利用数字图像处理技术获取AC、SMA 及OGFC 等6 种不同的沥青道路表面构造的二值图像，验证了表面构造分布的多重分形特性，分析了表面构造分布多重分形谱参数的表征意义。研究结果表明：多重分形谱参数能从不同角度较好地描述表面构造分布情况；多重分形谱峰值fmax 为表面下凹构造的分形维数，峰值fmax 越大，表面也就越粗糙；谱宽Δα整体反映了表面构造分布的不均匀性，沥青道路表面构造粒径越大、级配越粗
Lane change is a common type of driving maneuvers in daily travelling,and is a key functionality that is required of autonomous vehicles.For the design and development of autonomous driving systems,th
Driving emotion plays an important role in intention generation and behavior decision.Its an important premise to understand the influencing mechanism of driving emotion on intention correctly for the
Pedestrianscrossing behavior at intersections is one of the most important causes for pedestrian involved traffic crashes.The primary objective of this study is to quantify the relationship between pe
巡游出租车运力规模动态调整机制是现阶段出租车行业改革中重要内容之一.针对巡游出租车运力规模调整指标体系的匮乏,以宁波市出租车信息管理系统运营数据为基础,综合考虑了单车日均车次、里程利用率、营收水平、单车平均营运时长、单差等待时长等指标,构建了巡游车运力规模调整回归树模型,并耦合了万人拥有量、出租车在公交出行结构分担率、巡游车与网约车业务分担比以及乘客平均等候时间等指标在供需状态中的表征作用和重要性
Logistic regression is a commonly used statistical method in road safety research to explore the relationship between crashes and associated factors.The method of selecting useful variables resulting
为了从广域的视角准确快速地获取连续交通流信息,基于无人机视频提出了一种车辆自动识别方法.对于视频中任意连续三帧图像,首先进行4×4 降维处理和灰度化处理,并人工勾勒出感兴趣区域(ROI,Region of Interest),以降低图像维度、固化检测区域；其次,针对这三帧图像,利用对称帧间差分法提取ROI 中的运动目标并进行滤波与融合处理；最后,基于形态学处理和轮廓检测等方法剔除标线及图像杂质等噪
Aiming at the shortcomings of risk analysis of single bridge or tunnel in China currently,a risk assessment model of traffic subsystem focused on the Bridge-Tunnel Transition sections(BTTs)with coupli
Fire scenarios of urban long straight underground tunnel have been studied.The large eddy simulation method is used to calculate the length of near field of fire source,which is related to smoke contr
为了研究桥梁全生命期技术状况自然衰变，预测桥梁状况发展，本文基于同条高速上同类典型桥梁的有限历史技术状况数据，建立了桥梁技术状况自然衰变模型，可用以预测桥梁技术状况未来的发展趋势，为养护时机的确定提供基础。研究表明基于有限历史技术状况数据建立的桥梁技术状况自然衰变模型具有一定的可操作性和适用性。