粘度法测试PPTA／尼龙—1010分子复合材料组合间相容性

采用粘度法测得了ＰＰＴＡ／尼龙－１０１分子复合体系在硫酸溶液中的粘度数据，作出了ηｓｐ－ｃ、「η」－Ｘｐ及α－Ｘｐ的关系曲线，显示ηｓｐ－ｃ与「η」－Ｘｐ关系曲线都呈直线，α－Ｘｐ的关系曲线中，α〉０，表明ＰＰＴＡ和尼龙－１０１０在复合体系中是相容的，且在ＰＰＴＡ含量为１０％左右，α值最大，表明其相容性最好。并从分子链结构方面对组间相容性进行了探讨。     

FeO-SiO_2-CaO-MgO系高镁炉渣粘度的测定

测定了合成的不同成份的FeO－CaO－MgO系炉渣的粘度，得知：在炉渣中，当mFe／mso2为1.2～1.5，ωMgO为6％～9％，ωFe3O4为3％～4％，ωCaO为0～9％，温度范围为1250～1450℃时，炉渣粘度随ωFe／ωSiO2和ωCaO的升高而降低，随着ωMgO的升高而增大；在1350℃以上时，上述变化关系则不明显．对于闪速炼镍所采用的FeO－SiO2－CaO－MgO系炉渣，在一般的冶炼操作温度（1300～1350℃）下，当渣中ωMgO高达6％～8％时，仍可获得流动性能良好的渣；当ωMgO在9％以上时，则渣的粘度迅速上升以致不适合于冶炼．同时，在炉渣总量不变的情况下，在一定的范围内通过减少SiO2的加入量和补加CaO含量可使炉渣粘度得到改善．     

热浸Zn－Ni合金镀液中锌渣的研究

本文研究了在Ｚｎ－０．１％Ｎｉ合金锭液中形成的渣的成分、相结构、形成机制以及影响成渣的两个因素．结果表明，这种渣是由单斜晶系的Ｆｅ（Ｎｉ）－Ｚｎ１３ζ合金相和纯Ｚｎ的η基体相组成的混合物，其形成机制与纯Ｚｎ镀液中渣的形成机制基本相同，即工件及钢质锌锅与镀液反应形成二元系（Ｆｅ－Ｚｎ）相（ζ相），部分剥落进入镀液中，并且其中的Ｆｅ原子被Ｎｉ原子部分取代之后形成三元系的Ｆｅ－Ｎｉ－Ｚｎ合金渣．结果还表明，向Ｚｎ－Ｎｉ合金镀液中加入少于０．２％Ａｌ及低温镀锌均有利于减少渣的形成．     

高韧性耐磨钢（W2）的研制

良好的耐磨性能与韧性通常很难兼之，采用高合金风生产成本较高，W2钢则两种特性兼优，且合金成份成本较低，采用合理的化学成分，冶炼工艺，锻造方法和热处理条件，得到了洛氏硬度60．2，冲击韧性σk115J/cm^2的W2钢，其合金元素总量（W＋Mo V Cr)为M2高速工具钢的40％左右，洛氏硬度和耐磨性能达到M2水平，冲击韧性σk则比M2高1．5倍，W2钢性能亦优于日本新研制开发的ES钢，其吨钢生产成本约为M2钢的35％－40％左右。     

用高炉钛渣冶炼钛硅合金的研究

介绍了用直流电热法从攀钢高炉钛渣中冶炼钛硅合金的工艺。研究了电硅热法冶炼钛硅合金时渣中ＴｉＯ２的还原贫化规律和直流电对钛硅合金冶炼的作用，用直流电硅热法可生产含Ｔｉ２０％左右的钛硅合金，钛回收率小于６０％．开发了直流电硅铝热法生产钛硅合金工艺，采用直流电硅铝热法可生产含Ｔｉ＞３０％、Ｓｉ＜３５％的钛硅合金，钛回收率大于８０％，铁硅合金可部分取代钛铁用于炼钢，还原残渣可用于制水泥。     

粘度法测试PPTA/尼龙-1010分子复合材料组分间相容性

采用粘度法测得了ＰＰＴＡ／ 尼龙－ １０１０ 分子复合体系在硫酸溶液中的粘度数据,作出了ηｓｐ ～ｃ′、［η］ ～Ｘｐ 及α～Ｘｐ 的关系曲线,显示ηｓｐ ～ｃ′与［η］ ～Ｘｐ 关系曲线都呈直线,α～Ｘｐ的关系曲线中,α＞ ０ ,表明ＰＰＴＡ 和尼龙－ １０１０ 在复合体系中是相容的,且在ＰＰＴＡ 含量为１０ ％ 左右,α值最大,表明其相容性最好。并从分子链结构方面,对组分间相容性进行了探讨。     

利用硫酸渣生产铁精矿的研究

通过对硫酸渣的物质组成和矿物特性的研究，提出了一种联合工艺处理硫酸渣，可获得合格的炼铁原料．试验结果表明，硫酸渣铁含量51．56％，含硫1.36％的情况下，采用酸浸洗、磁选、水力旋流器分级工艺流程，可获得轶含量60．66％，含硫0．2％左右的铁精矿，金属回收率为43．6％．     

丙烯酸系反相乳液共聚合反应的研究

丙烯酸系共聚物具有广泛的用途，采用反相乳液聚合的方法对其进行了合成规律的研究。在以Ｓｐａｎ－Ｔｗｅｅｎ类或Ｓｐａｎ－ＯＰ类为乳化剂，脂肪烃为油相介质，在用氧化还原引发剂的条件下，研究了聚合反应温度、反应时间、水相ｐＨ值、单体浓度、油水比、共聚单体配比、交联剂用量对聚合反应及产物性能的影响，得到了质量分数ｗ为２％水溶液的粘度η达２０ＰａＳ以上的增稠产物。     

炉渣物理性质对电渣重熔过程电耗的影响

以高氟化钙渣 ANF-6 和无氟化钙渣 A_1 为例,研究了它们比电导、导热系数、粘度对电渣重熔过程电耗的影响。研究表明:在1500～1900℃时 ANF-6 渣比电导比 A_1 渣高3～10倍;A_1 渣的电效率比 ANF-6 渣提高 10.2％;A_1 渣的总热阻值比 ANF-6 渣大1倍,可减少热损失,提高热效率;在 1600℃下 ANF-6 渣粘度值比 A_1 渣小 10倍左右,渣粘度大传热慢,可提高热效率。可见,低比电导、低导热系数、高粘度渣有利于提高电效率,降低电耗。     

湘钢高Al2O3高炉渣粘度研究

对湘钢高AlO3高炉渣的粘度进行了测试。通过改变二元碱度R和MgO的含量，探讨在高Al2O3情况下高炉渣的最优配比。实验表明，在高Al2O3下，保持高MgO，较低碱度是可行的。实验中，R=0．95，WMgO=12％的炉渣流动性最好。     

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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