标准平衡常数与平衡常数

按照SI制的规定,在化学平衡中引入标准平衡常数。本文介绍标准平衡常数以及它在各个反应体系中的具体形式。并讨论标准平衡常数与实验平衡常数之间的关系。最后,讨论了引入标准平衡常数带来的种种方便。     

标准平衡常数和平衡常数

本文从标准化学势的定义出发 ,导出各反应类型的标准平衡常数 ,并讨论了标准平衡常数 K 和平衡常数 K的区别和联系     

标准平衡常数和平衡常数

本文从标准化学势的定义出发,导出各反应类型的标准平衡常数,并讨论了标准平衡常数K。和平衡常数K的区别和联系     

平衡常数有关问题的探讨

文章探讨了经验平衡常数和标准平衡常数之间的区别和关系，以及对气体、溶液中如何导出Ｋ计算公式。     

平衡常数K~O、K~C、K~M在分析化学中的应用

本文分析了活度平衡常数、浓度平衡常数、混合平衡常数在分析化学中的具体应用。指出三个常数之间的联系区别及应用要点。     

无机化学教学中有关平衡常数问题的讨论

针对平衡常数教学中存在的若干问题进行了分析和讨论，文中建议：全面推行标准平衡常数，取消不严密的表示方式，不讨论平衡常数的量纲，改进浓度等符号表示，统一各种常数及相关问题的表示。     

关于化学反应平衡常数的讨论

对各种类型的化学反应平衡常数进行了讨论 ,包括平衡常数的引出及与温度、压力、方程式的书写等各类因素的关系     

无机化学教学中如何正确理解和应用平衡常数

对两种化学平衡常数即经验平衡常数和标准平衡常数的概念和书面公式表达进行了分析讨论；比较了这两种平衡常数的异同,指出了在无机化学教学中应注意的地方；并对一些模糊的概念进行了修正.     

化学反应平衡常数

“atm”单位的废除，研究化学反应平衡常数，首先要研究K，K与标准态选择有关，教科书中对此并未统一，使学生学习显得混乱。为此，笔者从标准态选择入手，讨论了K与其它实验平衡常数的关系。     

法定计量单位与平衡常数关系式

在使用法定计量单位后，平衡常数关系式依然成立．阐述了其成立条件，提出了使用法定计量单位摩尔气体常数的取值和单位．     

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