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文章充分肯定了近年来我国道路运输工作取得的成绩,阐述了交通运输业今后的工作重点,提出了道路运输业发展的总体目标和要求。 相似文献
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西宁至成都铁路引入西宁枢纽总图方案研究 总被引:2,自引:2,他引:0
《铁道标准设计通讯》2016,(8):35-40
通过对西宁铁路枢纽现状及存在问题进行分析,结合在建西宁站改及相关工程项目实施,以及枢纽内曹家堡物流中心、新建编组站研究情况,提出枢纽总图布局构想。按照充分利用既有设施,点线能力协调,列车径路顺畅,客货运设施布局合理及适应城市总体发展规划要求的原则,针对西宁至成都铁路引入西宁铁路枢纽方案,根据接轨点及枢纽编组站设置位置的不同共研究了4种方案,并对方案进行综合经济技术比较,最终推荐采用高速引入海东西站,普速引入平安驿站,新设曹家堡编组站方案。 相似文献
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王玉合 《铁路工程造价管理》2012,27(1):40-41,44
在总结理论学习与实践经验的基础上,明确工程造价人员的执业范围,论述工程造价人员的成长之路、职业之路,即3种途径(学历教育、职业教育、继续教育)、3种能力(基本能力、专业能力、专家能力)、3个阶段(确定阶段、审核阶段、编制阶段)。并从不同角度对其理论意义与实践加以阐述,最后得出基础和专业知识的应用趋势是一个由应用到创造再到创新的过程。 相似文献
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Modeling heterogeneous risk-taking behavior in route choice: A stochastic dominance approach 总被引:1,自引:0,他引:1
This paper proposes a unified approach to modeling heterogonous risk-taking behavior in route choice based on the theory of stochastic dominance (SD). Specifically, the first-, second-, and third-order stochastic dominance (FSD, SSD, TSD) are respectively linked to insatiability, risk-aversion and ruin-aversion within the framework of utility maximization. The paths that may be selected by travelers of different risk-taking preferences can be obtained from the corresponding SD-admissible paths, which can be generated using general dynamic programming. This paper also analyzes the relationship between the SD-based approach and other route choice models that consider risk-taking behavior. These route choice models employ a variety of reliability indexes, which often make the problem of finding optimal paths intractable. We show that the optimal paths with respect to these reliability indexes often belong to one of the three SD-admissible path sets. This finding offers not only an interpretation of risk-taking behavior consistent with the SD theory for these route choice models, but also a unified and computationally viable solution approach through SD-admissible path sets, which are usually small and can be generated without having to enumerate all paths. A generic label-correcting algorithm is proposed to generate FSD-, SSD-, and TSD-admissible paths, and numerical experiments are conducted to test the algorithm and to verify the analytical results. 相似文献
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公交场站设施是重要的城市基础设施.本文重点探讨城市公交场站设施规划建设方面的一些问题,包括公交场站发展的规模、场站规划设置标准、场站建设模式等,并提出了相关的意见和建议. 相似文献
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考虑到宁波市林立的桥梁,较大的水域纵横连通,同时路面上的交通状况时常不理想,本文基于历史面向未来,从民众需求,政府支持,航道情况,其他兄弟城市的相关现状等角度着手,通过文献调研,问卷调查,数据分析等方式来论述宁波市发展水上公共交通的可行性. 相似文献
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In urban areas where transit demand is widely spread, passengers may be served by an intermodal transit system, consisting of a rail transit line (or a bus rapid transit route) and a number of feeder routes connecting at different transfer stations. In such a system, passengers may need one or more transfers to complete their journey. Therefore, scheduling vehicles operating in the system with special attention to reduce transfer time can contribute significantly to service quality improvements. Schedule synchronization may significantly reduce transfer delays at transfer stations where various routes interconnect. Since vehicle arrivals are stochastic, slack time allowances in vehicle schedules may be desirable to reduce the probability of missed connections. An objective total cost function, including supplier and user costs, is formulated for optimizing the coordination of a general intermodal transit network. A four-stage procedure is developed for determining the optimal coordination status among routes at every transfer station. Considering stochastic feeder vehicle arrivals at transfer stations, the slack times of coordinated routes are optimized, by balancing the savings from transfer delays and additional cost from slack delays and operating costs. The model thus developed is used to optimize the coordination of an intermodal transit network, while the impact of a range of factors on coordination (e.g., demand, standard deviation of vehicle arrival times, etc) is examined. 相似文献