平炉尘合成CoFe2O4的磁性分析

包头钢铁厂的平炉尘含铁量高，粒径微细，以γ-Fe2O3为主，经过提纯分级可以作为生产超细磁性材料的原料，在有Co^2 存在及避免氧化的条件下，将平炉尘转化为超细尖晶石型铁酸盐CoFe^2O4，测定了磁滞回线并对其磁性进行了研究。     

平炉尘合成超细Fe3O4的反应条件研究

包头钢铁厂的平炉尘含铁量高，粒径微细，并以γ-Fe2O3为主，经过提纯分级可以作为生产超细磁性材料的原则。利用同晶型间的拓扑转化原理，在有Fe^2 离子存在及避免氧化的条件下，将平炉尘转化为超细尖晶石型铁酸盐Fe3O4，并和离子反应对比，对其反应条件进行了研究。     

在SDBS分散体系中用平炉尘制备超细Fe3O4

平炉炼钢产生大量平炉尘,内蒙古包头钢铁公司的平炉尘主要成分是立方晶系的γ-Fe2O3．利用同晶型间的拓扑转化原理,将平炉尘转化为超细尖晶石型铁氧体磁性粉末．加入表面活性剂可以降低超微粒子的表面能,减少其团聚倾向．实验证明,在平炉尘中加入15％的SDBS(十二烷基苯磺酸钠)后再反应,可以得到粒径更细且均匀的超细Fe3O4粉末．     

在油酸钠分散体系中用平炉尘制备超细Fe3O4

包头钢铁公司的平炉尘含铁量高．粒径微细，以γ-Fe2O3为主．经过提纯分级可以作为生产超细磁性材料的原料．研究了平炉尘在油酸钠分散条件下制备超细Fe3O4．结果表明．加入表面活性剂可以降低超微粒子的表面能，减少其团聚倾向．得到粒径更细且均匀的超细Fe3O4粉末．     

平炉尘合成超细Fe3O4碱性条件研究

包头钢铁厂的平炉尘含铁量高，较径微细，以γ—Fe2O3为主．经过提纯分级可作为生产超细磁性材料的原料．在有Fe^2 存在及避免氧化的条件下，将平炉尘转化为超细晶石型铁酸盐Fe3O4，对不同碱性条件下的反应进行了比较研究．     

平炉尘合成超细CoFe2O4的反应条件研究

包头钢铁厂的平炉尘含铁量高,粒径微细,以γ-Fe2O3为主,经过提纯分级可以作为生产超细磁性材料的原料.在有Co2 离子、Fe2 离子存在及避免氧化的条件下,将平炉尘转化为超细尖晶石型铁酸盐CoFe2O4,并和离子反应做了对比,对其反应条件进行了研究.     

平炉尘合成超细Fe3O4的反应条件研究

包头钢铁厂的平炉尘含铁量高,粒径微细,并以γ-Fe2O3为主,经过提纯分级可以作为生产超细磁性材料的原料.利用同晶型间的拓扑转化原理,在有Fe2+离子存在及避免氧化的条件下,将平炉尘转化为超细尖晶石型铁酸盐Fe3O4.并和离子反应对比,对其反应条件进行了研究.     

平炉尘综合利用二例

利用包钢平炉生制备了磁性铁氧体（Ｆｅ３Ｏ４），并使用表面活性剂可以获得粒径控制在１００ｎｍ以内的Ｆｅ３Ｏ４成为磁性超细粉．用此法可以制备其它种铁氧体．同时用平炉尘制备了中温变换催化剂，成本低，工艺简单，活性达到化工部部颁标准．具有明显的经济效益．以上的研究可为平炉尘的综合利用开辟新途径，也是环境保护措施之一．目前还未见到此类报导．     

浅谈太钢一钢厂淘汰平炉冶炼技术

太钢第一炼钢厂建于１９３４年，至今已运行６０年多。现平炉车间不仅厂房陈旧，而且平炉冶炼能耗高，工作环境和劳动条件恶劣，生产成本高。根据太钢公司的实际情况，一钢厂改造本着在保证项目建设基本技术要求的前提下，尽量降低一次性投资的原则，把二钢厂已拆除的５０ｔ普通功率电炉实施新技术、新工艺改造后搬迁到一钢厂，以电炉冶炼工艺取代原有的平炉冶炼工艺，并配套方坯连铸机。改造后的电炉采用热铁水新工艺，不但缩短了冶     

爆笑动物生活

相传印度阿育王治斋宴请天下僧道，众人皆已来过，惟独平炉尊者延至日落黄昏之时。王乃问道：缘何你来得这样迟？平炉回答：我赴了天下人的筵席。阿育王奇道：一人如何赴得天下筵席？尊者言：这你就不知了!遂作偈：千山同一月，万户尽皆春，千江有水千江月，万里无云万里天。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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     

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