道路交通流数据检验与修复方法

交通流数据常见问题分为数据缺失、数据无效和数据时间点3类，针对这些问题，提出了一种交通流数据检验与修复方法。以北京市交通流数据为例，应用这一方法进行了分析与验证。结果表明该方法具有很好的实际应用效果。交通流数据质量检验可以保证从数据源所获得数据的正确性和完整性，为数据的管理和应用提供了可靠的数据基础.     

客运专线客运服务信息系统工程设计方案探讨

目前国内尚没有客运专线客运服务信息系统的设计及应用实例，本文结合相关客运专线工程情况，对其进行研究和探讨，旨在提出一套系统整体解决方案；文章通过详细分析客运专线的用户需求，研究了客运专线客运服务信息系统的构成及功能，提出了具体的工程设计技术方案；本文提出的设计方案，为客运专线客运服务信息系统的设计和建设提供了有益的参考。     

钢渣沥青混合料路用性能试验研究

为了探究不同钢渣骨料掺量下沥青混合料的路用性能,对AC-13C型钢渣沥青混合料在钢渣掺量分别为0%、30%、50%、70%和90%时采用传统马歇尔击实试验,按照体积法原理进行配合比设计,分析研究了不同钢渣掺量下沥青混合料的路用性能。结果表明:钢渣骨料表现为碱性,与沥青胶结料黏附性较好,随着钢渣掺量的增加,钢渣沥青混合料高温性能以及抗水损坏性能均表现出先增大后减小趋势,低温性能以及体积安定性逐渐降低,钢渣掺量在50%时沥青混合料路用性能相对最佳。     

Total dynamic response of a PSS vehicle negotiating asymmetric road excitations

A planar suspension system (PSS) is a novel automobile suspension system in which an individual spring–damper strut is implemented in both the vertical and longitudinal directions, respectively. The wheels in a vehicle with such a suspension system can move back and forth relative to the chassis. When a PSS vehicle experiences asymmetric road excitations, the relative longitudinal motion of wheels with respect to the chassis in two sides of the same axle are not identical, and thus the two wheels at one axle will not be aligned in the same axis. The total dynamic responses, including those of the bounce, pitch and the roll of the PSS vehicle, to the asymmetric road excitation may exhibit different characteristics from those of a conventional vehicle. This paper presents an investigation into the comprehensive dynamic behaviour of a vehicle with the PSS, in such a road condition, on both the straight and curved roads. The study was carried out using an 18 DOF full-car model incorporating a radial-spring tyre–ground contact model and a 2D tyre–ground dynamic friction model. Results demonstrate that the total dynamic behaviour of a PSS vehicle is generally comparable with that of the conventional vehicle, while PSS exhibits significant improvement in absorbing the impact forces along the longitudinal direction when compared to the conventional suspension system. The PSS vehicle is found to be more stable than the conventional vehicle in terms of the directional performance against the disturbance of the road potholes on a straight line manoeuvre, while exhibiting a very similar handling performance on a curved line.     

Models and methodology for optimal trajectory generation in safety-critical road–vehicle manoeuvres

There is currently a strongly growing interest in obtaining optimal control solutions for vehicle manoeuvres, both in order to understand optimal vehicle behaviour and, perhaps more importantly, to devise improved safety systems, either by direct deployment of the solutions or by including mimicked driving techniques of professional drivers. However, it is non-trivial to find the right combination of models, optimisation criteria, and optimisation tools to get useful results for the above purposes. Here, a platform for investigation of these aspects is developed based on a state-of-the-art optimisation tool together with adoption of existing vehicle chassis and tyre models. A minimum-time optimisation criterion is chosen for the purpose of gaining an insight into at-the-limit manoeuvres, with the overall aim of finding improved fundamental principles for future active safety systems. The proposed method to trajectory generation is evaluated in time-manoeuvres using vehicle models established in the literature. We determine the optimal control solutions for three manoeuvres using tyre and chassis models of different complexities. The results are extensively analysed and discussed. Our main conclusion is that the tyre model has a fundamental influence on the resulting control inputs. Also, for some combinations of chassis and tyre models, inherently different behaviour is obtained. However, certain variables important in vehicle safety-systems, such as the yaw moment and the body-slip angle, are similar for several of the considered model configurations in aggressive manoeuvring situations.     

并联高架路的中间匝道及岛式车站站棚

并联高架路是一种车辆在高架道路上逆向行驶,主要为城市公共交通服务的道路。地面道路与并联高架路联系的匝道设在并联高架路的中间;岛式车站站棚的立柱设在岛式站台的两侧,这样岛式车站内空间宽敞,站棚受力合理,结构稳固,适合在站棚下安装为电动汽车充电的接触板。     

加筋土工程设计方法研究

通过将当前加筋土工程设计方法归纳为三大类，并重点阐述各设计方法的基本假设、原理和适应范围等，找出三者之间的异同。可为加筋土工程设计方法的进一步研究提供铺垫。     

基于城市规划管理角度的停车问题对策研究

首先分析目前对于停车问题的常规解决思路及措施,然后分析其缺陷,最后从城市规划管理角度提出相应的保障措施及对策。主要包括控制性详细规划的编制与实施、建筑物配建标准制定及实施、土地复合开发等管理规定。研究对于指导城市新区建设、改善停车现状有重要的指导意义。     

浅析齐齐哈尔市永安立交桥节省用地完善交通功能

本文针对齐齐哈尔市永安立交桥桥址地理环境局限的特殊条件，提出一个既能满足交通要求，又节省建设用地，减少投资的工程设计方案，经建成后多年的运行，效果明显。     

The impact of major road developments on the spheres of urban influence of Japanese cities

This study aims to measure the impact of major road developments on the spheres of urban influence of Japanese cities.First, the sphere of urban influence is defined by application of an individual behavior model. The model explains the number of trips to representative cities in regions from the residential place of each individual using the following factors; the attractiveness of cities, the travel time to cities and the individual's free time. Development of major roads shortens the travel time, and this causes the change in the sphere of urban influence. The model we propose has the structure to explain this phenomenon.Second, this method is applied to all of Japan where expressways are now being rapidly constructed and, how they change spheres of urban influence is explained. In the application, as a measure of attractiveness of cities, population, commercial and industrial activity, etc. are considered. From these points of view, the impacts of construction of expressways in Japan are estimated.