基于GIS的高速铁路空间结构物布置方法研究

铁路空间结构物的设置考虑因素众多,在节约资金的前提下,同时确定合理的桥梁、路基、隧道方案是一种尝试;利用GIS系统中DEM数据管理及空间分析功能,提取出特定平面线路位置条件下的地面线高程数据,在满足高速铁路线路纵断面设计原则的基础上,按照工程量及工程造价最小的目标函数条件,通过编程求解出拟定坡度条件下最优的路基、桥梁、隧道长度布置方案,计算结果满足结构物布置的经济性要求。     

创建铁路信息安全管理及其标准体系的探讨

信息安全管理正成为当前全球的热门话题,建立和健全信息安全管理及其标准体系对铁路运输生产安全管理工作具有十分重要的意义,尤其是对我国重载、高速铁路的迅猛发展将发挥关键性作用。为此,从我国铁路信息安全管理现状入手,在阐述和分析国内外信息安全标准化情况的基础上,提出包括策划准备、范围确定、调查评估、框架建立、文件编写、运行改进和体系审核等内容的铁路信息安全管理及其标准体系的创建思路。     

浅析安徽省公路交通情况调查信息化发展的构思

根据交通运输部对公路交通情况调查工作的要求,结合安徽省的实际情况,提出安徽省公路交通情况调查工作信息化发展的基本构思.     

Investigating the influence of soil properties on railway traffic vibration using a numerical model

This paper presents the influence of dynamic and geometrical soil parameters on the propagation of ground vibrations induced by external loads. The proposed approach is based on a three-dimensional model, focusing on realistic excitation sources like impulse loads and moving railway vehicles. For the latter, a complete vehicle/track model is developed. The simulation is performed in time domain, offering an interesting approach, compared with classic cyclic analyses. The ground is modelled initially as an elastic homogeneous half-space and additionally as a layered half-space. First, the effect of homogeneous soil properties on ground vibration is analysed. Soil stratification is then taken into account, using various configurations. Analysis reveals that as receiver distance increases ground wave reflection in a layered ground plays an important role in the reduction of ground surface motion. This effect is magnified when the phase velocity wavelength becomes large compared with the depth of the surface layer.     

超偏载监测管理系统的研究与开发

超偏载检测装置（以下全文简称超偏载）是一种自动地对行进中的列车实行不停车、不摘钩连续动态称量的计量设备，在铁路安全保障中有着特殊的位置，是铁路安全运行的重要组成部分。以图形形式显示全国超偏载的状态信息，可以及时、准确地掌握超偏载地理分布、使用状态、检定状况等相关数据，并及时与相关单位（包括国家轨道衡计量站分站、超偏载使用车站、用户和衡器生产厂家等）进行业务信息交换，使超偏载管理工作更加科学、高效、规范。     

DEADBEAT COVARIANCE CONTROLLER DESIGN FOR SAMPLED-DATA SYSTEMS

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Development of advanced driver assistance systems with vehicle hardware-in-the-loop simulations

This paper presents a new method for the design and validation of advanced driver assistance systems (ADASs). With vehicle hardware-in-the-loop (VEHIL) simulations, the development process, and more specifically the validation phase, of intelligent vehicles is carried out safer, cheaper, and is more manageable. In the VEHIL laboratory, a full-scale ADAS-equipped vehicle is set up in a hardware-in-the-loop simulation environment, where a chassis dynamometer is used to emulate the road interaction and robot vehicles to represent other traffic. In this controlled environment, the performance and dependability of an ADAS is tested to great accuracy and reliability. The working principle and the added value of VEHIL are demonstrated with test results of an adaptive cruise control and a forward collision warning system. On the basis of the ‘V’ diagram, the position of VEHIL in the development process of ADASs is illustrated.     

Fuzzy-logic-based incident detection for signalized diamond interchanges

This paper documents a fuzzy-logic-based incident detection algorithm for signalized urban diamond interchanges. The model is capable of detecting lane-blocking incidents whose effects are manifested by patterns of deterioration in traffic conditions that require adjustments in signal control strategies. As a component of a real-time traffic adaptive control system for signalized diamond interchanges, the algorithm feeds an incident report (i.e., the time, location, and severity of the incident) to the system's optimization manager, which uses that information to determine the appropriate signal control strategy.The performance of the model was studied using a simulation of an actual diamond interchange. The simulation study evaluated the model's performance in terms of detection rate, false alarm rate, and mean time to detect. The model's performance was encouraging, and the fuzzy-logic-based approach is considered promising.     

Spatial impacts of road pricing: Accessibility, regional spillovers and territorial cohesion

Road pricing policies are gaining prominence in EU countries. These policies have positive impacts leading to mobility patterns which are socially and environmentally more desirable, but they also have negative impacts. One negative impact is to be found in regional accessibility, due to the increase in generalized transport costs. This study presents a methodology based on accessibility indicators and GIS to assess the accessibility impacts of a road pricing policy. The methodology was tested for the Spain’s road network considering two road pricing scenarios. It enables not only the more penalized regions to be identified but also negative road pricing spillover effects between regions. These effects are measured in terms of accessibility changes occurring in one region produced by charges implemented in another region. Finally, the study of accessibility disparities (by calculating inequality indexes for each of the scenarios considered), provides policymakers with useful information regarding the impact of road pricing policies from the point of view of territorial cohesion.