发动机汽缸压力测试方法探析

发动机的汽缸压力是评价发动机动力性能的一项重要指标,在对发动机进行检查、评价和维修时需要经常测试。文章从汽车实践技术的角度阐述了发动机汽缸压力的测试仪器、测试方法与技巧,并在理论上对测试的数据和测试误差加以科学系统地分析,提出解决办法,为汽车发动机的技术维修提供科学合理的依据。     

AVL845发动机诊断分析系统在发动机状态修中的应用

AVL845型发动机诊断分析系统由主机及各测量传感器和可移动的机架构成。其特点是便于发动机在车测试,且无需加载设备就能对发动机的功率和扭矩特性进行测量。测试原理和功能：AVL845型发动机诊断分析系统可对柴油机和汽油机进行诊断分析,对于柴油机可进行以下几项测试和诊断分析：     

发动机试验车间通风设计实例介绍

发动机试验是测试发动机性能的关键步骤,而发动机试验间排烟系统的好坏则决定了试验所测得的数据是否准确.本文介绍了在发动机实验过程中产生的主要有害物成分以及计算方法,验证发动机试验间通风量计算,并根据大气环境保护的要求,结合工程实例对发动机试验排气污染问题进行分析和探讨。     

活动掠影

"国家民用航空发动机产业计量测试中心"落沪1月26日,"国家民用航空发动机产业计量测试中心"获批筹建,意在推动专用测试设备的开发、计量技术规范及标准的制定,建成民用航空发动机产业计量测试服务创新平台、成果和标准应用平台。     

GM3.0-LPG发动机在线检测与故障诊断

文章介绍了GM3.0-LPG发动机燃料系统的结构和工作原理。在此基础上,设计了发动机在线测试流程,说明了软件调试方法,探讨了发动机燃料系统常见故障的判别方法。结果表明,该测试系统具有安全、易操作、可靠性高、灵敏度高、故障判断准确等优点。     

沃尔沃投资新技术减少功能测试时的尾气排放

日前，沃尔沃集团向外界公布了一项与发动机出厂前所做的功能测试有关的一种用于减少尾气排放量和提高质量的新技术概念。沃尔沃为此投入了超过3.3亿瑞典克朗的资金，并已经在沃尔沃位于巴西的发动机制造厂经过了近一年的测试。测试结果表明，由于使用了先进的背景评估方法，简单的发动机测试可以提供有关发动机功效的全面信息，同时使排放量减少大约85％。2008年，这项新技术将被应用于瑞典Skovde的发动机制造厂和美国马里兰州的Hagerstown工厂。     

发动机冷测试设备失效模式及解决方案

发动机冷测试是通过高精度的仪器和测试传感器来探测发动机的工况,通过数据分析对比来判定发动机的装配质量。冷试设备一般包含机械系统、控制系统和数据采集分析系统三大系统,冷试设备的失效模式主要体现在机械结构方面,文章结合实际案例进行论述,并提出了相应的解决方案。     

液压挖掘机冒黑烟故障分析

某型号液压挖掘机在试装一款新发动机后,发现整机在简单动作时冒黑烟严重,通过对整机的电控程序调整、液压系统的测试、发动机性能测试,最终找到了问题所在,从而解决了该机冒黑烟的问题。     

浅谈发动机引气系统健康测试

本文通过对737NG发动机(CFM-7B)引气系统健康测试介绍为出发点,结合国航重庆维修基地自2009年6月开始引入发动机引气系统健康测试至今的实际排故经验,对于该套系统的使用进行系统的介绍,供大家进行参考。     

液压挖掘机冒黑烟故障分析

某型号液压挖掘机在试装一款新发动机后，发现整机在简单动作时冒黑烟严重，通过对整机的电控程序调整、液压系统的测试、发动机性能测试，最终找到了问题所在，从而解决了该机冒黑烟的问题。     

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.