TKK代数的一类表示

研究对应于欧氏空间中最小半格S的Tits—Kantor-Koecher李代数￡(￡(S))的泛中心扩张￡^-(￡(S))的表示．这里￡(S)为关于半格S的Jordan代数．首先将该李代数的结构等式表示为一系列形式幂级数等式．然后利用关于量子环面上gln型李代数的顶点表示及由群代数与对称代数组成的Fock空间．构造了一组作用于Fock空间的顶点算子．最后通过验证所定义的顶点算子满足该无穷维李代数的所有幂级数等式．证明了这些顶点算子在这一Fock空间上给出了TKK李代数￡^-(￡(S))的一个Boson场顶点表示．     

广义TKK代数的一类Boson表示

研究对应于欧式空间中非格半格S的Tits-Kantor-Koecher(TKK)李代数g(T(S))的泛中心扩张广义TKK代数g(T(S))的一类Boson场表示.首先将广义TKK代数g(T)的结构等式表示为一系列形式幂级数等式,然后利用关于量子环面上gln型李代数的顶点表示及由群代数与对称代数组成的Fock空间,构造一组作用于Fock空间的顶点算子.最后,证明这些顶点算子在这Fock空间上给出了广义TKK代数g(T)的一个Boson场顶点表示.     

量子纯态与混合态的几何代数分析

采用几何代数的方法对两能级量子系统的状态进行描述与特性分析,借助于量子系统的密度矩阵,对量子纯态和混合态的几何表示进行了详细的推导,对比Bloch矢量与几何代数的表示方法,给出2种表示法之间的对应关系。     

厄米对称空间上的非线性Schrdinger方程的量子反散射方法Ⅲ:B.D.Ⅰ.情形

本文研究厄米对称空间B.D.I.上的非线性Schrdinger方程的量子可积性,并对其经典极限作了讨论。     

厄米对称空间上的非线性 Schrdinger 方程的量子反散射方法 Ⅰ:C.Ⅰ.情形

本文应用量子反散射方法研究厄米对称空间C.I.上的非线性Schr(?)dinger 方程。通过求解经典和量子Yang-Baxter 关系,建立了散射数据之间的经典泊松括号和量子对易关系。我们的结果表明,量子R 矩阵和经典r 矩阵满足通常的Izergin-Korepin 关系。     

量子可积系统和量子代数结构几个问题的研究

近几十年来,量子可积系统和量子代数对称性的研究是数学物理领域中非常活跃的课题.这方面的研究不仅揭示了数学,物理等领域中许多不同分支之间的一些相互联系,更重要的是提出了许多重要的新概念和新方法,发现了一些新的代数结构,为物理学相关问题的研究提供了更广泛的基础...     

关于量子普适包络代数变形振子表示的若干讨论

本文回顾了量子普适包络代数及其变形振子表示的基本概念,讨论了两参数变形的量子代数,并建立了相应的两参数变形振子表示。利用这一表示,导出了若干q变形的组合恒等式,并用来证明了变形的双模Fock空间一种完备性关系。     

物理计算的保真与代数动力学算法——Ⅳ．偏微分演化方程的代数动力学解法与算法

讨论了非线性偏微分动力学系统的演化方程的代数动力学解法与算法．首先,引进时间平移泛函偏微分算子,把偏微分方程的初值问题提升为泛函偏微分方程的初值问题,建立起泛函空间的代数动力学运动方程;把物理场的动力学系统的时间演化的局域微分规律和整体积分规律,用泛函空间的李代数和李群的语言表示出来;在泛函空间的代数动力学的框架内求得了用时间的Taylor级数表示的局域收敛的偏微分方程的精确解．在时间的Taylor级数表示的精确解的有限项截断近似下,建立起一种新的偏微分方程的数值求解方法．泛函空间的代数动力学算法．讨论了偏微分方程的数值求解中时间因果关联与空间地域关联之间的交织及其处理方案．     

量子环面上导子李代数的一类不可约权模

量子环面是一类重要的非交换环面,它与高维仿射李代数的关系十分密切,它的导子李代数也在高维仿射李代数的表示理论里有着重要的作用.设D是一个有n+1个变量的量子环面,且其中有n个变量是相互交换的.本文对量子环面D的导子李代数给出了一类权模,证明这些模是权空间有限维的不可约模,并决定了它们的权的支集.     

套代数上的一类非线性中心化子

为了推广算子代数中的基本理论,对一类非线性映射成为套代数上的可加中心化子的条件进行了研究。首先,基于Hilbert空间上的非平凡套定义与该套有关的套代数,并定义套代数上的一个非线性映射;其次,采用矩阵分块方法获得关于此映射的几个性质;最后,证明套代数上满足某种条件的非线性映射为可加中心化子,给出刻画该映射的具体形式。结果表明,套代数上满足某种条件的非线性映射为可加中心化子,且可完全刻画。研究结果推广了非线性映射成为套代数上可加中心化子的结论,丰富了算子代数拓扑结构的分类问题,为套代数上其他类型非线性映射问题的刻画提供了借鉴与参考。     

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.     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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