用XPS研究Ti—15Mo合金在盐酸中钝化膜的组成

应用ＸＰＳ和电化学测量技术研究了Ｔｉ－１５Ｍｏ合金在７０℃４ｍｏｌ／Ｌ ＨＣｌ溶液中，９００ｍＶ，２００ｍＶ和０ｍＶ恒电位阳极极化条件下形成的钝化膜。结果表明，Ｔｉ－１５Ｍｏ合金在７０℃４ｍｏｌ／Ｌ ＨＣｌ溶液中钝化膜很稳定。     

镍钨合金电沉积及其析氢电催化性能的研究

本文研究以钛或铁为基体的Ｎｉ－Ｗ合金电镀，阴极极化曲线表明，以Ｔｉ为基体的Ｎｉ－Ｗ合金镀层为阴极，电解３００ｇ／ＬＮａＣｌ（２５℃），３．０Ａ／ｄｍ＾２能降低析氢过电势４２０ｍＶ，电解１ｍｏｌ／Ｌ ＭｎＳＯ４＋０．５ｍｏｌ／ＬＨ２ＳＯ４能降低８１０ｍＶ，说明Ｎｉ－Ｗ镀层是析氢的优良电催化阴极。     

锑在弱碱溶液中阳极成膜规律的研究

利用恒电位阳极极化电流与极化时间的关系、线性电位扫描及Ｘ射线衍射研究了锑在２．５×１０－５ｍｏｌ／ｍ３ＮａＨＣＯ３＋２．５×１０－５ｍｏｌ／ｍ３Ｎａ２ＣＯ３＋５．０×１０－４ｍｏｌ／ｍ３Ｎａ２ＳＯ４溶液中（ｐＨ＝９．１，３０℃）于１．２Ｖ（ＶＳ．ＳＣＥ）阳极成膜３ｈ，阳极成膜规律及膜相组成与结构。实验结果表明，本工作中的阳极膜主要由Ｓｂ２Ｏ３（斜方）晶体构成，成膜规律为锑的溶解与锑氧离子ＳｂＯ＋的生成→锑氧化物膜的形成与增厚→氧化物膜的钝化。     

DMF中Nd—Ni合金膜的制备

研究了室温下在含有少量水的ＮｄＣｌ３－ＮｉＣｌ２－ＤＭＦ溶液中电沉积制备Ｎｄ－Ｎｉ功能合金膜,选定一系列的阴极电位进行恒电位电解,制备出不同Ｎｄ含量的Ｎｄ－Ｎｉ合金膜．ＥＤＡＸ和ＸＲＤ分析表明：在０．１０ｍｏｌ／ｄｍ３ＮｄＣｌ３＋０．１０ｍｏｌ／ｄｍ３ＮｉＣｌ２的ＤＭＦ溶液中,控制电位为－１．７５Ｖ（对ＳＣＥ）进行恒电位电解,可得到有金属光泽、附着力强的银白色Ｎｄ－Ｎｉ合金膜     

在制取电解MnO2（EMD）过程中Ti基合金阳极的钝化研究

用恒电位扫描法（ＬＳＶ）研究了八类Ｔｉ基合金阳极「纯Ｔｉ，Ｔｉ－Ｎｉ，Ｔ－Ｍｎ（涂层），Ｔｉ－Ｍｎ（合金），ｔｉ－Ｃ，Ｔｉ－Ｂ，Ｔｉ－Ｎｉ－Ｍｏ，Ｔｉ－Ｎｉ－Ｍｏ－Ａｒ」分别在４０％Ｈ２ＳＯ４（ａｑ）及ＩＭＭｎＳＯ４（ａｑ）中的能钝化行为，得到１６组数据，从实验结果阐明了ＥＭＤ工业中所用纯Ｔｉ阳极钝化现象的机理及Ｔｉ基金阳极优于纯Ｔｉ阳极的依据。     

