双组分聚氨酯防水涂料的研制

采用Ｔ－８０聚醚多元醇与煤焦油为主要原料，合成了双组分聚氨酯防水涂料，对涂膜性能进行了测试，并对其影响因素进行了研究。研究结果表明，本防水涂料具有良好的耐水性、耐腐蚀性、耐老化性与力学性能     

建筑防水涂料的环境老化试验研究

丙烯酸酯建筑防水涂料应用广泛,其老化性能尤其受到大家关注。本文重点进行了丙烯酸酯防水涂料在我国7种典型大气环境曝晒下的性能研究及试验室加速老化条件下的性能研究,初步探讨了建立相关性的可能。本文的研究将促进丙烯酸酯防水涂料的环境老化研究并推进这种材料的推广应用。     

混凝土抗渗试验密封新技术

混凝土抗渗性能作为稀量混凝土耐久性能的一项重要指标是各试验室主要的检测项目之一。通过研究和改进,开始采用防水涂料密封方法,取得了较好的效果。防水涂料密封法除了成本低于石蜡密封方法外,从工艺、工效、减少污染等方面都具有很多通常密封法无法比拟的优点。     

精纺面料的弹性整理和织物性能

探讨全毛精纺面料的弹性整理及整理后织物的物理机械性能．通过适当调整面料设计规格并在后整理工序中采用化学弹性整理，赋予织物经向或纬向弹力，改善了精纺面料的风格及服用性能．同时采用Siro-FAST仪测试了这种弹性面料的性能．试验结果表明：经弹性整理的面料，其面料的弹性指标可以达到天然弹性织物的技术性能指标．FAST仪测试表明：弹性面料具有较好的成形性，不会造成服装加工中线缝起皱和熨烫困难；但面料在弹性方向上的延伸性指标过高、湿膨胀率大，以及弯曲刚度和剪切刚度偏小，给剪裁和缝纫加工造成一定困难．     

甘南洛大乡碎石土地基的压缩变形性能

碎石土除了具备一般意义上土的性质外,还有自身的一些性质.通过对碎石土进行天然状态及饱水状态下的载荷试验结果进行分析,将实测值与弹性理论计算值相结合,根据结果对碎石土的一些性质进行预估,发现利用弹性理论能较好地符合碎石土的受力变形性能,并通过其他常规试验(如物质组成等)可以分析碎石土的基本结构以及受力变形性能.     

高压下c-Zr_3N_4弹性性质和热力学性质的第一性原理研究

利用平面波赝势密度泛函理论方法研究了高压下c-Zr3N4的结构性质和弹性性质,由此获得了c-Zr3N4在高压下的体弹模量、杨氏模量、剪切模量和泊松比等力学性质.高压弹性常数计算结果表明,在小于50 GPa下,c-Zr3N4没有发生相变,是力学稳定的,而且各向异性因子计算表明其具有弹性各向异性.此外,高压下c-Zr3N4的B/G计算结果表明,在此压强范围内,c-Zr3N4具有较好的延展性.最后利用准谐德拜模型研究了c-Zr3N4的热动力学性质,得到了其高压下的热容、德拜温度和热膨胀系数等参数.研究c-Zr3N4在高压下的弹性性质和热动力学性质,对实验研究具有一定的参考价值.     

PET/PTT复合纤维工艺性能研究

分别测试与分析了3种不同比例PET／PTT复合纤维的热收缩性能、卷曲性能和拉伸弹性．测试结果比较得出，40／60纤维具有较大的热收缩率，50／50纤雏具有较好的卷曲率、卷曲牢度和拉伸弹性回复性能．     

钢-EPS混凝土复合板式建筑结构体系的板缝防水理论与实践

板缝防水问题一直是困扰工程的难题，为此，在材料性能试验、板缝变形观测、模型理论分析和工程修补验证的研究基础上，针对某试验建筑的钢结构外挂板式建筑结构体系的板缝防水机理进行了理论分析，提出了该建筑体系板缝开裂模式，在结合工程实际破坏和材料技术性能试验的基础上，根据钢-EPS混凝土复合板的结构特性，提出钢-EPS混凝土复合板式建筑结构体系板缝的开裂失效机理、板缝防水的构造原理、材料性能及施工技术要求．论述了树脂型弹性砂浆、彩色弹性聚氨酯防水涂料的防水效能。     

一种新型的桥梁防水涂料

一种水性、无毒无污染、粘结强度大、弹性优良、耐高低温范围宽、价格低廉的新型桥梁防水涂料，由青岛润邦化工建材有限公司研制成功。经测试，这种防水涂料各项技术指标均达到Q／02JEH012—2002标准要求。     

一种新型防水涂料的研制

本文叙述了利用合成法制备聚乙烯醇防水涂料的实验内容，并指出该种新型防水涂料具有价格低廉，施工简便，操作安全，不污染环境。防水效果良好等优点，具有推广应用的价值。     

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