Transport Problems最新文献_第5页

ANALYSIS OF THE RUNNING OF LONG-DISTANCE TRAINS ON NON-ELECTRIFIED LINES IN POLAND 波兰非电气化线路长途列车运行情况分析

IF 0.7

Transport Problems Pub Date : 2023-03-01 DOI: 10.20858/tp.2023.18.1.02

Wojciech Kamiński

引用次数: 0

CHANGES IN THE PERCEPTION OF TELEMATICS TECHNOLOGY BY ROAD TRANSPORT COMPANIES: AN EMPIRICAL ANALYSIS IN 2020-21 道路运输公司对远程信息处理技术感知的变化:2020-21年的实证分析

IF 0.7

Transport Problems Pub Date : 2023-03-01 DOI: 10.20858/tp.2023.18.1.01

W. Zalewski, M. Osińska, Mirosława Żurek

{"title":"CHANGES IN THE PERCEPTION OF TELEMATICS TECHNOLOGY BY ROAD TRANSPORT COMPANIES: AN EMPIRICAL ANALYSIS IN 2020-21","authors":"W. Zalewski, M. Osińska, Mirosława Żurek","doi":"10.20858/tp.2023.18.1.01","DOIUrl":"https://doi.org/10.20858/tp.2023.18.1.01","url":null,"abstract":"We present a novel study concerning the attitudes of road transport enterprises towards a broad application of telematics in operational management in road transportation. The study aims to assess telematics application in road transport and its changes over time while showing the factors most likely to determine the systems’ use. Unobserved categories defined in the technology acceptance model (TAM) are adjusted to measure perceived usefulness, perceived ease of use, and attitudes toward using telematics systems by road transport managers. The study is based on 323 transport enterprises analyzed in two waves in 2020 and 2021. The use of two different time points is motivated by an observed increase in the digitalization of transport documents caused by the COVID-19 pandemic. The empirical findings support the TAM’s usefulness in evaluating IT in transport business management. The findings also reveal that the significantly increased telematics use in 2020 was observed while it was endured. The results are checked for robustness and used for simulations. The study compares managers’ behaviors over time and simulates the effect of individual (observed) variables on unobserved TAM categories.","PeriodicalId":45193,"journal":{"name":"Transport Problems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45597589","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

ALGORITHM FOR THE EXTRACTION OF SELECTED RAIL TRACK BALLAST DEGRADATION USING MACHINE VISION 基于机器视觉的轨道道碴劣化提取算法

IF 0.7

Transport Problems Pub Date : 2023-03-01 DOI: 10.20858/tp.2023.18.1.11

P. Lesiak, P. Bojarczak, Aleksander Sokołowski

{"title":"ALGORITHM FOR THE EXTRACTION OF SELECTED RAIL TRACK BALLAST DEGRADATION USING MACHINE VISION","authors":"P. Lesiak, P. Bojarczak, Aleksander Sokołowski","doi":"10.20858/tp.2023.18.1.11","DOIUrl":"https://doi.org/10.20858/tp.2023.18.1.11","url":null,"abstract":"A number of physical methods are used to survey railway track ballast to assess its degradation as a function of deposition. Simulation tests on track models are also conducted. These testing methods, which are generally labour-intensive and expensive, provide an accurate understanding of the extent of ballast degradation. However, the impact of inadequate maintenance can be observed, even on the surface. Therefore, it seems natural in this case to use image registration. State-of-the-art machine vision systems of track geometry cars provide the means to do this. Obtained ballast images provide a baseline for evaluating its level in relation to sleepers. However, no information is available on other signs of track degradation, such as overgrown vegetation (weeds) or the so-called local muddy areas, which are generally a consequence of poor drainage and a lack of subgrade insulation. These degradations are observed to generate distinctive colour images that are superimposed on the overall image of the ballast surface. They differ in colour and shape. Hence, the authors used this phenomenon to develop an algorithm for the extraction of ballast degradation images based on RGB imaging. Surface descriptors have also been offered to assess these degradations. Extensive measurement material from the railway lines was used to conduct survey experiments based on the examples. The results clearly demonstrate the high success rate of the applied method.","PeriodicalId":45193,"journal":{"name":"Transport Problems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46911677","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 WALKABILITY ON GULANGYU BASED ON RESIDENTS' PERCEPTIONS 基于居民感知的鼓浪屿可步行性评价

