移动化学反应界面实验装置的改进

针对移动化学反应界面实验的4个难以解决的关键问题,在W.K.Chen实验装置的基础上,设计了一种新的多移动化学反应界面实验装置,在对CoCl2与NaOH形成的移动化学反应界面进行实验对比的同时,对KCl KBr与AgNO3形成的多移动化学反应界面进行了实验研究.结果表明,该装置能很好地避免电解时产生的H 、OH-的干扰,反应界面清晰,实验精度较高,能节省大量的阴、阳极液,稳定性好.     

强碱和弱碱在形成移动中和反应界面中的差异

弱碱及强碱均可与强酸在一定的条件下形成移动中和化学反应界面(Moving Neutrilization Chemical ReactionBoundary,MCRB) .从理论上说, 其界面移动速度因为它们的电离度不同而存在差异. 实验表明,这种差异是存在的, 且实验的结果与移动化学反应界面速度的理论计算值相吻合.     

强反应电解质形成的移动化学反应界面：实验分析

将移动化学反应界面的实验（引自Ｊ．Ｐｈｙｓ．Ｃｈｅｍ．１９７０，７４：１１２２．Ａｎａｌ Ｃｈｅｍ１９０；４２：３２１和Ｊ．Ｃｈｒｏｍａｔｏｇｒ．１９９３，６８３：１７９）与移动化学反应界面理论的预测作了对比性研究。结果表明：实验结果与理论的预测吻合．因此，实验验证了理论的有效性。     

多对强与弱反应电解质形成的多移动化学反应界面

由多对强、弱反应电解质形成的多移动化学反应界面（MMCRB）模型，可推导出一系列的多移动化学反应界面方程（MMCRBE：s），结果显示：移动化学反应界面（MCRB）模型不同于MMCRB模型，MCRBE:s只是MMCRBE：的一个特列。因此，MMCRBE：s是对MCRB理论的推广，这为研究及设计新的分离技术、研究新的测定反应离子迁移数和淌度的方法、研究“等电聚焦电泳（IEF）”机制等方面提供了理论依据。     

由Co^2＋和OH^—形成的移动化学反应界面实验的报道

进行了由Ｃｏ＾２＋和ＯＨ＾－形成的“移动化学反应界面”的实验。实验中，观察了界面移动速度（μｔｈｅ＾αβ）对比。通过改变Ｃｏ＾２＋和ＯＨ＾－的浓度和反应管中电场强度等参数，总共完成了２６次实验。统计分析表明：μｏｂｓ＾αβ和μｔｈｅ＾αβ的相关系数是０．９９７，μｔｈｅ＾αβ和μｏｂｓ＾αβ之间的线性回归方程是μｔｈｅ＾αβ＝１．０４４μｏｂｓ＾αβ＋０．１３６。结果显示：实验观察的界面移动速度（     

强酸强碱形成的移动中和反应界面的实验研究

介绍一种用于等电聚焦电泳( IEF) 以及移动中和化学反应界面(MCRB)的实验方法, 并优化实验方法和条件.利用优化的方法和实验条件,完成了由强电解质盐酸和氢氧化钠形成的MNRB 实验. 实验结果与 MCRB 理论定量吻合. 这一实验方法对于 IEF 和MNRB 的研究具有重要的意义.     

印度尼西亚海砂氧化性球团氢气还原机理

对印度尼西亚海砂矿氧化性球团氢气还原的规律做了较详细的研究。实验采用失重的方法,通过对反应过程的物相变化、热力学以及动力学方面的分析,探究了海砂球团矿氢气还原的机理。结果表明：温度在800℃和850℃,还原反应的最终产物主要是FeTiO3,整个反应限制环节是由两个不同阶段的过程组成,反应开始阶段由界面化学反应控制,之后由界面化学反应与内扩散共同控制；在900、950和1000℃三个温度下,反应产物中有钛氧化物出现,整个还原反应由三个不同的限制性环节组成,开始由界面化学反应控制,反应中间阶段是由界面化学反应和内扩散共同控制,反应后期则是由内扩散控制为主。     

广义Cholesky分解的扰动界

本文主要讨论了广义Cholesky分解的扰动问题,对于K和K+E是对称不定矩阵,假设K=LJLT和K+E=(L+G)J(L+G)T是广义Cholesky分解.我们给出了‖G‖/‖L‖的上界和下界‖G‖F/‖L‖2≤√2a‖E‖F/1+√1-2a‖E‖F,‖G‖F/‖L‖F≥‖E‖F/β/1+√1+‖E‖F/β.其中,a=‖L-1‖F‖L-T‖F,β=‖L‖F‖LT‖F.对任意的矩阵A=(aij),我们定义dA=(daij),则有‖dK‖F/2β≤‖dL‖F/‖L‖F,‖dL‖F/‖L‖2≤a/√2‖dK‖F.     

硅烷偶联剂在玻纤增强塑料界面上的增强机理

本文应用紫外光谱仪和硅胶薄层层析法研究玻纤增强塑料(FRP)中硅烷偶联剂与玻纤表面所形成的界面层及其增强机理。观察到界面层中包含着物理吸附层和化学偶联层,前者对FRP的增强效果不明显,而化学偶联层才是增强的关键层。并且化学偶联层的分子结构对FRP的增强也密切有关,当偶联层分子参与树脂固化能与树脂大分子发生化学反应时,其增强效果显著。反之,增强效果就差。化学偶联层能否与树脂起化学反应,可凭藉硅胶层析板上树脂展开时的滞留因子R_f值进行预测。当R_f=0,则表征树脂与化学偶联层发生反应而被固定于硅胶层上,不能再行展开移动。反之,只要R_f>0就说明树脂未与化学偶联层发生化学反应。     

准Hilbert C*-模上的范数等式

目的为了研究‖x+y‖=‖x‖+‖y‖和毕达哥拉斯等式在准HilbertC*-模中成立的充要条件。方法采用了算子论方法进行研究。结果证明了‖x+y‖=‖x‖+‖y‖成立当且仅当存在A上的态使得(〈‖y‖x-‖x‖y,‖y‖x-‖x‖y〉)=0且(〈x,x〉)=‖x‖2或(〈y,y〉)=‖y‖2成立。也给出了准HilbertC*-模中毕达哥拉斯等式成立的充要条件。结论本文的结果对研究准HilbertC*-模中的范数等式非常有用。     

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.     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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