分配格的等价关系刻画

通过在格上定义等价关系,给出了分配格,Heyting代数,Boolean代数的一致等价刻画。由此得到了Heyting代数与Boolean代数分解定理．     

Heyting代数中同余关系的简化

给出了Heyting代数中同余关系的一种简单定义,这种定义并不改变全体滤子和全体同余关系之间的一一对应性,并且借助滤子证明了这种定义是Heyting代数作为泛代数的同余关系的简化。最后证明了全体滤子之集作为完备格同构于全体同余关系之集。     

Heyting代数的布尔原子及其应用

利用Heyting代数的布尔元得到了Heyting代数的一种直积分解表示。基于Heyting代数的这种分解,证明了有限Heyting代数可通过依次替换布尔代数中的原子为Heyting代数而得到。该结论揭示了Heyting代数与布尔代数之间的一种新的关系。     

Heyting代数与剩余格

证明了Heyting代数是特殊的剩余格,由此得到了Heyting代数的若干性质,给出了Heyting代数成为Boole代数、格蕴涵代数、MV-代数和弱R0-代数的充分必要条件。     

Heyting代数中的直觉模糊滤子

定义并讨论了Heyting代数中的直觉模糊滤子及其性质.给出了直觉模糊格滤子与直觉模糊滤子的关系,得到了直觉模糊滤子的几个等价条件.     

极大并滤子及其相关性质

在极大滤子定义基础上引入极大并滤子概念,进而给出分配格的一个新的内部刻画,并证明了其存在性定理.最后,讨论了Heyting代数中极大并滤子及其相关性质.     

可换BR_0代数的刻画和性质

为了得到基础R0代数(简称BR0代数)的更多表示和性质,利用蕴涵算子给出了可换BR0代数的两种形式更为简单的刻画;证明了可换BR0代数与有界可换BCK代数之间的等价性;证明了满足Heyting性质(HP条件)的可换BR0代数与正则Heyting型FI代数(即HFI代数)等价.     

反Heyting代数中MT理想及其性质

将MT理想的概念引入到反Heyting代数中并对其性质进行了较为深入的研究.首先,在反Heyting代数中通过反蕴涵算子提出了MT理想的概念,讨论了MT理想的等价条件和他的基本性质;其次,给出了反Heyting代数的MT理想的几种生成方法;最后,在反Heyting代数中提出了素MT理想、极大MT理想以及次极大MT理想的概念,并且讨论了这些特殊理想的性质以及相互关系.     

完备格上的张量积

本文讨论了完备格上张量积的一个有意义的性质:A、B是完备的Heyting代数,当且仅当A与B的张量积是完备的Heyting代数。     

Heyting代数的扩张模糊滤子

运用代数学与模糊集的方法和原理对Heyting代数的模糊滤子理论作进一步深入研究。引入了Heyting代数(H,≤,→)的模糊滤子f关于H上模糊子集μ的扩张模糊滤子和不变模糊滤子概念,获得了扩张模糊滤子和不变模糊滤子的若干性质。建立了扩张模糊滤子和生成模糊滤子间的关系,并利用这一关系给出了扩张模糊滤子在格结构研究中的应用,证明了一个Heyting代数(H,≤,→)的全体模糊滤子之集FFil(H)的3个特殊子集关于模糊集合包含序都构成完备Heyting代数。     

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