经典Ramsey数R(7,21)的下界

通过计算机构造了一个新的６４１阶循环图,它既不含任何的７点团,也不含任何的２１独立点集,从而获得了Ｒａｍｓｅｙ数Ｒ（７,２１）的一个下界：Ｒ（７,２１）≥６４２．这个结果填补了Ｒａｍｓｅｙ数研究的一个空白．     

不含K3的极大循环图和K（c）函数

本文介绍了不含Ｋ３的极大循环图和Ｋ（Ｃ）函数的概念，讨论了一类与有限整数区间上的Ｓｕｍ－ｆｒｅｅ基相关的不含Ｋ３的极大循环圈（简称ＭＴＣ图），研究了Ｋ（ｃ）函数的某些重要结果，在此基础上获得了某些较好的Ｒａｍｓｅｙ数Ｒ（３，ｈ），ｈ≥６１，的下界．     

关于Lebesgue可则性的映射不变性

讨论了在映射Ｔ：Ｒ＾ｎ→Ｒ＾ｍ下，点集Ｔ（Ａ）包含Ｒ＾ｍ与Ｔ＾－１（Ｂ）包含Ｒ＾ｎ的可测性，研究了映射Ｔ的保零测性与保可测性的条件。     

无线广播网络的可靠性的一个算法

提出了一个无线广播网络（Ｒａｄｉｏ－ＢｒｏａｃｄｃａｓｔＮｅｔｗｏｒｋ，ＲＢＮ）的概率有向图模型，利用该模型，证明了计算ＲＢＮ的２终点可靠性是个ＮＰ－困难问题，进而提出几个保何靠性约化（Ｒｅｌｉａｂｉｌｉｔｙ－ＰｒｅｓｅｒｖｉｎｇＲｅｄｕｃｔｉｏｎ）和一个计算ＲＢＮ的２－终点可靠性的因子算法。     

广义Abel平均在Triebel—Lizorkin空间上的收敛性

Ｆ＾ａｑ,ｐ（Ｒ＾ｎ）表示Ｒ＾ｎ上的Ｔｒｉｅｂｅｌ－Ｌｉｚｏｒｋｉｎ空间,建立了极大广义Ａｂｅｌ平均的强（Ｆ＾０．２ｐ,Ｌ＾ｐ）型不等式,得到了任意正阶的广义Ａｂｅｌ平均在Ｆ＾０．２ｐ（Ｒ＾ｎ）上的点态收敛结果。     

环R上σ─有限测度的内测度扩张的新方法

由环Ｒ上的σ－有限测度μ，引出了一个定义在可传σ－环Ｈ（Ｒ）上的一个集函数μ，证明了它与ＰａｕｌＲ．Ｈａｌｍｏｓ由σ－环Ｓ（Ｒ）上的σ－有限测度μ（μ｜Ｒ＝μ）所引出的定义在Ｈ（Ｓ（Ｒ））＝Ｈ（Ｒ）上的内测度μ是一致的，由此指出了环Ｒ上σ－有限测度的扩张的另一条途径．     

环R上σ-有限测度的内测度扩张的新方法

由环Ｒ上的σ－有限测度μ，引出了一个定义在可传σ－环Ｈ（Ｒ）上的一个集函数μ证明了它与ＰａｕｌＲ．Ｈａｌｍｏｓ由σ－环Ｓ（Ｒ）上的σ－有限测试μ（μ｜Ｒ＝μ）所引出的定义在Ｈ（Ｓ（Ｒ））＝Ｈ（Ｒ）上的内测度μ，是一致的，由此指出了环Ｒ上σ－有限测度的扩张的另一条途径。     

(k+1)-连通无K_(1,r)-图是Hamilton-连通的两个充分条件

一个图若不含与Ｋ１,ｒ（ｒ３）同构的导出子图,则称它为无Ｋ１,ｒ－图．本文将运用Ｔ－插点方法,通过对图的独立集的邻域交的研究,给出（ｋ＋１）－连通无Ｋ１,ｒ－图（ｒ４）是Ｈａｍｉｌｔｏｎ－连通的两个充分条件．     

新型1,4—二氮丁二烯液晶材料的合成及晶体结构？…

报道了９个新型１,４－二氮丁二烯「Ａｒ－Ｎ＝Ｃ（Ｒ）－Ｃ（Ｒ）＝Ｎ－Ａｒ,Ｒ＝Ｈ,Ｍｅ;Ａｒ＝ＣｎＨ２ｎ＋１Ｏ－Ｃ６Ｈ４,２,４－（Ｃ４Ｈ９Ｏ）（Ｍｅ）－Ｃ６Ｈ３」化和物的合成,并通过热台偏光显微镜对其就介晶性进形了研究,化合物９（Ａｒ－Ｎ＝Ｃ（Ｒ）＝Ｎ－Ａｒ,Ｒ＝Ｈ,Ａｒ＝２,４－（Ｍｅ）（Ｃ４Ｈ９Ｏ）Ｃ６Ｈ３）的单晶结构显示,晶体成单斜晶系,Ｐ２１／Ｃ空间群。晶胞参数为ａ＝０．７０７０３（３）     

新型大位阻取代茂钛,锆化合物合成及光谱分析

通过１－环庚燃基锂与６，６－二烷基富烯反应形成的取代茂锂试剂与ＭＣｌ４（Ｍ＝Ｔｉ，Ｚｒ）反 ，合成了１２个含或不含手性碳的大位阻取代茂金属有机化合物，并研究了它们的＾１ＨＮＭＲ，ＥＩＭＳ和ＩＲ。     

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