S. Turpak, L. Vasylieva, O. Padchenko, H. O. Lebid
{"title":"INCREASING OPERATION EFFECTIVITY OF METAL PRODUCTS LOADING POINTS BY THE RATIONAL USE OF BRIDGE CRANES","authors":"S. Turpak, L. Vasylieva, O. Padchenko, H. O. Lebid","doi":"10.15802/stp2019/195757","DOIUrl":"https://doi.org/10.15802/stp2019/195757","url":null,"abstract":"","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"174 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114449620","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}
B. Bodnar, A. B. Ochkasov, T. S. Grusheckyna, Y. B. Bodnar
Purpose. The main purpose of the work is to reduce the time for analysis and increase the efficiency of processing statistical information on assessing the locomotive fleet operation through the use of methods to reduce the data dimensionality. Methodology. To conduct the study, the methodology for constructing an arbitrary process index was chosen. Using the methodology allows selecting from the total set of parameters those components that are the most informative. Using the method of hierarchies analysis based on the obtained main components, it is possible to construct a single generalizing indicator. Findings . The approaches to improving the existing system of indicators for accounting the operation of locomotives were analyzed. The expediency of using dimensionality reduction methods to analyze the locomotive operation was substantiated. Using the method of main components, the most informative indicators of locomotive operation and the degree of their influence on the general level of traffic safety in locomotive economy, the implementation of the maintenance system are determined. The examples of the analysis of locomotive economy indicators using the proposed methodology, index of performance of maintenance system, traffic safety indices and operational safety in locomotive economy are given. The locomotive economy was analyzed through a joint review of the proposed integrated indices, as well as quantitative and qualitative indicators of the locomotive use. The difference between these indicators shows a deterioration or improvement in the traffic safety state, taking into account the volume of work performed. Increase in the operational traffic safety coefficient over the safety index shows a deterioration in the traffic safety state, despite a decrease in the absolute values of indicators characterizing the level of traffic safety in locomotive economy. Originality. For the first time, it was proposed to evaluate the traffic safety state in locomotive economy through the difference between the traffic safety and operational safety indices. Practical value. To analyze the operation of locomotive fleet, it is advisable to use the methods to reduce the data dimensionality. To assess the traffic safety state, it is more advisable to use the operational safety index, since it takes into account the volumetric performance indicators of locomotive economy.
{"title":"ASSESSMENT OF LOCOMOTIVE FLEET OPERATION USING THE METHODS OF DECREASING DIMENSIONS","authors":"B. Bodnar, A. B. Ochkasov, T. S. Grusheckyna, Y. B. Bodnar","doi":"10.15802/STP2019/195762","DOIUrl":"https://doi.org/10.15802/STP2019/195762","url":null,"abstract":"Purpose. The main purpose of the work is to reduce the time for analysis and increase the efficiency of processing statistical information on assessing the locomotive fleet operation through the use of methods to reduce the data dimensionality. Methodology. To conduct the study, the methodology for constructing an arbitrary process index was chosen. Using the methodology allows selecting from the total set of parameters those components that are the most informative. Using the method of hierarchies analysis based on the obtained main components, it is possible to construct a single generalizing indicator. Findings . The approaches to improving the existing system of indicators for accounting the operation of locomotives were analyzed. The expediency of using dimensionality reduction methods to analyze the locomotive operation was substantiated. Using the method of main components, the most informative indicators of locomotive operation and the degree of their influence on the general level of traffic safety in locomotive economy, the implementation of the maintenance system are determined. The examples of the analysis of locomotive economy indicators using the proposed