用于铁路声屏障基础的连续钢箱梁设计

采用MIDAS有限元软件建立模型,对(2+32.6+28.6+6.6)m连续钢箱梁进行计算,模拟连续钢箱梁在主力、温度和地震力作用下的受力情况,对比分析连续钢箱梁在各工况下的位移和应力。     

连续钢箱梁拼装施工工艺技术

文章以某快环综合整治项目工程的钢箱梁安装专项施工为案例,对连续钢箱梁的制造加工进行了详细的介绍,并对连续钢箱梁的拼装工艺技术进行了具体的讲解,希望能够为同类工程施工提供参考。     

跨超宽高速公路连续钢箱梁安装施工

本文主要介绍了在天府农博园美丽乡村示范长廊(一期)项目工程跨二绕高速连续钢箱梁施工中,针对连续钢箱梁所上跨的高速公路较宽、跨度较大的特性,通过采用分段分节吊装拼接的的施工方法,从而很好的解决了大跨度连续钢箱梁上跨超宽高速公路的难题,不但保证了连续钢箱梁的吊装安全,同时也确保了下方高速公路通车的安全性.通过设立在下方的临...     

跨高速曲线正交异性板钢箱梁顶推施工技术

本文结合跨渝遂高速曲线段钢箱梁顶推施工过程进行撰写.根据施工现场条件,在不影响高速公路行车的前提下,采用钢导梁加步履式多点顶推施工方法,完成2-45m钢结构连续箱梁顶推施工.结合钢箱梁顶推施工过程,全面介绍钢箱梁分段、节段拼装、箱梁顶推纠偏及落梁控制要点,重点针对钢箱梁顶推施工中顶推支架及拼装支架设计、顶推设备步履机布置、顶推过程中各工况下钢箱梁结构状态监控技术进行撰写.通过跨高速顶推钢箱梁施工技术,确定合理的步履机布置方案,由于跨高速钢箱梁位于曲线段,顶推过程结合对钢箱梁纠偏经验,确定了一套曲线段钢箱梁水平、竖向位移顶推纠偏方法,完成了步履机顶推部位钢箱梁底板局部节点设计,为类似工程提供参考.     

浅议钢箱梁制造及安装监理控制要点

我公司所承担监理的八一路延长线光谷大桥(庙湖段)全桥钢箱梁采用变截面连续钢箱梁,主线钢箱梁全长837m,共分为5联,2个钢箱梁匝道共计240m和9座钢桥墩共计约12000吨。施工监理过程中采取了有针对性的质量控制措施,有力地保证了钢箱梁、钢桥墩制造及安装施工质量,取得了良好的效果。     

复杂海域桥梁小半径钢箱梁吊装施工技术研究

本文以杭甬复线滨海互通匝道桥钢箱梁施工为例,对海上复杂环境下小半径曲线钢箱梁架设从吊装机械设备的选择、吊装工艺工序、钢箱梁焊接工艺等方面进行了分析、验算并顺利实施,可供类似工程参考。     

跨既有城市道路钢箱梁整体吊装施工技术

本文针对既有城市交通系统复杂,存在新建桥梁与既有道路交叉多、施工环境复杂、施工难度增加等问题,鉴于钢箱梁跨度大、架设方便等优点,对跨越既有城市道路的钢箱梁整体吊装施工技术进行了研究,重点分析了吊装施工方案比选、钢箱梁节段分块设计、钢箱梁吊装施工技术,为存在交叉施工现象、城市道路交通流大等复杂施工环境的钢箱梁吊装施工提供指导和借鉴。     

公路高架桥跨电气化铁路顶推架设连续钢箱梁施工技术

本文结合公路高架桥上跨电气化铁路工程实例,详尽地论述了顶推法架设连续钢箱梁施工技术的特点、适用范围、工艺原理、施工工艺流程及操作要点等内容,同时将钢箱梁的单元制做、顶推设备的安装,拆除临时体系关键内容作了交待。     

镇罗黄河特大桥顶推施工过程分析

以镇罗黄河特大桥主桥为例,应用有限元软件分析顶推法施工阶段,对钢箱梁顶推施工进行仿真计算.通过分析钢箱梁在顶推施工过程中的受力性能、变形和关键位置应力等方面,研究整个钢箱梁的顶推施工过程.同时对顶推力大小进行预测,保证主梁在顶推装置的作用下平稳地推进,确保桥梁下部结构的安全性.结果表明:顶推施工期间中,钢箱梁各截面的应力值都在允许范围内;主梁和导梁各截面的变形满足施工中的要求.     

镇罗黄河特大桥顶推施工过程分析

以镇罗黄河特大桥主桥为例,应用有限元软件分析顶推法施工阶段,对钢箱梁顶推施工进行仿真计算.通过分析钢箱梁在顶推施工过程中的受力性能、变形和关键位置应力等方面,研究整个钢箱梁的顶推施工过程.同时对顶推力大小进行预测,保证主梁在顶推装置的作用下平稳地推进,确保桥梁下部结构的安全性.结果表明:顶推施工期间中,钢箱梁各截面的应力值都在允许范围内;主梁和导梁各截面的变形满足施工中的要求.     

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。