排序方式: 共有71条查询结果,搜索用时 171 毫秒
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航道疏浚工程监理的思路和技术要点--长江口深水航道治理一期疏浚工程的监理实践 总被引:3,自引:3,他引:0
着重介绍长江口深水航道治理一期疏浚工程监理质量控制的技术要点,以区别于一般的疏浚工程监理,据此总结航道疏浚工程监理的技术控制要点和工作思路。 相似文献
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汽车与行人碰撞过程中的行人保护问题一直是汽车安全技术发展的一个重要课题。基于国内外行人保护法规及行人保护技术的研究现状,以汽车被动安全性为研究对象,介绍了保险杠行人保护技术、发动机罩行人保护技术、行人保护气囊及其他行人保护技术。随着技术的不断进步,我国将越来越重视行人安全保护技术。该研究为我国后续行人保护研究提供了参考。 相似文献
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1700箱集装箱船压载水系统的设计 总被引:1,自引:0,他引:1
结合我公司建造的1700箱集装箱船的情况,介绍了该船关于压载水管理系统的一种设计方法--连续换水法(BWM-F).该方法在没有对原有船体结构进行加强,没有改变原压载管布置,没有改变原压载泵的技术参数的情况下,通过对每个压载舱增加一路排舷外管达到了更换压载水的目的,满足压载水管理系统的要求. 相似文献
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欧盟强制性的客车结构安全法规2001/85/EC将于今秋生效,它是集客车结构安全法规的大成,也是国际化的客车法规范例。在制订我国客车标准和提高客车安全水平过程当中,深入理解欧盟的客车法规具有重要意义。 相似文献
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Arne Beck 《Research in Transportation Economics》2010,29(1):183-194
After decades of stagnation, the competitive market for commercial public bus transport services in Germany is beginning to move. Nevertheless, compared to the total market volume, the number of cases where competition is observable remains small. An empirical analysis of competition in the commercial services market as compared to competition in the non-commercial services market confirms that entry barriers do exist. These barriers clearly impede competitive developments in this embryonic market, which relies on the market initiatives of operators to develop. The paper identifies a key entry barrier in the institutional framework: for potential market entrants, the overall uncertainty regarding competitive procedures for commercial services is significantly higher than usual in tendering procedures. This high uncertainty poses the main disadvantage for newcomers as compared to incumbents. 相似文献
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Ramón Núñez-Sánchez Sergio Jara-Díaz 《Transportation Research Part A: Policy and Practice》2011,45(7):653-666
Because ports are conceived and designed mainly to be the transfer point of various types of freight, passengers tend to be forgotten in the analysis of port costs. In this paper first we investigate the importance of passengers in port infrastructure costs by means of a multi-output cost function estimated from 20 annual observations (1986-2005) for 26 Spanish Port Authorities. Results show that, although a passenger weights on average less than one tenth of a ton, he or she represents as much as two tons of solid bulk and about three tons of containerized general cargo in terms of marginal costs. Secondly, we compare the marginal costs of different cargoes with their price caps established by law. Results suggest that some type of second best pricing is induced by present regulation. 相似文献
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2013年9月为了保护环境,保障人体健康,防治大气污染,由中华人民共和国环境保护部与国家质量监督检验检疫总局联合发布《轻型汽车污染物排放限值及测量方法(中国第五阶段)》为国家污染物排放标准。本文对国Ⅳ标准与国Ⅴ标准的限值,与技术路线进行对比分析。 相似文献
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Didier van de Velde 《Research in Transportation Economics》2008,22(1):78-84
Authority intervention in the public transport sector has a long history and has led to a growing corps of legal texts in European countries. These texts are often divergent, if not incompatible. This was no problem until the rather recent internationalization of the sector. With this internationalization, the European Commission decided to address this issue. This chapter describes what has led to the appearance of this new Regulation and the main steps on the 10-year long road that led to the adoption of the new Regulation. The chapter also formulates some comments on the results reached. 相似文献
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对持续3个月的ISM规则世界性大检查作认真分析,对船舶管理缺陷、船舶滞留、安全文化及防污染问题提出看法及改进措施。 相似文献