镁合金材料的研究进展与发展趋势

比较系统地综述了镁合金材料的研究开发概况、熔炼技术与铸造成型技术，分析了几种新型镁合金材料存在的主要问题，并指出了超塑性镁基合金、镁基大块非晶、镁基复合材料以及镁基贮氢材料是开发镁合金材料潜在性能的发展趋势。     

对皮江法炼镁升温过程的数值模拟

采用函数解析法和数值法对皮江法炼镁还原阶段球团的升温过程进行数值模拟,通过对模拟结果比较分析,总结出数值法较适合对皮江法炼镁瞬态热分析的模拟,从模拟结果中进一步总结归纳皮江法炼镁存在的缺陷,为今后的镁产业研究指明方向。     

镁基脱硫剂与铁水炉外脱硫

介绍几种镁基脱硫剂的制务圾镁基脱硫技术的与应用现状，期望有助于我国镁基脱硫技术的提高。     

红外测温技术在绝缘子检测中的应用

本文简单论述了红外测温技术在检测线路绝缘子缺陷方面的应用，重点分析了红外测温技术检测绝缘子存在缺陷的原理，以及简单归纳了实际工作中应用红外测温技术判断绝缘子是否存在缺陷的方法。     

LiNbO_3的抗光折变与它的OH~－谱研究

测试了不同掺杂，不同组分ＬｉＮｂＯ＿３样品的红外吸收谱．提出在一致熔化组分ＬｉＮｂＯ＿３晶体中，Ｎｂ可变价和Ｌｉ的空位模型。解释了ＯＨˉ谱的３峰结构。在掺镁阈值以上，用镁占铌位和铁占铌位的缺陷模型，解释了ＯＨˉ谱紫移及３５０４ｃｍ￣（－１）峰出现的原由，进而对镁占铌位和铁占铌位进行了肯定。     

实用给水管网检漏技术研究

过去的检漏技术主要是依靠人的漏水听音经验。由于其技术的局限性，已经无法满足目前对管道检漏技术的需求。近年来，开发了以仪器探测为核心的漏水探测技术，已成功地运用到多个自来水公司的检漏工程中并取得了良好的效果。文章主要在分析过去管网检漏技术存在缺陷的基础上，介绍和推荐了新的管网检漏技术，以期推动我国管网检漏技术的发展。     

农村正规金融供给缺陷分析

对我国现阶段农村的正规金融供给进行分析，发现我国农村正规金融供给存在明显的缺陷，主要表现：在农村正规金融称为县域资金外流主渠道，为农村中小企业服务的正规金融企业缺位，县域经济融资渠道单一，农村正规金融市场垄断且低效率。此外，本文进一步分析了农村金融供给存在缺陷的原因，并给出了相应的政策建议。     

“生物毒素检测技术研究”科研成果简介-项目主持人 方晓明

1．项目背景 生物毒素因其对人体的毒性和致癌性，不仅给社会带来重大的经济损失，而且严重威胁消费者的健康。国内外均制定了严格的安全限量标准，但长期以来我国普遍使用的检测技术存在着一些固有缺陷，无法有效地对食品、饲料生产等环节进行有效监测。     

粗镁直接炼制镁阳极合金的研究

利用山西峰华鲜厂现有的生产设备，由粗镁直接炼制镁阳极合金，试验获得成功，本文对阳极合金熔炼工艺过程，合金产品质量，技术经济效益以及镁阳保护合金的使用进行了分析、研究     

氯化镁电解阴极过程机理及液镁析出状态的研究

在７００～７５０℃的温度条件下，应用电化学稳态技术和暂态技术，对氯化镁电解镁离子的放电过程和液镁成核过程进行了研究．在此基础上考察了工艺条件对液镁析出状态的影响．研究表明：镁的析出过程是包含两个电子的受扩散过程控制的简单反应；液镁析出的相过程为三维瞬时成核过程．导出了成核速度和核心生长速度表达式．电解质氯化镁浓度、电流密度、电解温度和电极材料均能影响液镁析出状态．     

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     

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