Lie-poisson结构下一个新的有限维完全可积系统

研究3×3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.     

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.     

Lie-Poisson框架下一个新的Hamilton系统的可积性

研究一个3×3形式的谱问题的非线性化,证明了该3×3特征值问题的非线性化是具有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.     

一个Bargmann系统及一类演化方程的对合解

通过一个特征值问题的非线性化,得到一个Bargmann系统并证明它是Liouville意义下的完全可积系统,同时给出了与这个特征值问题相联系的演化方程解的对合表示.     

与三阶特征值问题相联系的可积系及对合解

基于特征值问题的非线性化方法,得到与三阶特征值问题相联系的有限维系统,利用生成函数证明此系统是Liouville意义下的完全可积系统,并借助可积系统的解,给出发展方程族的解的对合表示.     

双非线性化Toda特征值问题的Lie-Poisson结构

利用Hamilton对称群的作用不变量,将R4N上具有标准辛结构的双非线性化Toda特征值问题约化为R4N/(R＞0)N上Lie-Poisson结构下的3×3非线性化特征值问题;并进一步讨论了该3×3非线性化特征值问题与R2N上标准辛结构下的2×2非线性化特征值问题之间的关系.     

一个双非线性化离散特征值问题的约化和Lie-Poisson结构

通过约化理论,研究了对应于同一离散孤立子方程族的三个离散特征值问题的非线性化特征值问题以及它们之间的关系.     

一个新的含非线性位势的谱问题及可积系

对一个新的带非线性位势u^2的特征值问题及相应的辅谱问题进行研究，得到一族新的孤子方程，并由此导出一个新的(2 1)维可积模型．通过将特征值问题非线性化，得到一个完全可积的有限维Hamilton系统，并给出两族对合的守恒积分．     

一个有限维可积系统

对一个特征值及其伴随特征值问题非线性化 ,得到一个有限维Hamilton系统 ,并得到这个系统的Lax表示和r 矩阵 .通过r 矩阵 ,得到 4N个函数不相关并互相对合的运动积分 ,由此证明了Liouville意义下的完全可积性 .     

Kaup-Newell系统与AKNS系统的联系以及Kaup-Newell系统Darboux变换(英文)

本文考虑了Kaup-Newell特征值问题及AKNS特征值问题以及与这两特征值问题相联系的非线性演化方程。利用规范变换,我们得到了与Kaup-Newell特征值问题相联系的一族非线性演化方程和与AKNS特征值问题相联系的一族非线性演化方程之间的一个对应关系,并给出了Kaup-Newell系统的Darboux变换及其证明。     

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.     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with