电动机调速节能方式的选择与应用

在发电厂辅机设备中,电动机是耗能大户。要降低电动机的能耗,关键问题是选用节能低耗的电动机及调速方式。本文通过对电动机不同调速方式的比较和对内反馈串级调速电动机进行工作原理的分析、现场实际橾作、测试节能效果等调研,认为内反馈串级调速电动机应作为引风机节能降耗的优先选择之一。     

矿用电动机的故障及检修

电动机是煤矿常见的一种电气设备。只有电动机安全运行才能保证煤矿生产正常运行。因此总结一些常见故障及处理方法是必要的。针对煤矿三相异步电动机发生故障的原囚进行分析,并提出有效合适的修复方法,降低了电动机的故障率,提高了电动机的使用效率。     

电动机静态聚合方法的改进分析

在电动机运行中,电力系统暂态稳定、电压稳定的核心因素是电动机参数。而在电力系统稳定计算中,需要建立精确的负荷模型以此保证结果可信度,提高电动机的聚合精度。在目前传统的电动机聚合中,存在聚合前电动机稳态滑差不足等问题,聚合方法需要改进。本文主要对电动机聚合受到的影响因素进行介绍,并在此基础上提出改进电动机静态聚合的措施,为提高电动机静态聚合精度提供参考。     

矿山生产机械和电动机的机械特性

电动机与生产机械的合理配合是正常运行的基本条件,只有认识了生产机械和电动机特性的规律才能选择适当的电动机去带动负载工作,使电动机稳定运行。     

三相异步电动机异常状态与保护措施

电动机常见故障和损坏原因主要是电动机温升过高,绕组绝缘被破坏,造成匝间绝缘短路,从而,使电动机被损坏。下面分几个方面分析电动机异常状     

浅谈电动机在制造过程中降低温升的具体措施

众所周知,电动机的温升作为影响电动机产品质量的重要指标之一,其不仅是现今用户十分关注的问题,也是电动机制造商极为重视的问题。本文笔者即结合个人实践工作经验,对电动机制造过程中与温升有着密切关系的各种因素进行粗浅的探讨,以供参考。     

矿用电动机的故障及检修

电动机是煤矿常见的一种电气设备。只有电动机安全运行才能保证煤矿生产正常运行。因此总结一些常见故障及处理方法是必要的。针对煤矿三相异步电动机发生故障的原囚进行分析，并提出有效合适的修复方法，降低了电动机的故障率，提高了电动机的使用效率。     

浅议电动机再起动与PLC的应用

电动机通常是企业内转动设备的主要动力,大量电动机的停运将给企业造成很大经济损失及生产的混乱,特别是大型连续化生产要求非常高的危急企业还可能引发其他设备及人身事故,损失更为严重。本文主要讲述了电动机再起动与PLC实现电动机再起动的原理及特点。     

煤矿用电气软启动方式的探讨

1、电动机各种启动方式的特点和比较 被选用最广泛的拖动设备,自然是鼠笼型三相异步电动机,用其进行全压启动是最简单、最经济、最可靠的启动方式.但是,当鼠笼电动机启动方式.但是,当鼠很可能电动机启动时,     

浅述三相异步电动机的使用和检修

三相异步电动机是龙门起重机上最重要的部件之一。本文在对龙门起重机上常用的三相异步电动机的使用和检修进行详细分析、总结和阐述的基础上,结合实例对三相异步电动机的常见故障进行了具体分析,对龙门起重机电动机的使用和检修有一定的参考价值和指导意义。     

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.