乙二醇/正辛醇二元体系汽液相平衡数据的测定及关联

为了采用共沸精馏方法模拟分离乙二醇和1,2-丁二醇,用汽液平衡釜测定了30.4kPa条件下乙二醇-正辛醇二元体系的汽液相平衡数据,分别采用Wilson方程和NRTL方程对该汽液相平衡数据进行关联,并进行热力学一致性检验。结果表明实验数据符合热力学一致性,获得了的Wilson方程与NRTL方程参数,模型计算结果均与实验数据都吻合,可满足工程设计需要。     

正丁醇-异丁醇-水体系液-液-汽相平衡的研究

本文测定了正丁醇—异丁醇—水三元体系沸点下液—液相平衡和汽—液相平衡数据。用似三参数Wilson方程对所测汽液和液液相平衡数据统一进行了关联和比较,用NRTL方程和UNIQUAC方程对汽—液相平衡数据进行了关联和比较。     

甲基叔丁基醚—甲醇二元体系汽液相平衡的研究

用静态法实测了甲基叔丁基醚－甲醇二元体在0.4-0.8MPa下的汽液相平衡数据，并进行了恒压下热力学一致性检验，用NRTL和Wilson方程关联有关数据，结果表明实验数据可靠，NRTL模型拟合精度较好。     

异丙醇胺-水体系的汽液平衡

采用鼓泡式平衡釜测定了一异丙醇胺-水、一异丙醇胺-二异丙醇胺以及水-二异丙醇胺等二元体系在65℃、80℃、95℃时的恒温汽液平衡数据。用vanLaar、Margules、NRTL、Wilson、UNIQUAC等5种方程对其进行关联,求出模型参数,利用所得模型参数计算相应的汽相组成,并与实测值比较,二者符合良好。     

丙酮-丁酮醇、丙酮-二丙酮醇二元汽液相平衡

采用Rose汽液平衡釜测定101.3 kPa下丙酮-丁酮醇、丙酮-二丙酮醇二元体系汽液相平衡数据,并使用Wilson、 NRTL和UNIQUAC模型对测定的实验数据进行关联,得到相应的二元交互参数.对该体系的汽液相平衡进行预测,预测值和实验值吻合良好,说明3个模型都能准确描述该体系的相平衡行为.采用Herrington经验法对相平衡数据进行热力学一致性检验,结果表明所测得数据可靠.本研究结果可为丁酮醇生产的工艺设计提供基础数据.     

氢氰酸-丙酮-水三元体系汽液平衡的关联

用Wilson方程、多参数wilson方程和NRTL方程对丙酮-水、氢氰酸-丙酮、氢氰酸-水二元体系的汽液平衡数据进行了关联；而对氢氰酸-丙酮-水三元体系采用仅与相应二组分能量配偶参数有关的三组分Wilson方程、多参数wilson方程和NRTL方程分别进行椎算预测．关联的结果和推算的结果与实验数据比较基本一致．结果表明：采用有关组分的二元体系的配偶参数来预测多元体系的汽液平衡数据是可行的.     

VAC-TB-H_2O三元系的相平衡—汽液、液液平衡数据的测定和关联

本研究以适用于部分互溶体系改良式Othmer釜测定了1atm下乙酸乙烯酯—甲基丙醇—水(VAC-TB-H_2O)体系的汽液和液液平衡数据,应用NRTL方程和多参数Wilson方程对平衡数据进行了关联。     

丙酮-正丙醇二元系的等温汽液平衡研究

用改进的Dvorak-Boublik汽液平衡釜测定了丙酮-正丙醇二元体系在30℃,35℃,40℃下三组等温汽液平衡数据,用点检验法检验了测定的平衡数据,并分别选用了Wilson和UNIQUAC方程进行关联。     

苯甲醛新工艺开发中相平衡的研究

用改进的平衡釜测定了1.13×105Pa压力下甲苯-苯甲醛、甲苯-苯甲酸、苯甲醛—苯甲酸三个二元体系和甲苯- 苯甲醛- 苯甲酸三元体系气液平衡数据，对二元数据，用点检验法进行热力学一致性检验，用Margulus、Wilson、NRTL、UNIQUAC等方程进行热力学关联，推算了三元汽液平衡关系，并与实测值作了比较，均获得良好的效果．     

二甲基二乙氧硅烷-甲基三乙氧基硅烷二元体系等压汽液平衡研究

利用新型泵式沸点仪，在101．3kPa下测定了二甲基二乙氧基硅烷-甲基三乙氧基硅烷二元体系汽液相平衡数据，并对甲基二乙氧基硅烷和甲基三乙氧基硅烷的临界性质进行了估算，分别用Wilson，NRTL,Margules，VanLaar四种模型进行了关联。     

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