粉煤灰制备烧结砖主要工艺参数的研究

主要研究了粉煤灰掺量、烧成制度对高掺量粉煤灰烧结砖性能的影响。结果表明，随粉煤灰掺量的增加，坯料塑性降低，干坯和烧结砖的各项性能明显下降；高掺量粉煤灰砖适宜的烧成温度范围在1000—1050℃；在给定的条件下，存在着一适宜的保温时间，当粉煤灰掺量为50％的烧结砖在1050℃下保温5h时制品性能最佳。     

利用活化粉煤灰制备高掺量粉煤灰烧结砖

研究了分别经机械和化学活化后的粉煤灰对高掺量粉煤灰烧结砖性能和显微结构的影响。结果表明：用磨细粉煤灰代替原灰配料，可以改善烧结砖的力学性能，尤其是砖的抗压强度能显著提高。当用掺量质量分数为60％的磨细灰制砖时，烧结砖的抗压强度提高至原灰烧结砖的2倍，并且有更为致密的微结构。在粉煤灰砖中加入质量分数为2％的外加剂D进行化学活化后，可明显改善干坯强度，并提高烧结砖的抗压强度。     

Tu522．1x77 0018高掺量粉煤灰空心烧结砖的研究

Ｔｕ５２２．１ｘ７７００１８高掺量粉煤灰空心烧结砖的研究［刊］／刘小波（湘江矿业学院化工系）／／新型建筑材料──１９９５．（１）．２５～２７叙述了采用挤出成型法生产高掺量粉煤灰空心烧结砖的工艺过程，同时对粘结剂的应用，空心砖的干燥特性、烧结温度的确定...     

用黄河淤泥砂作承重烧结砖的实验研究

以黄河淤泥砂为主要原料，掺加部分粘土和粉煤灰进行了承重烧结砖的研究。通过对原料的理化性能分析，制定了不同实验方案，并对各方案实验结果进行对比，研究。研究结果表明利用黄河淤泥沙配以粘土和粉煤灰生产烧结砖是可行的。     

高掺量粉煤灰实心烧结砖的研制

研究了以压制成型的方法生产高掺量粉煤灰实心烧结砖的工艺过程。介绍了原料的性能、配方组成、成型及烧结工艺。     

项目超市

磁链追踪型注塑机变频控制装置；高效低耗水煤浆制备技术；化妆板原纸生产技术；细菌法发酵生产高纯精制L-乳酸；全粉煤灰烧结砖。     

浅谈粉煤灰在烧结砖中的应用

粉煤灰在烧结砖中具有广泛的应用和巨大的潜力,可以解决环境污染,带来社会与经济效益.介绍了粉煤灰的特性和其在烧结砖中的研究进展,重点阐述了粉煤灰在烧结砖应用中存在的问题,展望了其发展的方向.     

掺合料对水泥复合浆体流动性影响的研究

针对河北省三河市的矿渣、粉煤灰，进行了掺量与水泥浆体流动性关系的研究。结果表明：粉煤灰在40％掺量范围内，净浆流动性随掺量的增大而增大，矿渣在60％范围内随掺量的增大而增大。     

水泥复合土的渗透性能试验研究

为了提高水泥土的工程抗渗特性,本文设计了水泥复合土的配合比,采取正交试验方法,进行了水泥复合土的渗透试验,得到了水泥复合土的渗透系数,并通过极差分析和方差分析,研究了水泥土中的水泥掺量、膨润土掺量和粉煤灰掺量对水泥土抗渗性能的影响,建立了水泥复合土的渗透系数随水泥掺量、膨润土掺量以及粉煤灰掺量变化的回归方程.结果表明:随着水泥掺量、膨润土掺量以及粉煤灰掺量的增加,水泥复合土的渗透系数均逐渐降低;水泥土掺量对水泥复合土渗透系数的影响最大,其次为粉煤灰掺量的影响,膨润土掺量的影响偏小.     

工业废渣对海泥烧结砖泛霜程度影响的试验

研究两种不同特性工业废渣铁尾矿、粉煤灰对海泥烧结多孔砖样品泛霜程度的影响及机理.结果表明:铁尾矿减轻海泥烧结砖泛霜程度的有利因素多,粉煤灰提高海泥烧结砖泛霜程度的不利因素多.此外,掺加外加剂可以在某种程度上降低海泥烧结砖的泛霜等级;当掺量达到某一范围时,能够较大幅度减少砖坯成型用水量,烧成中产生液相的非瘠性工业废渣-铁...     

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