关于列相容不变性

在本文中,我们给出了两个局部凸可分离拓扑列相容的定义,并证明了有界集和在一定条件下凸的列闭集是列相容不变的。     

条件改变下抽球结果的不变性问题及其应用

本文通过对两个引理、一个定理、一个推广的探讨,得出了一类不论条件怎样改变,抽球结果都只与初始时罐中球的比重有关这一重要结论,并给出了这一结论的应用。     

不变性原理及动力系统的渐近性态

本文应用不变性原理研究动力系统的渐近性态,引入表征在度量空间的子集中的运动速度有界的新概念,建立关于度量空间中动力系统轨线渐近性态的两个定理和关于不稳定的定理,推广了已有的一些结果.     

矩阵的Kronecker乘积的几个性质

矩阵的Ｋｒｏｎｅｃｋｅｒ乘积是一种很重要的矩阵乘积,它在线性矩阵方程、微分方程的研究中起到了一定的作用,文章主要研究矩阵的Ｋｒｏｎｅｃｋｅｒ乘积的几个性质,特别是不变性,最后还给出实数域上两个方阵的ｋｒｏｎｅｃｋｅｒ乘积正定的一个充分条件。     

三量子位Heisenberg XXX链中杂质对纠缠的影响

研究了含杂质三量子位Heisenberg XXX 链中的纠缠现象,并给出了纠缠C的解析表达式.结果发现对杂质格点与正常格点间的纠缠,C只存在于J1＞J(当J＞0时)和J1＞0(当J＜0时)两个区域,且在这两个区域内纠缠C和纠缠存在的临界温度Tc均随着J1的增大而增大;当J1(≥)|J|时,C=0.5,Tc=3.41448 J1.对正常格点间的纠缠,C只存在于J＞0且-2J＜J1＜J,在该区域内随着J1的增大,纠缠C和纠缠存在的临界温度Tc均先增大而后逐渐减小为零,当J1=0时它们分别达到最大值Cmax=(e4J/T-3)/(e4J/T+3)和Tcmax=4J/ln3.     

光学相关不变性模式识别的局限性及其出路

本文运用神经网络理论分析了光学相关不变性模式识别的局限性,在保持光学相关模式识别方法的合理内涵的基础上,提出了基于两层神经网络的不变性模式识别方法,分析了这种方法的普适性、适应性、最优并行性及其在硬件实现上的优点,并给出该方法用于多个飞行目标多畸变不变性识别的实验结果．     

海滨锦葵杂交后代的RAPD分析

报道了海滨锦葵植物基因组DNA的提取方法、RAPD(随机扩增多态性)-PCR(聚合酶链式反应)反应程序及RAPD标记对海滨锦葵两对组合亲本及其杂交后代进行的分子鉴定.初筛出的38个引物中有20个(52.6%)能在J2×J1组合亲本间扩增出31条特征带,初筛出的32个引物中有8个能在J3×J4组合亲本间扩增出12条特征带.组合J2×J1的8个杂交后代用OPB15引物扩增后均表现出父本J2的特征带,是真杂种;组合J3×J4的28个后代用引物OPB15扩增后,表现父本特征带的F1代个体数为24个,为真杂种,其余4个为假杂种.     

平面引力波能量密度的规范不变性

本文在线性与严格平面引力波情况下,讨论了不同的引力场能量动量表达式所定义的能量密度的引力规范不变性问题,并指出这两种情况仅为协变无迹能量、动量、张量给出规范不变的能量密度.     

高校教师社会保障的调查及对策研究——以J大学为例

通过对J大学的实证案例,在调查研究的基础上,分析了J大学教师社会保障制度存在的主要问题及其成因,从国家和高校两个层面提出了完善J大学教师社会保障制度的若干对策。     

多个超导磁通量子比特的可控耦合

通过在两个或者三个超导磁通量子比特中插入一个耦合线圈，使得超导磁通量子比特与线圈有一个强的相互作用。耦合线圈的磁通直接影响两个超导磁通量子比特的耦合强度J，因此可以通过对线圈磁通的控制来调控超导磁通量子比特的耦合强度J。     

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