罗村口-富宁高速公路沿线原生生态与植物调查筛选研究

针对罗村口-富宁高速公路,调查了公路沿线的自然生态、植被种类分布状况和植物群落结构,并根据高速公路生态恢复及绿化景观设计对植物物种的要求,确定了绿化植物的筛选原则,最终筛选出37种原生植物物种,进行种子、种苗的繁育和工程试验,为罗富高速公路生态恢复和绿化提供适合的种源。     

微观交通流仿真一体化环境研究

针对国内交通仿真研究的零散性和解决问题的单一性等特点，结合项目组开发的仿真软件，提出了微观交通流仿真一体化环境的结构和功能，按照面向对象、面向消息和模块化建模的思想对一体化仿真的理论框架以及构建一体化仿真环境的关键技术进行了探讨。     

Monitoring Human Activity in an Area Dedicated to the Protection of the Endangered Mediterranean Monk Seal

Mediterranean monk seal populations have declined dramatically and survive in subpopulations scattered throughout their original distribution. The National Marine Park of Alonnisos, Northern Sporades is the first marine protected Area dedicated to the protection of the species in the Mediterranean. A Monitoring and Awareness Project has been carried out in the area from 1993 to 2000, the results of which have produced a detailed profile of the human usage pattern of the Park and indicated a significant reduction of illegal activities in the area. The pattern of human usage has enabled the monitoring team to adjust their efforts in the Park over time and provided essential baseline data for future management. The combined monitoring and awareness efforts have contributed significantly to the conservation of the Mediterranean monk seal by successfully protecting pupping sites and reducing human-induced mortality of the species in the area.     

成都地铁综合监控系统检修优化探讨

介绍了地铁综合监控系统的检修模式,根据设备故障强度和故障频次给出分级分类矩阵图。针对成都地铁1号线综合监控系统的检修模式,结合运营过程中实际的检修模式优缺点,从数据进行分析,得出相对较为合理的检修模式和优化检修的一些建议。     

城市轨道交通车站运营综合监控与管理流程优化

当前城市轨道交通车站的运营监控与管理相对零散,各子系统的联系与协调还比较混乱。以上海城市轨道交通车站综合监控系统为例,分析了当前车站运营管理流程,针对现有子系统提出了流程整合的方法,对现有的业务流程状态提出了标准化优化。旨在整合车站运营管理流程,实现车站系统的流畅运行,提高轨道交通的运营效率与安全。     

城市重大枢纽工程施工期交通组织方案研究

施工期间交通组织方案的研究和制定对城市综合枢纽的建设而言意义重大。以南京市浦口区浦泗综合枢纽工程施工期交通组织方案研究为例,阐述了城市枢纽工程施工期交通组织规划的方法和措施。利用工程实践证明,合理规划交通组织方案对降低工程施工成本、减小城市交通的影响、保证工程建设和城市交通安全的效果。     

卫星定位数据驱动的营运车辆驾驶人驾驶风险评估模型

为了提高营运车辆驾驶人安全管理的精细化水平，合理地评估驾驶人驾驶风险程度，有的放矢地降低高风险驾驶人的事故率，基于卫星定位数据特点及驾驶行为与驾驶风险的相关关系设计26个驾驶行为特征参数。考虑到高速和非高速行驶时相同驾驶行为对驾驶风险的影响区别较大，根据23名营运车辆驾驶人的实测数据有针对性地筛选高速和非高速路段驾驶人风险评估指标，构建营运车辆驾驶人驾驶风险评估指标体系。然后，基于熵权法、独立性权系数法和Spearman相关系数法建立集成赋权法，确定各评估指标的权重。最后，雇佣40名营运车辆驾驶人进行实车试验以验证模型的合理性。结果表明：车辆速度和加速度方面的驾驶行为特征可以用于评估驾驶人的驾驶风险且评估效果较好，驾驶风险评估得分与实际交通冲突次数呈正相关关系，所建立模型可以较为准确地评估营运车辆驾驶人驾驶风险的高低，准确率达到77.50%，该模型在不同地区使用时，准确率存在一定的差异，但在容许范围之内，方法具有较好的鲁棒性。     

工程项目管理集成化模式及发展趋势

项目管理集成化对提高项目管理公司或项目承包公司的核心竞争力具有重要意义,是未来我国工程总承包企业与国外企业竞争的关键领域。政府应引导国内大型工程公司向PMC方向发展,这不仅是提高国内工程公司项目管理水平的需要,也是带动我国工程建设业开拓国际市场的需要。     

Influence of polygonal wear of railway wheels on the wheel set axle stress

The coupled vehicle/track dynamic model with the flexible wheel set was developed to investigate the effects of polygonal wear on the dynamic stresses of the wheel set axle. In the model, the railway vehicle was modelled by the rigid multibody dynamics. The wheel set was established by the finite element method to analyse the high-frequency oscillation and dynamic stress of wheel set axle induced by the polygonal wear based on the modal stress recovery method. The slab track model was taken into account in which the rail was described by the Timoshenko beam and the three-dimensional solid finite element was employed to establish the concrete slab. Furthermore, the modal superposition method was adopted to calculate the dynamic response of the track. The wheel/rail normal forces and the tangent forces were, respectively, determined by the Hertz nonlinear contact theory and the Shen–Hedrick–Elkins model. Using the coupled vehicle/track dynamic model, the dynamic stresses of wheel set axle with consideration of the ideal polygonal wear and measured polygonal wear were investigated. The results show that the amplitude of wheel/rail normal forces and the dynamic stress of wheel set axle increase as the vehicle speeds rise. Moreover, the impact loads induced by the polygonal wear could excite the resonance of wheel set axle. In the resonance region, the amplitude of the dynamic stress for the wheel set axle would increase considerably comparing with the normal conditions.     

美军综合电子信息系统发展概述

介绍了美军综合电子信息系统的发展历程,以及其未来发展概述;重点阐述了美军综合电子信息系统的几个典型计划和系统,包括全球信息栅格(GIG)、网络中心战(NCW)、建立C4KISR系统和部署联合指挥控制系统(JC2);对于美军综合电子信息系统的发展措施,概括为强调联合作战、从传感器到射手的综合一体化、加强基础设施的建设、发展空间优势和重视软件开发、采用商用流行技术;最后对我国综合电子信息系统的发展进行了简单评述.