修旧如旧重现历史灯塔百年沧桑

文中就临高历史灯塔修缮工程中的实践经验和体会,探讨我国历史灯塔在修缮保护方面的思路和方法,＂修旧如旧＂,重现历史灯塔的百年沧桑,更好地弘扬我国悠久的航标历史文化。     

Controlling road congestion via a low-complexity route reservation approach

This work introduces a novel route reservation architecture to manage road traffic within an urban area. The developed routing architecture decomposes the road infrastructure into slots in the spatial and temporal domains and for every vehicle, it makes the appropriate route reservations to avoid traffic congestion while minimizing the traveling time. Under this architecture, any road segment is admissible to be traversed only during time-slots when the accumulated reservations do not exceed its critical density. A road-side unit keeps track of all reservations which are subsequently used to solve the routing problem for each vehicle. Through this routing mechanism, vehicles can either be delayed at their origin or are routed through longer but non-congested routes such that their traveling time is minimized. In this work, the proposed architecture is presented and the resulting route reservation problem is mathematically formulated. Through a complexity analysis of the routing problem, it is shown that for certain cases, the problem reduces to an NP-complete problem. A heuristic solution to the problem is also proposed and is used to conduct realistic simulations across a particular region of the San Francisco area, demonstrating the promising gains of the proposed solution to alleviate traffic congestion.     

关于客运专线四电工程施工前预留接口工作探讨

客运专线工程是一项复杂的系统工程,是路基、桥梁、隧道、无砟轨道等站前工程与电力、电气化、通信、信号、信息等站后工程的集合体。为满足站后工程的需要,路基、桥梁、隧道、无砟轨道等站前工程的施工都必须预留工程接口,以方便电力、电气化、通信、信号、信息等四电专业器件安置、设备安装、电缆(光缆)穿越和系统保护接地需要。     

基于路径特征的自动化码头AGV自适应交通控制

针对集装箱码头双向导引自由路径环境下水平运输系统交通管理的难题,在考虑车辆物理尺寸、轨迹及行车规则的基础上,构建合理栅格单位的环境地图,建立多车多任务路径的交通控制模型,并提出一种基于路径特征的自适应交通控制方法,采用滚动调度策略和启发式策略的遗传算法进行算例试验。结果表明,相比于固定预留方法,所提出的方法以更小的区段为调度间隔,并形成自适应计划期,预留栅格数量更灵活,实现了灵活区段定义下的道路自适应预留调度并避免阻塞,提高了道路资源的利用率。     

朝鲜铁路客票发售和预订系统总体结构的设计与探讨

为了提高铁路客运运营能力和实现管理的科学化,朝鲜铁路旅客运输部门利用先进的信息技术,正在努力建设铁路客票发售和预订系统,以实现铁路运输的信息化、科学化.为此,本文借鉴中国建设铁路客票发售和预订系统的思想和经验,充分考虑朝鲜铁路客运业务的要求,对该系统的总体结构、网络结构和层次结构进行了设计和探讨.     

关于专车平台服务性质及监管必要性的探讨

要对网络专车进行有效监管,前提是明确专车平台的运输服务性质。在分别从专车的交易性质、运行特征、法律责任等方面探讨专车服务性质和监管影响的基础上,明确了专车平台不是信息中介,而是在提供运输服务,并从法律角度得出专车现有的契约形式安排是监管套利的结论。最后结合国际主流做法,从社会法治、行业利益角度提出了政府部门尽快按运输服务建立专车监管体系的必要性。     

客运专线站后预留接口施工管理与控制技术

结合武广客运专线站前接口施工实践,总结了客运专线站后综合预留接口施工关键工序控制措施及施工要点。     

铁路综合移动通信网组网关键技术分析与研究

针对铁路综合移动通信网的组网存在的很多难题,根据以往的GSM组网技术难以解决铁路通信网组网存在的特有问题,概述铁路综合移动通信网的发展和组网技术,分析铁路通信网组网独特的特点和存在的特有难题,结合这些特点提出了解决办法;然后,重点阐述这些组网技术对现有铁路业务的适应性,以及其对未来发展铁路业务发展的支持性;着重分析和研究铁路通信网组网的关键技术问题与策略。     

大城市应该控制出租汽车总量

针对中国新出现的专车服务所引起的有关出租汽车的争论,从大城市交通发展总体战略和交通政策的角度,论述出租汽车和专车服务的性质以及在城市交通系统中的功能定位。阐明专车服务属于出租汽车服务范畴,大城市应该控制出租汽车总量。从三方面提出出租汽车发展策略:适度提高出租汽车价格,建立多层次价格体系;加快出租汽车行业改革,满足不同层次的交通需求;不断提高公共交通、步行和自行车交通服务水平,以降低出租汽车出行需求。     

Auction-based highway reservation system an agent-based simulation study

Based on previous studies of a highway reservation system, this paper proposed an auction-based implementation, in which the users can bid for the right to use a route during a certain period of time. This paper models the auction system with MATSim using an agent-based simulation technique. The agents adopt their own bidding logic in the auction, and the price converges after around 130 iterations, when the number of users using the reserved highway and the total collected revenue become stable. When the overall demand changes, the collected revenue ranges from 5 to 11 dollars per user, and from 0.7 to 1.5 dollars per mile. The auction system can transfer more consumer surplus to the toll road operators, since it is a personalized tolling mechanism. The users are using the reservation system as insurance of a guaranteed congestion-free travel. The auction-based highway reservation shows great potential as a new traffic management system.