关于强素子模

本文定义了强素理想,强素子模及环的 m*-系和模的m*-系,且给出了它们之间的两个等价关系:(1)设L是环R的理想,那么L是R的强素左理想当且仅当C(L)=R-L是m*-系;(2)设K是左R-模M的子模,那么K是M的强素子模当且仅当C(K)=M-K是m*-系.     

Hilbert C*模上的广义g框架的扰动

主要研究了Hilbert C*-模上的广义g-框架在扰动条件下的稳定性,即一族元素与给定的广义g-框架满足什么条件时能构成广义g-框架.类似于Hilbert空间中的情形,具体给出了3类不同的扰动条件,并用算子理论的方法和技巧证明了广义g-框架在这3类扰动下的不变性结论.最后讨论了Hilbert C*-模上的广义对偶g-框架的稳定性的结果.     

Hilbert C~*-模和JB~*-Triples

研究了HilbertC*-模和JB*-tripes的关系,我们证明了:(1)C*-代数上的每个Hilbert模等距同构于算子JB*-triple;(2)交换JB*-triple必定是某一C*-代数上HilbertC*-模。     

Goldie*-补模的推广

作为Goldie*-补模的推广,本文引入了主Goldie*-补模.称模M是主Goldie*-补模(主G*-补模),如果对M的任意循环子模X,存在M的补子模Y,使得(X+Y)/?M/X且(X+Y)/Y?M/Y.研究了主G*-补模的一些性质,并证明了若M=M_1M_2,M_1=aM,M_2=bM,a,b是End(MR)的本原幂等元,且对任意N?M,N=aN+bN.则M是主G*-补模当且仅当M1和M2是主G*-补模.     

Hilbert K-模上框架的不相交性及不变量问题

考虑了紧算子代数模(Hilbert K-模)上的框架。运用泛函分析和算子代数的理论知识,给出并证明了HilbertK-模上框架(强)不相交的充要条件。最后,联系C*-子代数的指标理论,得到了Hilbert C*-子代数中关于不变量问题的两个重要结论。     

Hilbert C*-模中融合框架的新定义及其系数的最小性

观察到Hilbert C*-模中融合框架原定义的不合理性,通过权重集的选取将其改进,得到融合框架的新定义并给出了新定义的等价形式.得到了Hilbert C*-模中融合框架系数的一个最小性质,作为该性质的应用,给出了融合框架去掉某个框架元素后不再成为融合框架的条件.     

关于A-线性保正交映射的注记

在Hilbert C*-模中,运用算子论方法,得到了A-线性保正交映射的一个等价刻画,完善了已有的结论.     

Hilbert K-子模上框架的(强)可补性

引入了Hilbert K-子模上框架的框架变换和正交投影,重新定义了Hilbert K-模上的Hilbert基,(强)可补,直和的内积等概念,通过探讨框架变换和正交投影之间的关系,研究了Hilbert K-子模上框架的(强)可补性,得到了一些重要结论,并加以推广.     

Hilbert K_子模上广义框架的（强）可补性

引入Hilbert K-子模上广义框架的广义框架变换和正交投影,研究二者的关系.重新定义Hilbert K-模上的广义Hilbert基、(强)可补、直和的内积等概念,从正交投影的角度得到了Hilbert K-子模上两广义框架(强)可补的充要条件,并进行了推广.     

遗传C^＊-子代数和可补闭子模的关系

本文获得了单均个闭子模为可补闭子模的一些新的特征刻画,进而证明了HilbertC*-模E的每个闭子模B可补的充要条件为B=pK(E)p,p为投影元.     

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.     

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