M3（R）中的极大R—子代数

李立斌等人证明了随机矩阵全体构成M3(R)的一个极大R—子代数，因此研究M3(R)中的极大R—子代数就变得非常重要了。在此背景下，构造出M3(R)中的所有极大R—子代数。     

M3(R)中的极大R-子代数

李立斌等人证明了随机矩阵全体构成M3(R)的一个极大R-子代数,因此研究Mn(R)中的极大R-子代数就变得非常重要了.在此背景下,构造出M3(R)中的所有极大R-子代数.     

交换环上辛李代数的一类子代数的导子

设m是一个正整数,R是一个带有单位元的交换环,2在R中可逆,N是辛李代数sp(m,R)的标准极大幂零子代数.确定了李代数N的导子.     

可换环上严格上三角矩阵代数的若当导子

令R是含有单位元1且2为其可逆元的可换环,M(n,R)表示R上所有n×n阶矩阵形成的代数,N(n,R)表示R上所有严格上三角矩阵所形成的M(n,R)的子代数.本文具体刻画了N(n,R)上的任一若当导子,即N(n,R)的每一个若当导子均可被唯一地分解为内导子、对角导子和中心导子之和.     

局部环上特殊正交群的一类极大子群

设R是局部环,M是唯一的极大理想,R表其剩余类域,且charR≠ 2,SO(2m,R)表示R上的特殊正交群,G(2m,M) =ABCD∈SO(2m,R) |B∈Mm×m ,本文在m≥ 3的情形下,证明了G(2m,M)是SO(2m,R)的一个极大子群.     

理想化的互极大图

设R是有1的交换环,M是R-模,R(+)M是环R对于R-模M的理想化.讨论了理想化R(+)M的理想、极大理想和可逆元与环R的理想、极大理想和可逆元之间的联系,并利用理想化的代数性质,讨论了R(+)M的互极大图的子图Γ2(R(+)M)-J(R(+)M)的直径和围长.     

A型扩张仿射李代数的极大子代数

设S是欧式空间R~n上的最小半格,由Jordan代数J(S)通过TKK构造可得到一个称之为TKK代数的李代数T(J(S)).进一步,可由TKK李代数T(J(S))得到一个A_1型、零度为v,且带有扩张仿射根系R(A_1,S)的扩张仿射李代数T.研究了扩张仿射李代数T的极大子代数,并得到了它的四类极大子代数.     

局部环上辛群中一类子群的扩群

定出了局部环上辛群中一类子群的扩群,得到了如下结果:设R是局部环,M是R的唯一极大理想,Sp(2m,R)为R上辛群。对R的任意理想S,G(S)表示子群{ABCD∈Sp(2m,R)|B∈Sm×m},如果G(0)≤X≤G(M),m≥2,char(R/M)≠2,那么存在R的理想S,使得X=G(S)。     

R0代数的双极值模糊子代数

把双极值模糊集和R0代数相结合,首先给出R0代数的双极值模糊子代数的概念并讨论其性质,研究双极值模糊集的截集与双极值模糊子代数的关系,得到了R0代数中两个双极值模糊子代数的交仍然是双极值模糊子代数的结论;其次,引入了R0代数同态的概念,证明了R0代数的双极值模糊子代数在同态下的像(原像)仍然是双极值模糊子代数;最后,在R0代数中引入双极值模糊子代数直积的定义,并讨论了R0代数中双极值模糊子代数直积的性质。     

D4型李代数的极大幂零子代数的自同构

假设R是特征非2的交换幺环,L是R环上的D4型典型李代数,N是李代数L的一个极大幂零子代数.如果是极大幂零子代数N的任意一个自同构,那么可以表示成=ωη hσvvgμf,其中ω,η h,σv,vg,μf分别是图自同构、对角自同构、内自同构、第二中心自同构、中心自同构.     

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