公交优先下城市出租汽车市场进出机制研究

准入与退出是出租汽车市场运营管理的源头环节。在公交优先及政府对准入退出实行管制的前提下,本文对公交优先下的出租汽车市场进行了定位,探讨了政府调控要素中的准入规模、准入主体、经营模式以及服务质量等内容,论证了以服务质量招投标为主体的准入模式是适合现阶段我国城市出租汽车行业发展要求的,并提出了具体的前提条件和实施要素;同时对出租汽车市场的退出机制进行了研究,提出了基于GDAHP法（Group Decision AHP）和加权积法的出租汽车市场退出决策流程、退市途径、退市层次以及相应的保障措施等内容。     

我国商用汽车电子产业现状及发展方向

在介绍国内外汽车电子应用水平和市场前景的基础上,分析汽车电子技术的发展趋势,提出我国近阶段汽车电子产品的研发方向。     

北京局集团公司铁路专用线发展对策探讨

铁路专用线作为大宗货物运输"最后一公里"的起讫点承担着铁路和企业的纽带作用.从专用线分布情况及专用线到发运量方面分析北京局集团公司专用线现状,阐述影响专用线发展的因素,研究提出专用线功能由"为企业服务"向"为社会服务"转变、利用市场机制优化专用线改扩建手续、引导企业完成专用线扩能改造、对无运量专用线进行分类管理、建设现...     

2010年上半年我国汽油机市场分析及下半年市场展望

文章介绍了2010年上半年中国车用汽油机市场发展概况,分析了汽油、柴油机增长贡献度,不同排量汽油机产量增长情况。文章还介绍了产量位居行业前10名的企业的产销情况,增长因素,拉动增长的主要机型。对2010年上半年中国车用汽油机市场发展特点进行了分析,并且介绍了一些主要新机型,并对2010年下半年及全年产销进行了展望。     

青草沙水库及取水泵闸工程砂源选择及开采设计

青草沙水库及取水泵站主体工程战线长、施工期短、用砂量庞大。其施工阶段砂源选定和开采方式对工程的顺利推进、工程造价的控制均有直接和重要的影响。该文介绍了在初步设计阶段,结合库区及周边砂源特点,对库区砂源开采区进行的总体划分,并进行了开采和供砂方式设计。     

迎接中国汽车市场“第6次扩张期”

中国汽车市场是按波动规律发展的,30年来已发生了5次波动。文章采用“车市波动分析法”研究中国汽车市场发展趋势后认为：2009年上半年车市走出“谷底”,下半年平稳回升,结束“第5次波动期”,2010年中国车市进入“第6次扩张期”。文章阐述了“第6次扩张期”的新特点和新要求,并提出了加强宏观调控,使车市按波动规律稳健快步发展的新思路。     

The 2008 New Zealand public transport management act: Rationale, key provisions, and parallels with the United Kingdom

In January 2009, following a lengthy industry review and consultation process, the New Zealand Public Transport Management Act (PTMA) came into force. The Act allows Regional Transport Authorities, as the primary procurers of public transport services, to place either a control or a contracting requirement upon services that are registered as commercial requiring no subsidy. The imposition of either the control or the contracting requirement is designed to facilitate greater system integration, improve service continuity and enhance services to the customer, andallow the Authority to invest in key strategic projects, such as integrated fares and ticketing, so as to grow patronage.The PTMA’s other objective is to ensure improved value for public subsidies. Recent years have seen significant subsidy inflation for seemingly little commensurate benefits. The Act will allow the Regional Transport Authority to achieve greater value for money through improved farebox, a shift to longer, larger contracts to increase competition in the market, a more appropriate allocation of risk, and the removal of the ability of operators to ‘game’ the current system by using strategically placed commercial services as barriers to competition.Similar concerns have also stimulated new legislation in the UK and this paper illustrates the parallels in the environment and proposed response.     

加入WTO后对我国船舶工业的影响及应对

该文介绍了世界造船业和我国造船业的现状 ,分析了我国加入WTO后对我船舶工业的影响及所面临的挑战 ,并提出了一些应考虑的意见。     

A control theoretic formulation of green driving strategies based on inter-vehicle communications

Various green driving strategies have been proposed to smooth traffic flow and lower pollutant emissions and fuel consumption in stop-and-go traffic. In this paper, we present a control theoretic formulation of distributed, cooperative green driving strategies based on inter-vehicle communications (IVCs). The control variable is the advisory speed limit, which is designed to smooth a following vehicle’s speed profile without changing its average speed. We theoretically analyze the performance of a constant independent and three simple cooperative green driving strategies and present three rules for effective and robust strategies. We then develop a distributed cooperative green driving strategy, in which the advisory speed limit is first independently calculated by each individual vehicle and then averaged among green driving vehicles through IVC. By simulations with Newell’s car-following model and the Comprehensive Modal Emissions Model (CMEM), we demonstrate that such a strategy is effective and robust independently as well as cooperatively for different market penetration rates of IVC-equipped vehicles and communication delays. In particular, even when 5% of the vehicles implement the green driving strategy and the IVC communication delay is 60 s, the fuel consumption can be reduced by up to 15%. Finally we discuss some future extensions.     

Stochastic dynamic switching in fixed and flexible transit services as market entry-exit real options

The first analytical stochastic and dynamic model for optimizing transit service switching is proposed for “smart transit” applications and for operating shared autonomous transit fleets. The model assumes a region that requires many-to-one last mile transit service either with fixed-route buses or flexible-route, on-demand buses. The demand density evolves continuously over time as an Ornstein-Uhlenbeck process. The optimal policy is determined by solving the switching problem as a market entry and exit real options model. Analysis using the model on a benchmark computational example illustrates the presence of a hysteresis effect, an indifference band that is sensitive to transportation system state and demand parameters, as well as the presence of switching thresholds that exhibit asymmetric sensitivities to transportation system conditions. The proposed policy is computationally compared in a 24-hour simulation to a “perfect information” set of decisions and a myopic policy that has been dominant in the flexible transit literature, with results that suggest the proposed policy can reduce by up to 72% of the excess cost in the myopic policy. Computational experiments of the “modular vehicle” policy demonstrate the existence of an option premium for having flexibility to switch between two vehicle sizes.