论建筑施工技术领域的应用

现代建筑技术、新工艺、新材料、新设备的开放和应用,给我国建筑业的发展注入了新的生机和活力。本文重点对建筑技术中的混凝土预制桩的建筑技术、混凝土的控制技术以及低碳建筑的高科技技术等方面进行了详细的阐述和分析。     

建筑给排水技术发展动态初探

伴随着经济的高速发展，以及不断深入推进的改革开放大潮，让我国人均可支配收入从数量上得到了一个很大的飞跃，住宅等级的不断提升，同时也意味着我国建筑水平的不断发展。建筑给水排水技术，就是我国建筑多年发展的缩影。本文分别从九个不同方面，来论述该技术的发展动态。     

混凝土砌块建筑的技术优势及其设计构造

<正> 90年代,混凝土砌块这种新型建筑材料在我国蓬勃发展,混凝土砌块建筑正形成一种新的建筑体系,一方面,是由于我国国民经济发展的总形势下,城乡建筑业兴旺对建筑材料提出了新需求的影响,另一方面,则是混凝土砌块及砌块建筑本身具有一系列技术经济优势。同时,实践证明混凝土砌块及砌块建筑适合我国国情,具有强大的生命力、竞争力     

建筑电气设计中CAD技术的应用探析

随着时代的进步和社会经济的发展,我国建筑行业发展迅速;人们生活质量的提升,对建筑电气设计也提出了更高的要求。为了提升建筑电气设计质量,如今通常将先进的CAD技术给应用过来,这是因为CAD技术具有一系列的优势,建筑电气CAD技术是集电气设计与计算机辅助设计于一体的技术,可以将工程技术人员与计算机相结合,综合有效地进行问题求解的先进信息处理技术,可以促使建筑电气设计质量和工作效率得到显著提升。该文简要分析了CAD在建筑电气方面的应用,希望可以提供一些有价值的参考意见。     

建筑施工技术在高层中的应用与思考

随着我国经济的发展，人们生活水平也在不断的提高，对生活的质量也有了更大的需求，从而使高层建筑在逐步的崛起。高层是城市当中的建筑群体，建筑的形体是比较大的，并且建筑的层数也偏高。高层建筑工程技术可以说在一定程度上带动了公民建筑水平的发展，为我国的经济发展做出了很大的贡献，然而先进的施工技术和机械设备在高层中的运用也给建筑施工带来了许多新的考验，如果不能做到科学合理的统筹安排，势必会影响到建设的利益，为了能够有效的提高高层建筑施工管理的特殊性与重要性。     

略论古代中越建筑艺术交流的特点

古代中越两国在建筑技术方面交流密切，古代中越建筑技术交流的特点有：中国建筑技术传入越南，深刻地影响了越南的建筑风格；中国移民直接参与了越南的建筑工程，把先进的建筑技术带到了越南；古代中越建筑技术交流与中越佛教交流紧密联系在一起；阮安参与明初北京城的设计，反映了越南具有高超的建筑技术，是古代越南人民对中国建筑业的贡献。建筑技术的交流是古代中越化交流的一个重要方面。     

探讨建筑施工技术以及建筑能耗

在分析我国建筑能耗现状的基础上,探讨了建筑能耗的主要形式,以建筑技术为基础,从建筑规划设计、建筑材料的使用、施工建筑技术以及再生能源的利用四个方面探讨了建筑施工改进技术,为节能建筑施工提供参考。     

建筑施工技术中节能理念应用探索

节能与环保问题已经成为当今世界发展的主题之一，面对全球紧张的能源供应局面以及环境污染问题的日益严重，如何在人类发展进程中确保能源供给充足，实现能源的科学合理运用就显得非常重要。我国建筑工程施工是能耗较大的部门，如何在建筑行业内部解决好节能环保问题已经成为我国建筑领域未来发展所必须面对的问题。建筑节能是一系统而复杂的问题，建筑能耗产生在建筑工程施工的多个环节与多个方面当中。为此在建筑工程施工当中需要综合运用各种节能技术，作用于建筑工程的方方面面。为此文章主要就我国建筑行业在建筑节能方面的基本情况进行了简单的介绍，并详细分析了建筑施工技术中节能理念的有效应用这一问题。希望通过节能技术在建筑领域的广泛运用可以为我国的节能环保事业做出一定的贡献。     

对德国被动式居住建筑节能技术的考察

通过对德国被动式住宅建筑的考察,总结了被动式居住建筑节能技术的特点,阐述了我国居住建筑节能的研究现状,提出了被动式节能技术对我国严寒地区居住建筑在节能方面的启示。     

初探智能化技术在建筑电气工程中的应用

在我国建筑业飞速发展的今天,对于建筑电气技术来说也经历了长足的进步。随着计算机技术、信息技术和人工智能技术的逐渐发展和完善,其在建筑电气行业的应用也是越来越普遍。本文就智能化技术在建筑电气工程方面的应用做了分析和研究。     

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