锑在硼砂溶液中阳极成极膜规律的研究（Ⅱ）

本文利用线性电位扫描，ｘ射线衍射和恒电位阳极极化电流与时间的关系研究了锑在０．０５ｍｏｌ·ｄｍ－３Ｎａ２Ｂ４Ｏ７＋０．５ｍｏｌ·ｄｍ（－３）Ｎａ２ＳＯ＿４溶液中（ＰＨ＝９．１，３０℃）于１．２Ｖ（ＶＳ．ＳＣＥ）阳极成膜３ｈ，阳极形成膜相组成及其生长规律。实验结果表明，本工作中的阳极膜主要组成是Ｓｂ＿２Ｏ＿３和ＳｂＯＨＳＯ＿４·Ｈ＿２Ｏ，膜生长规律大致包括金属的溶解→氧化物膜的形成与增厚→膜的钝化。     

锑在硼砂溶液中阳极极化膜半导体性质的研究（续）

本工作利用白光电流和交流阻抗法研究了锑在０．０５ｎ１Ｏｌ·ｄｍ￣（－３）Ｎａ＿２Ｂ＿４Ｏ＿７＋、０．５ｍｏｌ·ｄｍ“Ｎａ２Ｓｏ４溶液中（ＰＨ一９．ｌ，３０Ｃ）于１．２ｖ（ｖＳ。ＳＣＥ）阳极形成膜的半导体性质。实验结果表明，该阳极膜是一种ｎ型半导体，其平带电位为一０．３６Ｖ，施主密度为２．８×ｌ０￣１８ｃｍ￣（－３）。讨论了锑增加对在硫酚溶液中形成的阳极ｐｂ（Ⅱ）氧化物膜生长的影响。     

邻苯二胺活性膜的电化学聚合

采用循环伏安法制备了邻苯二胺电聚合膜。研究了聚邻苯二胺（ＯＤＢ）合成过程中单体浓度、扫描速率、溶液中氢离子浓度、电极材料、阴离子种类、聚合时间等对聚合电量的影响,提出了最佳聚合方案,即在０．０１５ｍｏｌ／ＬＯＤＢ＋０．４ｍｏｌ／ＬＫＣｌ＋０．１ｍｏｌ／ＬＨＣｌ溶液中,以１００ｍＶ·ｓ－１的速率循环扫描５０ｍｉｎ。根据红外光谱初步推测：单体浓度低时可聚合形成类似吩嗪的桥式化学结构;而浓度高时形成１,２,４取代的链式结构。     

砷钼杂多阴离子薄膜修饰电极的电化学特性及？…

用电化学沉积法制备了Ａｓ－Ｍｏ杂多阴离子修电极，在０．３ｍｏｌ／Ｌ Ｈ２ＳＯ４溶液中及０．７０Ｖ～０．００Ｖ电位范围内，该电极具有三对可逆氧化还原表面波，它们分别对应于Ａｓ－Ｍｏ杂多阴离子中Ｍｏ的三个２电子氧化还原过程，这三对表面波分别对ＮＯ２＾－ＩＯ３＾－及ＡｓＭｏ１２Ｏ＾３４０离子具有电催化活性，文中给出了其催化机理及浓度响应范围。     

钕离子对镍电沉积层择优取向及其性能的影响

对１．０ｍｏｌ／ＬＮｉＳＯ４，０．５ｍｏｌ／ＬＨ３ＢＯ３，１．１×１０－３ｍｏｌ／ＬＮｄＣｌ３体系，在宽电位范围内，控制电位沉积可得到高择优取向镍沉积层，控制电位为－１．２５Ｖ，沉积９０ｍｉｎ，得到高择优取向（２２０）镍沉积层，对该镍沉积层的织构度采用Ｘ射线衍射进行测定，其织构度ＴＣ２２０为９４％，测定了高择优取向（２２０）镍沉积层在１ｍｏｌ／ＬＮａＯＨ溶液中的析氢电催化性能，与多晶镍电极相比具有良好的电催化活性，使析氢过电位降低，交换电流密度提高．     

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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