特征为2上的Witt代数W(2,1)的不可约模

通过研究李代数的既约包络代数的极小左理想来研究李代数的不可约模,对于htx＜1,确定了特征p=2上的Witt代数W(2,1)的x-既约包络代数的所有极小左理想.给出了特征标为x的不可约模同构类的代表元的集合以及它们的维数.     

特征2上Witt代数W(2,(2,1))的不可约表示

文章应用广义限制李代数的概念研究Witt代数W(2,(2,1))的表示,通过确定生成极小左理想的极大向量来给出广义既约包络代数的极小左理想,从而实现基域特征2上的Witt代数W(2,(2,1))特征标高度为0的不可约模,并且给出了它们的维数。     

Cartan型李代数的不可约表示

利用广义限制李代数的概念和性质,研究Cartan型李代数L=X(m,n)(X=W,S,H)的不可约表示,给出了特征标高度h(2≤h相似文献   

Cartan型李代数W(1,1)的不可约模

利用李代数模表示的性质及诱导模给出了Cartan型李代数W(1,1)的不可约限制模只有p个同构类,同时给出了不可约限制模的具体形式.     

一类Hopf路余代数的不可约表示

设D2是二面体群,H是群代数kD2上的一个Hopf路余代数,则H是非交换非余交换的.设T是H的Hopf理想,从而形成商代数H-=H/T.文中讨论了H-上的模表示,给出了H-上1维不可约模与2维不可约模,它们是H-上的互不同构所有不可约模.     

Loop代数的有限维不可约模的导子

设G是有限维复单李代数,A=C[t±1],GA: =G CA是loop代数.设a是非零复数,M是有限维不可约G-模,则Ma: =M是不可约GA-模, 其中xf(t)在Ma上的作用为xf(t)·v=f(a)xv.首先证明,若李代数L的有限维模都完全可约,那么L的有限维模的导子都是内导子.接着利用有限维复单李代数的有限维模都完全可约这一性质,计算GA-模Ma的导子.证明了当且仅当M是G的伴随模时,Ma存在外导子,这也说明了loop代数的有限维模不是完全可约的.     

有扭仿射李代数(g)[σ]-模范畴C的分类

设g为有限维复单李代数,g[σ]为对应的有扭仿射李代数,W、U分别为g[σ]-模范畴R、E中不可约模。本文利用生成函数的方法对g[σ]-模范畴C中可积不可约模进行讨论,证明WU为中可积不可约模且C中仅有形如WU的可积不可约模,并给出了同构定理。     

极小抛物子代数上具Borel-Weil-Bott性质的权

对支配权引入在极小抛物子代数上具有Borel-Weil-Bott性质的概念.证明了:若λ在极小抛物子代数上具有Borel-Weil-Bott性质,则λ在Uq上Borel-Weil-Bott定理成立.还证明,对如此的λ,有Uq模同构H0q(λ)■H0q(-w0λ)*,且H0q(λ)是首权为λ的不可约Uq模.在chk=0的情形,本文刻画了具有Borel-Weil-Bott性质的正则支配权的特征.作为例子,对A1,A2型量子代数,给出了有足够多的非正则支配权具有Borel-Weil-Bott性质.     

模李超代数■(2)的诱导模

令g=■(2)是特征p2的代数闭域F上模李超代数,构造了诱导模Ind_g~g+V,刻画其结构.通过计算其最高权向量,证明了诱导模的不可约性.     

A型代数群的不可约模的权集

通过详细构造权为μ的非零向量，决定了特征p〉0的代数闭域上A型代数群G的不可约模的权集,证明了λ∈X1（T）是限制支配权时，不可约G-模的权集同Weyl模的权集是相同的．     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-