以β-Co(OH)2为前驱体的锂离子电池正极材料LiCoO2

对ＬｉＣｏＯ２ 的结构与电化学性能进行了研究。采用控制结晶法合成出来的层状结构β－Ｃｏ（ＯＨ）２ 作为前驱体,和ＬｉＯＨ混和煅烧,制备出高活性的具有层状结构的锂离子电池正极材料ＬｉＣｏＯ２。试验中,通过差热 热重法分析了煅烧过程的反应机理; Ｘ 光衍射谱表明制得的ＬｉＣｏＯ２ 为α－ＮａＦｅＯ２ 层状结构的 ＨＴ－ＬｉＣｏＯ２; 扫描电镜照片显示β－Ｃｏ（ＯＨ）２ 是ＬｉＣｏＯ２ 优良的前驱体; 性能测试表明制得的ＬｉＣｏＯ２ 具有良好的电化学性能： 其首次充电容量为１５０．１ ｍ Ａｈ／ｇ, 放电容量为１４３．８ ｍ Ａｈ／ｇ, 充放电效率为９５．８％ 。     

一种压电陶瓷降压变压器材料的制备

一种新型添加ＣａＣＯ３、Ｂｉ（Ｃｄ１／２Ｔｉ１／２）Ｏ３、ＭｎＯ２的改性ＰｂＴｉＯ３是压电陶瓷降压变压器的较佳材料、在采用传统的陶瓷制备工艺的基础上,通过实验研究了预烧合成、烧成及人工极化等主要工艺条件对材料性能的影响,得到了这种材料的优化制备工艺。     

类水滑石衍生镁铁混合氧化物的催化性能

采用共沉淀法合成镁铁类水滑石，以其为前体，制备了镁铁混合氧化物，并对样品进行Ｘ射线衍射分析，差热分析及比表面积测定，研究其对逆水煤气变换反应的催化性能，结果表明：催化剂前体具有类水滑石的层状结构，衍生得到的Ｍｇ／Ｆｅ（ｍｏｌ／ｍｏｌ）为１的混合氧化物在温度为６５０℃，ＣＬ２／Ｈ２（ｍｏｌ／ｍｏｌ）为４／１，Ｈ２空速为２８５０ｈ＾－１时催化性能最好，Ｈ２的转化率为７１．５％，ＣＯ的选择性近乎１００％     

5—（4＇—卤代—2＇—羧基苯偶氮）绕丹宁的合成、荧光、￣1HNMR及MS研究

本文合成了三种新的有机荧光试剂：４ＣＲＡＣＰ—Ⅱ，４ＢＲＡＣＰ—Ⅲ，４ＩＲＡＣＰ—Ⅳ，确证了其结构，研究了荧光性质，发现Ⅱ在弱酸性介质中具有较强的荧光。ｐＨ＝５．３时，它与Ｃｕ（Ⅱ）形成荧光络合物，λ＿（ｅｘ）／λ＿（ｅｍ）＝３１０ｎｍ／４０８ｎｍ，检测限５×１０￣（－４）μｇ／ｇ。讨论了卤素对￣１ＨＮＭＲ、ＭＳ及Ｆ的影响。     

MnCO3掺杂对新型改性钛酸铅陶瓷性能的影响

研制了一种新型的改性ＰｂＴｉＯ３陶瓷大各向异性材料,研究了这种新型的性能在不同ＭｎＣＯ３掺杂量和不同的极化电场下的变化,其中包括材料的机电耦合系数、机械品质因素、介电损耗等,ＭｎＣＯ３掺杂量为１．１％－１．３％（ｍｏｌ／ｍｏｌ）时,材料既有大各向异性,又有高机械品质因素,对ＭｎＣＯ３影响材料大各向异性的原因进行了分析,指出锰掺杂从晶界、晶粒及晶体结构等方面同时对材料的性能施加影响。     

