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1.
光固化成型工艺又称立体光刻成型,是通过计算机控制紫外激光使光敏树脂固化并逐层凝固成型的快速成型工艺方法。该工艺是快速成型技术中出现最早、应用最广泛、工艺最为成熟的技术工艺。文章对光固化成型工艺的基本原理、特点及其应用进行了探讨,并对影响成型精度的因素进行了分析,进而对光固化成型工艺的发展前景提出了展望。  相似文献   

2.
与传统的PE吹塑风管相比,汽车轻量化XPE吸塑风管有减重80%、降噪、防结露、装配柔性等优点,在新能源汽车行业的应用越来越广泛。文章主要介绍了汽车轻量化空调风管的应用、产品设计、模具设计方法和注意事项、生产工艺及成型过程中常见的缺陷和解决方法。  相似文献   

3.
伍兹物料周转用品(苏州)有限公司(简称伍兹)是乔治伍兹股份有限公司在中国的分公司.乔治伍兹股份有限公司为乔治伍兹家族的控股企业,乔治伍兹家族于1947年在苏梨士开始模具的生产,至今已有60多年历史.其2005年进入中国,在苏州成立了有限公司.伍兹的生产基地遍布瑞士、德国、波兰、英国和法国.其业务范围包括物流咨询、项目管理、研究和设计、快速成型、设计和模具生产等.其产品通过先进的计算机控制的注塑机生产,产品的重量下限可低至10克,上限可达到35公斤.产品分为注塑和吸塑两类,注塑产品主要有周转箱、托盘、吸塑盘和技术塑料制品等;吸塑产品有工具盘、盖子等.  相似文献   

4.
文章阐述了发展汽车车身冲压成型工艺与模具技术的重大意义、国内外发展现状及研发热点,并对发展轻量化车身成型工艺与模具技术的目的、意义、主要研发内容、市场需求等情况进行了分析。  相似文献   

5.
随着复合材料性能的不断改善,其成型工艺也在不断的变化。现对复合材料的复合材料的RTM成型工艺、拉挤成型工艺、SMC/BMC模压成型工艺等进行了分析。  相似文献   

6.
文章针对传统货检作业模式下的作业流程及目前作业层中存在的问题,研究和开发货检手持机系统。货检手持机集拍照、对讲、网络访问于一体,通过无线网络获取货检作业列车、车辆及编组信息,并将作业结果数据信息及时传输到货检监控平台。该系统的应用提高了柳州南车站货检作业的质量,降低了货检作业人员的劳动强度,使货检工作的管理水平得到进一步提升。  相似文献   

7.
模具是制造业的重要工艺基础,在我国模具制造属于专用设备制造业。汽车防尘罩是典型的冲压成型零件,分析其外形特征,需要冲裁、拉深两种工艺才能成型。本文分析了汽车防尘罩的零件工艺特征,制定了成型工艺,利用复合模完成零件的成型,不但提高了加工效率而且保证了零件的尺寸精度。  相似文献   

8.
文章叙述了车轮轮辐的冲压过程,其中着重分析了车轮轮辐侧孔的成型工艺。设计了侧孔的成型模具,并介绍了模具的工作原理和主要部件的结构特征,充分展示了分度机构的特点,动作可靠、生产效率高、工艺质量好且便于实现自动化。  相似文献   

9.
影响钣金零件成型的性能指数主要有n、r值。文章主要介绍了板料成型性能指数n、r值对钣金零件成型的影响,通过结合典范成型工艺,运用钣金的冷压成型原理进行n、r值的详细分析与研究,总结出成型工艺的相关规律性结论,为钣金成形工艺提供一些指导性建议。  相似文献   

10.
文章针对传统货检作业模式下的作业流程及目前作业层中存在的问题,研究和开发货检手持机系统。货检手持机集拍照、对讲、网络访问于一体,通过无线网络获取货检作业列车、车辆及编组信息,并将作业结果数据信息及时传输到货检监控平台。该系统的应用提高了柳州南车站货检作业的质量,降低了货检作业人员的劳动强度,使货检工作的管理水平得到进一步提升。  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.
Based on a review of established U.S. management journals (1995–2003), six schools of thought are identified within the Anglo-American M&;A research: “Capital Market”, “Principal/Agent”, “Industrial Organization”, “Organizational Behavior”, “Human Resources” and “Strategic Management”. The literature review shows that the definition of M&;A success, the methods applied, and insights from empirical research differ according to the respective school of thought. Empirical studies focus on the resource combinations of merger partners, the specific circumstances of merger negotiations, and on integration management as antecedents of merger performance. Unfortunately, empirical findings have not yet provided reliable explanations for M&;A success. Based on the current state of Anglo-American M&;A research, the authors discuss implications for business practice, identify research gaps, and propose areas for future research.  相似文献   

17.
We examine the general equilibrium repercussions associated with the introduction of new technologies, using the generalized Leontief system that allows technological substitutions. We show that an untested introduction of cost-increasing technologies in any industry may result in creating a non-productive technological structure that does not satisfy the Hawkins-Simon condition, following the autonomous dynamic adjustment process with structural transitions in the economic system. Therefore, we propose a practicable control scheme of introducing cost-increasing technologies that strictly avoids the creation of non-productive structures in all periods of structural transition, using the available information on the ex ante technological structure.  相似文献   

18.
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   

19.
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   

20.
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   

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