武汉城市快速环路智能交通业务通信主干传输网建设探析

武汉城市快速路网呈＂环＋放射＂的结构,为提高交通通信业务主干传输网络的可靠性和稳定性,提出了基于武汉市快速环路的智能交通业务通信主干环网的建设方案。该方案根据武汉市路网形态,围绕快速路网环线构建通信主干环网,结合基于SDH的多业务传输平台和自动交换光网络2种平台,共同为智能交通系统提供安全可靠的通信平台。     

城市干路接入口管理及评价技术研究

针对我国城市干路接入口管理现状，分别从宏观、中观及微观层面，研究适合我国国情的接入口管理技术策略，并进行实用性对比分析。在此基础上，为综合评价干路接入口管理效果，确立了延误的评价指标，并针对城市干路接入口混合流中的非机动车和行人，提出了“非直线延误”的新概念及计算模型。     

交通干线相邻交叉口动态协调控制研究

建立了交叉口交通流的动态模型,基于该模型实现了交通信号相位的动态配时,提出了一种考虑双向绿波的干线相邻交叉口相位差优化控制方法,并采用改进的遗传算法(GA)进行求解,从而实现交通干线分级递阶协调控制,避免了交通拥挤和堵塞。以济南市经十路干线交叉口为对象,选择不同时段的车流量数据进行仿真研究,仿真结果表明,本文提出的控制方案能够有效地减小车辆排队长度,从而提高干线交通畅通,降低车辆平均延误时间,是进行城市交通干线控制有效且实用的方法。     

区域干线公路安全现状调研及特征分析

针对江西省内区域各干线公路技术标准参差不一,差异较大,安全设施少,地形条件复杂,混合交通严重,交通事故率较高的现状,为提高区域干线公路道路安全水平,结合吉安地区干线公路(G319、吉莲线、敦永线)进行文献调研和现场调研,包括交通运营情况调查、交通事故调查、道路条件调查等.通过收集各方面数据,为江西吉安地区的地区特点、交通特征以及该区域干线公路交通事故特点提供了较为全面的基础性资料和初步分析结论.     

A novel arterial travel time distribution estimation model and its application to energy/emissions estimation

Arterial travel time information is crucial to advanced traffic management systems and advanced traveler information systems. An effective way to represent this information is the estimation of travel time distribution. In this paper, we develop a modified Gaussian mixture model in order to estimate link travel time distributions along arterial with signalized intersections. The proposed model is applicable to traffic data from either fixed-location sensors or mobile sensors. The model performance is validated using real-world traffic data (more than 1,400 vehicles) collected by the wireless magnetic sensors and digital image recognition in the field. The proposed model shows high potential (i.e., the correction rate are above 0.9) to satisfactorily estimate travel time statistics and classify vehicle stop versus non-stop movements. In addition, the resultant movement classification application can significantly improve the estimation of traffic-related energy and emissions along arterial.     

城市结点处干线公路互通式立交选型研究及实例分析

城市结点处的干线公路互通式立体交叉,选型时影响因素较多,需要对方案进行综合比选,使立交型式在满足干线公路功能的同时,兼顾与城市交通的衔接转换,并与用地条件和城市景观相协调。     

颈外动脉插管注射尿素治疗腮区血管瘤的临床观察

通过颈外动脉结扎、插管注射尿素的方法治疗腮区血管瘤3628例，经过随访证实：经一个疗程治愈者为68％，再加上局部注射，可全部治愈。颈外动脉结扎、插管注射尿素治疗腮区血管瘤的机制在于阻断了肿瘤的血供，尿素可使血管内皮细胞皱缩、变性、坏死，最终被纤维组织代替。颈外动脉插管注射尿素法，方法简便、安全、疗效确切。     

公路改扩建工程中的路面排水设计

路面排水设计对于公路的路基稳定及路面使用寿命有着显著影响,本文通过对工程实际问题的探讨研究,从路面表面排水、超高段排水、分隔带排水设计等方面对公路改扩建工程中的路面排水设计提出了独特的见解,为今后的工程应用提供借鉴。     

Traffic safety,usability and streetscape effects of new design principles for major urban roads

An important aspect of area-wide traffic calming concepts is the integration of major urban roads, because 70 to 80 percent of all urban accidents occur on major roads. Traffic calming which is primarily based on the locational shift to such main thoroughfares is socially injust, because — in spite of all disturbances on those streets — about one quarter of the urban population live there. Social justice can only be somewhat achieved if the expenditures for traffic calming and streetscaping are not used — as today is most common — for accumulating the advantages in the low traffic side streets, but aimed at a partial balance and compensation for the strains caused by car traffic on the major streets. Some compensatory measures and new design principles will be discussed. Backgrounds are the experience in six German model cities of area-wide traffic calming, several research projects and the discussion about new guidelines for major urban roads. Where traffic and environmental burdens focus, the concentration concept should be extended by compensatory measures. That is the state of discussion in Germany examplified by nine topics.This is an edited version of a speech presented by the author at the International Conference Living and Moving in Cities in Paris, January 1990.     

干道信号协调控制优化方法

针对干道信号协调控制中控制策略及其控制优化参数设置上存在的问题,考虑到智能控制中Sugeno模糊推理所具有的复杂系统动态性能表达能力和神经网络控制方法所具有的学习能力,结合两者的优势建立了1种基于模糊神经网络的交通信号协调控制模型,实现对绿信比与相位差的优化,使用微观交通仿真软件Vissim对干线交通进行了仿真研究,仿真结果表明,该方法能更为有效地减小平均车辆延误。