复值随机变量的线性等价类

定义复值随机变量的一种等价类，指出如果m(Z)是某种复值正态随机变量Z的线性等价类，存在m(Z)中的复值随机变量的线性组合不属于m(Z)．     

对称随机变量线性组合的封闭性

在给出多维对称随机变量分布函数一个充要条件证明的基础上,阐明对称随机变量的线性组合仍是对称随机变量.进一步,应用得到的结果讨论了关于对称随机变量序列部分和的一个不等式.     

随机变量序列几乎处处收敛的几个等价命题

由随机变量序列几乎处处收敛可推出其依概率收敛，进而可推出其依分布收敛，可见判别几乎处处收敛的重要性．给出了它的几个等价命题，同时还证明了独立随机变量和序列几乎处处收敛等价于依概率收敛，亦等价于依分布收敛．     

卷积公式在求连续型随机变量和分布中的应用

对卷积公式进行推广,得到了求二维连续型随机变量线性组合分布的卷积公式,该方法在求二维连续型随机变量线性组合分布时较分布函数法更加简洁、高效,更适用于此类问题的求解。     

关于服从二维指数分布的非独立随机变量线性组合分布的修正

通过建立二维随机变量(X,Y)的线性组合αX+βY的概率密度函数的推导公式,给出了在可靠性工程中应用最广泛的二维指数分布的线性组合的概率分布.     

一个构造χ^2分布的充要条件及其推广

本文先给出了随机变量平方服从Γ分布的充要条件，随之解决了随机变量服从χ＾２分布的充要条件。并将这一结果推广到连续型的指数分布族。基于一个随机变量平方的分布确定以后，它本身的可以无限复杂。因此本文进而给出了χ＾２分布与标准正态分布能相互确定的等价条件。     

新的Bernstein积分型算子的逼近定理

对Bernstein算子给出新的积分型修正,同时定义了该修正算子的线性组合,并对该组合算子的逼近阶以及算子导数与函数光滑性间的关系进行深入的研究,建立了逼近等价定理.     

一个构造X~2分布的充要条件及其推广

本文先给出了随机变量平方服从Γ分布的充要条件，随之解决了随机变量服从Ｘ￣２分布的充要条件。并将这一结果推广到连续型的指数分布族。基于一个随机变量平方的分布确定以后，它本身的分布可以无限复杂。因此本文进而给出了Ｘ￣２分布与标准正态分布能相互确定的等价条件。     

关于Fuzzy随机变量的进一步讨论

本文在[1]的基础上,给出了Fuzzy随机变量的等价定义,讨论了Fuzzy随机变量的性质,以及Fuzzy随机变量的期望与方差,并在此基础上给出了取值在F(R~1)上的Fuzzy随机变量的期望和方差的计算方法。     

Lupas-Baskakov型算子线性组合逼近的两个结论

讨论Lupas-Baskakov型算子2r阶线性组合的逼近,并给出其高阶逼近等价定理。     

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