搜索到13673篇“ INTERSECTION“的相关文章
虹桥路—延安路—古北路六路复杂交叉口改善研究
2024年
平面交叉口特别是复杂不规则的平面交叉口,往往是城市道路网络中运行效率最低、交通拥堵频发、事故率最高的秩序乱点、交通堵点和事故黑点。研究堵点交通治理措施,并随着路网的更新完善和交通流特征的变化进行动态优化和调整,是提高路网运行效率的关键。以上海市虹桥路—延安路—古北路六路复杂交叉口为例,在现状已经做了大量优化工作的基础上,从网络分流、交通组织、节点设计等角度进一步研究改进措施,并运用交通仿真技术,验证改善方案的有效性。
孙李君宋路峰詹俭周杰江文平
关键词:畸形交叉口交通仿真交通改善
基于最优化理论的道路交叉口通行能力模型构建
2024年
随着交通环境的不断变化,部分城市道路平面交叉口的设计已不能满足交通现状,无法承受现有交通流负荷,使交叉口的运行效率低下。基于最优化理论和城市道路交叉口渠化设计准则,通过对交叉口的通行能力、饱和度以及服务水平进行最优量化分析,筛选最优信号周期,匹配最佳优化方案,建立交叉口道路通行能力模型,并以成都市敬成路与方元路交叉口为例,以录像观测法和实地调查法分析该交叉口的交通流特性,运用VISSIM软件建模仿真,进行模型验证。研究结果表明,与原交叉口相比,优化后的交叉口实现了交通流的时空分离,提升了运行效率,研究成果可作为平面交叉口优化设计的参考依据。
李晓雷杨斌詹银霞李欣雨
关键词:交通工程交叉口优化信号交叉口
EMPSI:Efficient multiparty private set intersection(with cardinality)
2024年
Multiparty private set intersection(PSI)allows several parties,each holding a set of elements,to jointly compute the intersection without leaking any additional information.With the development of cloud computing,PSI has a wide range of applications in privacy protection.However,it is complex to build an efficient and reliable scheme to protect user privacy.To address this issue,we propose EMPSI,an efficient PSI(with cardinality)protocol in a multiparty setting.EMPSI avoids using heavy cryptographic primitives(mainly rely on symmetric-key encryption)to achieve better performance.In addition,both PSI and PSI with the cardinality of EMPSI are secure against semi-honest adversaries and allow any number of colluding clients(at least one honest client).We also do experiments to compare EMPSI with some state-of-the-art works.The experimental results show that proposed EMPSI(-CA)has better performance and is scalable in the number of clients and the set size.
Yunbo YANGXiaolei DONGZhenfu CAOJiachen SHENRuofan LIYihao YANGShangmin DOU
关键词:INTERSECTIONPRIMITIVE
无信号灯交叉路口智能车辆调度算法研究
2024年
针对车辆在通过无信号灯交叉路口时存在通行效率低、发生冲突碰撞概率大、通行等待时间长等问题,提出了一种优化调度算法。将交叉路口网格化。考虑车辆在每个网格的方向权值、预警权值、转向权值并进行实时动态赋权,根据权值为车辆实时更新最优路径。基于此,提出了一种基于动态权值路径的算法以寻找车辆最佳行驶路径,可以根据交叉路口车辆的运行环境灵活调整每辆车的运行路线。通过将交叉路口网格化和使用动态权值规划路径相结合,该研究为避免发生碰撞、提高通行效率提供了可行的思路。
谢彭辉孙宁庞堯赵文骞钱俊杰
关键词:车辆调度动态权值
位移型两相位平面交叉口形式设计
2024年
平面交叉口是城市交通各种冲突的交汇点,亦是城市交通瓶颈之所在。传统平面交叉口通行能力存在上限,要求要跳出传统优化改善思路的窠臼,在交叉口设计方法和形式上做出改变。基于交叉口冲突理论,通过分离冲突、简化相位,进而提出位移型两相位交叉口的概念,并以T型交叉口为例,探索了位移型两相位T型交叉口的基本分类和各种形式。结果表明:基于冲突点位移数量和位置差异,位移型两相位T型交叉口可分为单点位移、两点位移、三点位移共3大类7种基本形式。本文成果可为平面交叉口优化设计提供一定的借鉴与参考。
申振武邓帅王敏李波邓韩聪
关键词:T型交叉口
分解虚交点法计算回头曲线坐标程序化设计及应用
2024年
在公路工程施工中标准缓和曲线的坐标计算方法已经被工程测量技术人员掌握并广泛应用。在实际工程项目中,测量放样经常会遇到特殊的曲线,回头曲线就是一种特殊的曲线形式,在立交匝道、林地公路、山区公路工程中常见。设计文件中只有交点参数的情况下,如果按照标准的缓和曲线交点法计算回头曲线坐标,其结果不正确。针对这个问题,采用分解虚交点法,把回头曲线转化为标准缓和曲线后,就可以用标准缓和曲线交点法进行回头曲线坐标计算。对回头曲线部分通过几何解析与缓和曲线要素公式建立数学模型,并进行程序化设计可以准确地算出回头曲线的坐标,避免用手工计算因复杂繁琐的公式造成人为的错误,也节省了计算过程消耗的时间。经工程实例分析和验证,用分解虚交点法计算的回头曲线坐标精度高,程序化设计后,加快了计算速度,提高了工作效率,避免了错误的发生。
唐新宇王振明
关键词:回头曲线虚交点
Research of Fly over as a Solution to Congestion of Intersection Junction(Case Study:Jalan Jatingaleh Semarang)
2024年
In the next few years traffic will happen most of the time.This was triggered by the growing rate of vehicles against the road capacity which is not balance.All the time the congestion in the city of Semarang has been occurred at peak hours.Congestion also occurred in between Teuku Umar and Setia Budi road Jatingaleh because of a plot intersection(Kesatrian intersection,PLN intersection and Jatingaleh intersection)with the Toll Road.Jatingaleh is located in the southern city of Semarang which is a central meeting point between the upper and lower Semarang where the vehicle flows in through a combination of local current and regional traffic,and the flow of vehicles coming in and out from highway.The main cause of the problems that occurred in the area of Jatingaleh is due to the numbers of vehicles movement that occurs at the intersections.With the above issues,it is necessary to analyse the existing conditions and look into some solutions.Before carrying out an analysis a field surveys at peak hours for example morning(06:00 to 08:00 am)and for the afternoon(04:00 to 06:00 pm)should be conducted,then the number of vehicles is counted manually with“short-breakcounting”according to types of vehicles.From the analysis we found that the degree of saturation(DS)is 1.61 between Teuku Umar and Setia Budi road during the morning peak hours and 1.56 during the afternoon peak hours.This means that the capacity of the existing road is no longer able to accommodate the traffic flow.One of the solutions for the congestion that occurs at the intersection of Jatingaleh is to apply the efficiency of the intersection that is not in a plot with a Fly over,Underpass and the combination of Fly Over-Underpass.Base on the flow reduction calculation with 3 comparative modeling it shows that the Fly Over is the most technically efficient to be applied in this research.
