η—ξ时空中费米场的热性质

指出了η-ξ时空中的费米场对Ｍｉｎｋｏｗｓｋｉ观测者具有热性质，费米场热力学格林函数的虚时反周期边界条件来源于旋量的洛仑兹变换性质。证明了η-ξ时空欧氏截面上的真空格林函数等于Ｍｉｎｋｏｗｓｋｉ时空中的虚时热力学格林函数，而η－ξ时空洛仑兹截面上的真空格林函数对应于Ｍｉｎｋｏｗｓｋｉ时空中的实时间热力学格林函数。     

EPD方程边值问题

在角形区域{ξ=η,η≥0}中研究EPD方程奇性第三问题已有结果。1981年,有人研究了{ξ=η,ξ=-η,ξ≥0}区域第三问题,采用了分解函数为奇、偶部分,化为两     

乳腺癌PKCs表达与其分化程度的相关性

为了研究蛋白激酶C（PKC）和乳腺癌分化及转移的相关性，采用免疫组化SABC方法检测48例人乳腺癌的PKC蛋白表达，包括PKCα、βI、η和ξ等蛋白。结果表明，与分化低的乳腺癌对比，分化高的乳腺癌PKC蛋白表达水平提高。在临床I－II和III级的乳腺癌中，PKCη蛋白表达率分别为61．5％和9．1％，具有显著意义（P＜0．05），PKCξ蛋白表达率分别为92．3％和27．3％，具有极显著意义（P＜0．01）。另外，在乳腺癌未转移的病例中，PKCs蛋白表达水平普遍较高，其中PKCξ与肿转移相关性极显著（P＜0．01）。此外，PKCs蛋白表达水平与肿瘤患者年龄无关。以上结果提示，PKCη和PKCξ有可能作为评价临床乳腺癌分化和转移程度的指标之一。     

海船监控调度系统中时态问题研究

时空数据库是时态GIS的组织核心，时空数据模型是时空数据库的理论基础．以海上船舶监控调度系统为例，分析了时空数据、时空数据模型的特点和时态关系，研究了时空数据建棋思路．进而设计了针对移动目标的时空数据库模型，并实现了海船监控调度系统中移动目标信息的表达和时空数据的查询和表现．     

时空数据模型的研究进展评述

时空数据模型是研究地学时空过程的基础数据设施条件．在介绍时空数据模型的研究进展的同时也讨论了当前主要时空数据模型的优缺点．时空数据模型根据其建模思路主要地可分为4类，即着重于描述时空状态序列的过程模型，着重于描述某个时间点上形成的时空因果联系的时间点模型，意图全面描述时空关系的面向对象的模型以及满足特定时空推理方法要求的专用数据模型．时空对象的特征变化过程、空间关系以及时序关系的表达在时空数据模型的研究中讨论得比较广泛而深入，但是针对时空中的相互作用过程及存在于其中的时空因果联系以及针对时空不确定性的表达研究目前仍显不足，需要进一步研究．针对特定时空推理算法的专用时空数据模型需要与时空推理模型的研究紧密结合才能取得同步发展．越来越多的多源异构时空数据需要一个逻辑上的集成模型以实现一体化的数据管理，这方面的研究也需要进一步深入．     

向量理论在概率论中的应用

通过在概率论中引入"零变量"概念,首次将向量空间理论应用于概率论的研究中,得到了同一样本空间Ω上的全体随机变量所成的集合是一向量空间的结论,并且证明了两个随机变量ξ,η的协方差即是向量ξ,η的内积ξ,η,继而得出同一样本空间Ω上的全体随机变量所成集合成为一欧氏空间,从代数学的角度给予了概率论中的若干概念全新的解释。     

广义时空变换理论

以复四元数为时空代数，建立了一个广义时空变换理论．这个理论的主要部分包括广义场，时空变换和运动理论．作为狭义相对论的发展，理论中的变换适合任意的运动，从而可以构成相对论物理学的更为完整的理论基础．     

奇型偏微分方程

§1.前言考虑一类含奇线的偏微分方程:(()~2υ)/(()ξ()η)-a/(ξ-η)()υ/()ξ+b/ξ-η()υ/()η-c/(ξ-η)~2υ=0,其中 a,b,c 均系常数。它称为 Euler-Poisson-Darboux 方程;或简写为 EPD 方程。因为最早是 Euler,以后是 Poisson 对它的特殊情形进行过研究,Darboux在它的名著“曲面论”一书中作了系统的结总。其实历史上研究过方程(1.1)的著名     

线性回归分析法和二极管伏安特性曲线的数据处理

通常,我们在研究二个变量的关系时,总是将测量出的各组数据(x_i、y)作图,得到y与x的函数曲线。根据曲线的形状和规律,找出合适的数学形式。我们也可将曲线y=f(x)通过y→ξ及y→η变换成直线η=A_e+B_eξ,则作出的ξ-η曲线是一条直线。 若ξ-η曲线不是一条直线,则说明x与y的关系找得不合适,必须重找。若ξ-η曲     

另一類型的序数方程

§1.根据序数正常表示的唯一性,M.Sierpi ski证明了方程ξ~2=η~3+1没有超限序数解;王戍堂和王克显拓广了这一结果证明了更广一类的序数方程ξ~n=η~(n+1)+1没有超限序数解,此处n>1是自然数.本文目的在于研究另一类型的序数方程ξ~2=η~ +1和ξ~n=η~( n)+1之求解问题. §2.首先证明     

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     

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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