谈静态扭矩开发

文章从扭矩监控的角度,分析监控扭矩的工具——静态扭矩的开发,以及利用SPC原理计算静态扭矩和判断静态扭矩是否合理的方法。     

扭矩(汽车)质量的监控

汽车螺纹副的装配扭矩(简称汽车扭矩)与汽车的装配质量和安全性能有紧密的关系。由于汽车大部分零件的联接、紧固是依靠螺纹副的联接,并通过一定的扭矩来保证其紧固质量。如果零件紧固形式失效,将会造成严重的质量、安全事故。如当扭矩过大,汽车在运动过程中,联接部分出现过载的内应力,造成联结螺栓断裂或产生裂纹,发生事故。另外,联结螺纹会出现滑牙,紧固形式失效;当扭矩过小,联接件松动,在汽车运动时产生的震动中,容易出现零件松脱,造成事故。所以说扭矩质量是汽车的生命。该文着重分析影响汽车扭矩质量的因素以及汽车扭矩监控的过程。     

QCOS在扭矩质量过程监控中的运用

在发动机装配及汽车零部件装配上螺栓紧固是最重要、最典型的一种连接方式。螺栓的紧固质量主要通过扭矩来确保,文章从人、机、料、法、环5个方面介绍了影响扭矩的因素,并说明如何使用QCOS工具对扭矩进行监控,以及提出了有效的扭矩过程控制方法。     

QCOS在扭矩质量过程监控中的运用

在发动机装配及汽车零部件装配上螺栓紧固是最重要、最典型的一种连接方式。螺栓的紧固质量主要通过扭矩来确保,文章从人、机、料、法、环5个方面介绍了影响扭矩的因素,并说明如何使用QCOS工具对扭矩进行监控,以及提出了有效的扭矩过程控制方法。     

QCOS在扭矩质量过程监控中的运用

在发动机装配及汽车零部件装配上螺栓紧固是最重要、最典型的一种连接方式。螺栓的紧固质量主要通过扭矩来确保,文章从人、机、料、法、环5个方面介绍了影响扭矩的因素,并说明如何使用QCOS工具对扭矩进行监控,以及提出了有效的扭矩过程控制方法。     

正确使用扭矩扳手

在机械装配过程中,紧固件的扭矩大小是装配工作的关键.如果扭矩过大,严重超过材料的屈服极限,会使紧固件的螺纹断裂、失效,紧固失败.如果扭矩过小,则达不到紧固夹紧效果,会造成紧固失效.扭矩扳手是一种带有扭矩测量机构的拧紧计量器具,用于紧固螺栓和螺母,并能检测出拧紧的扭矩值.文章主要阐述目前常用于生产流水线扭矩控制的手动扭矩扳手的工作原理以及正确的校验方法、使用方法.     

正确使用扭矩扳手

在机械装配过程中,紧固件的扭矩大小是装配工作的关键。如果扭矩过大,严重超过材料的屈服极限,会使紧固件的螺纹断裂、失效,紧固失败。如果扭矩过小,则达不到紧固夹紧效果,会造成紧固失效。扭矩扳手是一种带有扭矩测量机构的拧紧计量器具,用于紧固螺栓和螺母,并能检测出拧紧的扭矩值。文章主要阐述目前常用于生产流水线扭矩控制的手动扭矩扳手的工作原理以及正确的校验方法、使用方法。     

采煤机扭矩轴加载试验研究

通过模拟采煤机工作实际工况,对扭矩轴进行加载试验,测试出被试件屈服扭矩和断裂时的最大扭矩、及断裂时的相对扭转角。验证扭矩轴安全系数在设计上与试验结果是否相符,对扭矩轴设计具有很好的指导意义。     

钻井过程中扭矩传感器的应用研究

在钻井过程中应用扭矩传感器,通过对扭矩参数的解释,能正确指导工程施工,提高录井技术和资料解释水平,有利于快速发现油气显示,能够提高钻井效率、确保安全钻井。文章详细介绍了扭矩参数曲线的影响因素,扭矩参数曲线的形成过程,对不同的钻头事故形成了一般的判别规律。     

面向车身紧固件的扭矩控制研究

汽车紧固件连接作为零件连接的一种紧固方式,其紧固扭矩的大小决定了零件连接是否紧固,这关系到零件连接的强度。目前车身区域的紧固件扭矩控制在流程、工具选择、过程控制等方面存在不足,文章针对车身区域的现行扭矩控制方式进行研究,以提出车身扭矩控制改进的方向。     

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。