IF 0.7

Transport Problems Pub Date : 2023-03-01 DOI: 10.20858/tp.2023.18.1.17

Yi Shi, Y. A. S. Harumain, Hazrina Haja Bava Mohidin

引用次数: 0

HAZARD AND RISK ANALYSIS OF RAILWAY VEHICLE CONTROL SYSTEMS ACCORDING TO SAFETY INTEGRITY LEVELS 基于安全完整性等级的轨道车辆控制系统危害与风险分析

IF 0.7

Transport Problems Pub Date : 2023-03-01 DOI: 10.20858/tp.2023.18.1.15

G. Kaczor, M. Szkoda, M. Machno

{"title":"HAZARD AND RISK ANALYSIS OF RAILWAY VEHICLE CONTROL SYSTEMS ACCORDING TO SAFETY INTEGRITY LEVELS","authors":"G. Kaczor, M. Szkoda, M. Machno","doi":"10.20858/tp.2023.18.1.15","DOIUrl":"https://doi.org/10.20858/tp.2023.18.1.15","url":null,"abstract":"This article presents an approach to the verification of the safety integrity level (SIL) of rail vehicle subassemblies in accordance with the applicable railway standards PN-EN ISO 50126-1, PN-EN ISO 50126:2, and PN-EN ISO 50129. Particular attention has been given to the calculation procedure related to the determination of the tolerable hazard rate and tolerable functional failure rate indicators in a situation where various reliability indicators have been declared for components of rail vehicles, such as MTTFD or B10D. In this case, the verification of the safety integrity level using the above-mentioned railway standards may be difficult, and it becomes necessary to use additional standards for safety systems based on electronic components. An example is the PN-EN ISO 13849-1:2006-01 standard, which contains a calculation method based on the transformation of the exponential model, which is useful for hazard and risk analyses of electronic systems containing components with different reliability indices. Another supplementary standard is the PN-EN 61025:2007 standard, which concerns fault tree analysis. Based on the above-mentioned standards, an algorithm was developed to verify the safety integrity level of the frequency converter control system. The obtained results allowed us to confirm the fulfillment of the functional safety requirements of the considered system.","PeriodicalId":45193,"journal":{"name":"Transport Problems","volume":"102 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67728518","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

PASSENGERS’ PERCEPTIONS OF THE SERVICE QUALITY AND OPERATION OF A BUS RAPID TRANSIT SYSTEM (TRANS SEMARANG) IN SEMARANG, INDONESIA 乘客对印尼三宝垄快速公交系统(trans semarang)服务质量和运营的看法

IF 0.7

Transport Problems Pub Date : 2023-03-01 DOI: 10.20858/tp.2023.18.1.12

Ruth Elgiana Ester Simangunsong, A. R. Rakhmatulloh, D. Dewi, Fadhilah Maretha Adrie, D. Nugraheni

{"title":"PASSENGERS’ PERCEPTIONS OF THE SERVICE QUALITY AND OPERATION OF A BUS RAPID TRANSIT SYSTEM (TRANS SEMARANG) IN SEMARANG, INDONESIA","authors":"Ruth Elgiana Ester Simangunsong, A. R. Rakhmatulloh, D. Dewi, Fadhilah Maretha Adrie, D. Nugraheni","doi":"10.20858/tp.2023.18.1.12","DOIUrl":"https://doi.org/10.20858/tp.2023.18.1.12","url":null,"abstract":"The increasing population in urban areas has expanded the role of the transportation system to meet people’s mobility needs in developing countries. Since the demand for transportation services is proliferating, bus rapid transit (BRT) offers the opportunity to create a high-quality mass transit system in developing countries. The presence of BRT Trans Semarang, however, has not yet become a solution to city traffic problems since the transit system and its operation are not yet implemented. This study aims to explore the service quality and operation of BRT based on observations and passengers’ viewpoints at the BRT shelter, which is located in the central business district. The method of the research is a statistical descriptive and qualitative analysis using variables from passengers’ perspectives and observations on bus operation. The result shows that the capacity of the transit shelter, the interval between bus arrivals, bus dwell times, and BRT infrastructures (door size) are the most influential variables on passengers’ satisfaction. Furthermore, from the operation point of view, users’ trip destinations and maximum delay times are considered important for the improvement of BRT service.","PeriodicalId":45193,"journal":{"name":"Transport Problems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44812376","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 VIBRATION AND NOISE CHARACTERISTICS OF A COMPRESSION-IGNITION ENGINE FUELLED WITH NATURAL GAS-BIODIESEL DUAL FUEL 天然气-生物柴油双燃料压缩点火发动机振动与噪声特性评价

