火电厂锅炉受热面爆管防范措施的研究

火电厂锅炉受热面爆管的原因、机理和表现形式复杂多变,涉及到安装、设计、检修、制造和维护等各个方面,这就要求我们在不断总结经验的基础上采取综合防范措施,从而最大限度地避免锅炉受热面爆管事故的发生。     

国内300MWCFB锅炉水冷壁防磨技术

循环流化床锅炉是一种采用先进燃烧技术的环保型锅炉,与其它类型的锅炉相比,它具有燃料适应性广,燃烧效率高,负荷调节范围大和经济环保等特点。但由于循环流化床锅炉结构、燃料、物料的流动特点,高温高浓度物料在炉内强烈返混的同时也造成了大量物料对受热面的冲刷,使得受热面受到严重磨损.因此受热面的磨损问题是循环流化床锅炉安全经济稳定运行的关键.就全国来看,由于水冷壁磨损泄漏引起停炉的比例约占到40%,已投运的四川白马电厂、中国国电开远发电有限公司2×300MWCFB锅炉、大唐国际红河发电有限责任公司2×300MWCFB锅炉、中国华电巡检司发电有限公司2×300MWCFB锅炉均出现过因受热面磨损爆管造成＂非计停＂的事故。由此可见,如何降低对水冷壁磨损是一个值得研究的课题。     

循环流化床锅炉水冷壁磨损与预防

本文从循环流化床锅炉受热面磨损机理出发,结合重庆松藻电力公司循环流化床锅炉运行情况,对常见的循环流化床锅炉受热面磨损现象进行分析,并提出了有效的防范措施。     

造成大面积水冷壁管爆管事故的原因分析

爆管是指锅炉受热面管子在运行过程中发生爆破事故。由于水冷壁管处于高温辐射区，工作环境非常恶劣，因此在锅炉各类受压元件破坏事故中，水冷壁爆管事故居第一，所占比例超过锅炉事故总量半数以上。     

鹤岗热电厂5号锅炉屏过爆管探讨

锅炉屏式过热器爆管是热电厂锅炉出现的主要事故之一,了解屏式过热器爆管事故的原因,搞清受热面管道失效的机理,并提出预防措施,减少屏式过热器爆管的发生是当前的首要问题。文中针对5#炉两起屏式过热器管子底部弯头处爆破事故进行了分析、吸取经验教训,把防止锅炉泄漏的各项措施落到实处,努力减少锅炉"四管"泄漏次数。     

循环流化床锅炉水冷壁防磨技术探讨

水冷壁磨损问题是困扰锅炉安全运行的主要问题,若不采取防磨措施或措施不当,水冷壁磨损将会日趋严重,爆管停炉的事故频发,严重影响电厂的安全、稳定和经济运行。文章探讨了循环流化床锅炉水冷壁防磨的技术措施,以期改善水冷壁管抗磨和防磨效果,尽可能地避免爆管停炉异常。     

循环流化床锅炉水冷壁磨损原因及预防措施

针对循环流化床锅炉水冷壁磨损爆管的原因,阐述如何从设计和运行调整上减少和克服磨损的产生,以及几种防磨措施。     

燃煤电站锅炉受热面防磨防爆探讨

燃煤电站锅炉受热面磨损是火力发电厂普遍存在的问题。研究分析其磨损机理,掌握锅炉各部位的磨损规律,制定防止或减轻磨损的对策,并在锅炉大、小修中予以实施,对避免因磨损泄漏造成机组停运,有着重要意义。     

浅析省煤器的爆管

结合省煤器结构特点以及布置方式，分析了磨损、振动以及腐蚀等因素对省煤器超温爆管的影响。并提出了一些处理措施。     

循环流化床锅炉省煤器降低磨损可行性探究

通过对循环流化床锅炉尾部受热面从结构上和理论上进行分析,采取防磨措施,降低了受热面的磨损,取得了一定的效果。     

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。