结合双向光流约束的特征点匹配车辆跟踪方法

针对复杂交通场景中动态光照变化、目标尺度变化和部分遮挡等因素带来的影响,提出了一种基于特征点的稳定可靠的车辆跟踪方法.针对运动车辆高速行驶时具有较大帧间运动的特点,构造KLT算法的金字塔模型,根据前向和后向跟踪偏移量,对稳定性较差的特征点进行剔除.同时,采用SURF特征匹配算法对目标特征点集进行更新和校正.最后,利用特征点之间的位置信息,确定目标的尺度和旋转变化因子,从而实现当前帧中目标区域的定位.实验结果表明,提出的车辆跟踪方法可以有效地解决复杂场景中目标形变和部分遮挡等问题,对尺度和旋转变化也具有较强的鲁棒性.     

An assessment of UK drivers’ attitudes regarding the forthcoming ban on the sale of petrol and diesel vehicles

The purpose of the study was to predict how drivers of petrol or diesel cars might vote in a ‘Yes/No’ referendum concerning the UK government’s decision to ban from 2040 onwards the sale of all new non-electric vehicles. Five main factors were hypothesised to influence voting intention: a person’s (i) level of environmental concern, (ii) attitude towards electric cars (measured via an Implicit Association Test), (iii) belief about the importance of air pollution, (iv) driving requirements, and (v) reaction to the cost of the ban to the individual (assessed using a contingency valuation approach). The study also examined possible determinants of attitudes to electric vehicles, e.g., whether an individual was a ‘technology enthusiast’, had prior knowledge of and searched for knowledge about electric vehicles, and whether a person had played an online game where the player assumed the identity of an electric car driver. A structural equation model was developed and tested on a sample of 675 UK drivers, none of whom had ever owned or driven an electric car. The results suggested a good fit of the model to the data, except that neither environmental concern nor belief in the importance of clean air affected attitude to electric cars. Also, high levels of environmental concern did not motivate people to search for knowledge about electric vehicles. Social marketing campaigns that will be needed to precede the ban should focus on its health benefits, and not target particular age groups, gender, or whether a participant had children.     

传感器与检测技术实验课教学改革构想

为了强化学生实践动手能力培养,全面提升应用型工程人才培养质量,本文分析了传感器与检测技术课程实践教学的现状,揭示了存在的共性问题;调查分析了不同类型高校该课程的内容体系及学时分配情况;提出了"更新实验教学内容、搭建综合实验教学平台"等改革构想。     

Workshop 5: Network and system planning

A renewed interest in public transport analysis and development has triggered a debate among policy makers, practitioners and stakeholders regarding technologies, design, pricing, subsidies and contract forms for optimal policy, including social well-being and the financing of public transport reform. Here we present contents and conclusions of workshop 5 of the Thredbo 12 Conference held in Durban, South Africa, where we analysed a series of recent theoretical developments on the links among demand, technology and the design of public transport systems, which we coupled with the examination of several case studies in order to feed the discussion regarding the relations among the strategic, tactical and operational elements that should be considered when designing a public transport policy.     

智能型铁路信号电源技术定义和分类

由于近几年智能型铁路信号电源技术发展较快,技术比较复杂,产品型号、种类繁多,使设计单位和使用单位在产品选型上出现了困难。本文对智能型铁路信号电源技术进行了定义和技术分类、性能比较。以便使设计和使用部门能比较全面的了解智能型铁路信号电源的新技术,达到在设计中正确选型的目的。     

6LowPan技术分析

6LowPan，即IPv6over IEEE 802．15．4，为低速无线个域网标准。IPv6作为网络层互连方案，6LowPan技术引起了广泛的关注。为此，介绍基于6LowPan技术，讨论技术优势，分析关键技术，重点介绍其在智能家居无线网络中的应用，对其应用前景进行展望。     

珠江水系3OOO吨级江海直达货船船型特点

本文针对珠江水系的经济环境及水运条件，介绍了3000吨级江海直达货船的船型特点，并介绍了在设计中需着重考虑的一些问题。     

地铁地下式停车场的设计特点分析

国内地铁停车场占地普遍较大,随着城市的发展,城区内进行停车场的选址已经成为制约地铁建设的重要因素之一。提出建设地下式地铁停车场的必要性,并结合地下停车场工程特征从设计原则、停车场占地、工艺布置、室内外消防及排水、房屋建筑设计等方面分析建设地下停车场的设计特点,并从集约利用土地资源的角度分析建设地下停车场存在的问题及应对措施。研究结果为停车场运用库及辅助生产房屋、综合维修设备房屋易设在地下,乘务员公寓及食堂建议设在地面;消防设计要在前期设计时与当地消防主管部门沟通。研究结论为后续地下停车场或车辆段工程设计提供参考依据。     

船闸阀门技术状况及部件磨损原因浅析

针对我处各船闸维修情况实例,对船闸阀门目前技术状况及各部件磨损原因进行分析和探讨。一些体会可供参考,所提的技术要求和问题也有一定现实参考价值。     

轨道移动式连续装船机电气系统的研制

介绍上海外高桥粮食储备码头1200t／h轨道移动式连续装船机的研制情况，分析和探讨其电气系统在设计、制造及调试中遇到的问题及处理方法，阐述连续装船机电气系统的关键技术。