硬质合金工具金刚石涂层渗硼预处理

采用固体粉末渗硼工艺,研究了ＹＧ６硬质合金刀片表面渗硼预处理对金刚石涂层的着力的影响。研究结果表明：ＹＧ６硬质合金刀片通过粉末固体渗硼,表面生成具有较好高温稳定性的、以ＣｏＢ为主的渗民支,克服了金刚石沉积中基底表面的钴的不利影响,使得经渗硼处理的ＹＧ６刀片试样金刚石涂层附着力优于浸预处理试样。     

涂层成份及结构的X射线光电子谱分析

以硬质合金作为衬底，分别采用了化学涂层（ＣＶＤ）和物理化学涂层（ＰＣＶＤ）的技术涂复Ｔｉ（Ｃ，Ｎ）－ＴｉＮ硬质膜，应用Ｘ射线光电子谱分析（ＸＰＳ）技术，研究涂层表面化学成分、元素化学状态、物相组成及其随深度的变化。涂层表面由Ｔｉ，Ｎ，Ｃ，Ｏ和Ｃｏ组成；表面物相包括ＴｉＮ，ＴｉＯ＿ｘ及ＣｏＯ．随着深度的增加，Ｔｉ：Ｎ迅速变为１，而ＴｉＯ＿ｘ和ＣｏＯ含量急剧减少．     

混配型杂多酸掺杂聚苯胺的制备与表征

混配型杂多酸掺杂聚苯胺的制备与表征龚剑王东仁瞿伦玉（东北师范大学化学系,长春,１３００２４）本文报道了用化学制备法制得的四种掺杂聚苯胺,经元素分析可知其最简式分别为：（Ｃ６Ｈ４５Ｎ）１２５（Ｈ４ＰＭｏＶＯ４０·５５Ｈ２Ｏ）（Ｓ１）;（Ｃ６Ｈ４...     

金刚石涂层木工刀具的研究

采用热丝加热化学气相沉积法，将金刚石薄膜涂覆硬质合金刀片，在杠杆式磨损实验台进行磨损试验。结果表明，涂层刀片的磨损量降低了６０％，薄膜剥离是造成金刚石涂层没有大幅度提高刀片耐磨性的根本原因。     

苯甲酸衍生物的Tb（Ⅲ）配合物中配体性质对Tb^3＋的超灵敏跃迁？…

测定了６个苯甲酸衍生物ＲＣ６Ｈ４ＣＯ２Ｈ（Ｒ＝ｏ－ＮＨ２、Ｈ、ｐ－ＮＨ２、ｏ－ＯＨ、ｍ－Ｃｌ、ｏ－ＣＯＯＨ）与铽Ｔｂ（Ⅲ）的二元配合物在３５０ｎｍ紫外光激发下的荧光光谱。结果表明,配合物的荧光强弱顺序为Ｒ＝ｏ－ＮＨ２〉Ｈ〉ｐ－ＮＨ２〉ｏ－ＯＨ〉ｍ－Ｃｌ〉ｏ－ＣＯＯＨ。并注意到,标志Ｔｂ＾３＋的超灵敏跃迁强度的量：蓝光（４９１ｎｍ）与绿光（５４５ｎｍ）的相对强度比（ＩＢ／Ｇ）与配体的酸常数ｐＫａ（Ｌ     

在二甲亚砜溶剂中氯化钼氧卟啉和超氧自由基反应动力学研究Ⅱ反应网络

本文研究了Ｍｏ￣ⅤＯ（ＴＰＰ）Ｃｌ与Ｏ＿２的反应机理。结果表明，在１：１体积比ＣＨ＿２Ｃｌ＿２－ＤＭＳＯ溶剂中，在１８－ｃｒｏｗｎ－６存在下，配合物Ｍｏ￣ⅤＯ（ＴＰＰ）Ｃｌ被Ｏ￣－＿２还原的反应通过一系列中间物，最后生成Ｍｏ￣ⅣＯ（ＴＰＰ）（１８－ｃｒｏｗｎ－６），本文给出了详细的反应动力学网络。     

