汶川5.12大地震给我们的启示

对重块坠落、对重装置脱轨、轿厢与对重在运行中相撞等是汶川5.12大地震对电梯的主要损坏形式,显露出部分电梯在对重导轨与支架配置、对重导靴选型、对重压紧装置设置等方面存在缺陷,电梯的抗震能力亟待提高。     

中国向非洲直接投资的贸易效应实证研究——基于2003—2011年面板数据

基于2003—2011年的面板数据,运用引力模型实证分析中国对非洲39个国家直接投资对中非双边贸易的影响,结果表明:中国对非洲直接投资对中非双边贸易具有显著的促进效应,东道国GDP的规模对中非进出口贸易有正向促进作用,国家间的地理距离对双边贸易不形成阻碍,但双边投资协定对进出口贸易的影响程度不一。     

浅议信息技术对图书馆的影响

本文通过分析信息技术对图书馆的图书载体的影响,信息技术对图书馆的服务形式的影响,信息技术对图书馆的模式的影响,信息技术对图书管理人员的影响,比较全面的分析了信息技术对未来图书馆的影响,并提出了相应的策略。     

设计变更对市政工程造价的影响及控制

本文主要对工程项目的变更对市政工程造价产生的影响进行阐述,并对市政工程变更的定义、原因以及内容进行了具体的介绍,进一步的对市政工程变更对工程造价产生的影响进行了分析,在最后提出了使工程项目变更得到加强的改进措施。     

浅谈加强会计基础工作

会计基础工作是对会计核算和会计管理的基础性工作的统称．包括对会计核算依据的基本要求，对会计资料的基本要求对会计电算化的基本要求、对会计机构和会计人员的配备及管理的要求．对会计档案管理要求、对会计监督的基本程序和要求．以及单位内部会计管理制度等。     

工程总承包理论若干重要问题的探讨

当前我国工程总承包存在着几个重大的理论问题:对工程总承包的承包内容认识混乱;对承担工程总承包项目的主体认识的混乱;对工程总承包模式的根本目的和关键措施认识不够;对工程总承包模式在我国的适用性问题考察不够;对工程总承包模式适用范围的夸大。应该对这些问题做进一步深入的研究,以建立我国完善的工程总承包理论体系。     

二级BAF工艺处理生活污水的效能

采用缺氧、好氧二级无堵塞BAF工艺,处理某电厂生活污水,对COD的去除率为86.6%,对BOD5的去除率为89.23%,对氨氮的去除率为87.7%,对总氮的去除率为83.8%,对总磷的去除率为48.6%,对植物油的去除率为85.71%。结果表明,工艺运行可靠,处理效果稳定。     

飞瀑之下有深潭——记四川省南充市规划和建设局党委书记、局长杜延茂

"对百姓有感情,对工作有激情,对事业有责任",这是南充市委书记、市人大常委会主任王宁对市规划和建设局干部职工的高度评价,是对局党委书记、局长杜延茂的真实写照.     

浅谈岩土工程勘察中地下水的分析评价

本文通过对多年的工程实践经验总结,从地下水对地基承载力的影响;地下水对建筑物的浮托作用;地下水渗漏对地下室的影响;地下水对基础的腐蚀性影响;地下水对施工条件的影响等几个方面分析评价岩土工程勘察中地下水对建筑物的影响。     

关于奥运建筑对城市区域改变的问卷调查

对于一座有几千年历史的古城来说.奥运建筑会对北京城市形象和人民的生活带来什么样的影响?奥运建筑的建成是否会改变人们对城市的认知度?是否会得到城市居民的认同?在问卷调查中.很多人对北京奥运场馆的选址比较认同.对于奥运建筑对城市形象的影响能够采取比较理性的认识态度.显示出城市居民对城市现象的关注以及保护古城风貌的意识.绝大多数人表现出对生态环境的关注和对北京交通状况的担忧。从问卷调查来看.北京具有一座国际化城市的包容性.人们对城市普遍有认同感。     

Zustandsuntersuchung und Instandsetzung am Hauptdach des Hauses der Kulturen der Welt in Berlin

The main roof of the ”Haus der Kulturen der Welt“ in Berlin Which is very well‐known on account of its history and striking structural design – was to be inspected by the author to determine its condition and analysed with regard to the durability of the existing liquid synthetic sealant. The roof structure consists of a biaxial, curved area‐covering structural element with circumferential edge beams of pre‐stressed lightweight concrete. This is the result of the reconstruction between 1984 and 1987 following a partial collapse of the then Berlin Congress Hall in 1980. The very thin roof shell is also made of lightweight concrete and, like the edge beams, has a polyurethane‐based spray‐on seal that was specially developed for this purpose as protection against the ingress of moisture. The reason why this, at the time, novel type of seal was chosen was that it should take into account the fact that the roof design urgently needed some kind of protection against moisture that had to compensate the expected changes shape and crack movements of the roof with no damage. The following article reports on the nature, scope and main results of the analysis of the condition of the roof seal, edge beams and abutments. It will also describe the repair recommendations resulting from the investigations, which form the basis of the execution of work at the present point in time. Apart from presenting the technical principles and special features of the building that have to be taken into account during any repairs, the special features of the execution will also be addressed.     

