铁路桥梁混凝土施工质量控制

混凝土施工质量的优劣直接影响到桥梁的整体质量和运营，加强混凝土施工质量的控制应该从施工过程中的各道工序做起。从混凝土施工过程中的模板工程、钢筋工程以及混凝土工程3个方面，对铁路桥梁混凝土施工质量的控制进行了论述，提出了相关的要求，对混凝土桥梁混凝土施工质量的控制，具有一定的指导意义。     

刍议土建工程中混凝土施工质量控制

在我国的土建工程中，混凝土施工占有很大的比例。在施工中掌握影响混凝土质量的主要因素，切实控制施工质量，进而促进我国混凝土施工技术等方面的发展。混凝土质量的好坏，对结构物的安全和结构物的造价有很大影响，因此在施工中必须对混凝土的施工质量有足够的重视。     

大体积混凝土施工技术分析

从合理选择施工材料，优化混凝土配合比，优化混凝土的供应，采用科学的施工方法，加强混凝土养护等方面介绍了大体积混凝土施工技术，以达到降低混凝土温度应力和提高混凝土本身抗拉性能的目的。     

浅谈房屋建筑混凝土施工措施

混凝土施工技术作为房屋建筑工程施工中的技术之一，它的耐用性及安全性还是比较好的，受到施工人员和广大业主的一致欢迎。但在施工中因天气气候，施工条件，人员素质等各种因素，也会直接导致房屋建筑混凝土施工的质量问题。本文试从房屋建筑混凝土施工构造、房屋建筑混凝土要点方面加以阐述，来说明我国房屋混凝土施工的重要性、科学性、紧迫性。结合实际，就房屋建筑混凝土施工特点，要点等环节做了进一步分析，希望能给我国的房屋建设做些贡献。     

混凝土蜂窝麻面形成的原因及对策探究

混凝土属于极为重要的施工材料，在混凝土施工中，蜂窝麻面问题较多，严重影响混凝土外观质量。该文结合工程实倒，对混凝土蜂窝麻面形成的原因进行探索，并提出消除混凝土蜂窝麻面的对策，提高混凝土外观质量。在混凝土施工中，严格控制混凝土配合比，保障模板制造及安装质量，加强混凝土浇筑与养护管理，是实现混凝土蜂窝麻面防治的重要措施。     

呼和浩特抽水蓄能水电站厂房混凝土冬季施工温度控制

内蒙古呼和浩特寒冷季节持续时间相对较长，由于受工期制约，厂房混凝土冬季施工是不可避免的。本文简要介绍呼和浩特抽水蓄能电站厂房混凝土冬季施工温度控制措施，避免混凝土早期受冻，保证冬季混凝土施工质量。     

土木工程中混凝土施工技术探析

近年来，随着时代的发展，城镇化建设工作得到大力发展，土木工程施工数量日益增多。在城市化建设进程中，人们的生活品质有了大幅度的改观，更加看重建筑工程施工品质，因而对建筑施工技术质量要求也变得愈加严苛。基于此，本研究重点针对土木工程施工中混凝土施工技术展开研究，主要探析土木工程混凝土施工技术的常见问题。通过对混凝土施工现状加以分析，详细阐述了土木工程施工中提升混凝土施工品质的具体措施。     

高强混凝土在超高层中的应用

配制高强混凝土时粗骨料的选择是关键；粉煤灰、高效减水剂的种类和掺量对高强混凝土性能有较大影响；施工中严格按配合比施工，按混凝土施工工艺及施工方案组织施工，施工后期加强养护是保证高强混凝土施工质量的关键。     

大体积混凝土施工技术及温度控制措施

针对大体积混凝土施工易产生裂缝的技术难题，介绍邯郸输元河大桥承台施工中加强大体积混凝土施工各环节的技术措施控制，减少混凝土内外温差，控制温度应力，避免产生温度裂缝，从而提高大体积混凝土抗裂、抗侵蚀性，提高混凝土结构的耐久性。     

浅谈清水混凝土施工工艺

近几年来随着施工水平的提高，施工质量标准也不断提高，清水混凝土施工工艺在高层框剪结构中应用越来越广泛，所谓清水混凝土就是在混凝土结构施工时，一次成活。在现浇混凝土楼面上不再做细石混凝土找平层或水泥砂浆抹灰层、顶棚及墙饰面亦不再抹灰，而仅在面层批刮腻子。清水混凝土的前提就是混凝土结构在施工过程中达到清水混凝土标准。因此要求混凝土表面平整光滑，色泽均匀，无碰损和污染，对拉螺栓及施工缝的设置应整齐美观，且不允许出现普通混凝土的质量通病。     

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