乘积空间的完备性与列紧子集的特征

设（Ｅｎ，ｄｎ）是距离空间（ｎ＝１，２，…），定义乘积空间为（П＾∞ｎ＝１Ｅｎ，Ｄ），ｄ（｛ｘｎ｝，｛ｙｎ－）＝Σ＾∞ｎ＝１Ｅｎ，ｄ）是完备距离空间当且仅当每个因子空间９Ｅｎ，ｄｎ）完备，子集Ａ∪→П＾∞Ｅｎ，列紧当且仅当Ａ在每个因子空间Ｅｎ中的投影πｎ（Ａ）列紧。     

乘积空间的完备性与列紧子集的特征

设（Ｅｎ，ｄｎ）是距离空间（ｎ＝１，２，…），定义其乘积空间为（Π∞ｎ＝１Ｅｎ，ｄ），ｄ（｛ｘｎ｝，｛ｙｎ｝）＝∑∞ｎ＝１１２ｎｄｎ（ｘｎ，ｙｎ）１＋ｄｎ（ｘｎ，ｙｎ）．本文证明了（Π∞ｎ＝１Ｅｎ，ｄ）是完备距离空间当且仅当每个因子空间（Ｅｎ，ｄｎ）完备，子集ＡΠ∞ｎ＝１Ｅｎ列紧当且仅当Ａ在每个因子空间Ｅｎ中的投影πｎ（Ａ）列紧．作为应用还给出了：可数紧的距离空间Ｘ（即存在紧子集ＤｎＸ，使Ｘ＝∪∞ｎ＝１Ｄｎ且≠ＤｎＤ０ｎ＋１，ｎ＝１，２，…）上的连续函数空间Ｃ（Ｘ），局部ｐ次可积函数空间Ｌｐｌｏｃ（Ｒ）以及序列空间Ｓ的完备性及其中子集列紧性的刻画     

Δ—伪度量族与Menger概率度量空间

引进了Δ－伪度量族概念,研究了Ｍｅｎｇｅｒ概率度量空间与Δ－伪度量族生成空间的关系,证明了每个Ｍｅｎｇｅｒ概率度量空间（Ｅ,Ｆ,Δ）都可由Ｅ上的一个Δ－伪度量族｛ｄλ｝λ∈（０,１）所确定．     

向量值鞅型序列与AL空间

设（Ω，ζ，Ｐ）是概率空间，Ｅ是Ｂａｎａｃｈ格，（１）若Ｅ是序连续的，则（ａ）Ｅ同构于一个ＡＬ空间等价于（ｂ）每一满足（Ｃ＾＋）条件Ｅ值拟上鞅必满足（Ｃ）条件；（２）若Ｅ是ＡＬ空间且具有ＲＮＰ，则（ａ）每一满足（Ｃ＾＋）条件的Ｅ值扩终下鞅强ａ．ｓ．收敛；（ｂ）每一满足（Ｃ＾＋）条件的Ｅ值依概渐近下鞅强ａ．ｓ．收敛；（ｃ）每一满足是（Ｃ＾＋）条件 Ｅ值ＧＢＴ强依概收敛。     

完备度量空间与紧度量空间上的不动点定理

Ｆｉｓｈｅｒ Ｂ证明了如下的不动点定理：设（ Ｘ，ｄ） 和（ Ｙ，ρ） 是完备的度量空间，Ｔ是Ｘ到Ｙ的连续映射，Ｓ是Ｙ到Ｘ的映射，并满足下列不等式，即对所有ｘ，ｘ′∈Ｘ，ｙ，ｙ′∈Ｙ，０ ≤Ｃ≤１。ｄ（ＳＴｘ，ＳＴｘ′） ≤Ｃｍａｘ｛ｄ（ｘ，ｘ′） ，ｄ（ｘ，ＳＴｘ），ｄ（ｘ′，ＳＴｘ′），ρ（ Ｔｘ，Ｔｘ′）｝，ρ（ＴＳｙ，ＴＳｙ′） ≤Ｃｍａｘ｛ρ（ｙ，ｙ′），ρ（ｙ，ＴＳｙ），ρ（ｙ′，ＴＳｙ′），ｄ（Ｓｙ，Ｓｙ′）｝，则ＳＴ在Ｘ中有唯一不动点ｚ，ＴＳ在Ｙ中有唯一不动点ｗ 。并且有Ｔｚ ＝ ｗ 和Ｓｗ ＝ ｚ。该文对此定理作一推广，从而得到了完备度量空间与紧度量空间上２ 个新的不动点定理。     

序列空间中的有限维分解性质

本文讨论可分Ｂａｎａｃｈ空间中的有限分解性质（ｆ、ｄ、ｄ、ｐ），并证明了：如果Ｘ具有ｆ、ｄ、ｄ、ｐ，则序列空间ｌｐ（Ｘ）（１≤ｐ〈∞）、ｃｏ（Ｘ）及Ｃｅｘｐ（Ｘ）（１〉ｐ〈∞）也具有ｆ、ｄ、ｄ、ｐ。     

Lindelof空间与（d—）仿紧（亚紧）空间的乘积

证明了可展的Ｌｉｎｄｅｌｏｆ空间与ｄ－仿紧的Ｐ空间的积是ｄ－仿紧的，Ｌｉｎｄｅｌｏｆ空间与仿紧（亚紧）的Ｐ空间之积是仿紧（亚紧）的，改进了Ｔａｍａｎｏ定理和已有文献的结果。     

数论函数中的R－空间的一个性质

本文证明了如果Ｔ是Ｒ－空间，ｆ是一个完全积性函数，若有ｋ次复系数非零多项式Ｐ（ｚ）使Ｐ（Ｅ）ｆ∈Ｔ，则一定有正整数Ｂ使（ＥＢ－１）ｋｆ∈Ｔ，Ｂ的所有素因子ｐ满足ｆ（ｐ）＝０，并且如果Ｐ（ｚ）是满足条件的最低次首１多项式，则Ｐ（ｚ）一定可以表示为若干个分圆多项式Ｆｄ（ｚ）的来积．此外使ｆ（ｐ）＝Ｏ的素数ｐ的个数不超过ｋ－１．     

关于弱凸Banach空间

本文引入Ｂａｎａｃｈ空间的弱凸性概念，证明弱凸性与（Ｅ）性质具有对偶性，以及ｌ￣Ｐ（Ｘ＿ｉ）（１＜ｐ＜∞）为弱凸空间的充要条件是每一个Ｘ＿ｉ是弱凸空间。     

G5作用下的上同调复射影空间

文献［１］作者讨论了Ｇ３作用下的上同调复射影空间Ｍ２ｎ,笔者主要考虑Ｇ５作用下的上同调复射影空间Ｍ２ｎ,证明文献［２］中提出的２个猜想当ｎ＝５和ｎ＝７时是正确的．定理１　（Ａ）若Ｄ５（Ｍ１０）≠,则Ｄ５（Ｍ１０）＝｛１｝;（Ｂ）若ＤＥ５（Ｍ１０）≠,则ＤＥ５（Ｍ１０）＝｛（１;５,０）｝．该定理即为Ｇ５作用于上同调复射影空间Ｍ１０的结果．对（Ａ）其证明需分ｄ＝１,ｄ≠１两种情况,对ｄ＝１笔者引用了文献［２］中定理１．３;对ｄ≠１,用穷举法分Ｃ１６×Ｃ１４＝２４种情况讨论．在（Ａ）的基础上证明…     

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