纳米级热敏电子陶瓷材料钛酸钡的合成

以ＴｉＣｌ４,ＢａＣｌ２－２Ｈ２Ｏ,ＫＯＨ,ＮａＯＨ为原料在ＰＨ值１０－１２,反应温度６０－１５０℃压力０．１－０．３５ＭＰａ、反应时间１－４ｈ下经凝胶 晶转变合成钛酸钡,经有关厂家进行了半导化试验产物借助于ＸＲＤ、ＴＥＭ及化学分析,证明产物达到纳米级钛酸钠水平。     

基于溶胶-凝胶工艺的一种功能性杂化材料研究

以四甲氧基硅 (ＴＭＯＳ)和γ 氨丙基甲基二甲氧基硅烷 (ＡＰＭＤＭＯＳ)为前驱体 ,利用溶胶 凝胶技术 ,通过ＴＭＯＳ和ＡＰＭＯＭＯＳ的水解 缩聚反应制得了一种新的功能化的有机 /无机杂化材料 .探讨了 ｐＨ值、反应温度、水与前驱体的体积比和ＴＭＯＳ用量等因素对水解 缩聚反应体系凝胶时间和光学性能的影响 .借助红外光谱法对该材料进行了结构表征 ,结果表明 :随着ＴＭＯＳ用量、反应温度和前驱体浓度的增大 ,水解 缩聚体系凝胶时间缩短 ,可见光透过率降低 ;随 ｐＨ值的增大 ,可见光透过率和体系凝胶时间出现极大值 .基于溶胶-凝胶…     

ISG工艺合成SrTiO3纳米粒子薄膜

采用ＩＳＧ工艺,在氧化铝陶瓷基片上合成ＳｒＴｉＯ３陶瓷薄膜,研究了溶胶性能和溶胶－凝胶的晶化过程,分析了薄膜的形成及结构。结果表明,ＳｒＯ－ＴｉＯ２复合氧化物系统由凝胶向的单一的立方ＳｒＴｉＯ３相,ＳｒＴｉＯ３陶瓷薄膜晶粒为１０ｎｍ左右。     

固体超强酸ZrO2—SO^2—4催化合成松香甘油酯

研究了固体超强酸ＺｒＯ２－ＳＯ＾２－４催化松香和城油的酯化反应，探讨了催化反应的条件。实验结果表明，ＺｒＯ２－ＳＯ＾２－４对该反应的催化活性较高，可改善产物性能，且易与产物分离，又不产生三废污染。     

固体超强酸ZrO_2-SO_4~(2-)催化合成松香甘油酯

研究了固体超强酸ＺｒＯ２－ＳＯ２－４催化松香和甘油的酯化反应，探讨了催化反应的条件．实验结果表明，ＺｒＯ２－ＳＯ２－４对该反应的催化活性较高，可改善产物性能，且易与产物分离，又不产生三废污染．     

在Pr_3N－P_2O_5－Al_2O_3－H_2O体系中合成AlPO_4－5分

选用三正丙胺为模板剂．采用水热晶化法合成ＡｌＰＯ４－５分子筛。在Ｐｒ３Ｎ－Ｐ２Ｏ５－Ａｌ２Ｏ３－Ｈ２Ｏ体系中研究了水热晶化条件──模板剂用量、反应混合物ｐＨ值、晶化时间和晶化温度等。对ＡｌＰＯ４－５分子筛晶相形成和产物结晶度的影响。通过ＸＲＤ、ＩＲ、ＳＥＭ及ＤＴＡ、ＴＧ等分析手段，表征了ＡｌＰＯ４－５的结构和热稳定性能。     

CaO—BaO—SiO2—TiO2系统溶胶涂液的制备和凝胶化过程

采用溶胶－凝胶工艺制备０．１ＣａＯ－０．１ＢａＯ－ＸＳｉＯ２－（０．８－Ｘ）ＴｉＯ２和ＹＣａＯ－（０．３－Ｙ）ＢａＯ－０．３ＳｉＯ２－０．４ＴｉＯ２（Ｘ＝０～０．５,Ｙ＝０～０．３摩尔分数）两组四元系统浸涂液。根据粘度变化和凝胶时间研究了组成、水和醋酸加入量对溶胶涂液稳定性的影响,得出了配制稳定期长的浸涂液的配比。利用红外光谱和Ｘ－射线衍射（ＸＲＤ）探讨溶胶形成过程和凝胶向玻璃态转变过程中的结构变化。结果表明：溶液中ＣＨ３ＣＯＯ－取代醇盐中的ＯＲ基团分别与Ｓｉ４＋和Ｔｉ４＋配位,形成反应活性不同于原醇盐的新的前驱体醇盐;经５００°Ｃ热处理后凝胶的红外光谱中出现由Ｔｉ—Ｏ—Ｓｉ伸缩振动所引起的吸收带。ＸＲＤ谱证实６０°Ｃ干凝胶中有醋酸盐晶体,５００°Ｃ热处理后,这种晶体消失,凝胶中生成Ｂａ２ＴｉＯ４晶相。     

负载型Ru—Co羰基簇催化剂的XPS和TPD表征

制备了负载型Ｒｕ－Ｃｏ羰基簇催化剂，用Ｘ－ｒａｙ光电子能谱（ＸＰＳ）和程序升温脱羰（ＴＰＤ）等技术，对负载型双金属簇催化剂的表面化学性质和不同气氛中的脱附产物进行了研究，发现负载后，簇合物ＫＲｕＣｏ３（ＣＯ）１２中的ＲｕＣｏ３簇骨架与担体表面原子发生强相互作用。在反应温度下，可形成高分散型催化剂。认为ＣＯ加氢反应是按碳烯机理进行。     

卟啉环上的亲核取代：2.溶剂对2—NO2—TPPCu（Ⅱ）与苯？…

研究了溶剂对２－ＮＯ２－５,１０,１５,２０－四苯基卟啉铜（２－ＮＯ２－ＴＴＰＣｕ（Ⅱ）１与苯酚钠反应的影响,发现反应速度、产物分布与所用溶剂有很大关系。在苯酚中反应,主要产物为碳碳键相连的产物２－（２－羟基苯基）－ＴＰＰＣｕ（Ⅱ２（５０％）和２－（４－在苯甲腈、ＤＭＳＯ、ＤＭＦ和吡啶中反应,４的产率分别为５５％、５２％、４７％和１１．７％。实验结果说明,在反应中存在ＳＲＮ１和ＳＮＡｒ的竞争,质子     

Sol－Gel法制备ZrO_2超微粉末的反应机理研究

以自制Ｚｒ（ＯＣ３Ｈ７）４和Ｙ（ＣＨ３ＣＯＯ）３为原料，应用溶胶－凝胶法（Ｓｏｌ－Ｇｅｌ）制备了ＹＳＺ（ＺｒＯ２－９ｍｏｌ％Ｙ２Ｏ３）凝胶和超细粉末．研究了Ｓｏｌ－Ｇｅｌ形成机理以及ｐＨ值对胶凝时间和凝胶结构的影响．通过ＴＧ－ＤＴＡ、ＸＲＤ等分析手段，研究了从干凝胶到ＹＳＺ超细粉末过程中的反应机理．实验证明：反应可分为３个阶段，钇稳定立方相ＺｒＯ２的合成温度在４７０℃左右     

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