Magnetoelastische Spannkraftmessung in Bauwerken

Magnetoelastic Measurement of Prestressing Force in Civil Structures The knowledge of the tensile force of prestressing steel elements and its reliable and non‐destructive determination are of essential importance for the assessment of the structural health condition of prestressed concrete structures and tie‐back systems in terms of structural safety, serviceability and durability. For the evaluation of the prestressing force in steel tension members, the measurement technique presented in this contribution is using the magneto‐elastic effect (ME‐effect) of ferromagnetic materials. This effect describes the reverse‐proportional correlation between the mechanical stress and the magnetic properties of ferromagnetic materials. The cylindrical coiled sensors pushed over the tendon and the measuring device developed and practically optimized at the iBMB/MPA of the TU Braunschweig enable a fast and reliable measurement of the prestressing steel force after an initial calibration. In this contribution first the state of the art of prestress measurement techniques for steel tension members is presented. Afterwards, the ME‐measuring method with the basics and merits of magneto‐elastic prestressing force identification is shown. Further recent research results as well as several building applications will be discussed.     

Erfahrungen bei der Beurteilung der Dauerhaftigkeit vorgespannter Bewehrung von älteren Spannbetonbrücken

Experiences due to the evaluation of the durability of prestressed reinforcements in old prestressed concrete bridges. Old prestressed concrete bridge superstructures exhibiting cracks across the prestressed reinforcement need detailed inspections for estimating maintenance requirements. Only this type of evaluation makes it possible to determine the required extent and nature of maintenance. In this paper essential steps of the “Directive of the durability of prestressed reinforcements in old prestressed concrete bridge superstructures” of the Federal Highway Research Institute are explained, also against the effects of growing heavy traffic with expected higher gross weights and axle loads.     

谈贯标中企业如何做好检验和试验工作

根据在贯彻GB／T 19001－ISO9000族标准过程中的实际工作经验,从贯彻中为什么要抓好检验和试验工作入手,对检验和试验依据的管理,检验和试验设计的控制,检验和试验人员的培训,检验和试验记录的填写,保存和分析四个方面进行了论述,阐述了检验和试验工作在贯标中的重要性。     

Colour and turbidity removal with reusable magnetite particles—VII: A colloid chemistry study of the effect of inorganic ions on the efficiency of clarification

The removal of colour and turbidity from natural waters by the addition of magnetite is an interfacial process. Furthermore the components of this system are either of colloidal dimensions or of a surface active nature and thus this method of water clarification is very much in the realm of surface and colloid chemistry. Electrokinetic techniques have been used to examine the influence of a number of inorganic species, commonly encountered in the practical situation, on the surface properties of magnetite and consequently on the efficiency of the process.     

Alternative Methods of Procurement for Works of Water and Environmental Management

The paper considers methods of procurement for the construction of water- and sewage-treatment works other than the traditional use of the ICE 5th Edition Conditions of Contract and Bills of Quantities. This is as a consequence of the speed at which schemes are currently required within the water industry.
The paper particularly focuses on the use of target contracts, using the Institution of Chemical Engineers'Green Book form, and considers various types of target. It also discusses the form which tender documents may take, and how targets may be calculated.
Tendering procedures, including the use of two-stage tenders and negotiated targets, are considered, as are the procedures for cost monitoring and the financial management of the contract. Finally, the role of the engineer and quantity surveyor is considered.     

斜坡失稳的突变模型与混沌机制

针对斜坡平在滑动失稳问题,运用突变理论方法,给出了快速滑坡和慢还滑坡发生的判据,提出了刚度效应失稳新理论,指出刚体极限平衡稳定性评价方法有较大缺陷;根据建立的斜坡演非线性动力学模型,发现外部环境因素的作用一斜坡系统的响应有复杂的非线性关系,当斜坡本身的非线性作用与外部环境因素的作用能力相当时,斜坡化过程会出现混沌现象,其通向混沌之路是通过倍周期分叉实现的。     

River water quality of the River Cherwell: an agricultural clay-dominated catchment in the upper Thames Basin, southeastern England

The water quality of the River Cherwell and a tributary of it, the Ray, are described in terms of point and diffuse sources of pollution, for this rural area of the upper Thames Basin. Point sources of pollution dominate at the critical ecological low flow periods of high biological activity. Although the surface geology is predominantly clay, base flow is partly supplied from springs in underlying carbonate-bearing strata, which influences the water quality particularly with regards to calcium and alkalinity. The hydrogeochemistry of the river is outlined and the overall importance of urban point sources even in what would normally be considered to be rural catchments is stressed in relation to the European Unions Water Framework Directive. Issues of phosphorus stripping at sewage treatment works are also considered: such stripping on the Cherwell has reduced phosphorus concentrations by about a factor of two, but this is insufficient for the needs of the Water Framework Directive.     

景框的中介——电影与建筑中的动态布局

本文探讨了作为电影和建筑中的一个主要空间构成主题——景框理念。对空间的电影几何关系和建构几何关系的设置.体块、空间、视角、景观、相机和演员的相对位置和组织等.会产生特殊的张力、关系和动态——所有这一切都指向景框所带来的触媒作用和示能作用。电影与建筑中的空间是许多潜在的力量和相互作用的动力场,它涉及对空间景框、机制和策略的部署与调控,由此实现构成的、语义的和叙事的目的。景框建立了边界,但也促进并提醒可能会遇到的那些模棱两可、针锋相对与制约的突破.以及一种呈现怪诞特征的潜力。