methodology, index of performance of maintenance system, traffic safety indices and operational safety in locomotive economy are given. The locomotive economy was analyzed through a joint review of the proposed integrated indices, as well as quantitative and qualitative indicators of the locomotive use. The difference between these indicators shows a deterioration or improvement in the traffic safety state, taking into account the volume of work performed. Increase in the operational traffic safety coefficient over the safety index shows a deterioration in the traffic safety state, despite a decrease in the absolute values of indicators characterizing the level of traffic safety in locomotive economy. Originality. For the first time, it was proposed to evaluate the traffic safety state in locomotive economy through the difference between the traffic safety and operational safety indices. Practical value. To analyze the operation of locomotive fleet, it is advisable to use the methods to reduce the data dimensionality. To assess the traffic safety state, it is more advisable to use the operational safety index, since it takes into account the volumetric performance indicators of locomotive economy.","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"29 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129004270","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}
S. Raksha: ORCID 0000-0002-4118-1341; O. Kuropiatnyk: ORCID 0000-0001-5581-3883; O. Krasnoshchok: ORCID 0000-0002-0140-5179
{"title":"JUSTIFICATION OF CRITERIA FOR ROPEWAYS ENERGY EFFICIENCY","authors":"S. Raksha, O. Kuropiatnyk, O. Krasnoshchok","doi":"10.15802/STP2019/195601","DOIUrl":"https://doi.org/10.15802/STP2019/195601","url":null,"abstract":"S. Raksha: ORCID 0000-0002-4118-1341; O. Kuropiatnyk: ORCID 0000-0001-5581-3883; O. Krasnoshchok: ORCID 0000-0002-0140-5179","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121099276","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}
Цель . Авторы ставят целью определить отличия функциональных языков программирования, выявить возможности наиболее популярных языков путём их сравнения и анализа. Для выявления основных возможностей нужно рассмотреть их структуры данных, а также сферы применения. С помощью метрик сложности текстов программ провести анализ и сравнение примеров из различных сфер использования языков. Методика . Отобраны пять самых популярных специализированных функциональных языков программирования: Erlang, Lisp, F #, Scala и Haskel. Для получения информации о возможностях каждого из языков изучены их структуры данных, а также сферы применения, проведен обзор официальной документации. Экспериментальная база исследования сформирована из текстов существующих программных систем, полученных из открытого источника и подобранных по схожим направлениям применения и одинаковым объемам текста. Сравнительный анализ примеров программ выполнен по метрикам Холстеда, которые рассчитывают с помощью специально разработанного программного обеспечения. Анализ полученных оценок качества выполнен графическим способом. Результаты . Разработано программное обеспечение, которое позволяет получить метрики Холстеда, для входных текстов программ на таких языках функционального программирования, как Erlang, Lisp, F # и Scala. Сложность синтаксиса языка программирования Haskel не позволила использовать метрики для оценки текста, поэтому было проведено только рассмотрение возможностей по документации. С помощью сравнительного анализа показано различие языков и очерчены сферы их использования. Выполнено сравнение примеров разного объема из таких сфер использования, как задачи системного программирования, работа с графикой, математические расчеты, системы искусственного интеллекта, веб-программирование и т. п. Научная новизна. Авторы впервые провели сравнительный анализ специализированных языков с помощью метрик сложности текстов, который позволил установить, что язык Lisp имеет самый меньший словарь и длину кода, текст на Scala имеет наиболее структурированный вид, а F # и Erlang отмечаются излишней многословностью. Практическая значимость. Полученные выводы и измерения помогут при выборе наиболее эффективного языка функционального программирования для решения конкретных задач с учётом различий в сферах применения. Разработанное программное обеспечение позволяет выполнять измерения для разных текстов программ при разработке и сопровождения сложных программных систем.
