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Full-Text Articles in Engineering
Cwr 4812 Water Resources Design, Sarina Ergas
Cwr 4812 Water Resources Design, Sarina Ergas
Service-Learning Syllabi
No abstract provided.
Finding P-Hub Median Locations: An Empirical Study On Problems And Solution Techniques, Xiaoqian Sun, Weibin Dai, Yu Zhang, Sebastian Wandelt
Finding P-Hub Median Locations: An Empirical Study On Problems And Solution Techniques, Xiaoqian Sun, Weibin Dai, Yu Zhang, Sebastian Wandelt
Civil and Environmental Engineering Faculty Publications
Hub location problems have been studied by many researchers for almost 30 years, and, accordingly, various solution methods have been proposed. In this paper, we implement and evaluate several widely used methods for solving five standard hub location problems. To assess the scalability and solution qualities of these methods, three well-known datasets are used as case studies: Turkish Postal System, Australia Post, and Civil Aeronautics Board. Classical problems in small networks can be solved efficiently using CPLEX because of their low complexity. Genetic algorithms perform well for solving three types of single allocation problems, since the problem formulations can be …
Numerical Analysis Of Heat-Curved I-Girders, Antoine Gergess, Rajan Sen
Numerical Analysis Of Heat-Curved I-Girders, Antoine Gergess, Rajan Sen
Civil and Environmental Engineering Faculty Publications
Heat curving is a practical and economical process used by steel fabricators for curving structural steel. In this method, the flange edges of a fabricated straight girder are asymmetrically heated to induce residual curvature on cooling. Available analytical methods for predicting the resulting residual stress, strain and curvature are complex and iterative because of the need to account for material and geometric non-linearity. This paper presents a single-step, non-iterative, numerical procedure for determining the effects of heat-curving on residual stress and strain based on a previously developed simplified analysis. Thermal equilibrium equations for idealized heating profiles are first recast in …
Air Transport Versus High-Speed Rail: An Overview And Research Agenda, Xiaoqian Sun, Yu Zhang, Sebastian Wandelt
Air Transport Versus High-Speed Rail: An Overview And Research Agenda, Xiaoqian Sun, Yu Zhang, Sebastian Wandelt
Civil and Environmental Engineering Faculty Publications
The development of high-speed rail (HSR) services throughout the last decades has gradually blurred the concept of competition and cooperation with air transportation. There is a wide range of studies on this subject, with a particular focus on single lines or smaller regions. This article synthesizes and discusses recently published studies in this area, while aiming to identify commonalities and deviations among different regions throughout the world, covering services from Europe, Asia, and North America. Our meta-analysis reveals that the literature is highly controversial and the results vary substantially from one region to another, and a generalization is difficult, given …
Exploring Factors Contributing To Lane Changes During Left Turns On Quadruple Left-Turn Lanes At Signalized Intersections, Fulu Wei, Zhenyu Wang, Jian Lu
Exploring Factors Contributing To Lane Changes During Left Turns On Quadruple Left-Turn Lanes At Signalized Intersections, Fulu Wei, Zhenyu Wang, Jian Lu
CUTR Faculty Journal Publications
Quadruple left-turn lanes are employed gradually at some major intersections in Jilin, China. At these intersections, frequent lane changes during left turns of vehicles can lead to vastly disordered traffic operations. In this study, the factors contributing to lane changes during left turn behaviors at quadruple left-turn lane intersections were interpreted based on a field survey. In total, data on 192 green intervals and 550 individual lane-change behaviors were collected in Changchun, Jilin Province. A lane-changing rate model was established to predict the rate of lane changes during left turns. In addition, an interval selection model was built to estimate …
Improvement Assessment Of Bus Serviceability By Proposing Route Revision, Shahrzad Ainkeshavarzi, Hamed Soleimani
Improvement Assessment Of Bus Serviceability By Proposing Route Revision, Shahrzad Ainkeshavarzi, Hamed Soleimani
CUTR Faculty Journal Publications
Public transit is an essential part of a city’s transportation. An efficient transit system makes a city more sustainable by reducing the number of single occupancy vehicles leading to a reduction in emissions, energy consumption and less congestion on streets. Public serviceability is an important indicator to indicate how good a transit route is determined; however, it could change during the years since population density is variable. This study is intended to do a comparison between serviceability of a bus line in Memphis, Tennessee for one zip code area to point out the necessity of considering route revising in short-term …
Advances In Modelling Connected And Automated Vehicles, Xiaobo Qu, Xiaopeng Li, Meng Wang, Vinayak Dixit
Advances In Modelling Connected And Automated Vehicles, Xiaobo Qu, Xiaopeng Li, Meng Wang, Vinayak Dixit
Civil and Environmental Engineering Faculty Publications
No abstract provided.