交通与运输工程:英文版最新文献_第4页

Battery with Integrated Power Supply (BALIN) 集成电源电池(BALIN)

交通与运输工程:英文版 Pub Date : 2020-06-28 DOI: 10.17265/2328-2142/2020.03.002

M. Nobili, Lorenzo Flaccomio, Davide Russo, Giuseppe Grande, A. Biancucci

{"title":"Battery with Integrated Power Supply (BALIN)","authors":"M. Nobili, Lorenzo Flaccomio, Davide Russo, Giuseppe Grande, A. Biancucci","doi":"10.17265/2328-2142/2020.03.002","DOIUrl":"https://doi.org/10.17265/2328-2142/2020.03.002","url":null,"abstract":": The BALIN is a modern device, consisting of a battery with integrated battery charger, dedicated to powering the 24 V services of the carriages. In various Trenitalia rolling stock, used for the regional transport of travelers, there are old and obsolete battery charger devices and there are lead acid batteries that need frequent maintenance operations to be kept efficient. These components, due to their low reliability, are the source of serious disruptions to passenger transport, and the management of their maintenance involves high costs for Trenitalia. In order to solve these problems, Trenitalia has therefore decided to invest resources to develop a new system of integrated power supplies and batteries, therefore the BALIN has been developed. The main advantages of BALIN compared to the original components are the presence of a high energy efficiency battery charger designed to operate in a wide range of temperatures and the presence of sealed lead-acid batteries without maintenance with a life exceeding 6 years. The BALIN is able to disconnect its own batteries from the carriage electrical circuits. The BALIN battery charger also implements an intelligent battery management logic and thanks to the interface with the command and control signals present on the rolling stock, the batteries are isolated from the carriage electric load automatically when the train is off and the service it's over. Another important automatic feature of the BALIN is to protect its batteries from deep discharge, in fact the power supply from the batteries to the electric carriage loads is interrupted when the voltage reaches 21 V. The characteristics mentioned go towards the reduction of the charge/discharge cycles of batteries and contribute to increasing the reliability and durability of batteries throughout the entire life of the rolling stock.","PeriodicalId":62390,"journal":{"name":"交通与运输工程:英文版","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46994170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Various Additives on the Low Temperature Performance of Petroleum Based Asphalt Binders 不同添加剂对石油基沥青结合料低温性能的影响

交通与运输工程:英文版 Pub Date : 2020-06-28 DOI: 10.17265/2328-2142/2020.03.003

R. Muniandy, F. Jakarni, S. Hassim, Adedokun Oladimeji

{"title":"Effect of Various Additives on the Low Temperature Performance of Petroleum Based Asphalt Binders","authors":"R. Muniandy, F. Jakarni, S. Hassim, Adedokun Oladimeji","doi":"10.17265/2328-2142/2020.03.003","DOIUrl":"https://doi.org/10.17265/2328-2142/2020.03.003","url":null,"abstract":"Transverse cracking is a prevalent problem that occurs in asphalt pavement binders in cold climates and diminishes the integrity of the road as well as shortens the life span of the road leading to premature failure. Current specification for testing petroleum asphalt binders for transverse and low temperature cracking is not elaborate enough to accurately model the engineering behaviour of the binders. Besides, neat asphalt derived from petroleum crude oil does not seem to perform well at certain low temperatures without some modification to it. Thus, a study was to be undertaken to determine the low temperature behaviour of 60-70 penetration neat binder modified with traditionally used materials such as Crushed Lime Stone Powder (CLP), Hydrated Lime (HL) and Cellulose Oil Palm Fiber (COPF) at temperatures 0 °C, -5 °C and -10 °C. The study was carried using the state of the art Bending Beam Rheometer (BBR) to assess the stiffness value, m-value and deflection level. The tests were performed in accordance with AASHTO T 313-12 specification. The results of the penetration, rotational viscosity and softening point showed that all of the modified binder specimens are within the required range. However, the performance assessments on the modified petroleum binders with additive materials showed a varied nature with CL powder being the best and the COPF the lowest. It was also observed that the crushed lime stone powder had an increase in stiffness, reduction in deflection and m-value.","PeriodicalId":62390,"journal":{"name":"交通与运输工程:英文版","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46184554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Preliminary Investigation on Establishing a New Resilient Modulus Test Approach for Reduced Size Asphalt Mixture Samples Smaller Than 100 mm Diameter 粒径小于100mm沥青混合料减缩样弹性模量试验新方法的初步研究

