乙醇—乙酸二元系统低恒压力的气液平衡

用自制气液平衡釜测定了乙醇－乙酸二元系统在７．９９９ｋＰａ（Ⅰ），５．３３３ｋＰａ（Ⅱ）和２．６６７ｋＰａ（Ⅲ）条件下３套恒压气液平衡数据。其中在（Ｉ）条件下测量平衡系统的Ｔ－ｐ－ｘ－ｙ数据，并用逐点法校验，符合热力学一致性（Ⅱ），（Ⅲ）条件下平衡数据采用测定Ｔ－ｐ－ｘ推算ｙ的间接方法，并对气相组成进行实测校验，结果良好，３套恒压数据用单纯形法优化ＮＲＴＬ方程参数，拟合结果令人满意。     

低公害混合氯氟烃（R22－R142b）汽液平衡的研究

自行设计、安装、调试了一套测定汽液平衡的装置，并建立一种取样分析方法，可用于测量低压至高压的压力范围．用此装置和分析方法于２８３．１Ｋ，２７８．０Ｋ，２７３．３Ｋ，２６８．１Ｋ，２６３．０Ｋ，２５８．２Ｋ，２５３．１Ｋ和２４８．０Ｋ共８个温度下，测定了Ｒ２２－Ｒ１４２ｂ二元系统汽液平衡（ＶＬＥ），压力范围由６５．８６ｋＰａ至６２１．１２ｋＰａ．实验数据通过了热力学一致性校验。并用状态方程法进行了关联，取得比较满意的结果．     

一类非线性微分方程周期解的存在唯一性

本文研究了具有多个奇点的非线性系统｛Ｘ＝Φ（ｘ）ｐ（ｙ） ｙ＝－ｆ（ｘ，ｙ）φ（ｙ）ｐ（ｙ）－ｇ（ｘ）η（ｙ）的财期的存在唯一性，所得结果推广和改进了参考文献３－５中所介绍的工作。     

短波长In_xGa_（1－x）As_yP_（1－y）材料的LP－MOVPE生长

本文研究了用低压金属有机化学气相外延（ＬＰ－ＭＯＶＰＥ）技术，以三申基镓（ＴＭＧａ）、三甲基铟（ＴＭＩｎ）为Ⅲ族源，ＡｓＨ＿３和ＰＨ＿３为Ⅴ族源，在（１００）方向掺Ｓ的ｎ￣＋ＩｎＰ衬底上生长短波长Ｉｎ＿ｘＧａ＿（１－ｘ）Ａｓ＿ｙＰ＿（１－ｙ）材料的生长条件，并用双晶Ｘ射线衍射（ＤＣＤ）和光荧光（ＰＬ）对不同条件下生长的短波长Ｉｎ＿ｘＧａ＿（１－ｘ）Ａｓ＿ｙＰ＿（１－ｙ）材料进行了表征。     

关于丢番图方程x^3±1=Dy^2

对于丢番图方程（１）ｘ＾３＋１＝Ｄｙ＾２和（２）ｘ＾２－１＝Ｄｙ＾２。本文用静初等方法证明了以下结果：（１）设Ｄ＝２＾α．３．ｐ或２＾α．３，ｐП１，这里ｐ、ｑ均是奇素数，ａ＝０或ｑ－５（ｍｏｄ６）（ｉ＝１，…，ｓ），ｓ＝１或２，则当ｐ∈（７，１３，３１，６１，７３，７９，９７）时方程（１）除开Ｄ＝３．５．９７仅有解（ｘ，ｙ）＝（３１４，５４３）外，无其他的正整数解，而方程（２）除开Ｄ＝３．５．９     

关于丢番图方程x4±y4=zp

研究了丢番图方程（１）ｘ４＋ｙ４＝ｚｐ,（ｘ,ｙ）＝１和（２）ｘ４－ｙ４＝ｚｐ,（ｘ,ｙ）＝１的正整数解,证明了：①当ｐ＝３时,方程（１）和方程（２）均无正整数解;②当ｐ＞３是素数,ｐ±１（ｍｏｄ８）时,方程（１）的正整数解满足２ｐ｜ｘ或２ｐ｜ｙ;③当ｐ＞３是素数时,方程（２）的正整数解满足２ｐ｜ｘ或２ｐ｜ｙ或２ｐ｜ｚ．     

红外光谱中溶剂效应机理研究（Ⅴ）：有机锡络合物红外光谱的溶…

用Ｃｙ２ＢｕＳｎＯ２Ｃ－Ｃ６Ｈ４－ｘ，Ｃｙ２ＭｅＳｎＯ２Ｃ－Ｃ６Ｈ４－ｘ，ＣｙＢｕ２ＳｎＯ２Ｃ－Ｃ６Ｈ４－ｘ（ｘ＝Ｈ，ｐ－ＣＨ３，ｐ－ＣＨ３Ｏ，ｐ－ＮＯ２，ｐ－Ｆ，ｐ－Ｃｌ，ｐ－Ｉ，ｐ－ＯＨ，ｐ－ＮＨ，ｍ－ＮＯ２，ｍ－ＣＨ３Ｏ）３个系列共１８种取代苯甲酸配位的有机锡络合物在１３种有机溶剂（环己烷、正庚烷、四氯化碳、苯、甲苯、乙醚、氯仿、二氯甲烷、１，２－二氯乙烷、四氢呋喃、对二氧六环、乙腈）中的羰     

三元体系相平衡问题的研究

测定了２．３－二氯丙烯（１）－环氧氯丙烷（２）完全互溶二元体系恒压下的气液平衡数据，２，３－二氯丙烯（１）－水（３）、环氧氯丙烷（２）－水（３）部分互溶二元体系的相互溶解度数据，同时测定了２．３－二氯丙烯（１）－－环氧氯丙烷（２）－水（３）于５个不同温度下的液液平衡数据。用单纯形法回归出ＵＮＩＱＵＡＣ方程参数，并对完全互溶二元体系的汽液平衡及三元体系的液液平衡进行了计算。结果与实验值较一致。     

关于不定方程x^4—pqy^2=1

设ｐ、ｑ是不同的奇素数，ｐ≡３（ｍｏｄ４），本文证明了当ｑ＝５或１３时，不定方程ｘ＾４－ｐｑｙ＾２＝１仅在ｐ＝３时有正整数解，其唯一的正整数解为（ｘ，ｙ）＝（２，１）或（ｘ，ｙ）＝（５，４）。根据此结果和已有的大量结果可以确定不定方程ｘ＾４－Ｄｙ＾２＝１在１〈Ｄ〈１００的范围之内的全部正整数解。     

解色散方程四点显式差分格式的稳定条件

用代数方法求出了一个分式函数（Ｆｙ，ｐ０，ｐ１，ｐ２）的极大极小值，从而证明了作者原先给出的色散方程中四点显格式的最佳稳定条件为│αΔｔ／ｘ＾３│≤ｍａｘｍｉｎＦ（ｙ，ｐ１，ｐ１，ｐ２）＝２ｐ０＋１／４这里，ｐ１是参数，满足下条条件之一：１，ｐ１／－１／２，ｐ０＝０，Ｐ２〉０ ２．ｐ１≥０，ｐ０＝αｐ１，ｐ２＝βｐ１，α＾２－２β＋２αβ≤０，β≥α〉０ ３．ｐ２＝０，ｐ０＝αｐ１〉０，α〈０，     

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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