工程结构中混凝土裂缝控制技术研究

收缩混凝土结构裂缝是工程应用和学术界长期研究和探讨的重要课题。文章从大体积混凝土结构和砌块住宅结构另方面分析了混凝土裂缝控制的技术,从而分析了现浇混凝土楼板裂缝的危害,提出了现浇混凝土楼板裂缝防治策略。     

混凝土建筑结构常见裂缝原因及预防措施

混凝土结构裂缝问题在工程中普遍存在又难以解决,通过结合实践,分析混凝土结构裂缝分类及其出现原因,针对结构裂缝问题提出有效的预防控制技术,为同类工程提供参考借鉴。     

混凝土结构常见裂缝的预防

混凝土结构裂缝,可以说是现代建筑工程的一个通病,在现代各中建筑工程中,几乎都会伴随着混凝土结构裂缝的发生。在建筑工程中出现裂缝,不仅影响了建筑的美观,而且会直接造成建筑的渗渗水漏水,导致建筑物的内在结构被腐蚀破坏,使建筑工程出现更为严重的质量问题。因此,在现代建筑工程施工中,为了确保建筑工程的质量和使用寿命,对混凝土结构常见裂缝进行科学合理的预防势在必行。但是如何才能有效的预防现代建筑工程中混凝土结构常见裂缝呢?就成了当前的建筑施工单位所亟待解决的问题。而为了确保建筑中混凝土结构的质量和性能,加大对混凝土结构常见裂缝的分析研究力度不仅意义重大,而且迫在眉睫。本文通过对混凝土结构常见裂缝的深入分析,并且就如何预防混凝土结构常见裂缝提出了个人看法,以供同行探讨。     

混凝土裂缝原因分析与处理

裂缝是混凝土结构中普遍存在的现象,本文通过分析混凝土裂缝的成因,提出了预防混凝土裂缝的具体措施并总结了对已成裂缝的处理方法,可为类似工程提供借鉴。     

浅谈混凝土温度裂缝成因及控制措施

近年来,我国现浇混凝土结构应用广泛。其中混凝土温度裂缝是影响结构整体性和耐久性常见现象。现就混凝土温度裂缝的成因及控制措施分析介绍。     

浅谈混凝土结构裂缝产生的原因及控制措施

积混凝土开裂后,其性能与原状混凝土性能相差很大,严重影响结构的长期安全和耐久运行.本文分析了混凝土结构裂缝产生的原因和机理,从各个环节提出了预防裂缝的综合措施,以确保混凝土质量,减少裂缝的发生.     

水工结构大体积混凝土裂缝成因及控制处理

在水利工程中保证工程质量是首要任务,工程中的多种结构都是混凝土,因此,保证混凝土的质量和控制混凝土的裂缝数量就显得至关重要。本文根据水工结构的特点,重点介绍了水工结构中大体积混凝土的特点,分析了导致水工结构大体积混凝土产生裂缝的原因,不仅与混凝土自身的收缩、变形有关,也与外界环境和施工过程有关,并针对裂缝成因总结得出控制水工结构大体积混凝土裂缝的几项措施,有利于提高水利工程的质量,保障工程施工顺利进行。     

民用建筑混凝土结构裂缝原因及控制

裂缝是混凝土结构的一种常见病,文章从荷载应力、变形应力和施工三方面分析了混凝土结构裂缝的起因,并有针对性地提出了裂缝预防措施,之后探讨了裂缝的治理措施。     

混凝土的裂缝形成原因与预防措施

混凝土结构由于多方面原因往往会出现一些裂缝,因此,鉴别裂缝、分析裂缝、控制裂缝的产生和发展,并对裂缝的产生进行有效的防治。对保证混凝土结构的整体性及正常使用具有重要的意义。     

结构混凝土初期裂缝处理的应用

结构混凝土收到施工条件、技术和材料等方面的影响会出现裂缝,对于结构混凝土来讲处理好初期裂缝有利于对整个裂缝的控制,同时也有利于结构混凝土功能的实现。本研究根据结构混凝土施工实践,对初期的结构混凝土裂缝处理进行了思考,提供了以处理结构混凝土初期裂缝工序为中心的观点,提出了以裂缝表面处理、密封裂缝、灌注胶注入、后期加工等关键环节的技术应用要点,希望对提升处理和控制结构混凝土初期裂缝有所帮助。     

Development in Information and Communications Technology (ICT) Statistics at the Australian Bureau of Statistics

This paper outlines the ICT statistical developments that the ABS has undertaken over recent years. These developments have been on both the supply side (ICT industry) and the demand side (use of IT by sector). The content of ABS ICT surveys has changed significantly over the last few years and are expected to develop further in line with industry changes and emerging policy needs.
Recent developments in household collections have been the inclusion of IT use questions in the 2001 Census of Population and Housing and in various ABS social surveys such as Children's Participation in Culture and Leisure Activities. Annual business IT use surveys are now conducted and include topics such as Internet commerce and IT security. Biennial ICT industry surveys are conducted to provide data on ICT production, imports and exports, ICT industry employment, performance and structure information. An Internet activity survey is run every six months and provides regional Internet access details and infrastructure details on Internet service providers.
A major development for 2002–03 will be the compilation of an ICT satellite account. ABS intends to produce an ICT Information Development Plan to guide its future statistical development work in the ICT field.     