Rachmat Mudiyono
关键词:CONGESTIONINTERSECTIONINTERCHANGE
基于微分方程曲面求交跟踪法的包容式节点相贯区域建模研究
2024年
包容式节点是一种新型管状相贯式节点,其形态是一种典型的薄壁自由曲面结构。在进行曲面造型过程中会涉及曲面求交的问题,而曲面求交是计算机辅助几何设计(CAGD)领域中的关键技术之一。本文构建了包容式节点非均匀有理B样条(NURBS)曲面模型,将求包容式节点中的相贯线问题转化为NURBS曲面的求交问题。基于微分方程的跟踪算法原理,在分割法求得初始交点的基础上,采用微分方程追踪法求出所有交点,最后将所求得交点进行曲线拟合,交线包围区域即为包容式节点与腹杆相贯焊接区域。
孙远韬罗森胡修齐王斌贺张氢
关键词:曲面求交
The prediction of projectile-target intersection for moving tank based on adaptive robust constraint-following control and interval uncertainty analysis
2024年
To improve the hit probability of tank at high speed,a prediction method of projectile-target intersection based on adaptive robust constraint-following control and interval uncertainty analysis is proposed.The method proposed provides a novel way to predict the impact point of projectile for moving tank.First,bidirectional stability constraints and stability constraint-following error are constructed using the Udwadia-Kalaba theory,and an adaptive robust constraint-following controller is designed considering uncertainties.Second,the exterior ballistic ordinary differential equation with uncertainties is integrated into the controller,and the pointing control of stability system is extended to the impact-point control of projectile.Third,based on the interval uncertainty analysis method combining Chebyshev polynomial expansion and affine arithmetic,a prediction method of projectile-target intersection is proposed.Finally,the co-simulation experiment is performed by establishing the multi-body system dynamic model of tank and mathematical model of control system.The results demonstrate that the prediction method of projectile-target intersection based on uncertainty analysis can effectively decrease the uncertainties of system,improve the prediction accuracy,and increase the hit probability.The adaptive robust constraint-following control can effectively restrain the uncertainties caused by road excitation and model error.
Cong LiXiuye WangYuze MaFengjie XuGuolai Yang
{1012}twin–twin intersection-induced lattice rotation and dynamic recrystallization in Mg–6Al–3Sn–2Zn alloy
2024年
This study investigated the formation mechanism of new grains due to twin–twin intersections in a coarse-grained Mg–6Al–3Sn–2Zn alloy during different strain rates of an isothermal compression.The results of electron backscattered diffraction investigations showed that the activated twins were primarily{1012}tension twins,and 60°<1010>boundaries formed due to twin–twin intersections under different strain rates.Isolated twin variants with 60°<1010>boundaries transformed into new grains through lattice rotations at a low strain rate(0.01 s^(−1)).At a high strain rate(10 s^(−1)),the regions surrounded by subgrain boundaries through high-density dislocation arrangement and the 60°<1010>boundaries transformed into new grains via dynamic recrystallization.
Bin-Jiang LvSen WangFu-Hao GaoNing CuiYi-Nan LiTie-Wei XuFeng Guo

相关作者

蔡玉芳
作品数:82被引量:169H指数:8
供职机构:重庆大学
研究主题:工业CT 投影数据 伪影 图像重建 重建图像
程燕
作品数:11被引量:9H指数:2
供职机构:重庆大学
研究主题:RAY OX INTERSECTION -B 行星排
吴侃
作品数:193被引量:1,121H指数:19
供职机构:中国矿业大学环境与测绘学院
研究主题:开采沉陷 概率积分法 相似材料模型 三维激光扫描 点云数据
马骏
作品数:30被引量:56H指数:4
供职机构:中国人民公安大学
研究主题:高速公路 交通管理 VISSIM 交通事故 遗传算法
刘阿亭
作品数:4被引量:1H指数:1
供职机构:江西理工大学
研究主题:拓扑关系 金字塔模型 数字地球 元组 INTERSECTION