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1.
孙海波 《中小企业管理与科技》2009,(10)
桥梁转体施工是指将桥梁结构在非设计轴线位置制作(浇注或拼接)成形后,通过转体就位的一种施工方法.它可以将在障碍上空的作业转化为岸上或近地面的作业.根据桥梁结构的转动方向,它可分为竖向转体施工法、水平转体施工法(简称竖转法和平转法)以及平转与竖转相结合的方法,其中以平转法应用最多.本文论述了桥梁施工工艺的特点、工艺流程及施工方法,认为此工艺为东北地区填补了桥梁转体施工的空白. 相似文献
2.
杨绪广 《中小企业管理与科技》2013,(4):128-129
本文通过从原理上对转体施工方法进行分析的基础上,对转体原理、施工工艺、技术措施等角度对转体施工方法中的平转法进行阐述,提出转体施工方法在桥梁工程中的应用。 相似文献
3.
郭广山 《中国高新技术企业评价》2014,(14):96-98
最近几年,在进行铁路客运的专线建设时,需要运用平转法的转体施工来处理连续梁跨越铁路的情况,在连续梁方面,大多数具备平面的曲线半径相对较小、转体的重量相对较大以及跨度相对较大等特点。因此,要计算以及分析转体结构中关键的环节以及部位,同时充分地研究平面的曲线对转体的结构产生的影响。文章结合青荣城际铁路即墨上行联络线跨胶济铁路转体桥施工中平转法的转体应用进行简单分析。 相似文献
4.
徐兴男 《中国高新技术企业评价》2008,(22):254-254
钢管混凝土拱肋施工是一个复杂的过程,也是钢管混凝土系杆拱桥施工过程的关键工序。本文对钢管混凝土拱桥施工的支架施工法、缆索吊装法、平转法、竖转法进行了简单的介绍。 相似文献
6.
通过对中宁县石碱公路上跨包兰铁路立交转体桥的称重实验分析,在转体梁施工最重要的环节(转体梁施工称重平衡)开展工作。通过测试转动体部分的不平衡力矩、偏心距、摩阻力矩及摩擦系数等参数,实现桥梁转体的配重要求,为该桥转体施工的指挥和决策提供依据。也为类似转体桥梁的设计和施工积累经验和数据,达到进一步完善桥梁水平转体施工方法、提升企业施工技术能力的目的。 相似文献
7.
刘碧萍 《中国高新技术企业评价》2009,(7)
"平面转体施工法"主要利用桥梁两边的地形,首先采用支架将主梁对称、分段在两边现场浇筑,然后借助铺有四氟乙烯板和不锈钢板的环形滑道,应用千斤顶的定推力,平面转体0或者180°左右(梁式桥为90°,单跨拱桥为180°)合拢,最后再进行合拢段的施工,完成体系转换的一种施工方法。 相似文献
8.
在公路先简支后联续桥梁施工中,由于没有充分考虑桥面横坡、平曲线、竖曲线的综合影响,将会对桥梁产生很不利的影响,文章从这些因素出发提出了解决措施。 相似文献
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11.
Tim Power 《Revue internationale de statistique》2003,71(1):59-67
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
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.
Value at Risk in the Suburbs: Eminent Domain and the Geographical Politics of the US Foreclosure Crisis
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Christopher Niedt Brett Christophers 《International journal of urban and regional research》2016,40(6):1094-1111
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.
Christian Busch 《Journal of Management Studies》2024,61(3):1110-1151
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.
Mohammad Mohabbat Khan 《Public Management Review》2013,15(2):267-278
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.
Chris Rowley John Benson Malcolm Warner 《International Journal of Human Resource Management》2013,24(4-5):917-933
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.
John Pullinger 《Revue internationale de statistique》1997,65(3):291-308
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.
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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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.
Mark S. Leclair 《Economic Systems Research》2002,14(2):147-156
This paper examines the effect that export composition had upon manufacturing employment in the US during the 1991 recession. Although it takes, on average, approximately $66 000 in exports to create one job, the exact gains in terms of total employment depend upon the labour-intensity of the products being exported. Foreign sales by the chemical and textile industries result in a far greater increase in employment than exports by the petroleum refining or steel industries. This analysis estimates the employment effects of manufacturing exports over the 1989-95 period, utilizing an input-output model to capture both direct and indirect effects. The results demonstrate that export composition has, at times, both strengthened and reduced demand for labour. Consequently, if job-creation is a national goal, it may be in the interests of the US to promote exports from sectors that are labour-using. 相似文献