关于拓扑空间中一些点集的注记

本文首先给出了拓扑空间中的一个集合为闭集的充要条件,从而进一步得到拓扑空间中的一个集合的闭包和边界集必为闭集并且它的闭包是包含着这个集合的最小的闭集。其次我们知道在一般的度量空间中一个集合的导集必是闭集,但是在一般拓扑空间中此结论不一定成立,所以本文主要给出了在拓扑空间中一个集合的导集为闭集的的充分条件和充分必要条件。     

向量优化中改进集的一些拓扑性质

改进集是研究向量优化问题的一个十分重要的工具。首先证明了改进集的有关拓扑闭包和拓扑内部的一些性质。进一步,在改进集的条件下给出了拓扑向量空间中两个非空集合之和的拓扑内部与拓扑闭包的一些运算性质,并得到了它的一些等价刻画。最后给出了一些具体的例子对主要结果进行了解释。     

L—fuzzy拓扑空间中的连通性

本文讨论了一般的 L—fuzzy 拓扑空间的连通性问题,证明了这种连通性具有与分明拓扑空间的连通性基本相同的性质.例如,介于连通集及其闭包之间的集连通,连通集在连续序同态下的像连通,满层的连通空间的乘积连通,著名的樊畿定理成立等.进而,文中讨论了可拓扑生成的 fuzzy 拓扑空间与生成它的分明空间连通性的关系.最后,证明了 Fuzzy 单位区间是连通的.     

向量优化中改进集的一些拓扑性质

改进集是研究向量优化问题的一个十分重要的工具。首先证明了改进集的有关拓扑闭包和拓扑内部的一些性质。进一步,在改进集的条件下给出了拓扑向量空间中两个非空集合之和的拓扑内部与拓扑闭包的一些运算性质,并得到了它的一些等价刻画。最后给出了一些具体的例子对主要结果进行了解释。
     

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.     

正则剩余格的⊙理想拓扑空间

运用拓扑学的方法和原理研究正则剩余格的⊙理想概念.首先,在正则剩余格L上以全体⊙理想之集为基建立了一个拓扑空间(L,TL).给出了拓扑空间(L,TL)中集合A的导集、闭包和内部的计算公式.其次,考察了(L,TL)的若干拓扑性质.最后,研究了乘积正则剩余格的积拓扑.     

覆盖模糊粗糙集近似算子的拓扑性质

通过闭包与内部算子研究覆盖模糊粗糙集的拓扑结构,证明了覆盖近似空间中模糊粗糙集的上、下近似算子分别为一个模糊拓扑的闭包、内部算子;反之,满足一定条件的模糊拓扑的闭包与内部算子也恰为一覆盖近似空间中模糊粗糙集的上、下近似算子．     

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.     

多值状态属性系统与闭包空间

本文把状态属性系统的概念推广到了多值情形,探讨了状态属性系统与闭包空间之间的关系;证明了对一个有单位元的quantale L,在L中取值的状态属性系统的范畴与在L中取值的闭包空间范畴等价.     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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