用光偏转方法对金属激光烧蚀阈值的研究

实验研究光偏转检测原理和实验装置，并用此装置测得黄铜，铝，４５号钢的激光烧蚀阈值分别为０．０１８５ＧＷ／ｃｍ＾２，０．０１３３ＧＷ／ｃｍ＾２，０．０１９５ＧＷ／ｃｍ＾２。     

锇—钼酸盐—碱性染料显色反应的研究

在聚乙烯醇存在下，锇与钼酸铵和碱性染料罗丹明Ｂ，丁基罗丹明Ｂ，耐尔蓝形成离子缔合物，不同碱性染料所形成的缔合物服从比耳定律的浓度范围和摩尔吸光系分别是：０－１．２μｇ／２５ｍｌ和ε５７０ｎｍ＝２．６２×１０＾６Ｌ．ｍｏｌ＾－１ｃｍ＾－１；０－１．０μｇ／２５ｍｌ和ε５７０ｎｍ＝２．８６×１０＾６Ｌ．ｃｍ＾－１；０－１．８μｇ／２５ｍｌ和ε５８５ｎｍ＝２．８１×１０＾６Ｌ．ｃｍ＾－１；０－１．８μｇ     

板式塔吸收实验设计及性能测试

阐述了板式塔吸收实验的设计安装,并确定全塔正常操作范围。实验结果表明,本实验的最佳液体流量为１．１７＊１０＾－５ｍ＾３／ｈ最佳空气流量范围是３５３－４８８ｍ＾３／ｈ;氨水浓度范围为０．０７６－０．１２ｍｏｌ／Ｌ;盐酸浓度范围为０．００８－０．０１２ｍｏｌ／Ｌ。     

用G—L理论计算磁在Josephson隧道结中的穿透深度

该文用Ｇ－Ｌ理论计算得出磁场在Ｊｐｓｅｐｈｓｏｎ隧道结中的穿透深度值为λｊ＝」ｍｃ＾２／８πｅ＾２ ξ＾２００．７４＾２／ρ０ｃｏｓ（γ２－γ１）／２Ｔｃ／（ｄ＾２－ｘ＾２）（Ｔｃ－Ｔ０」＾１／２这一结果表明λｊ与空间位置Ｘ有关。     

一类具有二阶细焦点的二次系统

对如下一类具有二阶细焦点的二次系统进行了研究， ｄｘ／ｄｔ＝－６＋ａｘ＾２， ｄｙ／ｄｔ＝ｘ＋ｌｘ＾２＋ｍｘｙ＋ｎｙ＾２，其中ｗ１＝－２ａｌ－ｍ（ｌ＋ｎ）＝０，ｗ２＝ａ（２ａ＋ｍ）（３ａ－ｍ０［ｎ（ｌ＋ｎ）＾２－ａ＾２（ａｌ＋ｎ）］≠０。证明了当－１＜ｌ／ｎ≤时，系统（１）在０外围     

聚（N—甲基）苯胺作为蓄电池阴极活性材料的电化学性能研究

聚（Ｎ－甲基）苯胺作为一种新的二次电池阴极材料在酸性溶液中有很高的稳定性,由聚（Ｎ－甲基）苯胺膜电极Ｚｎ片,１．０ｍｏｌ／Ｌ,ＺｎＣｌ２水溶液（ｐＨ＝２．０１）构成的电池,其开路电压的１．３１Ｖ,在恒电流放电速率为０．１５ｍＡ／ｃｍ＾２（放电电压为０．９Ｖ,聚合物重量为２．０ｍｇ／ｃｍ＾２）聚（Ｎ－甲基）苯胺的容量密度和能量密度分别为９７．５Ａｈ／ｋｇ,９４．６Ｗｈ／ｋｇ,在上述充放电电流密度下,     

螺旋吸气式增氧机的结构设计

根据旋转体在水中高速旋转时形成的负压，吸入空气，在涡流剪切力作用下，产生微小气泡，组成气水混合体的原理，选型设计了螺旋吸气式增氧机。其主要结构由螺旋器，扩散器，空心轴，电动机等部件组成。其设计技术参数为：增氧动力效率０．６１ｋｇ／ｋｗ．ｈ；混合速度７００ｍ＾２ｍ／ｋｗ．ｈ；吸气量３０ｍ＾３／ｈ；工作噪音６０ｄＢ；电机功率０．７５－２．２ｋｗ；单机负荷水面５３０－１６６６．７ｍ＾２。经生产单位试用，     

铜与丙酮醛双（N,N‘—二丁基）缩氨基硫脲显色反应的研究

在ｐＨ＝５－１２的乙醇水溶液中,Ｃｕ６２＋与丙酮醛双,Ｎ．Ｎ‘－缩氨基硫脲可形成１：１型络合物,其λｍａｘ＝４８８ｎｍ,ε４８８＝１．０９×１０＾４Ｌ．ｍｏｌ＾－１．Ｃｕ＾２＋浓度在０－５．０ｍｇ／Ｌ内服从比耳定律;若用氯仿萃取后测定,其ε４８８＝１．７７×１０＾５Ｌ．ｍｏｌ＾－１ｃｍ＾－２,Ｃｕ＾２＋浓度在０－０．５０ｍｇ／Ｌ内服从比耳定律。     

Mo离子注入硅和快速退火硅化钼的形成

用大束流密度的钼金属离子注入硅，由于原子间激烈碰撞和硅片的温升而得到了性能良好的硅化钼。实验中发现，当注量均为５×１０＾１７ｃｍ＾－２时，随束流密度的增加，硅化钼生长，其电阻率明显下降，当束流密度为０．５０Ａ．ｍ＾－２时，方块电阻Ｒ口最小，其值为９０Ω。Ｘ衍射分析表明，当束流密度为０．２５Ａ．ｍ＾－２时，硅化钼衍射峰很小，难于辨认，当用０．５０Ａ．ｍ＾－２注入时，３种结构的硅化钼明显出现，对０．２     

Pb—Ag—Ca新型阳有在MnSO4—H2SO4溶液中腐蚀速度的测定

分别测定了ＰＡＣ电极（Ｐｂ－Ａｇ－Ｃａ新型阳极的简称）在ＭｎＳＯ４－Ｈ２ＳＯ４溶液中的阴极极化曲线及阳极极 线，从图中求得：ｉｃｏｒ＝１５．８５μＡ／ｃｍ＾２，ψωｒ＝－０．０９５Ｖ，Ｖｃｏｒ＝２．９５Ｋｇ／ｍ＾２ａｎｎ．７．９０％（电极重量每年消耗的百分数）ｉ。（２）＝５４．７０μＡ／ｃｍ＾２及ｉ。（３）＝１．１０μＡ／ｃｍ＾２；讨论了ＰＡＣ阳极的腐蚀机理即反应（２）受反应（３）的动力学参数所     

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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