基于复杂网络的列车辅助驾驶危险致因传播模型

为了解预期功能安全(SOTIF)相关危险致因在基于智能感知的列车辅助驾驶系统 (IATDAS)中的传播特性，提升针对该类系统的危险控制能力，本文提出基于复杂网络的IATDAS 系统危险致因传播模型。该模型在SOTIF危险致因网络的基础上，提供了全局容量-负载传播机制，能有效刻画IATDAS系统的危险致因传播机制。案例分析结果表明：本文所提模型能够解决复杂致因关系下既有模型与系统实际情况不符的问题，如对于具有较长后续传播路径的致因，本文模型能够刻画其较难导致危险的实际特征；依据本文模型实施传播控制，可以显著降低危险致因的传播速度，如对影响节点范围大、前期影响节点数量增加快的危险因素进行控制时，可使其平均传播速度降低68%，比随机控制策略多降58%。该模型可以为IATDAS系统的SOTIF相关危险控制提供决策基础。     

具有无序排列管片环结构的地铁盾构隧道数字模型智能重建北大核心CSCD

运营地铁隧道的管理、健康监测及维护正逐渐趋向于数字化、智能化;但常因地铁盾构隧道管理和检测单位缺少隧道数字模型,限制了地铁隧道智能维护和管理系统的应用和发展。文章针对地铁盾构隧道中无序排列的管片环结构,提出了一种基于深度学习和机器视觉的地铁盾构隧道数字模型智能重建方法,利用检测车获取的隧道衬砌内表面高清图片,对管片特征物(螺栓孔)进行智能识别与自动分类,再根据螺栓孔群的分布特点自动推断隧道管片环的排版规律,从而结合隧道实际线路实现隧道数字模型快速重建。某地铁隧道的实例应用结果表明,该方法适用于管片无规律性错缝拼装的情况,能以100%的准确率实现地铁盾构隧道数字模型的智能重建。     

智能船舶设计方法体系研究

根据国家两部门《推进船舶总装建造智能化转型行动计划(2019-2021年)》关于实现船舶设计、建造、管理和服务全生命周期的数字化、网络化、智能化的目标,本文通过智能船舶与传统船舶的比较,分析了两者之间的差异及其对智能船舶设计原则和方法的影响。应用现代设计技术和系统工程方法,提出了智能船舶设计原则和方法体系,供智能船舶设计人员在设计智能船舶时参考。     

Comparing smart scheme effects for congested highways

A high level objective for many international governments and local operators is that highways should be managed in a way that is sustainable in terms of a Low Carbon Energy future. Recent initiatives such as the Strategic Transport Technology Plan and the policy and legal framework promoted by the European Commissions’ Intelligent Transport System (ITS) Directive and ITS Action Plan may assist with this objective. However, many levels of complexity are inherent within the (ITS) schemes that are now part of highway management, due to the linkage of various technological components to complex systems and services. Maintaining efficient, sustainable co-operative performance is therefore a major task, with inconsistencies between product suppliers, network managers and operators. As a result, it is of considerable interest to the highway operators and high level policy makers to be able to assess the performance of individual ITS schemes and furthermore, to be able to compare performance between ITS schemes. In this paper, an illustration is provided of a methodology that can be used to assess the performance of ITS schemes according to a set of sustainability criteria. A case study is introduced which compares the performance of anticipated Active Traffic Management (ATM) schemes for what the road network operator (Highways England) perceive to be the four most congested highways in England (in terms of annual average daily traffic flows). Appropriate action can then be taken to improve the energy and sustainable management of Information Communication Technology (ICT) and transport systems for the benefit of a smarter, sustainable and efficient future.     

云计算在智能交通中的应用

随着汽车数量的迅速增长,交通拥堵日益严重。交通参与者的交通行为变得繁杂多变,交通安全问题突出,交通流预测的准确度下降。为了给用户提供时时高效的交通信息,同时为交通管理部门提供有效的交通管制措施,必须完善智能交通系统的信息采集、处理、分析、存储和发布等功能。云计算具有分布式存储、超强计算能力、信息融合共享等优点,利用云计算的这些优点,构建智能交通系统云平台,实现交通信息从采集到发布全过程的优化,最显著的是提高了交通信息的时效性和准确性。云计算已经在基于GPS的浮动车技术、短时交通流预测、最优路径诱导和交通信号控制等智能交通的各个领域得到应用,并且对综合交通的发展起到了积极的推动作用。     

交通指挥调度、事故应急处理智能化系统的设计与应用

上海公安交通指挥调度、事故应急处理智能化系统是为加强世博安全、保障世博交通而提出建设的。介绍了系统的建设目标、总体建设思路和系统总体架构,以及系统的功能特点、关键技术等。系统在实际使用中发挥了重要作用,大大提高了上海公安交通管理的整体水平。     

Autonomous vehicle control systems for safe crossroads

This article presents a cooperative manoeuvre among three dual mode cars – vehicles equipped with sensors and actuators, and that can be driven either manually or autonomously. One vehicle is driven autonomously and the other two are driven manually. The main objective is to test two decision algorithms for priority conflict resolution at intersections so that a vehicle autonomously driven can take their own decision about crossing an intersection mingling with manually driven cars without the need for infrastructure modifications. To do this, the system needs the position, speeds, and turning intentions of the rest of the cars involved in the manoeuvre. This information is acquired via communications, but other methods are also viable, such as artificial vision. The idea of the experiments was to adjust the speed of the manually driven vehicles to force a situation where all three vehicles arrive at an intersection at the same time.     

基于物元模型的公交智能调度方案评价方法

文章以物元模型为切入点,阐述了基于物元模型的公交智能化调度评价方法及算法,并通过对某高客流量线路的传统全程车调度、传统大站快车调度、公交智能化全程车调度三种调度方案的综合评价分析,验证了该方法的有效性。     

西江黄金水道智能交通调度系统

文章通过分析西江调度的背景,对航道水位和船舶吃水量进行研究,用精确的数学语言做出假设,利用综合调度的内在规律和恰当的数学工具,构造各个量(常量和变量)之间的不等式关系,求解西江黄金水道各港点的船舶签证数和船舶吃水控制,以及各梯级枢纽上下航船舶控制数值,以便对西江黄金水道进行港口、航道、船闸、船舶四位一体的综合调度。     

威志V5全新上市以进取超越期待

市场对于轿车的消费需求逐渐向理想消费阶段发展,这就对汽车的设计和制造技术提出了新的要求,天津一汽推出了威志v5这款新车来积极应对当前经济型轿车竞争激烈的形势。威志V5导入了新的“智能双I”的设计理念;在造型和内饰的细节上做了很多人性化的设计和调整;配备了很多先进技术使轿车更加节能和安全;使用自主研发的新的CA4GA5发动机更节能和环保。完全由天津一汽独立研发设计的威志v5在安全、节能、环保和新技术应用方面都为经济型轿车树立了新标杆。