交通与运输工程:英文版 Pub Date : 2020-06-28 DOI: 10.17265/2328-2142/2020.03.001

Ratnasamy Munaindy, Francisco Xavier, F. Jakarni, S. Hassim

{"title":"Preliminary Investigation on Establishing a New Resilient Modulus Test Approach for Reduced Size Asphalt Mixture Samples Smaller Than 100 mm Diameter","authors":"Ratnasamy Munaindy, Francisco Xavier, F. Jakarni, S. Hassim","doi":"10.17265/2328-2142/2020.03.001","DOIUrl":"https://doi.org/10.17265/2328-2142/2020.03.001","url":null,"abstract":"The performance evaluation of existing flexible pavements has become a priority issue for many highway maintenances engineers. To make appropriate rehabilitation and management decisions, the engineers most often rely on efficient methods for the determination of the strength of pavement layers. Resilient modulus is a very important parameter to be identified and used in pavement design. The resilient moduli of asphalt mixtures are typically measured using the indirect tension test procedure in compliance with the ASTM D4123 standard that is superseded by ASTM D7369. The standard requirement is that the prepared specimens for the tests should have a minimum height of the sample over its diameter ratio of 0.4. Generally, specimens used in the tests are either a nominal 100 mm or 150 mm in diameter with a minimum thickness over diameter ratio of 0.4. However, 100 mm diameter core specimens taken from site wearing courses with thicknesses ranging from 40 mm to 50 mm most often do not fulfil the minimum ratio of 0.4 after they are trimmed for testing. Since there was no any option, part of the binder courses had to be trimmed to make up for the minimum ratio requirement. This tends to result in inaccurate assessment of the resilient modulus values of the samples. As such, a new procedure was explored to test specimens smaller than 100 mm in diameter. This may minimize the material volume requirement from the field and also for the fabrication of smaller samples in the laboratory. Based on the available thickness of wearing course or overlay, the appropriate sizes were determined. For a two-layer system a 56.3 mm diameter was deemed necessary while a 37.5 mm diameter was observed to be appropriate for a three-layer system. Such an approach for resilient modulus test using miniature specimens of 56.3 mm and 37.5 mm in diameter has a great potential for practical relevance for the industry.","PeriodicalId":62390,"journal":{"name":"交通与运输工程:英文版","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44322884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of Manual Traffic Control in Directing Traffic Operations for Major Special Events: Clemson University Football Game Day Experience 人工交通控制在重大特殊活动交通指挥中的评价：克莱姆森大学足球赛日经验

交通与运输工程:英文版 Pub Date : 2020-05-20 DOI: 10.11648/J.AJTTE.20200502.11

Gowtham Cherukumalli, W. Sarasua, Stephen Fry, W. Davis

{"title":"Evaluation of Manual Traffic Control in Directing Traffic Operations for Major Special Events: Clemson University Football Game Day Experience","authors":"Gowtham Cherukumalli, W. Sarasua, Stephen Fry, W. Davis","doi":"10.11648/J.AJTTE.20200502.11","DOIUrl":"https://doi.org/10.11648/J.AJTTE.20200502.11","url":null,"abstract":"Crowd ingress and egress occurring before and after large special events results in oversaturation of the traffic network and is a crucial issue event planners and transportation officials must address. Because intersections constitute the greatest restraint in network traffic flows, efficient operation during special event peak flows is crucial. This research focuses on evaluating how well traffic control officers optimize intersection operations during heavily oversaturated conditions associated with large-scale special events. Network traffic data, including volumes, queues, and traffic officer signal/right-of-way phase times, were collected before and after four Clemson University home football games during the 2014 and 2015 season. Actual traffic count volumes were adjusted to account for vehicle queues and used to develop optimal signal timings using Synchro. These results are compared to field-observed intersection operation using officer directed hand-signaling and officer traffic signal pushbutton operation. A microscopic VISSIM model was also created for both manual control and optimized control scenarios to determine average delays for each approach and to improve the interpretation of macroscopic Synchro results. Findings indicate that traffic officers perform well in near saturated conditions; however, optimized signal timings provide reduced approach delay and overall intersection delay in heavily oversaturated conditions. The paper includes recommendations on how traffic officers can improve intersection performance. The paper also describes how results from data collection, analysis, and simulation modeling have been used to make recommendations to law enforcement in evaluating traffic operations and identifying improvements. Intersection control is crucial to the implementation of the overall traffic management plan, and the research findings provide insight to the effectiveness of law enforcement control of intersection operations.","PeriodicalId":62390,"journal":{"name":"交通与运输工程:英文版","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46797912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effective Measure for Accident Prevention Onboard Sea Vessels—Improvements on 4M4E Analysis 海上船舶事故预防的有效措施——4M4E分析的改进

交通与运输工程:英文版 Pub Date : 2020-04-28 DOI: 10.17265/2328-2142/2020.02.001

Yoshiaki Kunieda, Anju Ino, Hideyuki Kashima, K. Murai

引用次数: 0

Patterns of Correlation between Aviation, Education, and Economic Growth in Developing Economies 发展中经济体中航空、教育与经济增长的相关模式

交通与运输工程:英文版 Pub Date : 2020-04-28 DOI: 10.17265/2328-2142/2020.02.005

WaliMughni

引用次数: 1

Probability Distribution and Their Non-linear Relationship between Node Degree and Clustering Coefficient of Aviation Network of China Based on Complex Network 基于复杂网络的中国航空网络节点度与聚类系数的概率分布及其非线性关系

交通与运输工程:英文版 Pub Date : 2020-04-28 DOI: 10.17265/2328-2142/2020.02.002

Cheng Xiangjun, Yu Aihui, Chen Xumei

引用次数: 0

Planning and Sustainable Urban Mobility Plans: Parallel Orbits or Incompatible Paths? 规划和可持续城市交通计划:平行轨道还是不相容路径?

