1—o—乙酰基—2,3,5—三—o—苯甲酰基—4—［9‘—（6’—氢— …

从１－ｏ－乙酰基－２,３,５－三－ｏ－苯甲酰基－４－溴－β－Ｄ－呋喃核糖出发,在溴化汞催化作用下,合成了３个４－取代的核苷化合物,其中２个化合物未见文献报道。     

2—甲基—1,2,5,6—四氢—5,6—二氧—1,2,4—三嗪—3—硫醇的合？…

研究了在甲醇的碱性介质中，通过１－甲基－１－氨基硫脲与草酸二乙酯的缩合反应制备医药中间体三嗪环。适宜的反应条件为１－甲基－１－氨基硫脲，草酸二乙酯、甲醇钠的量（摩尔）比为１：１．１：２．０，其收率可达６０％。     

2—氨基—4—甲基—6—甲氨基—1,3,5—三嗪合成

2—氨基—4—甲基—6—甲氧基—1,3,5—三嗪是合成磺酰脲类除草剂的主要中间体之一。本文报道了以双氰胺为原料,经加成,成环的合成路线,简化了文献报道的方法。     

1—取代—1—（1,2,4—三唑—1—基）—3,3—二甲基丁醇—2的合成

研究了连二亚硫酸钠对高位阻羰基化合物的还原反应;合成了十个标题化合物,它们的结构均得到IR,H’NMR 和 MS谱的确证。     

7,8—二甲基—3,6—二苯基—5—氧—8—氮螺[2.6]壬—4,9— …

利用手性源（２Ｒ,３Ｓ）－３,４－二甲基－２－苯基－１,４－氧氮杂Ｚｈｕｏ－５,７－二酮（１）合成了具有光学活性的７,８－二甲基－３,６－二苯基－５－氧－８－氮螺〔２．６〕壬－４,９－二酮（３）。测定了化合物（３）的晶体结构,并讨论了在五洄成反应中的不对称诱导作用的机理。     

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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