共查询到20条相似文献,搜索用时 31 毫秒
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首先从模块化产业链的视角分析了城市轨道交通设计行业总线模块化结构;描述了知识结构和知识分工的方式,进而对城市轨道交通设计行业的知识整合模式进行了剖析;探讨了知识整合模式运作的知识竞争、知识创新、组织结构等因素;形成了较为全面的城市轨道交通设计行业知识整合思路。 相似文献
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我国幅员辽阔,各地区地理环境及气候条件复杂多样,且地域间经济发展不平衡,而交通运输行业在国民经济发展中均发挥至关重要的作用,因此道路运输装备的选择关系到当地的运输能力的发展,在碳达峰及碳中和的目标下道路运输装备的节能减排技术不断涌现.本文分析了我国不同地域的环境及地理条件,发现在不同动力类型道路运输装备的选择上应该因地制宜进行合理的配比.基于环境条件科学合理地配置多动力类型道路运输装备的比例,不仅有利于促进实现碳达峰及碳中和的国家战略,还有利于促进我国交通运输行业与国民经济高质量配合发展以及能源安全发展,保障极端天气、紧急救援时的运力需求,减少因不科学选用新能源车辆造成的经济浪费及特殊条件下的运力不足.研究发现经济效益提升、污染防治、特殊条件下基础运力保障三者的相互协调,是未来我国全域发展高效、节能、运力保障的最基本最智慧的发展路径,是尽早实现我国公路运输碳达峰的有效方法. 相似文献
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道路清障救援车辆动态监管是道路清障救援行业管理的重要环节和手段,通过掌握清障救援人员和道路清障车辆的实时动态,及时纠正道路清障救援过程中的违法违规行为.本文提出道路清障施救牵引行业动态监管需求,涵盖了行业动态监管需求和第三方监控要求,以期推进道路清障救援车辆第三方监管平台建设与应用,提升道路车辆清障救援服务水平. 相似文献
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开展水土流失监测是水土保持监管的重要手段。文章以广西沿海高速公路改扩建工程一期工程水土保持监测实践为例,分析了工程建设水土流失特点,介绍了水土保持监测技术和方法,并通过对工程实例监测结果的分析评价,提出了水土保持监测工作中易出现的问题及相应的解决方案。 相似文献
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Caspar G. Chorus 《Transportation Research Part A: Policy and Practice》2012,46(7):1003-1012
This paper studies to what extent the Logsum-measure of user benefits relates to travelers’ perceptions of choice set-desirability and choice-satisfaction. Knowing these relations is important since researchers have recently started to analyze and interpret user benefits in general – and Logsums in specific – in terms of these more behaviorally oriented notions, rather than in terms of expected utility. Participants to a stated route choice experiment were asked to indicate, after each choice made, to what extent they considered the choice set to be desirable, or to what extent they were satisfied with the chosen alternative. These measurements were correlated with Logsums that were computed for each choice situation. In addition, the paper derives a regret-based Logsum (which gives the expected regret of a choice situation) and presents a comparison with its utilitarian counterpart. Also for this regret-based Logsum, correlations with desirability- and satisfaction-ratings are computed. As a general finding, it appears that all computed correlations are rather weak. This suggests that, at least in the context of our data, the utility-based Logsum and its regret-based counterpart appear to have only a fairly weak connection with the behavioral notions of choice set-desirability and choice-satisfaction. 相似文献
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通过研究汽车与船舶的油耗特点,结合燃油种类与CO_2排放量的关系,建立了计算公路运输与水路运输单位耗油量与单位CO_2排放量的数学模型。通过敏感性分析,研究车速或航速与载货率对车辆或船舶单位CO_2排放量的影响。以从厦门港到盐田港的干散货运输为例,做了节能减排计算分析,并将结果与用其他方法获得的结果对比。在此基础上,对公路运输与水路运输节能减排做了敏感性分析研究,可以计算出能够体现水路运输节能减排优势的临界货运量。结果表明本文中介绍的方法能够为核算、比较公路运输与水路运输的节能减排效果提供更科学的量化参考。 相似文献
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Recent years have shown a rising popularity of the concept of resilience—both theoretically and empirically—in complex systems analysis. There is also a rising literature on resilience in the transport and spatial-economic field. The pluriform interpretation of resilience (e.g., engineering vs. ecological resilience) is related to methodological differences (e.g., stability in dynamics vs. evolutionary adaptivity). But in all cases the fundamental question is whether a complex system that is subjected to an external shock is able to recover, and if so, to which extent. The present paper [Based on presentation from cluster 6 (Accessibility) of the Nectar 2015 conference in Ann Arbour, USA.] aims to add a new dimension to resilience analysis in spatial systems, by addressing in particular the relationship between spatial accessibility at a municipality level and the resilience outcomes of the spatial system concerned. It does so by investigating to which extent accessibility of Swedish and Dutch municipalities has mitigated the local shock absorption from the recent economic recession. In our study the shock absorption capacity of municipal accessibility is estimated by analysing the relevant resilience indicators for the period concerned. In this context, conventional resilience indicators based on either multivariate complex data (in particular, the Foster Resilience Capacity Index) or employment data (in particular, the Martin Resilience-Employment Index) are confronted with spatial connectivity data based on local accessibility measures, so that geographical mobility may be regarded as one of the shock-mitigating factors. The empirical analysis is carried out for two countries which have both proven to be rather shock-resistant during the recent economic crisis, viz. Sweden and The Netherlands. Clearly, the geographical structure of these countries forms a sharp mutual contrast, viz. a spatially dispersed economy with a few distinct urban concentrations versus a spatially dense economy with one major metropolitan centre (the Randstad), respectively. Our experiments are carried out for the 290 municipalities in Sweden and 40 COROPs in The Netherlands. Our research findings show relevant and new insights into differences in the local recovery potential in Sweden and The Netherlands. 相似文献
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隧道及地下工程结构防排水技术的发展和应用 总被引:4,自引:0,他引:4
文章总结了大瑶山隧道修建以来其复合式衬砌结构防排水试验研究和应用情况,介绍了塑料防水隔离层的防水机理及各种防水型式的优缺点,提出了改进建议. 相似文献
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