完全条件可换与F-群

称群G的子群H在G中完全条件可换，如果对于G的每一个子群K，都存在x∈〈H，K〉，使得HK^x=K^zH．本文利用了子群的完全可换性得到了F-群的一个判别准则．     

子群的完全c-可换性与p-可分群

设■表示P-可分群的群类。利用完全c-可换子群的概念,得到了P-可分群的两个充分条件:(1)如果群G的4阶循环子群在G中完全c-可换且G的任意极小子群含于Z_■(G)中,那么G是P-可分群;(2)设H■G且G/H是P-可分群。如果H的任意阶循环子群在中完全c-可换且H的任意极小子群包含在Z■(G)中,那么G是p-可分群。     

极小子群与有限群的p-幂零性

有限群G的子群H称为G的完全条件置换子群,如果对G的任意子群K,存在〈H,K〉的某个元素y,使得HKy=KyH.本文利用完全条件置换子群的概念研究了有限群的极小子群,得到了p-幂零群的一些充分条件.     

完全条件置换子群对有限群结构的影响

有限群G的子群H称为G的完全条件置换子群,如果对于G的任一子群K,存在x∈（H,K）,使得HK^z=K^zH文中利用完全条件置换子群对有限群结构的影响,给出了超可解群的若干充分条件,并将一些结果进行了推广．     

完全条件置换子群对有限群结构的影响

群G的子群H称为在G中完全条件置换的,如果对于G的每个子群K,都存在x∈（H,K）,使得HE^z=F^zH本文利用子群的完全条件置换性来讨论有限群的结构,得到了有限群为超可解群,P-幂零群的充分条件．     

完全条件置换子群与有限群结构

有限群G的子群H称为G的完全条件置换子群，如果对于G的任一子群K，存在〈H，K）的某个元素x，使得HK^x=K^xH．本文利用完全条件置换子群的概念研究有限群的超可解性的问题，获得了一些结果．     

完全C-置换子群

群G的一个子群H称在G中完全条件置换(或完全G置换).如果对群G的任意子群K,存在x∈,满足HKx=KxH.利用子群的完全G置换性给出了群为p-幂零群及超可解群的一些特征.     

S-拟正规子群对有限群结构的影响

设C为有限群,称G的子群H在G中S-拟正规,如果H和G的每个Sylow子群相乘可换,利用子群的S-拟正规性给出了有限群成为幂零群或超可解群的一些充分条件,并得到了有限群G的2-极大子群在G中S-拟正规时G的一个完全分类定理.     

有限群为可解群的一个充分条件

有限群G的子群H称为G的置换子群(或拟正规子群),如果H与G的任意子群K可置换(即HK=KH).设H,K和L都是群G的子群,且满足H≤K≤L,若H是K的拟正规子群,K是L的拟正规子群,必有H是L的拟正规子群,则称群G为PT-群.本文研究了群G的所有非正规极大子群M都是可解PT-群,得到群G为可解群的一个新的充分条件.     

有限群的ss-可补子群

有限群G的子群H叫做在G中ss-可补,如果存在G的子群K使得HK是G的s-置换子群且H∩KH sG ,其中H sG 是G的含于H的最大s-置换子群. 该文刻划具有 Sylow 子群的某些ss-可补子群的有限群的可解性.     

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.     

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-     

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