Lie-Poisson框架下的Dirac-Bargmann系统的可积性

研究和Lie代数so(2,1)对应的3×3 Dirac谱问题的非线性化,证明了该系统的非线性化特征值问题是具有Lie-Poisson结构的Poisson流形R3N上的广义Hamilton系统.进一步利用母函数法给出其可积性的证明.     

PN-流形上的Dirac结构

讨论PN 流形上的李代数胚和李双代数胚 ,以及PN 流形上的Dirac结构     

有关Poisson流形相关性质的讨论

文章给出了有关Poisson括号的一些性质,并利用Casimir函数对Poisson流形上的Poisson结构的性质进行了考察     

乘积Leibniz流形的结构性质

文章讨论了乘积Leibniz流形的结构性质,给出了乘积Leibniz流形的等价定义,得到了其上特有的Casimir函数,并利用乘积Leibniz流形的性质研究了Leibniz李群。     

Poisson流形上组合算符的拓展

文章对组合算符η进行了拓展，在Poisson流形上定义了一种更为广泛的新算符ζ，讨论了新算符ζ的相关性质，以及其在Poisson流形的李代数结构研究中的作用。     

乘积Poisson流形的若干性质

围绕乘积Ｐｏｉｓｏｎ流形,证明了与之相关的５条性质：乘积Ｐｏｉｓｓｏｎ流形Ｍ１×Ｍ２上的Ｐｏｉｓｏｎ括号的整体表示、Ｐｏｉｓｏｎ结构ｗ的整体表示,Ｍ１×Ｍ２上的Ｈａｍｉｌｔｏｎ向量场Ｈｆ的自然分解、特征分布π（Ｍ１×Ｍ２）的直和分解及乘积辛流形上的Ｐｏｉｓｏｎ括号的一条性质,乘积Ｐｏｉｓｏｎ流形的局部分裂     

一类非对称域的二阶不变微分算子

华罗庚和陆启铿以对称域的Cauhy 核H(Z,U)~(-1)定义了Poisson 核并证明:对于特征流形上固定的U,P(Z,U)可被Laplace·Beltrami 算子败零化。但对于非某些对称齐性Siegel 域,此形式Poisson 核未必能被Laplace-Beltrami 算子零化。而且如G 是有界齐性Siegel 域,且其形式Poisson 核能被Laplace-Beltrami 算子零化,则G 必为对称域。问题是,若G 为非对称齐性Siegel 城,是否有其它在其解析自同胚群Aut(G)     

Casimir函数在广义哈密顿控制系统中的应用

首先研究伪Poisson流形的Casimir函数与结构矩阵的关系,给出了伪Poisson流形存在Casimir函数的一个充要条件;然后利用所得结果研究扩张的广义哈密顿系统的构造问题,给出了扩张的广义哈密顿系统存在Casimir函数且保持能量守恒的2个充分条件.     

Poisson流形上李代数与Poisson辛李群的讨论

文章给出了Poisson流形上李括号的一些结论,并在Poisson流形P1,P2上定义了C^∞（P1）＋C^∞（P2）的{,}运算,验证了C^∞（P1）＋C^∞（P2）构成李代数,其次简单讨论了Poisson辛李群.     

切模丛的构造及其性质研究

本文在流形上构造了切模丛,在切模丛上给出了光滑结构使它成为一个光滑流形,然后讨论了切模丛的性质并给出了该模丛上的Poisson括号积使它成为一个李代数.     

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