了α集A是S-紧集当且仅当A是完全半拓扑线性有界的S-完备集.     

半拓扑线性空间及其性质(Ⅱ)

我们在文[9]引入了半拓扑线性空间的概念,并得到了半拓扑线性空间中半开集、半闭包、半内部、S邻域、局部S-基等方面的一些基本结果.本文进一步讨论了半拓扑线性空间的性质,得到了如下结果:(1)证明了半拓扑线性空间中凸集的半闭包和半内部均为凸集;半拓扑线性空间中平衡集的半闭包是,平衡集,并且当平衡集的半内部包含0点时,平衡集的半内部也是平衡集;在半拓扑线性空间中存在着由半闭的平衡集构成的0点的局部S-基.(2)证明了半拓扑线性空间中半拓扑线性有界集的子集是半拓扑线性有界的,有限个半拓扑线性有界集的并集也是半拓扑线性有界的,S-紧集是半拓扑线性有界的.(3)对具有C性质的半拓扑线性空间,证明了半拓扑线性有界集的半闭包是半拓扑线性有界的,有限个半拓扑线性有界集的和是半拓扑线性有界的.(4)对具有C性质的半拓扑线性空间,证明了α集A是S-紧集当且仅当A是完全半拓扑线性有界的S-完备集.     

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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