{"title":"ANALYSIS OF MECHANISMS AND EFFICIENCY OF SPECIALIZED LANGUAGES OF FUNCTIONAL PROGRAMMING","authors":"I. M. Storchak, O. Ivanov","doi":"10.15802/stp2019/195581","DOIUrl":"https://doi.org/10.15802/stp2019/195581","url":null,"abstract":"Цель . Авторы ставят целью определить отличия функциональных языков программирования, выявить возможности наиболее популярных языков путём их сравнения и анализа. Для выявления основных возможностей нужно рассмотреть их структуры данных, а также сферы применения. С помощью метрик сложности текстов программ провести анализ и сравнение примеров из различных сфер использования языков. Методика . Отобраны пять самых популярных специализированных функциональных языков программирования: Erlang, Lisp, F #, Scala и Haskel. Для получения информации о возможностях каждого из языков изучены их структуры данных, а также сферы применения, проведен обзор официальной документации. Экспериментальная база исследования сформирована из текстов существующих программных систем, полученных из открытого источника и подобранных по схожим направлениям применения и одинаковым объемам текста. Сравнительный анализ примеров программ выполнен по метрикам Холстеда, которые рассчитывают с помощью специально разработанного программного обеспечения. Анализ полученных оценок качества выполнен графическим способом. Результаты . Разработано программное обеспечение, которое позволяет получить метрики Холстеда, для входных текстов программ на таких языках функционального программирования, как Erlang, Lisp, F # и Scala. Сложность синтаксиса языка программирования Haskel не позволила использовать метрики для оценки текста, поэтому было проведено только рассмотрение возможностей по документации. С помощью сравнительного анализа показано различие языков и очерчены сферы их использования. Выполнено сравнение примеров разного объема из таких сфер использования, как задачи системного программирования, работа с графикой, математические расчеты, системы искусственного интеллекта, веб-программирование и т. п. Научная новизна. Авторы впервые провели сравнительный анализ специализированных языков с помощью метрик сложности текстов, который позволил установить, что язык Lisp имеет самый меньший словарь и длину кода, текст на Scala имеет наиболее структурированный вид, а F # и Erlang отмечаются излишней многословностью. Практическая значимость. Полученные выводы и измерения помогут при выборе наиболее эффективного языка функционального программирования для решения конкретных задач с учётом различий в сферах применения. Разработанное программное обеспечение позволяет выполнять измерения для разных текстов программ при разработке и сопровождения сложных программных систем.","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132000637","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}
V. Petrenko, M. Netesa, O. Tiutkin, O. Gromova, V. Kozachyna
В. Петренко: ORCID 0000-0003-2201-3593; М. Нетеса: ORCID 0000-0003-1730-7642; О. Тютькін: ORCID 0000-0003-4921-4758; О. Громова: ORCID 0000-0002-5149-4165; В. Козачина: ORCID 0000-0002-6894-5532
V. Petrenko：ORCID 0000-0003-2201-3593; M. Netesa：ORCID 0000-0003-1730-7642; O. Tiutkin：ORCID 0000-0003-4921-4758; O. Hromova：ORCID 0000-0002-5149-4165; V. Kozachyn：ORCID 0000-0002-6894-5532.
{"title":"MODELING OF WASTE WATER TREATMENT IN VERTICAL SETTLER","authors":"V. Petrenko, M. Netesa, O. Tiutkin, O. Gromova, V. Kozachyna","doi":"10.15802/stp2019/195294","DOIUrl":"https://doi.org/10.15802/stp2019/195294","url":null,"abstract":"В. Петренко: ORCID 0000-0003-2201-3593; М. Нетеса: ORCID 0000-0003-1730-7642; О. Тютькін: ORCID 0000-0003-4921-4758; О. Громова: ORCID 0000-0002-5149-4165; В. Козачина: ORCID 0000-0002-6894-5532","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133709920","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}
Purpose. It is a very important issue to be able to determine the accurate particle degradation of railway ballast material. There are three different – but connecting – methodology for that: 1) full scale field tests, 2) full scale or reduced scale laboratory tests, 3) computer modelling, mainly with discrete element method (DEM). Options no. 1 and no. 2 need a lot of time and money, but for option no. 3 sophisticated software is needed that can consider the accurate micromechanical characteristics of ballast bed material. Methodology. In this paper the authors summarize their results related to modelling, having applied a software that uses DEM for calculation, as well as laboratory tests, namely uniaxial compression tests with reduced scale and computer tomography. Findings. The authors obtained the results that the uniaxial compression test in laboratory was able to be modelled by DEM software with an initial precision but in the future should be specified. The results are certified by measurements performed by computer tomography method. Originality. It is a very complicated issue to model the particle breakage of railway ballast not only particle movements in DEM software. There are many available software packages at the ‘market’, e.g. PFC, EDEM, YADE. Some of them are quite expensive, the others can be controlled by significantly difficult manner (special programming technique is needed, command line, etc.) The authors applied not only laboratory loading tests, but sophisticated computer tomography for their research. Practical value The results can be useful for railway engineering area. This article is a part of a PhD research at Szechenyi Istvan University, the PhD student is Erika Juhasz. Her aim is to develop a method to be able to determine the more accurate ballast breakage, as well as develop assessment methodology related to special measurement techniques (e.g. GOM techniques, computer tomography, etc.). The publishing of this paper was supported by UNKP–19-3–I–SZE–13 project.
