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61.
轨道精调是无砟轨道施工中最关键的一道工序,它对轨道的线型最终位置能否达到设计及验标的要求起着决定性的作用。本文根据广珠城际客运专线无缝线路轨道静态调整施工作业,对采用轨检小车进行轨道静态精调作业的施工组织、设备配置运用和技术方案进行了总结和归纳,形成了CPIII的复测与平差、施工人员系统培训、精调作业、复测与二次精调的基本作业流程。 相似文献
62.
This paper has been written in response to the Viewpoint contribution by the author Button (2012) entitled: “Is there any economic justification for high-speed railways in the United States?”. In this article, the Spanish HSR high-speed rail network is used as an argument against certain HSR investments. Several of the data presented by the author are misleading and some of the information given in connection with Spain is incomplete. As the Journal of Transport Geography is widely read by policymakers and the scientific community, Button’s misrepresentation could cause serious damage. We therefore set out to clarify the data used by Kenneth Button and to explore some points in greater detail, although in no case eschewing criticism of Spain. Although excessive Spanish investment in public infrastructure over the last twenty years has probably had a negative impact on the real estate bubble, investments in HSR infrastructure in Spain have specifically been accompanied by two particular facts that need to be distinguished from other countries’ experience. These facts cannot be overlooked and will be discussed in this paper. They relate firstly to the total amount of European funds used in HSR construction and secondly to the technological and scientific innovations developed in Spain linked to the HSR market. 相似文献
63.
《Journal of Sustainable Tourism》2013,21(2):180-199
This paper uses cluster analysis, a form of a posteriori market segmentation, to understand the attitudes of tourists and the local community towards using the Looe Valley Branch Railway Line. The research revealed five segments of users distinguished by their attitudes towards using the train. Following this, the paper discusses the implications of the survey findings for attracting more people to use the Looe Valley Line. It sets its findings in the context of the sustainable tourism aims of reducing transport congestion and emissions, as well as recent work on assessing the scope for sustainable transport development in the leisure and tourism markets. 相似文献
64.
面对新线集中投入运营,高速客运专线及电气化新设备从无到有的新形势,乌鲁木齐铁路局采取"延伸管理+业务外包"的新线管理模式,确保实现安全标准、质量标准、管理标准、技术标准和作业标准"五统一",快速形成新线运输能力,有效提高全局整体管理水平。 相似文献
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66.
最低生活保障线反映了一个地区的居民维持衣、食、住、行等基本生活的最低标准,是实施最低生活保障制度的基础。文章利用扩展线性支出系统模型对当前广西城镇居民最低生活保障线进行测算,并进一步测算其在未来几年内的发展趋势。测算数据表明,当前广西实际发放的城镇居民平均最低生活保障标准比测算标准低;未来几年内,在不考虑通货膨胀情况下,最低生活保障线呈上升趋势,但增幅不大。鉴于我国目前的物价上涨较快,政府在制定政策时必须有所考量。 相似文献
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68.
Luisa Maria Tumbajoy Cardona Rosley Anholon Dirceu da Silva Robert Eduardo Cooper Ordóñez Osvaldo Luiz Gonçalves Quelhas 《Latin American Business Review》2013,14(3-4):297-321
This article aims to evaluate the production line automation projects developed by Brazilian and Colombian companies from the Project Management perspective, through the analysis of the application degree of PMBOK processes, to understand how formal techniques are being employed in these countries and also to identify improvement opportunities, when necessary. Data were collected through a survey. The similarity index between the ten processes, with the highest application degree in the Brazilian and Colombian samples, was 70%. For the processes with the lowest application degree, the similarity index was 60%. No similar study was found in the literature. 相似文献
69.
数控车床是一种具有高精度、高效率的自动化机床。其具有广泛的加工艺性能,可车削外回转表面、内回转表面、各种特型面及复杂零件等。本文主要阐述了怎样确定典型零件车削加工方案以及在加工过程中加工工序安排、进给路线的确定等方法。 相似文献
70.