Dynamic demand estimation and microscopic traffic simulation of a university campus transportation network

Abstract

This article documents the authors' experience with the modeling, simulation, and analysis of a university transportation system, using the TRansportation ANalysis and SIMulation System (TRANSIMS). The processes of data preparation and network coding are described, followed by the algorithm developed to estimate the dynamic 24-hour demand, which includes a procedure for estimating the ‘desirability’ of the different parking lots from readily available data. The dynamic demand estimation algorithm is validated by comparing estimated and observed parking lot occupancies, where it is shown that the algorithm is capable of replicating observed results. Finally, an example is included to demonstrate how the developed model can be used in campus transportation planning. Besides serving as a first case study for using TRANSIMS to model a university campus, the study's contributions include the development of a procedure for parking lot desirability ranking and a practical procedure for estimating dynamic demand on university campuses.     

A study on smart parking guidance algorithm

Parking problem becomes one of major issues in the city transportation management since the spatial resource of a city is limited and the parking cost is expensive. Lots of cars on the road should spend unnecessary time and consume energy during searching for parking due to limited parking space. To cope with these limitations and give more intelligent solutions to drivers in the selection of parking facility, this study proposes a smart parking guidance algorithm. The proposed algorithm supports drivers to find the most appropriate parking facility considering real-time status of parking facilities in a city. To suggest the most suitable parking facility, several factors such as driving distance to the guided parking facility, walking distance from the guided parking facility to destination, expected parking cost, and traffic congestion due to parking guidance, are considered in the proposed algorithm. To evaluate the effectiveness of the proposed algorithm, simulation tests have been carried out. The proposed algorithm helps to maximize the utilization of space resources of a city, and reduce unnecessary energy consumption and CO₂ emission of wandering cars since it is designed to control the utilization of parking facility efficiently and reduce traffic congestion due to parking space search.     

调车信号机白灯灯丝检查的探讨

在信号机点灯电路中,灯丝继电器只检查点灯灯丝的情况,不检查另外一个灯的情况。在不影响现有设备稳定性和安全性的前提下,对实时检查调车信号机白灯灯丝的情况进行探讨。     

鱼雷作战仿真系统中鱼雷联邦成员的设计

针对鱼雷武器作战分布交互仿真的需求，给出了鱼雷节点框架的设计思路和实现方法，实现了模型、接口、界面的分离，增强了鱼雷武器模型的可扩展性和可重构性；开发出鱼雷武器模型的基础类库和相关数据库，从而有利于用户对鱼雷模型的修改和维护。运行结果表明，经过上述改造的仿真系统运行稳定，为工程研制人员提供了友好的仿真软件。     

城市高架桥下停车场设置及交通影响分析

随着机动车数量的快速增长,城市"停车难"的问题日益加剧。结合实际案例对城市高架桥下空间的合理利用进行分析研究,提出了桥下停车场实施建设的条件、交通影响分析方法与交通组织方案。     

基于 M/G/1模型的停车场出口排队延误

通过对大型停车场高峰时段出口车辆行驶特性的调查研究,选取了车辆排队的出口车头时距以及出口服务时间两个指标。基于两个指标实测特性和 M/G/1排队模型的分析,计算了停车场出口理论平均排队时间。通过实测车辆平均排队时间,对理论模型计算的平均排队时间进行了修正。实例分析表明：排队时间修正模型能够准确地估计排队时间。提出了基于驾驶员容忍度的排队延误分级标准。     

大数据时代图书馆数据教育模式构建研究

随着信息技术的迅猛发展,大数据逐渐渗透到我们高校教师科研活动的各个环节,我们的大学生也面对着越来越多的数字化资源。为了让我们的图书馆资源更好地为广大师生服务,提升广大师生的数据素养迫在眉睫。在对高校师生学习特征分析的基础上我们试着提出了对他们进行数据素养教育的模式,期望该模式能为提升他们的数据素养有所帮助。     

高等职业技术院校图书馆定位问题探讨

文中论述了高等职业技术院校图书馆定位研究的必要性.并结合广东交通职业技术学院图书馆具体情况,探讨了高职院校图书馆定位研究的主要内容.     

塑造中国海员新形象

固定式甲板泡沫灭火系统是液货船重要的消防设施,系统是否处于即刻可用状态,将直接关系到船舶安全。在船舶安全检查实践中,常发现系统普遍存在日常维护不良,船员操作生疏,甚至从未进行过操作的情况,是存在缺陷较突出的项目。为此,文章结合检查实践,总结出检查要点和缺陷处理原则。     

在船舶安检中加强对船员实操性检查

从船舶安检时进行的船员实操性检查中发现的问题出发,对船舶经营人公司、船方的管理和船员方面存在的问题进行了原因分析,提出了实操检查中存在问题的解决措施。