{"title":"DISCRETE ELEMENT MODELLING OF PARTICLE DEGARDATION OF RAILWAY BALLAST MATERIAL WITH PFC3D SOFTWARE","authors":"E. Juhász, R. Movahedi, I. Fekete, S. Fischer","doi":"10.15802/STP2019/194472","DOIUrl":"https://doi.org/10.15802/STP2019/194472","url":null,"abstract":"Purpose. It is a very important issue to be able to determine the accurate particle degradation of railway ballast material. There are three different – but connecting – methodology for that: 1) full scale field tests, 2) full scale or reduced scale laboratory tests, 3) computer modelling, mainly with discrete element method (DEM). Options no. 1 and no. 2 need a lot of time and money, but for option no. 3 sophisticated software is needed that can consider the accurate micromechanical characteristics of ballast bed material. Methodology. In this paper the authors summarize their results related to modelling, having applied a software that uses DEM for calculation, as well as laboratory tests, namely uniaxial compression tests with reduced scale and computer tomography. Findings. The authors obtained the results that the uniaxial compression test in laboratory was able to be modelled by DEM software with an initial precision but in the future should be specified. The results are certified by measurements performed by computer tomography method. Originality. It is a very complicated issue to model the particle breakage of railway ballast not only particle movements in DEM software. There are many available software packages at the ‘market’, e.g. PFC, EDEM, YADE. Some of them are quite expensive, the others can be controlled by significantly difficult manner (special programming technique is needed, command line, etc.) The authors applied not only laboratory loading tests, but sophisticated computer tomography for their research. Practical value The results can be useful for railway engineering area. This article is a part of a PhD research at Szechenyi Istvan University, the PhD student is Erika Juhasz. Her aim is to develop a method to be able to determine the more accurate ballast breakage, as well as develop assessment methodology related to special measurement techniques (e.g. GOM techniques, computer tomography, etc.). The publishing of this paper was supported by UNKP–19-3–I–SZE–13 project.","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129029531","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}
V. Kozachyna, V. Shynkarenko, I. O. Bondarenko, V. A. Gabrinets, V. Horiachkin
В. Козачина: ORCID 0000-0002-6894-5532; В. Шинкаренко: ORCID 0000-0001-8738-7225; І. Бондаренко: ORCID 0000-0003-4717-3032; В. Габрінець: ORCID 0000-0002-6115-7162; В. Горячкін: ORCID 0000-0002-8952-952X;
V. Kozachyna：ORCID 0000-0002-6894-5532; V. Shynkarenko：ORCID 0000-0001-8738-7225; I. Bondarenko：ORCID 0000-0003-4717-3032; V. Gabrinets：ORCID 0000-0002-6115-7162; V. Goryachkin：ORCID 0000-0002-8952-952X；
{"title":"WATER CLEANING MODELING IN A HORIZONTAL SETTLER","authors":"V. Kozachyna, V. Shynkarenko, I. O. Bondarenko, V. A. Gabrinets, V. Horiachkin","doi":"10.15802/STP2019/184467","DOIUrl":"https://doi.org/10.15802/STP2019/184467","url":null,"abstract":"В. Козачина: ORCID 0000-0002-6894-5532; В. Шинкаренко: ORCID 0000-0001-8738-7225; І. Бондаренко: ORCID 0000-0003-4717-3032; В. Габрінець: ORCID 0000-0002-6115-7162; В. Горячкін: ORCID 0000-0002-8952-952X;","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131777334","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}
Purpose. As Ukraine actively develops its transport and logistics network taking into account the modern changes, the ever-increasing trade volume between the Europe and Asia, presents a good opportunity for increasing interoperability for the networks of international railway transportations. The study is aimed to consider in detail main components of railway interoperability and possible ways for achievement of their interaction. Methodology. The idea of interoperability was taken as a basis as a part of logistic system at railway. The crossing of different types of gauges was analyzed on the example of collaboration of Ukraine with European and Asian countries due to the increased freight traffic volume between them. Findings. Taking into account the basic technical parameters unifying the railway operation we found out the following principles: to agree upon a set of technical parameters, essential for the interoperability of the entire region; to determine the values and methods for agreement of the technical parameters to achieve technical interoperability; to decide on gradual implementation of technical interoperability, starting from the international corridors in a coordinated way depending on the priorities of international transportations. Originality. We considered the value of interoperability as a part of railway logistic systems. Practical value. The obtained results of search can be used during implementation of common platform of Ukraine`s collaboration with other countries related to the railway interoperability by establishing common base for work in prospective collaboration.
