大型动叶可调轴流引风机安装质量控制研究

动叶可调轴流引风机具有压力高、风量大、效率高、调节范围广、结构合理、可靠性高、综合经济性好等优点得到广泛应用。动叶可调轴流引风机性能的调节,是通过液压调节系统来改变叶轮叶片的工作角度而实现的。当动叶的角度改变时,其风量、风压、功率也跟着改变。本文从主要施工工艺流程及质量控制方面进行介绍。     

静叶调节系统的原理和维修

<正>一、静叶调节的原理和组成我公司二铁厂高炉风机房原有两台陕西鼓风机厂生产的轴流风机,型号分别为AV45-11、AV45-12,在2007年将AV45-11的轴流风机增加了一级静叶,也改为了AV45-12。它们都是通过调整风机的动静叶片,改变进风角度和面积,从而实现冷风风量和压力的调节,满足高炉生产负荷变化的要求,其静叶调节的原理框图如下:     

大型电力排灌站水泵工况点探讨

排灌站的主机组用泵一般为叶片式水泵,可分为离心泵、混流泵、轴流泵三种基本类型。按叶片安装角的调节方式,轴流泵又可分为固定式、半调节和全调节三种。本文所论及的大型电力排灌站,是指以后两种水泵为泵型的排灌站。     

汽轮机叶片断裂事故原因分析及完善化改造

针对GCS电厂C60-8.83/0.98型汽轮机增容降耗改造后连续二次发生调节级叶片断裂事故原因进行了分析,根据机组在设计上存在的问题,经过仔细研究后提出了完善化改造方案并实施。实施后效果显著,根除了汽轮机调节级断叶片安全隐患。对于汽轮机设计制造及汽轮机增容降耗改造提供了借鉴。     

叶片调节移动装置

介绍了动态联调中叶片调节移动装置的结构.叶片调节移动装置中小轴承箱在移动过程中固定方式及其与风机主体对接的装配.     

电厂热工自动化技术分析

一、自动调节系统应用现状目前,国内几乎所有的机组都采用了DCS控制系统。国外的系统运行可靠但价格昂贵;国内的系统价格低,但是运行和维护的工作量都比较大。根据国内的机组情况,从自动调节系统的角度,将国     

电厂热工自动化技术分析

一、自动调节系统应用现状 目前，国内几乎所有的机组都采用了DCS控制系统。国外的系统运行可靠但价格昂贵；国内的系统价格低，但是运行和维护的工作量都比较大。根据国内的机组情况，从自动调节系统的角度，将国内机组的状况归纳如下：     

电厂热工自动化技术分析

一、自动调节系统应用现状 目前,国内几乎所有的机组都采用了DCS控制系统.国外的系统运行可靠但价格昂贵:国内的系统价格低,但是运行和维护的工作量都比较大.根据国内的机组情况,从自动调节系统的角度,将国内机组的状况归纳如下:     

三坐标测量机在航空发动机叶片型面检测中的应用

本文提出了用三坐标测量机通过二维曲线扫描的方法对航空发动机叶片型面进行检测，并举例对叶型计算时探针半径补偿的误差进行分析。确定此方法是一种快速、准确、行之有效的方法。也为以后在使用三坐标测量机检测叶片型面时，根据叶片扭转的角度选取合适直径的探针提供了依据。     

我国水力资源开发中轴伸贯流式水轮发电机组的设计

1、轴伸贯流式水轮发电机组的整体特征 轴伸贯流式水轮发电机组是一种性能优良、结构简单、安装维护方便的机型,适用于低水头、大流量电站的装机,主要采用转桨式S型为多,流道呈直线状,水流基本上沿轴向流经叶片的进出口,出叶片后,经弯形尾水管流出,水轮机卧式轴穿出尾水管与发电机大轴连接,提高了机组水力效率,水轮机导水叶和转轮叶片双重调节.     

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.     

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。     

浅谈大体积混凝土裂缝的控制

大体积混凝土的裂缝问题是实际工程中长期困扰工程技术人员的问题,其控制技术的研究是混凝土结构研究的热点问题,具有重大的学术价值和潜伏的工程背景。     

Supply Chain Strategies in the UK Fashion Industry—The Rhetoric of Partnership and Realities of Power

This paper focuses on the fashion industry, one characterised by issues such as dramatic shifts in the scale and power of major retail buyers in the market, the advent of retailer own brands, and the nature of sourcing and supply chain decisions, issues that are increasingly global in nature. The aim of this research is to explore the nature of relationships between UK high street multiple fashion retailers and their contracted suppliers, many of whom are entrepreneurial firms by most definitions of the term. Four core themes emerge from the literature and provide a framework for the research, namely, power, process, partnership, and people. The research approach was qualitative, and conducted over a period of twelve months. The paper ends with an agenda for future research.