钴原子簇化学研究 Ⅷ.含桥基2-硫代乙内酰脲分子片配位及杂环卡宾的三核钴羰基硫簇合物的合成和结构

用乙酸、硫氰化铵与氨基酸反应，得到４个２－硫代乙内酰脲配体Ｓ＝ＣＮＨＣ（Ｏ）ＣＨ（Ｒ）Ｎ↓Ｈ，它们分别与Ｃｏ２（ＣＯ）８反应，合成出两类４个三核钴羰基硫簇合衍生物：Ｃｏ３（ＣＯ）７（μ３－Ｓ）〔μ－η２－ＳＣ＝ＮＣ（Ｏ）ＣＨ（Ｒ）Ｎ↓Ｈ（Ｉａ，Ｉｂ）和Ｃｏ３（ＣＯ）６（μ３－Ｓ）（μ－η２－ＳＣ＝ＮＣ（Ｏ）ＣＨ（Ｒ）Ｎ↓Ｈ）（：ＣＮＨＣ（Ｏ）ＣＨ（Ｒ）Ｎ↓Ｈ）（Ⅱｃ，Ⅱｄ）．对４个族合物进行了元素分析、ＩＲ谱、１ＨＮＭＲ和ＭＳ表征，并推测出它们的分子结构．     

在非极性溶剂中杂多阴离子—CO络合物的电子光谱

合成了五种取代型杂多化合物：「ＳｉＷ１１Ｏ３９Ｃｏ（Ｈ２Ｏ）」＾６－，「ＧｅＷ１１Ｏ３９Ｃｏ（Ｈ２Ｏ）」＾６－，「ＰＷ１１Ｏ３９Ｃｏ（Ｈ２Ｏ）」＾５－，「Ｐ２Ｗ１７Ｏ６１Ｃｏ（Ｈ２Ｏ）」＾８－，「ＰｗＯ１８Ｏ６８Ｃｏ４（Ｈ２Ｏ）２」＾１０－，通过等离子体、ＩＲ、ＵＶ、极谱、热谱等测试手段对产物进行了表征、并首次报道它们在非极性溶剂中与ＣＯ小分子的作用，实验结果表明，取代型杂多化合物与ＣＯ形成了ＨＰ     

苯甲酸衍生物的Tb(Ⅲ)配合物中配体性质对Tb~(3+)的超灵敏跃迁的影响

测定了６个苯甲酸衍生物ＲＣ６Ｈ４ＣＯ２Ｈ（Ｒ＝ｏ－ＮＨ２、Ｈ、ｐ－ＮＨ２、ｏ－ＯＨ、ｍ－Ｃｌ、ｏ－ＣＯＯＨ）与铽Ｔｂ（Ⅲ）的二元配合物在３５０ｎｍ紫外光激发下的荧光光谱．结果表明，配合物的荧光强弱顺序为Ｒ＝ｏ－ＮＨ２＞Ｈ＞ｐ－ＮＨ２＞ｏ－ＯＨ＞ｍ－Ｃｌ＞ｏ－ＣＯＯＨ并注意到，标志Ｔｂ３＋的超灵敏跃迁强度的量：蓝光（４９１ｎｍ）与绿光（５４５ｎｍ）的相对强度比（ＩＢ／Ｇ）与配体的酸常数ｐＫａ（Ｌ）及配体的平均极化率α（Ｌ）之间有很好的相关性．定量地探讨了其结构与性能的关系，为进一步探索新型绿色发光材料提供了一定的科学依据．     

以β-Co(OH)2为前驱体的锂离子电池正极材料LiCoO2

对ＬｉＣｏＯ２ 的结构与电化学性能进行了研究。采用控制结晶法合成出来的层状结构β－Ｃｏ（ＯＨ）２ 作为前驱体,和ＬｉＯＨ混和煅烧,制备出高活性的具有层状结构的锂离子电池正极材料ＬｉＣｏＯ２。试验中,通过差热 热重法分析了煅烧过程的反应机理; Ｘ 光衍射谱表明制得的ＬｉＣｏＯ２ 为α－ＮａＦｅＯ２ 层状结构的 ＨＴ－ＬｉＣｏＯ２; 扫描电镜照片显示β－Ｃｏ（ＯＨ）２ 是ＬｉＣｏＯ２ 优良的前驱体; 性能测试表明制得的ＬｉＣｏＯ２ 具有良好的电化学性能： 其首次充电容量为１５０．１ ｍ Ａｈ／ｇ, 放电容量为１４３．８ ｍ Ａｈ／ｇ, 充放电效率为９５．８％ 。     

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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