基于货运车辆预警数据的高速公路危险驾驶热点路段识别

本文以货运车辆车联网数据中的车辆碰撞预警、疲劳预警和超速预警数据为研究对象,针对G4高速公路北京和河北境内道路上的三种预警热点路段进行识别。运用全局空间自相关性分析方法得出三种预警数据在道路空间中不是随机分布,而是集中在某一个或几个路段上;进一步采用局部空间相关性分析方法识别出三种不同预警类型下对应的热点路段。交通管理部门可根据识别出的预警热点路段提出针对性的管控措施,有助于缓解交通事故的发生,提高货运安全水平。     

驾驶压力影响因素与识别方法研究综述

高强度的驾驶压力会对驾驶人的情绪、决策及行为产生负面影响，可能导致交通事故，并对驾驶人的健康状况造成长期影响。本文借助CiteSpace软件对驾驶压力研究进行可视化分析，进一步从驾驶人自身因素、车辆内部和外部因素这3方面总结驾驶压力影响因素，并归纳整理驾驶压力识别方法。总结发现：交通拥堵、道路复杂性及新技术使用等驾驶环境因素是引发或增加驾驶压力的主要因素；非职业驾驶人易受车辆外部环境的影响，职业驾驶人易因工作产生负面情绪，导致驾驶压力增加。驾驶压力识别主要基于主观测评量表、驾驶行为分析及生理数据分析等方法开展研究，其中，基于生理数据的识别方法因其较高的识别精度和准确度被认为在驾驶压力识别领域具有明显的优势。从研究趋势来看，未来研究需重视社会环境以及多因素叠加对驾驶压力的影响，特别关注职业驾驶人及新技术的影响，以及如何采用多模态数据融合方法实现实时监测，以提高驾驶压力识别的精度。     

九牛造生药学研究

系统研究了九牛造的原植物形态、药材性状、组织结构、粉末特征及理化鉴别，并将其与同属几种传统中药（大戟、甘遂、泽漆）进行了比较，确定了九牛造果实具稀疏平钝的疣状突起，药材茎迹明显，质坚而脆，皮层窄，薄壁细胞含草酸钙结晶及粉粒等特征。     

FAULT IDENTIFICATION IN HETEROGENEOUS NETWORKS USING TIME SERIES ANALYSIS

Fault management is crucial to provide quality of service grantees for the future networks, and fault identification is an essential part of it. A novel fault identification algorithm is proposed in this paper, which focuses on the anomaly detection of network traffic. Since the fault identification has been achieved using statistical information in management information base, the algorithm is compatible with the existing simple network management protocol framework. The network traffic time series is verified to be non-stationary. By fitting the adaptive autoregressive model, the series is transformed into a multidimensional vector. The training samples and identifiers are acquired from the network simulation. A k-nearest neighbor classifier identifies the system faults after being trained. The experiment results are consistent with the given fault scenarios, Which prove the accuracy of the algorithm. The identification errors are discussed to illustrate that the novel fault identification algorithm is adaptive in the fault scenarios with network traffic change.     

地铁车辆站名动态显示系统的设计和应用

介绍一种基于专用语音识别芯片HM2007的地铁车辆乘车站名动态显示系统,在车辆不作任何改动的基础上实现语音报站与显示的同步。     

船舶自动识别系统(AIS)装船和检验要求

IMO海安会以MSC.99(73)号决议通过的SOLAS74公约修正案,规定了船舶安装船载自动识别系统(AIS)的时间表,并于2002年7月1日生效;我国海事局2005年10月20日规定部分沿海航行船舶,必须于2006年4月30日前配备AIS。本文简要介绍了AIS设备的构成,并详尽分析了AIS装船和检验要求。     

Driver information systems — A North American perspective

Driver information systems (DIS) are considered in North America as a major category of Intelligent Vehicle-Highway Systems (IVHS), which offers to improve the efficiency and safety of driving by means of an amalgamation of information technology with vehicle and highway technologies. Traditionally North America has basic strengths in a number of information technologies that are relevant to DIS. Due to a hiatus in federal funding in the early 1980s, DIS development in North America during the past decade has emphasized autonomous systems on the vehicles until recently. The current acceleration of IVHS development in the United States has resulted from a number of converging forces and has provided the impetus for developing advanced driver information systems (ADIS) that integrates the vehicle and the highway. Large-scale demonstration and implementation of ADIS will hinge on the major legislations in the near future, and on the successful development of public-private sector partnerships in IVHS.     

直流电动机及直流调速系统的参数辨识

依据系统或环节的输入输出特性，应用最小二乘法，即可获得系统或环节手内部参数，经系统领导具结果验证，所获得的参数具有较高的精度，该方法简便易行。     

Effect of parking information on travelers' knowledge and behavior

In many urban centers the demand for parking increases sharply before Christmas mainly due to shopping activity — causing parking congestion. One way to ameliorate such congestion is by disseminating parking information. Informed drivers may divert to relatively under-utilized parking facilities relieving the pressure on congested facilities. The City of Nottingham in England tested a real-time parking information system designed to alleviate congestion in the City Center parking facilities. Real-time information was disseminated through the radio, while historical information regarding parking locations was disseminated through newspaper advertisements and leaflets. The objective of this study is to assess impacts of the parking information system on travelers' knowledge and decisions.Survey research was used to understand traveler response. Respondents' levels of knowledge regarding car parks were analyzed by developing Poisson regression models. Drivers were more likely to have greater knowledge of city center car parks if they used several information sources (radio broadcasts, newspaper advertisements or leaflets and word-of-mouth), were active seekers of parking information, and searched for parking rather than going directly to a parking facility. In addition, the study of behavior showed that drivers were more inclined to use the relatively under-utilized Park-and-Ride facilities instead of the city center car parks if they received parking information from Newspaper advertisements/leaflets. Overall, the parking information service in Nottingham was effective; it seems reasonable to establish such information dissemination and monitoring systems at parking facilities in other urban areas. Furthermore, to support informed travel and activity participation decisions, parking information should be integrated with traffic and transit information.     

铁路货车倾覆监测系统的研究

针对国内现有铁路货车监测系统已不能适应铁路运输不断发展的情况,文章提出了一种车载倾覆监测系统方案。该系统基于低速或准静态情况,通过测量和计算得到列车实时倾覆参数,以实现对铁路货车倾覆的实时监测和报警。