苯并[1，2-b：4，5-b’]二噻吩-thieno[3，4-易]thiadiazole导电性的理论研究

采用密度泛函理论，在B3LYP／6—31G（d）水平下，对苯并[1，2-b：4，5-b’]二噻吩（BDT）-thieno[3，4-b]thiadiaz01e（TD）的低聚物和聚合物进行了理论计算．其中，BDT为电子供体，TD为电子受体，以1：2的方式结合形成化合物，并计算了二面角、分子内的电荷传输、桥键键长和中心键电荷密度．结果显示：随着聚合链增长，共轭程度增加．NICSs值显示：中心环比边环的共轭程度更大．聚合物的能带结构表明：该聚合物的带隙比较低（0．87eV），故其可以作为潜在的导电材料．     

电导率法研究两性聚丙烯酰胺的水溶性

利用水溶液聚合合成了不同组成的两性聚丙烯酰胺（AM／MADQUAT／NaAMPS）,并对其溶液的电导率受NaCl溶液浓度的影响进行了研究,结果表明：净电荷含量较多的两性聚合物在低NaCl浓度下水溶性较好,驱油性能较佳．而净电荷含量较少的两性聚丙烯酰胺（特别是带有高电荷密度的两性聚丙烯酰胺）在高NaCl浓度下水溶性反而好,驱油性能最为理想．     

低维金属边界电子分布和电荷密度波

低维金属边界电子分布和电荷密度波杜俊民，林连堂，张乾二（化学系）Ｐｅｉｅｉｒｌｓ相变理论认为一维金属将发生相变成为半导体￣［１］，同时在原子链内形成ＣＤＷ．有关方面的研究甚多￣［２］．而且Ｐｅｉｅｉｒｌｓ相变理论还被推广到其它的低维体系￣［３］．但是...     

（C6Me6）2Fe.PCNP2类化合物的导电模型

用ＣＮＤＯ／２Ｍ方法计算了（Ｃ６Ｍｅ６）２Ｆｅ．ＰＣＮＰ２和（１，３，５－Ｍｅ３Ｃ６Ｈ３）２Ｆｅ．ＰＣＮＰ２有机导体分子的电荷密度、键级等量子化学参数。计算表明，（Ｃ６Ｍｅ６）２Ｆｅ．ＰＣＮＰ２分子中两个苯环骨架Ｃ原子和Ｆｅ所带的电荷密度分别大于（１，３，５－Ｍｅ３Ｃ６Ｈ３）２Ｆｅ．ＰＣＮＰ２分子的。     

Fe~(3+)和Ce~(3+)共掺杂TiO_2的光谱电化学行为

为开发可降解饮用水中三氯甲烷的光催化剂,采用凝胶法制备了一系列Fe^3＋和Ce^3＋共掺杂的纳米TiO2。用XRD,UV和电化学方法研究了不同Fe^3＋和Ce^3＋配比掺杂TiO2的光谱电化学行为。研究结果表明：Fe^3＋和Ce^3＋掺杂摩尔分数均小于2．0％时,TiO2总是锐钛矿相,x（Fe^3＋）为7．0％时出现少量的Fe2TiO5相,x（Ce^3＋）为7．0％时出现少量TiO2-CeO2相;固定掺杂x（Ce^3＋）为2．0％时,最佳掺杂x（Fe^3＋）为2．0％,此时,TiO2紫外吸收、吸收限红移以及注入电荷密度Qc与脱出电荷密度Qa之比都最大：固定掺杂x（Fe^3＋）为2．0％时,TiO2的紫外吸收、吸收限红移以及电荷密度Qc与脱出电荷密度Qa之比总是随着掺杂的x（Ce^3＋）的增大而增大。     

电荷屏蔽与磁场中的热核反应

讨论了强磁场下，电荷屏蔽对热核反应的影响，结果表明，在相对低的密度下（ρ/μe-10^5mol.cm^-3)，强磁场（-10^13G)使得电荷屏蔽势能增加；增加的屏蔽势对CNO循环中氢燃烧阶段^14N的质子俘获反应有明显的意义，但对其它热核反应，强磁场没有多大影响。     

聚苯乙烯磺酸钠与N,N-十二烷基二甲基氧化胺胶束相互作用的研究

采用浊度滴定法、电泳光散射光和动态激光光散射法研究了聚苯烯磺酸钠（NaPSS）和N－N－十二烷基二甲基氧化铵（DMDAO）胶束的相互作用，浊工滴定结果表明：在临界胶束质子化程度为βc时，NaPSS与DMDAO胶束发生相互作用而形成可溶络合物，此βc对应于介胶束表面电荷密度σc，动态光散射结果表明：在不同离子强度下，DMDAO分别形成了球状和棒状胶束，采用与之对应的模型，计算了临界结合时的胶束表面电荷密度，随着离子强度增加，σc增加，表明相互作用随屏蔽效应增大而减弱，电泳光散射结果也证实了相互作用的存在。     

硅掺杂碳纳米管的第一原理研究

采用密度泛函理论研究了纯（5,5）碳纳米管和硅掺杂（5,5）碳纳米管的几何结构和电子结构,计算了硅掺杂后碳纳米管局部结构的变化、硅掺杂碳纳米管的形成能和表面的电荷分布,以及硅原子掺杂前后碳纳米管的差分电荷密度。研究结果表明硅原子掺杂对碳纳米管的结构影响很大,硅原子与碳原子形成化学键,引起碳纳米管上电荷重新分布,引起电荷转移。     

A—H键振动频率

用价电子平均核势（１）和有效键电荷密度来研究Ａ－Ｈ键振动频率的规律性，得出了一个关系式。用该式计算振动频率的值与实验值非常接近。     

阳离子聚合物对废纸浆DCS稳定性及动电性的影响

研究了阳离子聚合物对废纸浆溶解和胶体物质(Dissolved and Colloidal Substances,DCS)稳定性和动电性的影响.结果表明:高电荷密度低分子质量的聚胺主要通过电荷补丁机理导致DCS失稳;较高电荷密度、较高分子质量的高取代度阳离子淀粉主要通过电荷补丁和桥联絮凝两种作用导致DCS失稳;低电荷密度高分子质量的阳离子聚丙烯酰胺主要通过桥联絮凝机理导致DCS失稳;在理论电荷等当点附近,DCS动电性发生改变.     

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