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When operated at low speeds, electric and hybrid vehicles have created pedestrian safety concerns in congested areas of various city centers, because these vehicles have relatively silent engines compared to those of internal combustion engine vehicles, resulting in safety issues for pedestrians and cyclists due to the lack of engine noise to warn them of an oncoming electric or hybrid vehicle. However, the driver behavior characteristics have also been considered in many studies, and the high end-prices of electric vehicles indicate that electric vehicle drivers tend to have a higher prosperity index and are more likely to receive a better education, making them more alert while driving and more likely to obey traffic rules. In this paper, the positive and negative factors associated with electric vehicle adoption and the subsequent effects on pedestrian traffic safety are investigated using an agent-based modeling approach, in which a traffic micro-simulation of a real intersection is simulated in 3D using AnyLogic software. First, the interacting agents and dynamic parameters are defined in the agent-based model. Next, a 3D intersection environment is created to integrate the agent-based model into a visual simulation, where the simulation records the number of near-crashes occurring in certain pedestrian crossings throughout the virtual time duration of a year. A sensitivity analysis is also carried out with 9000 subsequent simulations performed in a supercomputer to account for the variation in dynamic parameters (ambient sound level, vehicle sound level, and ambient illumination). According to the analysis, electric vehicles have a 30% higher pedestrian traffic safety risk than internal combustion engine vehicles under high ambient sound levels. At low ambient sound levels, however, electric vehicles have only a 10% higher safety risk for pedestrians. Low levels of ambient illumination also increase the number of pedestrians involved in near-crashes for both electric vehicles and combustion engine vehicles. 相似文献
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以鞍山市莘英路隧道(东洞)为例,首先通过外观检查选取裂缝比较严重且具有代表性的43块板,再采用地质雷达,激光断面仪等对其进行全面检查,针对隧道裂缝、渗漏水、脱空等主要病害进行原因分析.在此基础上,结合该隧道的水文地质,给出隧道维修加固方案,以期为类似工程提供可参考的依据. 相似文献
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病险水库建筑物的检测和安全评价是病险水库除险加固过程中必不可少的环节,本文通过对石门水库溢洪闸的安全性、结构完整性和局部结构功能进行评价,为除险加固设计和计算提供依据和可靠数据。 相似文献
167.
随着计算机技术的发展,人工智能技术逐步开始了实用化的进程。近些年来,最为热门的人工智能应用就是“智能Agent”。随着教育信息化进程的推进,智能Agent在网络化学习中发挥着其独特的作用。本文首先介绍了智能代理(IntelligentAgent)的知识,然后探讨其在网络虚拟学习社区教学活动中的具体应用。 相似文献
168.
概述了线路声学检测系统(TADS)的组成、操作和安装,并介绍了Spoornet公司和昆士兰铁路部门运用TADS系统的经验。 相似文献
169.
本文在虚拟世界里,构造了交通系统的和谐仿真。首先介绍了智能体Agent、多智能体组成的系统MAS及其规则,然后分析交通环境(道路)、车辆、人组成的系统,利用集对分析(SPA)、人、事、物系统(WSR)和集对匹配系统(SPM)以及A.Kaufmann最强路算法与集对匹配合成算法,构造出和谐的道路、车辆、人、环境, 并给出智能调度的应用实例。 相似文献
170.