交通与运输工程:英文版 Pub Date : 2020-04-28 DOI: 10.17265/2328-2142/2020.02.003

M. Markatou

{"title":"Planning and Sustainable Urban Mobility Plans: Parallel Orbits or Incompatible Paths?","authors":"M. Markatou","doi":"10.17265/2328-2142/2020.02.003","DOIUrl":"https://doi.org/10.17265/2328-2142/2020.02.003","url":null,"abstract":"The paper that follows analyzes the basic directions of the Larissa’s Sustainable Urban Mobility Plan and aims at developing a first kind of assessment in relation to whether the plan has achieved its main objectives and how it interacts with the existing urban plot. First results show that emphasis is given to “alternative and more environmentally friendly kinds of circulation” and the emergence of the “neighborhood” as the main spatial scale of reference. The plan tries to manage the traffic issue of the city center, unsuccessfully so far. However, it does not take into account the spatial dimension of land uses. The networking of important functions and service providers is not a priority and, as a general conclusion, the plan does not serve the principle of integration neither guarantees the universal access to basic destinations and services. The paper argues that the plan could be improved by introducing a “bottom-up” design process, incorporating elements of the new and emerging agenda of “urban problems” (e.g. resilience targets) and moving away from the unification of “embellishment” and face the main issues of the real city. Those should be the priorities of the so called “combined and integrated design and planning practices”, which are now missing.","PeriodicalId":62390,"journal":{"name":"交通与运输工程:英文版","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47651199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Ontology-Based Approach for Human Competency Gap Analysis in Air Traffic Management: A Case Study of Georgia 基于本体的空中交通管理人员能力差距分析方法:以乔治亚州为例

交通与运输工程:英文版 Pub Date : 2020-04-28 DOI: 10.17265/2328-2142/2020.02.004

Nika Tikanashvili, I. Kabashkin

{"title":"Ontology-Based Approach for Human Competency Gap Analysis in Air Traffic Management: A Case Study of Georgia","authors":"Nika Tikanashvili, I. Kabashkin","doi":"10.17265/2328-2142/2020.02.004","DOIUrl":"https://doi.org/10.17265/2328-2142/2020.02.004","url":null,"abstract":"The Global Air Navigation Plan is a flexible global engineering approach that allows all States to advance their Air Navigation capacities based on their specific operational requirements. Aviation professionals have an essential role in the transition to, and successful implementation of the GANP. The research work is focused on the creation of methodology for the partial automation of the comparison competences of Air Traffic Management (ATM) personal and synthesis of training courses and modules, using a formal, ontology-based approach as a tool to solve these problems. One of the problems in the implementation of the GANP is that, on the one hand, there are currently no unified requirements for all categories of ATM personnel, and on the other hand, the development of ATM technologies is far ahead of the pace of training of personnel of appropriate qualifications. This problem becomes even more noticeable in countries that have just started an active modernization of ATC systems and do not have enough experience in this field. The paper describes the general methodological approach based on the education ontology modelling for human competency gap analysis in ATM and for gap analysis between the university curricula outcomes and the ATM requirements. The ontology of key personnel competencies issues for the design and integration of large-scale future ATM programmes is proposed.","PeriodicalId":62390,"journal":{"name":"交通与运输工程:英文版","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46833235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparing of Aviation Network Structure of Mid-south, Northwest and Southwest of China Based on Hierarchical Index Model 基于层次指数模型的中南、西北、西南地区航空网络结构比较

交通与运输工程:英文版 Pub Date : 2020-02-28 DOI: 10.17265/2328-2142/2020.01.002

Cheng Xiangjun, Yang Fang, Xie Li

{"title":"Comparing of Aviation Network Structure of Mid-south, Northwest and Southwest of China Based on Hierarchical Index Model","authors":"Cheng Xiangjun, Yang Fang, Xie Li","doi":"10.17265/2328-2142/2020.01.002","DOIUrl":"https://doi.org/10.17265/2328-2142/2020.01.002","url":null,"abstract":"In order to compare the aviation network of mid-south, northwest and southwest of China to reveal the structure similarity and difference for providing quantitative evidence to construct regional aviation network and improve its structure, hierarchical index model of regional aviation network was established through dividing the aviation network into layers to research its structure characters. Data matrixes were defined to record the basic state of regional aviation network. Index matrixes were constructed to describe the quantitative features of regional aviation network. On the basis of these indexes, several structure indexes of all layers of aviation network were calculated to show the structure features of aviation network, such as ratio of passenger volume within the region with across the region, share rate of passenger volume among layers, ratio of average number of airline for each airport, ratio of average passenger volume for each airline and ratio of airline rate. According to the statistical data, similar structure of share rate of passenger volume among layers and average passenger volume for each airline in their regional aviation network was found after calculating. But on the side of ratio of passenger volume within the region with across the region, ratio of average number of airlines for each airport and ratio of airline rate were different.","PeriodicalId":62390,"journal":{"name":"交通与运输工程:英文版","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47131643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1