两类循环矩阵求逆的简便算法

利用多项式矩阵的初等行变换给出的r-循环矩阵和对称r-循环矩阵求逆的简便算法.     

包含Chebyshev多项式的r-循环矩阵的谱范数

研究包含第一类Chebyshev多项式和第二类Chebyshev多项式的r-循环矩阵的谱范数,并由矩阵范数和Chebyshev多项式的性质,通过代数方法给出谱范数的上下界估计.     

分圆多项式及其变形的一点注记

分圆多项式的性质在密码学领域具有重要的应用,研究分圆多项式的性质具有重要的理论意义.就分圆多项式在整体函数域中的模拟及由映射的复合所诱导的动力分圆多项式进行研究.结合动力系统的思想,利用数论的方法,给出了与动力分圆多项式相关的若干性质的证明.经典分圆理论在不同的背景下具有很多相似之处,这对丰富分圆理论具有重要的意义.     

关于Chebyshev多项式的首尾差r-循环矩阵的行列式

基于多项式因式分解的逆变换,主要研究包含第一、二类Chebyshev多项式的首尾差r-循环矩阵和首尾差r-左循环矩阵的行列式,给出由Chebyshev多项式及参数r确定的具体表达式,最后给出一个具体的数值例子.     

第二类r-循环矩阵的判定条件及其对角化

利用第二类r-循环矩阵的概念,给出了几个充要条件;利用它的相似标准型,给出了第二类r-循环矩阵非奇异的条件、逆矩阵表达式.     

r-H-循环矩阵的性质及其逆的多项式算法

提出了r-H-循环矩阵的概念,并得到r-H-循环矩阵的五个等价条件和两个非奇异性的充要条件.此外,利用r-H循环矩阵与多项式之间的关系以及r-H循环矩阵非奇异性和奇异性的充要条件,给出r-H-循环矩阵逆的多项式算法.最后,根据r-H-循环矩阵的结构特点,给出了一些数值例子.     

对称循环矩阵与次对称循环矩阵

给出了对称循环矩阵与次对称循环矩阵的概念，研究了它们的一些性质及相互间的关系。     

r-块置换因子循环矩阵及其逆矩阵的求法

给出了r-块置换因子循环矩阵的定义,借助于Kronecker积讨论了r-块置换因子循环矩阵的基本性质,并证明了r-块置换因子循环矩阵具有可交换性,即AB=BA。然后在r-块置换因子循环矩阵对角化的基础上给出了其行列式的计算方法以及非奇异矩阵的充要条件。最后,给出了非奇异的r-块置换因子循环矩阵的逆矩阵求法。     

多项式Bezout矩阵的约化与Vandermonde矩阵的逆

讨论了一般多项式基的多项式Bezout矩阵的约化、多项式基Vandermonde矩阵的逆以及它们之间的关系,方法是利用标准幂基到一般多项式基的转移关系.     

对称循环矩阵与次对称循环矩阵

给出了对称循环矩阵与次对称循环矩阵的概念，研究了它们的一些性质及相互间的关系     

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