Value at Risk in the Suburbs: Eminent Domain and the Geographical Politics of the US Foreclosure Crisis

Several US counties and local governments have recently considered a novel solution to the foreclosure crisis. They plan to use eminent domain to compel the owners of mortgage debt—and specifically of private‐label mortgage‐backed securities—to sell the debt to the government at a price reflecting the loan's market value. The government would then restructure the debt and resell it to new investors. The plans are striking because—in contrast to both development‐driven eminent domain and the federal subprime bank bailout—they would force investors to assume asset devaluation and increased long‐term risk. Notably, the plans have emerged as an instance of financialization‐focused politics in suburbs and suburban cities of color, specifically majority‐black and ‐Latino/a suburbs. Local support for the plans, we argue, is rooted in the long‐term disinvestment of these ‘suburbs of exception', which became targets of subprime lending and eventually sites where the ‘financial exception' has been localized. But these demographic shifts, fragmentation and fiscal pressures have at the same time created a suburban political terrain in which the plans have gained their strongest political support.     

Towards a Theory of Serendipity: A Systematic Review and Conceptualization

Serendipity – the notion of making surprising and valuable discoveries – plays a major role in the success of individuals and organizations alike. Previous research has established the importance of serendipity and identified important individual- and organizational-level antecedents. However, the literature has been dispersed and the boundaries of the concept have been blurry, leading to a lack of conceptual clarity and structure, and thus limiting validity and managerial actionability. Based on a systematic literature review, I synthesize existing management-related research on serendipity and explicate the emergence and composition of serendipity in the organizational context. I first identify three necessary conditions that differentiate serendipity from related concepts such as luck or targeted innovation: agency, surprise, and value. Then, I draw from the literature on sensemaking, event-based theorizing, and quantum-based approaches to management to conceptualize the process of cultivating serendipity in the organizational context as a process of enabling potentiality and materialization, and develop a multi-level theory of (cultivating) serendipity. This conceptualization contributes to our collective understanding of how, why, and when (i.e., under what conditions) organizations can leverage the value in the unexpected, which opens up fruitful avenues for further research.     

Accountability of NGOs in Bangladesh A critical overview

NGOs in Bangladesh have been recognized as effective change agents in the socio-economic arena throughout the world. Their contributions in micro credit, non-formal education and primary health care are widely known. NGOs play a significant role in society. NGO accountability, as a result, has become a critical issue. NGO accountability in Bangladesh has been examined here in relation to patrons, clients and themselves. Of the three relationships only accountability to patrons is in a near satisfactory state. Accountability to clients is handicapped by lack of opportunities of beneficiaries to participate meaningfully in NGO policy making. Accountability to themselves is adversely affected due to the adherence to a strictly hierarchical system and the influence of founding and charismatic NGO leaders.     

Towards an Asian model of human resource management? A comparative analysis of China,Japan and South Korea

There has been much discussion regarding the possible decline and weakening of national systems of human resource management (HRM). Yet, culture and institutions are often cited as the major stumbling blocks to this outcome. Such constraints may dissipate in the analysis, particularly if ‘regional clusters’ are considered where geographic and cultural closeness and ‘openness’ to similar economic pressures exist. In such cases, it might be postulated that convergence in HRM will occur. We argue that China, Japan and South Korea represent such a cluster. This article examines these countries, to see if a degree of convergence is taking place and if it is towards an identifiable ‘Asian’ model of HRM. A model of change is presented that distinguishes between levels of occurrence and acceptance. Details of the development and practice of HRM in each country are then set out. The article ends with a discussion and implications section and a brief conclusion.     

Ansätze und Ergebnisse anglo-amerikanischer M&A-Forschung

Based on a review of established U.S. management journals (1995–2003), six schools of thought are identified within the Anglo-American M&;A research: “Capital Market”, “Principal/Agent”, “Industrial Organization”, “Organizational Behavior”, “Human Resources” and “Strategic Management”. The literature review shows that the definition of M&;A success, the methods applied, and insights from empirical research differ according to the respective school of thought. Empirical studies focus on the resource combinations of merger partners, the specific circumstances of merger negotiations, and on integration management as antecedents of merger performance. Unfortunately, empirical findings have not yet provided reliable explanations for M&;A success. Based on the current state of Anglo-American M&;A research, the authors discuss implications for business practice, identify research gaps, and propose areas for future research.     

Introduction of New Technology with a Sound Transition of the Input-Output Structure

We examine the general equilibrium repercussions associated with the introduction of new technologies, using the generalized Leontief system that allows technological substitutions. We show that an untested introduction of cost-increasing technologies in any industry may result in creating a non-productive technological structure that does not satisfy the Hawkins-Simon condition, following the autonomous dynamic adjustment process with structural transitions in the economic system. Therefore, we propose a practicable control scheme of introducing cost-increasing technologies that strictly avoids the creation of non-productive structures in all periods of structural transition, using the available information on the ex ante technological structure.     

The Creation of the Office for National Statistics

A new Office for National Statistics was created in the United Kingdom in 1996 following a series of developments designed to strengthen the relevance and integrity of statistics. This paper describes these fundamental changes and sets out a blueprint for future progress. It also sets current developments in the United Kingdom in an historical and international context.     

What helps? Women engineers' accounts of staying on

We have considerable understanding of the obstacles that women engineers encounter and the reasons that they leave the field, but we know less about what enables them to remain. Adopting an interpretivist approach, this article examines how a group of British women engineers in two FTSE 100 companies account for “staying on” in their male‐dominated work settings. We delineate four specific forms of help that facilitate women's retention in the field. We argue that exposure to help leads to women developing a habitus that enables them to continue working in engineering. To conclude, we draw on our findings to outline HR practices that will facilitate supportive relationships in the workplace and pave the way towards developing more positive organisational climates.     

论现代物流企业的发展观

物流业经过诸多年的发展目前已经成为最热门的行业之一,物流企业的注册数量也与日俱增,达到前所未有的规模。毋庸置疑,任何企业都希望自己迅速做强做大,并成为真正现代物流企业的典型代表,要实现这一目标一个首要问题就是要解决现代物流企业的发展观问题。