非晶态Ni—P合金与TiC微粒复合镀的研究

利用复合电镀技术，制备了非晶态Ｎｉ－Ｐ合金基ＴｉＣ复合镀层，测定了非晶态Ｎｉ－Ｐ合金镀层和（Ｎｉ－Ｐ）－ＴｉＣ复合镀层的表面形貌、结构、硬度以及耐磨性。研究了ＴｉＣ微粒对镀层的弥散强化作用，与非晶态Ｎｉ－Ｐ合金镀层相比，（Ｎｉ－Ｐ）－ＴｉＣ复合镀层的硬度和耐磨性均超过了非晶态Ｎｉ－Ｐ合金镀层。     

非晶态Ni－P合金与TiC微粒复合镀的研究

利用复合电镀技术，制备了非晶态Ｎｉ－Ｐ合金基ＴｉＣ复合镀层．测定了非晶态Ｎｉ－Ｐ合金镀层和（Ｎｉ－Ｐ）－ＴｉＣ复合镀层的表面形貌、结构、硬度以及耐磨性．研究了ＴｉＣ微粒对镀层的弥散强化作用．结果表明，与非晶态Ｎｉ－Ｐ合金镀层相比，（Ｎｉ－Ｐ）－ＴｉＣ复合镀层的硬度和耐磨性均超过了非晶态Ｎｉ－Ｐ合金镀层．     

Ti－Code12合金焊后退火对组织性能的影响

研究了Ｔｉ－Ｃｏｄｅ１２合金（Ｔｉ－０．３Ｍｏ－０．８Ｎｉ）焊后退火对组织和性能的影响．结果表明焊后退火将引起残存β相的共析分解，共析分解产物Ｔｉ２Ｎｉ相具有面心立方结构．合金的耐蚀性来源于α基体上Ｔｉ２Ｎｉ相的存在，Ｔｉ２Ｎｉ相既可在晶间沉淀，也能在晶内沉淀．本研究对Ｔｉ－Ｃｏｄｅ１２合金耐蚀性机理提出了直接证据．     

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。     

（TiO2—Al—C）—（Ti—C—Ni）复合体系的自蔓燃热力学分析

研究了Ｔｉ－Ｃ－Ｎｉ系添加剂对（ＴｉＯ２－Ａｌ－Ｃ）－（Ｔｉ－Ｃ－Ｎｉ）复合体系化学反应热力学特性的影响。结果表明，单位质量热效应ΔＨ＾０与Ｔｉ－Ｃ－Ｎｉ系在复合体系中所占质量比ｋ之间存在着严格的线性关系，其斜率仅由Ｎｉ在Ｔｉ－Ｃ－Ｎｉ系中所占质量比γ决定，而截距为一常数，等于ＴｉＯ２－Ａｌ－Ｃ单位质量热效应。     

Cu-Ni-Al-Ti合金的时效特性

通过电阻率、应力松驰性能和硬度的测定以及差热分析方法，研究了Ｃｕ－Ｎｉ－Ａｌ－Ｔｉ合金的时效特性。结果表明：该合金时效动力学符合Ａｖｒａｍｉ方程，其ｌｎｌｎ１／（１─Ｘ）与ｌｎｔ之间的关系，可用两条不同斜率的直线段来描述，５５０℃时效时两直线交于ｌｎｔ＝６．４处，相应于时效时间１０ｍｉｎ，时效初期相变速率极高，随后逐渐降低；连续加热时，较低温度下形成的富溶质原子区在８００～９００℃区间可能重溶，γ相［Ｎｉ＿３（Ａｌ，Ｔｉ）］在高温下形成，并且可能向热力学更稳定的状态转化；除形成γ相外，还可能形成其它化合物；Ｃｕ－Ｎｉ－Ａｌ－Ｔｉ合金时效稳定性极高，过时效倾向很小。     

商业Inconel718合金晶界析出相的鉴别

在商业Ｉｎｃｏｎｅｌ７１８合金中存在３种成分非常接近的析出相：δ－Ｎｉ３Ｎｂ（Ｔｉ，Ａｌ），γ″－Ｎｉ３Ｎｂ（Ｔｉ，Ａｌ）和γ″－Ｎｉ３Ａｌ（Ｔｉ，Ｎｂ），而且在标准热处理状态下，析出相很小，即使运用ＥＤＡＸ微区成分分析方法也难以区分，尽管３种析出相结构不同，但γ″相的３种变体和δ相的１２种变体导致两者众多衍射斑点的重合，增加了实验鉴别的困难。     

（TiO_2－Al－C）－（Ti－C－Ni）复合体系的自蔓燃热力学分析

研究了Ｔｉ－Ｃ－Ｎｉ系添加剂对（ＴｉＯ２－Ａｌ－Ｃ）－（Ｔｉ－Ｃ－Ｎｉ）复合体系化学反应热力学特性的影响。结果表明，单位质量热效应△Ｈ与Ｔｉ－Ｃ－Ｎｉ系在复合体系中所占质量比ｋ之间存在着严格的线性关系，其斜率仅由Ｎｉ在Ｔｉ－Ｃ－Ｎｉ系中所占质量比γ决定，而截距为一常数，等于ＴｉＯ２－Ａｌ－Ｃ单位质量热效应。当γ＜γ０＝４５．７９％时，Ｔｉ－Ｃ－Ｎｉ可提高其绝热燃烧温度。当γ＝０．１时，复合体系绝热燃烧温度基本上随添加量ｋ增加而呈线性增加。     

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。     

快速凝固Cu－Zn－Al－Mn－Ni－Ti合金的显微组织

快速凝固Ｃｕ－Ｚｎ－Ａｌ－Ｍｎ－Ｎｉ－Ｔｉ合金的显微组织常凤莲，苏华钦王世栋，张谨平，梅建平（东南大学机械工程系，南京２１００１８）（东南大学分析测试中心，南京２１００１８）晶粒细化是目前Ｃｕ基记忆合金研究焦点之一。快速凝固技术应用于制备Ｃｕ基记忆合...     

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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