关于根内射模与根平坦模的一些性质

首先对rad(RR)是投射模这一性质作了进一步的探讨;然后引入了RQ环的定义,研究了根内射性与根平坦性的相关性质,得到了R是左RQ环的几个等价命题;最后对根正则环进行了分析,得到了根平坦模与根正则环的一些性质.     

分次Γ－环的J－根、底座和链条件

证明了Ｚ－型分次Γ－环的Ｊａｃｏｂｓｏｎ根和底座是分次理想，得到一系列有关分次Γ－环的分次Ｊ－根（分次底座）与Ｊ－根（底座）之间的关系式，并给出Γ－环的链条件的一些基本结果．     

分次Γ—环的J—根,底座和链条件

证明了Ｚ－型分次Γ－环的Ｊａｃｏｂｓｏｎ根和低座是分次理想，得到一系列有关分次Γ－环的次Ｊ－根（分次底座）与Ｊ－根（底座）之间的关系式，并给出了Γ－环的链条件的一些基本结果。     

关于极限环的一个等价定义

本文利用中性流形概念，给出了极限环的一个等价定义，并依此得出了两个利用该定义判断极限环存在的相应定理与有关实例     

关于极限环的一个等价定义

本文利用中性流形概念，给出了极限环的一个等价定义，并依此得出了两个利用该定义判据极限环丰在的相应定理与有关实例。     

极限环存在的一个判定方法

文中利用中性流形概念，给出了极限环的一个等价定义，并依次得出两个利用该定义判断极限环存在的相应定理与有关实例。     

遗传根性与强半单根性

本文主要论讨遗传根性与强半单根性,解决了SZASZ书中问题14,并给出了遗传根性是强半单根性的充要条件及环分解成根理想与半单理想的直和的n个等价条件。以下均作定A是结合环,但不必有单位元,R表示根性,R根环类也同样记为R。定义1 根性R为遗传根性,如果任意R环A的任意理想仍是R环。定义2 根性R称为强半单的,如果任一R半单环的同态象仍是R半单的     

S-系统的赋值Near-环

给出赋值Near-环,S-系统赋值与F-值位的定义,并分别对S-系统的赋值和位进行了研究,从而得出S-系统的等价赋值类和赋值Near-环之间的对应关系以及等价的位所成的类和赋值Near-环之间的对应关系。     

中心弱Armendariz环

定义了中心弱Armendariz环,并通过例子说明它是中心Armendariz环和弱Armendariz环的真推广.给出了中心弱Armendariz环的等价刻画,并讨论了它与Abelian环以及p.p.-环的关系.     

关于根投射模

本文给出了根投射模的一些等价刻划,例如,证明了一个根投射模是投射模的充要条件是它有投射覆盖;并利用根投射模得到了遗传环的一个特征性质;最后对根投射模的自同态环进行了讨论．     

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.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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-