考虑游览船运营特征的航道通过能力评价方法

为构建客货船舶协同动态运行控制技术体系，以经典航道通过能力模型为基础，构建基于游览船运营特征(发船高峰性和航线集中度)的航道通过能力模型.根据黄浦江游览核心区船舶自动识别系统(AIS)数据，对所提出的航道通过能力模型进行实证分析.研究结果表明，本文航道通过能力模型能够较为准确地评价研究区域的实际航道通过能力.游览船发船高峰时期与现有航线规划条件下，黄浦江游览核心区航道通过能力(76艘/h)趋近饱和状态；当过境船到达超过69艘/h时，建议海事相关部门采取“错峰”航行等相关政策.     

武汉港阳逻港区多式联运发展思路

多式联运能够充分发挥各种运输方式的综合优势,对于推动物流业降本增效、完善现代综合交通运输体系具有积极意义。武汉港阳逻港区具备发展多式联运的各项要素,但缺乏对多式联运发展的系统性规划,港区多式联运发展相对滞后,综合交通优势尚未有效发挥。通过总结典型案例的发展经验,结合港区内外部综合因素,思考港区多式联运发展思路,探讨港区多式联运的布局规划以及综合服务的提升,并提出相关建议。     

Fractional-order-based ACC/CACC algorithm for improving string stability

Traffic flow optimization and driver comfort enhancement are the main contributions of an Adaptive Cruise Control (ACC) system. If communication links are added, more safety and shorter gaps can be reached performing a Cooperative-ACC (CACC). Although shortening the inter-vehicular distances directly improves traffic flow, it can cause string unstable behavior. This paper presents fractional-order-based control algorithms to enhance the car-following and string stability performance for both ACC and CACC vehicle strings, including communication temporal delay effects. The proposed controller is compared with state-of-the-art implementations, exhibiting better performance. Simulation and real experiments have been conducted for validating the approach.     

Point-to-point speed enforcement systems: Speed limits design criteria and analysis of drivers’ compliance

Point-to-point (P2P) speed enforcement is a relatively new approach to traffic law enforcement. Its technology allows vehicles whose average speed exceeds the speed limit over the controlled section to be fined. It therefore encourages compliance over distances longer than those where spot enforcement policies have been in place.In this paper, a procedure for consistently setting speed limits with such enforcement systems is proposed. Such a method has been applied to design the speed limits on two motorways in the district of Naples, Italy, where P2P enforcement systems became operational in 2009 and 2010. The speed limits, which were set using the Italian geometric design standard to assess vehicle stability and stopping sight distance, have been compared with those provided by using well-known international standards.The impact of the newly designed speed limits and of the P2P enforcement system on drivers’ speeding behaviour has been quantified for each highway section and vehicle type. In fact, accurate measurements of the average travel speeds of each vehicle crossing the enforced sections, before and after the activation of the system, were available. The migration from the old speed limits with spot speed enforcement to the new approach resulted in a notable increase in drivers’ compliance to the speed limits with a remarkable decrease in both the average of individual speeds and in their standard deviation.In addition, the analysis of 3 years of data shows that a gradual adaptation of drivers’ behaviour to the system took place. In particular, a decreasing compliance to the speed limits points to a non-optimal system management. Finally, the results of a revealed preference survey allowed us to make a behavioural interpretation regarding the significantly different impacts measured on the two motorways.     

马鞍山长江公路大桥钢塔线形控制技术

马鞍山长江公路大桥左汊主桥为（360＋2×1080＋360） m的三塔两跨悬索桥，中塔采用钢－混叠合、塔梁固结门式结构，下塔柱为预应力钢筋混凝土结构，上塔柱为钢结构，钢塔共分21个节段，首节采用浮吊安装，标准节段长6 m ，最大起吊重达235 t ，采用塔吊进行安装。为确保钢塔线形满足要求，对影响钢塔安装精度因素进行分析，形成以控制钢塔制造质量为核心、钢塔首节段安装精度为基础的线形控制流程，对钢塔节段进行工厂制造控制和现场安装控制。工厂制造控制包括零部件加工、块体制作、节段组拼、端面机加工、预拼装；现场安装控制包括首节段安装、标准节段安装、横梁与钢塔的连接。实践表明，该桥采用以控制钢塔制造精度为核心的钢塔线形控制技术进行钢塔架设施工，施工过程中钢塔制造精度和安装精度满足要求，实现了钢塔线形控制的目的。     

四川旅游资源交通系统综合布局分析

作为影响旅游活动的重要因素之一,交通布局直接关系到旅游业的发展。本文根据四川旅游资源的现状、地理位置等情况,将四川划分出三大旅游经济圈,从各旅游经济圈交通现状及客流特征入手,利用关联分析的方法,结合数据对比,剖析了各旅游经济圈与交通的关联。最后,在整合四川旅游资源的前提下,得出了四川旅游资源交通系统综合布局的相关结论。     

突发大规模需求下铁路军事运输保障研究

以"5·12"汶川地震为背景,分析了突发大规模需求下铁路军事运输保障的特点及要求,提出了应急铁路军事运输保障的具体对策,如建立健全铁路军事运输指挥机制、制订输送保障运行计划等,对铁路军事运输部门提高突发大规模需求情况下的运输保障能力具有借鉴意义.     

基于GSM短消息的木材运输码单稽查系统

为解决因网络无法延伸到达林区作业现场而无法实时荻取运输数据问题,作者应用手机短信技术研究和构建了适合于南方林区特点的县级木材运输稽查管理网络系统。本文着重分析手机短信检尺码单信息处理系统的组成、短信平台的特点与选择、信息编码的格式与计算方法,详细论述了系统软件设计方法、长短信处理技术、稽查数据的短信格式和系统运行模式．系统的应用显著提高了木材运输稽查管理水平和工作效率,有良好的推广前景。