现代混凝土坡屋面结构设计

介绍混凝土坡屋面结构设计,通过实例举证提出结构设计注意事项。     

混凝土框架的改扩建结构设计及施工

本文是作者根据某建筑楼的结构设计实例,简要介绍了某建筑楼自己有建筑结构设计特点和结构布置原则与新建建筑结构设计的连接问题的探讨,同时,针对坡屋面具有节约能源、美化市容、应用前景广阔等优点,做了详细阐述。     

混凝土框架改扩建结构设计

本文是作者根据某建筑接的结构设计实例，简要介绍了某建筑楼自已有建筑结构设计特点和结构布置原则与新建建筑结构设计的连接问题的探讨，同时，针对对坡屋面具有节约能源，美化市容、应用前景广阔等优点，做了详细阐述。     

求解同坡屋面交线的新方法

同坡屋面是坡面的一种形式，它具有许多显著的特点，因而得到广泛的应用。求同坡屋面交线是同坡屋面设计中的一个重要部分，本文首次提出虚、实结合，高、低屋脊等新的概念，从而找到了一种求同坡屋面交线简捷而有效的方法。     

浅析常见现浇混凝土坡屋面施工方法

通过对现浇混凝土坡屋面的构造特点和施工难点的分析,从屋面板混凝土结构浇筑和屋面找平层、防水层等重要部位以及天沟、檐沟、出屋面管道细部节点处理的施工措施上,阐述了常见坡屋面施工的方法。     

低矮带檐口曲面四坡建筑屋面风压数值模拟和抗风优化

采用Fluent软件与RNG(Re-normalization group) k-ε湍流模型,数值模拟我国东南沿海地区常见的一类带檐口低矮曲面四坡屋面的风压.重点分析了屋面坡角、风向角、檐口类型等参数对四坡屋面平均风压及周围风场的影响.研究表明,上述参数与屋面风压都密切相关.随屋面坡角增大,迎风屋檐处峰值风吸力减小,背风面风吸力增大;配置檐口可显著改变屋面子块区域的平均风压系数,从而使屋面抗风性能得到优化.     

钢筋混凝土斜坡屋面的结构设计及构造

近几年，钢筋混凝土坡屋顶的应用已经十分广泛，对于斜坡屋面结构设计，应选用合理的结构设计计算方法及构造处理，这不但能给结构专业带来效益，还能给建筑专业的设计开拓新余地，也能让广大用户、房地产商受益，其意义深远。     

探讨坡屋面渗漏原因及防治建议

坡屋面防水是一个老生常谈的话题,时至今日坡屋面渗漏现象也普遍存在。针对多种多样的坡屋面渗漏现象,结合实际工作中发现的问题,从设计、材料、施工方面对工程中出现坡屋面漏水进行了分析,并提出三方面的建议及期望。     

坡屋面渗漏原因分析及防治措施

坡屋面渗漏已经成为目前工程质量的一大通病,文章根据工程渗漏实例,从设计、结构、施工及人的主观意识等方面,分析产生坡屋面渗漏的原因。针对产生渗漏的原因,从保温层、防水层的设置,防水材料的选用,结构变化处的处理,施工工艺及施工管理等方面论述了防止坡屋面渗漏所采取的一系列措施。     

浅析建筑坡屋面设计与施工

建筑坡屋面是一种常见的屋面造型处理方式,坡屋面设计对于增加建筑空间,节约用地和能源,丰富建筑造型,美化建筑都有着举足轻重的作用,同时坡屋面给建筑物增添了很多亮丽的点缀,但坡屋面在施工完成使用不久之后,在檐口、天沟、屋面转折部位,很容易产生屋面渗水现象,而且维修起立比较繁琐,漏了修,修了漏成了一种怪圈,     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the