现代有轨电车工程技术经济指标研究

现代有轨电车工程是一项复杂的系统工程,专业多、涉及面广、投资大,不同项目技术经济指标差异较大,已完项目造价指标为0.8~2.3亿元/正线公里,预计该指标每年将以6.2%的增长率继续增长。本文从天水市有轨电车示范线一期工程项目入手,同时参考国内其他有轨电车工程,通过分析各项目的初步设计概算数据,对现代有轨电车的投资构成及造价进行分析,为项目规划及可研阶段编制投资估算提供参考。     

A game model of international trade,transport costs,invasive species,and protocol compliance

We study the duopolistic interaction between two monopolists located in two different countries who sell an imperfect substitute good in two markets. The traded good is transported between the two nations on ships using solid wood packing materials (SWPMs) and hence the presence of one or more invasive species is a problem. We use a game model to analyze this interaction in three steps. First, we study the benchmark case of autarky or no trade between the two nations. Second, we introduce transport costs and then study the effect of free trade on the profits of the two monopolists. Finally, we suppose that invasive species are present in the SWPMs. This fact requires compliance with an environmental protocol. We model this compliance by increasing the transport costs associated with trade and then demonstrate that a version of the so called Porter hypothesis holds. In other words, we show that compliance with a cost increasing environmental protocol can give rise to higher profits for the two monopolists under consideration.     

Health externalities of ship air pollution at port – Piraeus port case study

This paper is employing the well-known methodology of impact pathway approach to assess the external costs in human health from ship air pollution at port areas. The passenger port of Piraeus, Greece is the scenery of the study. Piraeus port is in the vicinity of the greater Athens metropolitan area where almost half of the country’s population lives. Hence, this port is the central hub of the Greek coastal passenger ship system which connects the islands of the Aegean Sea with land and is characterized by heavy ship traffic. The case study presented in this paper assesses the annual external cost in human health from air emissions produced by all passenger ships and cruise ships calling the port of Piraeus. Health cost from ships at port has been estimated at both local (Athens metropolitan area) and regional level (entire territory of Greece). Results show that higher costs occur at the local level. The dominant pollutants creating this cost are particulate matter (PM_2.5, and PM₁₀). Overall, the results indicate that the health impact of Piraeus’s passenger port emissions is not negligible; however the cost of PM₁₀ is considerably lower than the corresponded cost deriving from the land based industries of the Athens regional area for which comparison has been available.     

The development of a decision making framework for evaluating the trade-off solutions of cleaner seaborne transportation

The general rise in marine fuel prices in combination with ever-more stringent environmental regulations resulting from IMO conventions and EU Directives have become the main industry drivers for seaborne transportation to become cleaner and more energy efficient. Compliance with existing and soon-to-be-enacted regulations requires evaluating the trade-off between often-conflicting options to select the best available technology or fuel source. Although the traditional way of dealing with this issue has been to apply a cost benefit analysis, this kind of analysis does not adequately consider the complexities of the problem, such as incorporating linguistic preferences or interrelations amongst attributes, experts and their preferences.The challenge in such an analysis corresponds to that of a multiple attribute decision-making problem in which a finite number of alternatives are assessed with regards to a finite number of attributes and experts and ranked from the best to the worst.In this paper, a comprehensive and holistic decision-making framework is proposed to overcome the barriers of cost-benefit analysis techniques, facilitating the inclusion of all possible combinations of decision-making parameters and their discrete values, which will eventually help the industry achieve cleaner seaborne transportation.To demonstrate the applicability of the proposed framework, this paper focuses on a real-life study case involving an environmental compliance problem in the Port of Copenhagen, Denmark, in relation to a particular EU Directive. In conclusion, the proposed framework can be applied as a generalised decision-making model to similar compliance issues encountered within other modes of transportation such as rail and road.     

吉隆坡安邦轻轨轨道工程施工技术与装备研究

吉隆坡安邦轻轨延伸线轨道工程技术条件复杂,曲线多、半径小,应用城市轨道交通130 m小半径曲线无砟轨道施工技术与装备,解决无枕式130 m小半径曲线无砟轨道施工技术难题,总结小半径曲线轨排的组装工艺,实现复杂断面多规格道床模板的架设,高精度、高质量、高效率地完成安邦线轨道工程施工。     

集装箱全流通运输模式研究

从降低成本、节能减排的角度出发,探索一条高效率和高效益的集装箱全流通运输模式,通过举例说明此种运输模式的实际应用,提出了需要解决的问题及解决办法。     

论新铁路工程费用定额的变革

新一轮铁路工程费用定额的代表《铁路基本建设工程设计概（预）算编制办法》已经正式发布实施，它将成为今后一定时期内铁路工程设计概（预）算编制的依据。此文重点论述了新《铁路基本建设工程设计概（预）算编制办法》较原概算编制办法的一些主要变革及其特点，希望能对大家更好地使用该费用定额起到引路的作用。     

城市小汽车出行成本计量模型研究

在出行成本定义的基础上,提出了城市小汽车出行成本的构成,构建出城市小汽车出行成本各构成部分的计算模型。基于对广州市小汽车的出行成本分析计算,根据计算结果及各部分成本比例,对我国城市小汽车发展对策进行研究探讨。     

直线电机线路感应板高度调整技术探讨

感应板是直线电机线路中的重要设备，文章对感应板高度调整工作的特点进行了介绍，并进一步分析了感应板高度变化的原因，在此基础上提出了感应板高度调整工作的若干建议。     

出口加纳动车组转向架落车工艺难点及对策

针对出口加纳动车组转向架和车体结构特点,介绍了落车过程中轮重差调整方法和难点解决对策.