含氮含硫有机物的键裂能的计算

】本文建立了用基团电负性计算含氮含硫有机物的键裂能的简单方法。利用此方法计算出２２个含氮含硫烷基衍生物的键裂能，其平均偏差为３．９７ｋＪ·ｍｏｌ－１。     

含氮含硫的有机物的键裂能的计算

本文建立了用基团电负性计算含氮含硫有机物的键裂能的简单方法。利用此方法计算出２２个含氮含硫烷基衍生物的键裂能，其平均偏差为３．９７ｋＪ·ｍｏｌ＾－１     

含氮含硫有机物的键裂能和自由基的标准生成热的计算

建立了用基团电负性计算含氮含硫有机物键裂能的简单方法，并且得到自由基标准生成热的计算方法。计算了一些含氮含硫有机物键裂能及自由基的标准生成热，平均偏差分别为３．６１ｋＪ·ｍｏｌ－１，２．４２ｋＪ·ｍｏｌ－１。     

正链含硫含氮有机物的标准汽化热的经验计算式

利用基团电负性建立了一个计算直链含硫含氮有机物标准汽化热的简单方法，并计算了一些直链含硫含氮有机物的汽化热，４４个可比较值的平均偏差为０．６８ｋＪ·ｍｏｌ－１．     

含氮含硫有机物标准生成热的计算

建立了利用基团电负性计算含氮含硫有机物标准生成热的简单方法，利用此方法计算了一些常见含氮含硫有机物的标准生成热，３８个可比较值的平均偏差为３．８１ｋＪ·ｍｏｌ（－１）。     

诱导效应指数与CH_3-X/H-X的键裂能之差

利用诱导效应指数Ｉ，建立了计算一些ＣＨ３－Ｘ的键裂能的方法，并计算了一些甲基衍生物ＣＨ３－Ｘ的键裂能，其平均偏差为１．９３ｋＪ·ｍｏｌ－１。同时，推导出由ＤＨＯｍ（ＨＸ）和Ｉ计算烷基衍生物的键裂能的方法。２３个可比较值的平均偏差为２．６８ｋＪ·ｍｏｌ－１。     

基团电负性与含氮含硫有机物的标准生成热

本文利用基团电负性建立了一个用以计算含氮含硫有机物标准生成热的简单方法,利用此方法计算了一些常见含氮含硫有机物的标准生成热,36个可比较值的平均偏差为1.88kJ/mol。     

诱导效应指数与含硫含氮有机物的标准生成热

利用诱导效应指数建立了一个用以计算合硫含氮有机物标准生成热的简单方法，利用此法计算了一些常见含硫含氮有机物的标准生成热，３２个可比较值的平均偏差为２．６ｋＪ·ｍｏｌ－１。     

诱导效应指数与烷基衍生物某些热力学参数的关系

利用诱导效应指数，分别建立了计算烷基衍生物的标准生成热、键裂能的方法，并且得到自由基的生成热的计算方法。计算了一些烷基衍生物的标准生成热、键裂能及自由基的标准生成热，平均偏差分别为２．１８ｋＪ·ｍｏｌ－１，２．３９ｋＪ·ｍｏｌ－１，１．８７ｋＪ·ｍｏｌ－１。     

基团电负性与CH3—X和R—X的键裂能关系

利用基团电负性ＸＧ分别建立了计算ＣＨ３－Ｘ键与Ｒ－Ｘ键的键裂能方法。计算得到的８个ＣＨ３－Ｘ，２０个Ｒ－Ｘ可比较数据的平均偏差分别为２．０６ｋＪ．ｍｏｌ＾－１，２．６７ｋＪ．ｍｏｌ＾－１。     

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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