IF 0.7

Transport Problems Pub Date : 2023-03-01 DOI: 10.20858/tp.2023.18.1.06

Saulius Stravinskas, Alfredas Rimkus, J. Matijošius

引用次数: 0

MODELLING THE COSTS OF POSTAL COMPANIES FOR THE DELIVERY OF GOODS TO CONSUMERS WITHIN THE LAST MILE 邮政公司在最后一英里内向消费者交付货物的成本建模

IF 0.7

Transport Problems Pub Date : 2023-03-01 DOI: 10.20858/tp.2023.18.1.03

Peter Jucha, T. Čorejová

引用次数: 0

A LOW-COST SYSTEM FOR SUPPORTING DRIVERS IN TRAFFIC JAMS 在交通堵塞时为司机提供支持的低成本系统

IF 0.7

Transport Problems Pub Date : 2023-03-01 DOI: 10.20858/tp.2023.18.1.09

Waldemar Hołubowski, R. Frankiewicz, Sławomir Kusiński, A. Sikora, A. Zielonka

引用次数: 0

CONVERGENCE TECHNOLOGY FOR VEHICLE PART SURFACE FINISHING 汽车零件表面加工的收敛技术

IF 0.7

Transport Problems Pub Date : 2023-03-01 DOI: 10.20858/tp.2023.18.1.10

Valeriy Sikulskiy, K. Maiorova, Y. Vorobiov, P. Fomichev, Svitlana Myronova

{"title":"CONVERGENCE TECHNOLOGY FOR VEHICLE PART SURFACE FINISHING","authors":"Valeriy Sikulskiy, K. Maiorova, Y. Vorobiov, P. Fomichev, Svitlana Myronova","doi":"10.20858/tp.2023.18.1.10","DOIUrl":"https://doi.org/10.20858/tp.2023.18.1.10","url":null,"abstract":"The subject of this research is convergence technology for the surface finishing of vehicle parts. A literature review has been conducted to carry out a comparative analysis of existing methods for the surface finishing of parts used in the manufacturing of aircraft, hydraulic and pneumatic devices, and other vehicles. Prospects are shown for further research on methods with the aim of creating a complex technology (i.e., convergence) that combines information technologies; nanotechnologies; and thermochemical, electrochemical, and mechanical processing methods. A method is proposed for selecting and combining surface finishing methods according to a five-point expert assessment, which allows the batch processing of vehicle parts. Based on this method, the concept of convergence technology for the surface finishing of vehicle parts is proposed, which includes the impulse thermal energy method, honing, superfinishing, and electrochemical processing. An expanded process is presented for manufacturing parts with high-precision, low-roughness surfaces and a specified microrelief by using electrochemical superfinishing and electrochemical honing. A scheme of the concentration (focusing) of the current flow during electrochemical superfinishing due to the movement of the electrode relative to the part surface is proposed, which enables the effect of surface polishing and the removal of oxidation products. Convergence technology for the surface finishing of vehicle parts will provide parts’ geometric dimensions with micro- and nano-precision and allow the precision machining of small-diameter holes and complex profiles, increased machining accuracy (up to 0.001 microns), the possibility of batch processing, and the possibility of process automation.","PeriodicalId":45193,"journal":{"name":"Transport Problems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45543287","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