SMP(AM/MAA) 共聚物的合成与性能研究

以丙烯酰胺、甲基丙烯酸及甲醛为原料合成了磺甲基化（丙烯酰胺／甲基丙烯酸）共聚物［简称ＳＭＰ（ＡＭ／ＭＡＡ）］,测定了聚丙烯酰胺／甲基丙烯酸［简称Ｐ（ＡＭ／ＭＡＡ）］的转化率与时间的关系．用红外光谱对ＳＭＰ（ＡＭ／ＭＡＡ）及Ｐ（ＡＭ／ＭＡＡ）作了结构表征,测定了不同磺化度的ＳＭＰ（ＡＭ／ＭＡＡ）水溶液的粘度,研究了ＳＭＰ（ＡＭ／ＭＡＡ）的泥浆性能．试验表明：ＳＭＰ（ＡＭ／ＭＡＡ）具有较好的提粘降失水性能和抗钙侵性能．     

CdO-Fe_2O_3复合氧化物半导体气敏材料的制备和性能

采用化学共沉淀法，制备了系列ＣｄＯ－Ｆｅ２Ｏ３复合氧化物气敏半导体材料，研究了制备条件对电导和气敏性能的影响．结果表明：组分氧化物之间在２５０℃开始发生反应；Ｃｄ／Ｆｅ＝１／２共沉淀粉料在６００℃时形成单一尖晶石ＣｄＦｅ２Ｏ４相；电导率和气敏性能随材料体系的化学组成及烧成温度不同而变化；Ｃｄ／Ｆｅ为１／２产物对乙醇有最高灵敏度和很好的选择性；优化制备工艺制得的气敏元件，对低浓度乙醇气体（１００ｐｐｍ）灵敏度高达２０多倍，相当于１０００ｐｐｍ汽油灵敏度的５倍左右，具有应用开发前景．     

锂离子电池正极材料LiCu0．05Mn1．95O3.9V0．1的结构与电化学特性

以溶胶-凝胶法合成了阴阳离子复合掺杂尖晶石型锰酸锂正极材料LiCu0.05M0．95O3.9F0.1 ,XRD表征合成产物具有良好的尖晶石结构；SEM测试表明所合成产物的颗粒达到了亚微米级，且分布均匀，形貌较好。以该物质作为锂离子电池的正极材料组装成扣式电池，经充放电循环测试可知：LiCu0.05Mn1.95O3.9F0.1材料比LiMn2O4正极材料能够更好地抑制电池的可逆容量在充放电过程中的衰减，循环性能有了很大改善，表现出很好的电化学可逆特性。     

O—取代苯基—O—四氯乙基硫逐磷酰胺酯的合成及生物活性研究

ＰＣｌ５与Ｃｌ３ＣＣＨＯ加成后在低温下通入干燥的Ｈ２Ｓ／ｇ，可制得Ｃｌ３ＣＣＨＣｌＯＰ（Ｓ）Ｃｌ２（１），（１）依次与取代苯酚、胺反应合成了１２个具有生物活性的标题化合物。用ＩＲ、ＮＭＲ、ＭＳ和元素分析对其结构进行了表征。并讨论了合成方法、波谱性质和生物活性的规律。结果表明该类硫逐磷酰胺的抑制植物生长活性较高，而硫逐磷酸酯的杀虫活性较高。     

18Cr2Ni4WA钢的组织特征尺寸与其疲劳极限

研究了１８Ｃｒ２Ｎｉ４ＷＡ钢的奥氏体实际是精度和马氏体束径对其疲劳极限的影响．结果表明，这种钢的疲劳极限σｗ与其原奥氏体晶粒度或马氏体板条束径尺寸ｄ的关系为σｗ＝Ｃ＋ｋｄ（－１／２）（Ｃ，ｋ均为常数）；马氏体束径ｄＭ和原奥氏体晶粒度ｄＡ之间的关系为ｄＭ（－１／２）＝Ｃ＋ｄＡ（－１／２）．通过测量钢的组织特征尺寸估算其疲劳性能．     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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