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刘增祥 《筑路机械与施工机械化》1992,9(5):26-29
本文作者就自已在实际道路施工中,对柔性路面摊铺、压实机械的配套,选型与正确使用进行了实质性的研究与探讨.从工程规模、施工方法、施工现场状况、施工工期、劳务人员的组合等方面进行了论述,并进一步对订购使用国外摊铺,压实机械时应注意的问题提出了建设性意见,值得借鉴. 相似文献
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道路交通安全管理规划理论与应用研究 总被引:6,自引:1,他引:5
分析了我国近年来道路交通安全形势,结合〈中华人民共和国道路交通安全法〉的要求,对编制道路交通安全管理规划的相关理论进行了研究.研究从探讨道路交通安全系统出发,提出了道路交通安全管理规划的定义和编制规划应遵循的原则,并给出了规划思路、规划技术路线和规划内容的建议.最后结合城市介绍了规划的实际编制过程. 相似文献
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作为道路环境的组成部分,气候条件与行车安全性之间有着密切的联系。本文将首先对影响交通的天气气象因素进行分类,然后通过对沪宁高速公路事故资料及相应气象资料的综合分析,统计不同天气条件下的事故分布,从事故原因、形态、时间分布以及严重程度等方面对灾害性天气下的事故特征进行讨论,并初步探讨了不良天气环境下高速公路安全管理系统的建立。 相似文献
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路面对四轮汽车的输入谱矩阵 总被引:5,自引:1,他引:5
通过理论分析,导出了前后轮距不同以及后轮双胎时路面对四轮车辆的输入谱矩阵。与试验数据对比证明,本文提出的模型更为符合实际情况,而且具有很大的通用性,因此可为汽车随机振动及平顺性的的理论分析和试验工作提供了较为合理的谱矩阵数学模型。 相似文献
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基于道路设计与交通规划的道路选线优化模型 总被引:1,自引:0,他引:1
结合道路设计理论与交通规划理论,以地理信息系统为平台,开发道路选线优化模型。该模型是一个费用指向的优化问题,最小化费用目标函数中包括道路建设费用、土方工程费、道路交通诱发的环境污染的不经济费用,OD交通在路网上总走行时间的时间费用等。优化模型首先随机生成新建道路的空间位置候选方案集,并自动设计新建道路的平曲线和竖曲线,计算新建道路的各项工程费用。然后,对变化的路网进行自动拓扑,通过交通量分配得到OD交通在新路网上的走行时间和交通流特征,计算OD交通的环境负荷。最后,在遗传算法中判断候选方案的优劣,直到得到一个最佳的新建道路的空间位置方案为止。 相似文献
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西津西路柳(家营什字)崔(家崖)段是兰州市东西大通道的重要组成部分。由于各种原因,路面病害严重,路面感观较差,面临全面大修。结合已形成的实际情况,分析路基路面病害的主要原因,提出对路基路面的维修处理方案。 相似文献
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Driving road identification is the key issue of a vehicle navigation system that supports various services of intelligent transportation systems. The method for driving road identification is also known as map matching (MM). In spite of the development of MM algorithms, limitations still exist in obtaining the positioning data and preparing candidate roads (CRs) that may result in mismatches in some special difficult road configurations such as flyovers and parallel roads. To overcome the limitations, an integrated trajectory-based MM (tbMM) system is proposed based on the trajectory similarity evaluation method. The system can fuse the information from global positioning systems (GPS) and inertial sensors to generate the vehicle trajectory that represents the vehicle continuous movement in three dimensions. The elevation data of vehicle and roads are involved to enhance the trajectory-based matching process. Also the method employs an optimized mechanism for generating and maintaining CRs. Using the mechanism, separated road segments in a digital map are reorganized in the form of possible driving roads and the topology among them is guaranteed. Moreover, the CRs are obtained considering all the possibilities in determining the driving road so that the valuable historical information can be effectively reserved to provide more reliable matches in ambiguous situations. The tbMM system was evaluated using a number of real-world vehicle-level test datasets in urban areas in Beijing. Also a comparison test was performed to evaluate the driving road identification accuracy against existing MM algorithms. The results show that the tbMM system can provide reliable matches with about 99% accuracy in all the difficult scenarios and outperforms the existing algorithms. 相似文献
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介绍了以MC9S12DP256B微控制器为核心的发动机诊断系统的软硬件系统设计。利用MCU的增强型串口通讯模块,并且结合其强大的定时器模块,采用输入捕捉等功能,来完成与发动机电子控制单元的通讯,从而快速地得到发动机系统的故障情况以及运行参数。该系统已经在实际的车辆检测与维修中进行了应用,为车辆维修人员带来了快捷、准确的诊断手段。 相似文献
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The numbers of traffic accidents and its associated mortalities are decreasing every year in Japan. However, there continue to be cases of deaths and injuries caused by malicious driving including drunk driving. The forensic autopsy of traffic accident victims is important to determine the cause of death as well as the responsibility of traffic accidents. In this study, we investigated the cases of forensic autopsies related to traffic accidents, reported between 2013 and 2017, at the Department of Legal Medicine of Tokyo Women's Medical University. In this period, 22 autopsies were performed for traffic accidents; however, only 6 of them were associated with alcohol consumption. Most traffic accidents occurred during the night, and in one case, the victim was found lying on the road. Furthermore, there were 4 cases in which drugs in the blood or urine of the victim were detected; however, the actual relationship with the cause of death and traffic accident was not identified. It was also found necessary to take measures against pedestrian drinking. Moreover, only a few drugs led to a decrease in driving ability, highlighting the necessity of further data is necessary to provide insights into the type of drug consumed and the cause of accident. 相似文献
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公路设计时会出现几种设计方案都满足道路设计规范要求,造成设计人员难以抉择的局面;另外,现有的针对设计阶段道路开展行车安全性评价和潜在危险点预测的方法还不完善。鉴于此,借助于车辆动力学仿真模拟方法,建立路线-驾驶员-车辆的闭环仿真系统;以此为平台对龙泉~浦城(浙闽界)高速公路开展虚拟行车试验,根据沿路线上的汽车动力学以及运动学响应,评价初步设计、优化设计和施工图设计方案的速度协调性,道路侧滑、侧翻的可能性,行车舒适性和操纵轻便性,最终综合判断选择最优设计方案并对方案中的一些不足给出相应的建议。 相似文献
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武军明 《筑路机械与施工机械化》1993,(4)
本文分析了我国重返关贸总协定(简称“入关”)后筑路机械行业的市场供求现状,提出了筑路机械工业为迎接“入关”挑战在经济规模、产业结构、技术质量、管理营销、售后服务等方面的看法。 相似文献
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