关于一类Schrdinger方程的驻波解

给出了一类描述ＢｏｓｅＥｉｎｓｔｅｉｎ 凝聚的非线性Ｓｃｈｒｄｉｎｇｅｒ 方程的驻波解的存在性     

一参数Ornstein－Uhlenbeck过程的不可微模

设是一参数Ｏｒｎｓｔｅｉｎ－Ｕｈｌｅｎｂｅｃｋ过程，它是布朗运动粒子的速度的数学模型，是齐次马尔夫过程。本文将建立这类过程的不可微模。     

Einstein—Maxwell—Dilaton黑膜解辐射的探讨

通过对Ｅｉｎｓｔｅｉｎ－Ｍａｘｗｅｌｌ－Ｄｉｌａｔｏｎ（Ｅ－Ｍ－Ｄ）黑膜解的不带电粒子热辐射,带电粒子的热辐射,Ｓｔａｒｏｂｉｎｓｋｙ－Ｕｎｒｕｈ效应和粒子在此引力场中的引力结合能探讨,得到黑膜温度为一正有限值,粒子在引力场中的坐标能量为实数,可知Ｅ－Ｍ－Ｄ黑膜解中的参数Ｎ应受到若干限制。     

一参数Ornstein－Uhlenbeck过程的不可微模

设是一参数Ｏｒｎｓｔｅｉｎ－Ｕｈｌｅｎｂｅｃｋ过程，它是布朗运动粒子的速度的数学模型，是齐次马尔夫过程。本文将建立这类过程的不可微模。     

复射影空间中具有常数量法曲率的kaehler超曲面

设ＣＰｎ＋１（Ｃ）是ｎ＋１维复射影空间．本文获得了紧致Ｋａｅｈｌｅｒ超曲面是Ｅｉｎｓｔｅｉｎ超曲面的一个充分条件．     

黎曼流形中的非零截面曲率子流形

对非零截面曲率子流形何时是Ｅｉｎｓｔｅｉｎ流形的问题进行讨论,获得了一些结果．     

一种带有递减扰动项的粒子群优化算法

针对粒子群优化算法在进化后期存在收敛速度慢、容易陷入局部极值等问题,提出一种带有递减扰动项的改进粒子群优化算法.当进化中后期粒子位置更新过慢或保持相对不变时,通过在粒子速度更新公式中加入递减扰动项,有效地提高微粒进行全局和局部搜索的能力,减小粒子陷入局部最优的可能.基于随机过程理论分析证明了粒子的运动规律是一种马尔科夫...     

随机利率情形下的梯式期权定价模型

假设股票价格遵循布朗运动驱动下的随机微分方程,利用风险中性概率测度和在有限[0,T]区间上的具有漂移的布朗运动的最大值及其终值的联合分布,得到了随机利率情形下的梯式期权定价公式.     

微分几何中张量部分的教学研究

讨论在微分几何课程中关于张量的计算及应注意的问题．特别指出了在Ｅｉｎｓｔｅｉｎ和式公约中易犯的错误并揭示了ｇｉｋｇｋｌ＝δｌｋ与矩阵乘法的关系．证明了定理“曲面上一点处，两主曲率相等，则该点处一切方向均为主方向”，最后给出一些实例     

Bose—Einstein凝聚相干输出的量子多体理论：Ⅰ.因子化与原子相干

基于热力学极限下的Ｂｏｇｏｌｉｕｂｏｖ近似，提出了描述磁阱陷中Ｂｏｓｅ型原子输出到自由传播了模式的线性量子多体理论。证明如果阱陷中的原子开始处于Ｂｏｓｅ－Ｅｉｎｓｔｅｉｎ凝聚状态，由于演化波函数的因子化结构，输出的原子将处于一个由多体相干态描述的宏观量子态上，即输出的原子束是相干的。该理论给出了计算输出原子谱分布及至空间分布的一般公式。     

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     

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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