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1.
冷凝器是冷柜制冷系统的重要部件。介绍了近几年运用价值分析方法对冷柜用冷凝器通过材料替代、合理选型、减少维护等,在综合功能不变的情况下,降低综合成本方面开展的工作。  相似文献   

2.
贮氨器是氨制冷系统中贮存来自冷凝器的高压氨液的容器,它主要解决向制冷蒸发器供液与回气量不平衡的矛盾,在小型冷库中兼有贮备制冷的作用.  相似文献   

3.
本文旨在厘清电动汽车高压电缆的用户(主机厂和线束厂)对用于连接高压电池、逆变器、空调压缩机、三相发电机和电动机的高压电缆的各种技术需求;提出了作为汽车零部件供应商和现有的标准的低压汽车电缆设计相比在机械和电气要求方面开发高压电缆面临的挑战.本文也阐述了采用设计方法、材料和电缆选型克服挑战,同时满足汽车行业的严格要求的途径.  相似文献   

4.
整体多层包扎高压蓄势气水罐中的人孔,用优化的凸缘结构来代替高颈法兰和人孔接管,用反向法兰盖自紧密封,即节省了材料,又便于制造,从而降低成本。  相似文献   

5.
介绍了机载SAR发射机高压部分的设计和工艺部分的工作,主要简述了发射机高压部分的组成,以及高压绝缘的设计工作。对灌封材料进行比较和选择,采用硅橡胶做为高压灌封材料,通过控制灌封的工艺程序,比较成功的解决了发射机高压绝缘与散热。实现了机载发射机的高稳定高可靠的工作。  相似文献   

6.
电力体制改革的不断深化,要求供电企业在电力客户工程中不得指定设计单位、施工单位和设备材料供应单位。详细说明供电企业在高压业扩工程中执行"三不指定"要求后遇到的难题,提出了具体的对策。  相似文献   

7.
电力体制改革的不断深化,要求供电企业在电力客户工程中不得指定设计单位、施工单位和设备材料供应单位.详细说明供电企业在高压业扩工程中执行“三不指定”要求后遇到的难题,提出了具体的对策.  相似文献   

8.
厦门海底隧道海域砂层段富含水,并且受潮汐的影响属于动水,在进行高压旋喷桩施工时海水对浆液具有一定的稀释作用,造成成桩效果较差,达不到设计要求。通过现场的多次试验,对旋喷设备和注浆材料进行了改进,使高压旋喷桩在该类地质情况下可以满足加固地层和止水的作用。  相似文献   

9.
高压容器在实践运用中压力高,固所需筒体的厚度较厚.若采用单层厚板式结构,则对材料的要求高,并且要求制造厂要拥有大型的加工设备,制造难度大,再则板材的价格却随厚度增加,若采用整体多层包扎式结构,不但不存在以上材料和大型加工设备问题,而且还能避免深焊缝对容器的危害,既提高了容器的安全性又降低了生产成本.文章对单层厚板式结构和整体多层包扎式结构进行比较,阐述了多层包扎式结构在高压容器中运用的优势.  相似文献   

10.
蒸压砂加气混凝土是以硅砂、水泥、石灰等为主原料,经过高压蒸汽养护而成的多气孔混凝土,是一种性能优越的新型建材。本文重点介绍了蒸压砂加气混凝土材料的特性、建筑构造要求和施工质量控制与验收要点。  相似文献   

11.
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.  相似文献   

12.
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.  相似文献   

13.
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.  相似文献   

14.
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.  相似文献   

15.
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.  相似文献   

16.
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.  相似文献   

17.
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.  相似文献   

18.
杨明 《价值工程》2012,31(7):16-17
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。  相似文献   

19.
丛广英  乔炜君 《价值工程》2010,29(6):245-245
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。  相似文献   

20.
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.  相似文献   

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