Ni—P—MoS2复合镀层的摩擦学行为

研究了以Ｎｉ－Ｐ为基质，ＭｏＳ２为分散剂的Ｎｉ－Ｐ－ＭｏＳ２自润滑复合镀层的摩擦学行为。研究结果表明，Ｎｉ－Ｐ－ＭｏＳ２复合镀层有较优异的减摩性能，ＭｏＳ２颗粒的含量及镀时对其减摩性有很大的影响。     

电沉积Fe－Ni－MoS_2复合镀层及摩擦磨损性能的研究

对Ｆｅ－Ｎｉ－ＭｏＳ２复合镀层的制备工艺及其摩擦磨损性能进行了试验研究。结果表明，依靠传统的电镀工艺，悬浮在酸性电解液中的ＭｏＳ２微粒能与Ｆｅ、Ｎｉ共沉积形成Ｆｅ－Ｎｉ－ＭｏＳ２自润滑复合镀层。通过正交试验，确定了制备复合镀层的最佳工艺参数，并与４５＃淬火钢和球墨铸铁等材料相比，Ｆｅ－Ｎｉ－ＭｏＳ２自润滑复合镀层具有良好的耐磨性和减摩性。     

Ni基与Ni-P基含MoS_2复会电刷镀层的减摩特性

在“球－盘”试验机上对Ｎｉ／ＭｏＳ２与 Ｎｉ－Ｐ／ＭｏＳ２两种复合镀层的摩擦磨损性能进行全面的测试与比较，并对其作用机理进行了分析。试验结果表明，两种复合镀层在油润滑条件下的摩擦系数，一般均可达到 ０．０５～０．０６的水平，而 Ｎｉ－Ｐ／ＭｏＳ２的承载能力或磨损寿命要比 Ｎｉ／ＭｏＳ２提高 ４～６倍以上。     

电沉积Fe—Ni—MoS2复合镀层及摩擦磨损性能的研究

对Ｆｅ－Ｎｉ－ＭｏＳ２复合镀层的制备工艺及其摩擦磨损性能进行了试验研究。结果表明，依靠传统的电镀工艺，悬浮在酸性电解液中的ＭｏＳ２微粒能与Ｆｅ，Ｎｉ共沉积形成Ｆｅ－Ｎｉ－ＭｏＳ２自润滑复合镀层，通过正交试验，确定了制备复合镀层的最佳工艺参数，并与４５＾＃淬火钢和球墨铸铁等材料相比，Ｆｅ－Ｎｉ－ＭｏＳ２自润滑复合镀层具有良好的耐磨性和减磨性。     

新型Ni－Cu－P／MoS_2固体润滑镀层优化试验研究

研制出一种新型Ｎｉ－Ｃｕ－Ｐ／ＭｏＳ２电刷镀固体润滑复合镀层。对影响镀层耐磨性的因素进行了正交设计;包括镀液中铜盐、次亚磷酸盐、二硫化钼及刷镀电压。对得到的９种镀层,进行了摩擦磨损试验,测量其磨损量及摩擦系数,最终优化出最佳的Ｎｉ－Ｃｕ－Ｐ／ＭｏＳ２镀层及相应的镀液。还对镀层的相结构及成分进行了测试,讨论了它们对镀层耐磨性的影响。结果表明,镀层中一定量的铜及亚稳间隙相对改善镀层的耐磨性及减磨性具有重要作用。     

电刷镀耐磨减摩复合镀层研究

采用电刷镀技术制备的Ｎｉ－Ｃｏ－ＺｒＯ２复合镀层具有耐磨损，抗高温氧化及镀层光亮致密的特点，Ｎｉ－Ｃｏ－ＭｏＳ２，Ｎｉ－Ｃｏ－石墨及Ｎｉ－Ｃｏ－ＰＴＦＥ复合镀层具有摩擦系数小，镀层致密光滑以及与其体金属结合强度高的特点，初步分析了复合镀层的组织结构及其形貌特征。     

电刷镀Ni-MOS_2固体润滑镀层的微观结构

具有六方晶体结构的ＭｏＳ２，在各种固体润滑涂层中能否充分发挥其减摩作用，在很大程度上决定于 ＭｏＳ２在涂层中的位向。文中对镀层的微观结构及晶粒取向进行了深入的透射电镜（ＴＥＭ）及Ｘ射线衍射分析，证明镀层中的ＭｏＳ２晶粒，绝大多数都以其（０００１）基面平行于镀层表面．显示了明显的择优取向特点。此外还结合镀层的微观结构分析．对Ｎｉ与ＭｏＳ２两相的共沉积过程进行了讨论。     

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．     

刷镀Ni－SiC－WC－MoS_2复合镀层钢领的纺纱性能

探索钢领表面处理新技术．选用复合刷镀技术处理钢领内跑道表面，研究复合刷镀钢领的纺纱性能．结果表明，复合刷镀Ｎｉ－ＳｉＣ－ＷＣ－ＭｏＳ２处理后的钢领具有较优的纺纱性能．     

ABS表面化学镀Cu／Ni－P的电磁屏蔽功能

在ＡＢＳ塑料表面以化学镀沉积ＣＵ／Ｎｉ－Ｐ双镀层，并探讨其与基体的结合强度、环境稳定性、导电性及电磁屏蔽性能；以ＳＥＭ观察了镀层的微结构及表观形貌．研究结果表明，ＡＢＳ／Ｃｕ／Ｎｉ－Ｐ材料具有较高的电磁屏蔽效率，且经久耐用．     

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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