砂质高岭土在玻化砖中应用的研究

本文论述了砂质高岭土在玻化砖中的应用，给出了玻化砖坯体配方、生产工艺参数、晶相组成及其它性能。在现代化生产线上生产了符合国家建材行业标准的玻化砖产品。     

霞石制作玻化砖的研究

本文主要对利用霞石制作玻化砖的可行性进行了研究。结果表明,在霞石中添加适量的石英、粘土等辅助原料,可以制成符合玻化砖性能要求的制品。利用该原料生产玻化砖的最佳烧成温度为（１１５０±１０）℃。     

低温快烧玻化砖的研究

研究了低温快烧陶瓷玻化砖的烧结性能与化学组成、原料种类之间的关系。成功的研制了在１１３０℃×６０ｍｉｎ条件下烧成，各项性能指标均达到检测标准的玻化砖产品。     

大尺寸墙面玻化砖空鼓原因的分析和处理

以某行政楼墙面玻化砖使用过程中产生的问题及其解决为例,分析了墙面玻化砖脱落产生的原因,介绍了经过实践检验后有效的修复方法．最后提出了大尺寸玻化砖墙面施工的一些注意事项和建议．     

内墙装饰干挂玻化砖工艺应用探讨

在我国现代建筑工程项目设计与施工中,内墙装饰都具有十分重要的作用。国内传统的内墙装饰普遍采取内墙涂料、湿贴墙面砖或帖壁纸等施工工艺模式,但是在长期的实际应用过程中,这类型工艺应用的局限性和弊端就日益暴露出来了。通过国内建筑行业设计单位和施工单位技术人员的共同研究与探索,干挂玻化砖工艺逐渐得到广泛的应用,并且取得了较好的实际效果。本文仅就内墙装饰干挂玻化砖工艺应用作以简要的探索与讨论。     

煤矸石制备玻化砖的实验研究

为研究峰峰煤矿矸石制备玻化砖的可行性,采用室内试验的方法,在峰峰煤矿矸石中掺加适量的伟晶花岗岩、长石、石英等岩石矿物制备瓷坯,实验研究了不同配比和烧成温度下瓷坯的膨胀性、吸水性和抗折强度。研究发现:煤矸石的最高掺量可达80%,瓷坯的收缩率、吸水率、抗折强度可分别达8.58%,0.11%,68.4MPa,均能满足制备玻化砖的要求。该研究对于煤矸石资源化利用具有指导作用。     

一次低温快烧外墙砖的研制

介绍利用天水本地及周边原料张川长石、透辉石、通渭土等原料研制一次快烧玻化砖的工艺过程,其产品质量达到国家标准,并投入大量生产.     

推荐项目

项目索引通联信息石及玻化砖育苗技术源装置术术业废水新技术剂联系单位北京大学科技开发部联系人杨永年许英赵淑茹江岚电话０１０－６２７５１４４６６２７５５４５５邮编１００８７１地址北京大学红三楼联系单位中国科学院沈阳自动化研究所科研处联系人李桂菊电话０２４－２３９７００１７邮编１１００１６地址沈阳市东陵区南塔街１１４号联系单位北京科技大学科研处联系人刘月娥董成文电话０１０－６２３３２２０６６２３３２５５３邮编１０００８３地址北京市海淀区学院路３０号联系单位中国科学院安徽光学精密机械研究所联系人王晓光电…     

铁城牌磨具

铁城牌磨具系列产品,是中山市新型建筑材料总厂引进国外先进设箭,自行设计研制,并配套先进的工装模具和完备的计量测试手段,进行专业生产和经营。适用于玻化砖、微晶玻璃、钒钛砖等新型饰面板材和水磨石、大理石、花岗石的研磨和抛光。1994年年通过技术鉴定:“产品具有耐磨性好、切削边强、板材磨削后光泽度高等特点。建筑装饰石材用磨具系列填补省内空白,陶瓷用磨具系列属国内首创。经用户使用证明,产品性能良好,可以代替进口产品,具有良好的经济效益和社会效益。产品荣获“1994年广东省优秀新产品”称号,被评为1995年度国家级新产品。目前产品普遍应用于贝德里尼、百制通、格黑哥利、西玛、史密斯等引进的国外先进生产线。销售遍布全国各地,远销香港和东南亚地区。     

激光光谱学 2007年ICOLS第十八届国际会议录

关于激光光谱学的第十八届国际会议于2007年6月24～29日在科罗拉多州的特柳赖德举行。激光光谱学的国际会议具有悠久的历史传统，而ICOLS-07是一次真正的国际聚会，有来自21个国家的173名代表和34名陪同嘉宾参加。（澳大利亚，奥地利，加拿大，中国，丹麦，法国，德国，爱尔兰，以色列，意大利，日本，荷兰，新西兰，波兰，俄罗斯，南非，瑞典，瑞士，台湾，英国和美国。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to