{"title":"THE ROLE OF UKRAINIAN RAILWAY TRANSPORT IN MODERN LOGISTIC PROCESSES","authors":"D. Lomotko, H. Prymachenko, Y. Hryhorova","doi":"10.15802/STP2019/184487","DOIUrl":"https://doi.org/10.15802/STP2019/184487","url":null,"abstract":"Purpose. As Ukraine actively develops its transport and logistics network taking into account the modern changes, the ever-increasing trade volume between the Europe and Asia, presents a good opportunity for increasing interoperability for the networks of international railway transportations. The study is aimed to consider in detail main components of railway interoperability and possible ways for achievement of their interaction. Methodology. The idea of interoperability was taken as a basis as a part of logistic system at railway. The crossing of different types of gauges was analyzed on the example of collaboration of Ukraine with European and Asian countries due to the increased freight traffic volume between them. Findings. Taking into account the basic technical parameters unifying the railway operation we found out the following principles: to agree upon a set of technical parameters, essential for the interoperability of the entire region; to determine the values and methods for agreement of the technical parameters to achieve technical interoperability; to decide on gradual implementation of technical interoperability, starting from the international corridors in a coordinated way depending on the priorities of international transportations. Originality. We considered the value of interoperability as a part of railway logistic systems. Practical value. The obtained results of search can be used during implementation of common platform of Ukraine`s collaboration with other countries related to the railway interoperability by establishing common base for work in prospective collaboration.","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129497410","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}
Мета роботі. У роботі передбачено проаналізувати основні відмінності української залізничної інфраструктури від інфраструктури країн, з якими Україна межує на західному кордоні, та країн, до яких може бути заведена колія 1 520 мм, враховуючи напрямок основного вантажопотоку зі Сходу на Захід. Також передбачено надати кількісну та якісну оцінку технічної сумісності та інших показників залізничних мереж відносно території України. Методика. Для отримання даних щодо інфраструктури й обсягів перевезень в окреслених завданням країнах проведено огляд світової літератури з теми роботи з використанням повнотекстових і статистичних баз даних. Методика передбачає аналіз і систематизацію отриманої інформації для встановлення відповідних залежностей, висновків і пропозицій. Результати. Доведено, що міжнародні перевезення, які здійснюються через територію України, мають певні особливості. Зміна стандартів залізничної колії на кордоні з європейськими країнами змушує шукати найбільш раціональні маршрути для транспортування вантажів (урахування дальності, технічного стану й параметрів міжнародного транспортного коридору (МТК), швидкості доставки тощо) і раціональні технології передачі вантажів на прикордонних пунктах, що дозволить вивести ці перевезення на інноваційний шлях розвитку. Наукова новизна. Базуючись на позитивному досвіді насамперед країн Європейського Союзу, автори показали, що за умови наявності ефективної транспортної мережі та розвинутої системи передачі вантажів у пунктах зміни стандартів залізничної інфраструктури значно підвищуються як внутрішні, так і транзитні вантажопотоки, що дає можливість збільшити привабливість країни в міжнародній системі перевезень. Практична значимість . На основі отриманих результатів показано, що залізничний транспорт України може бути інтегрований у європейську транспортну мережу за умови: виконання модернізації колії, штучних споруд та інших пристроїв, що входять до інфраструктури залізниці; упровадження нового рухомого складу, що забезпечить перевезення пасажирів денними поїздами з необхідним комфортом і максимально встановленою швидкістю.
{"title":"DIFFERENCE RESEARCH OF UKRAINIAN AND EUROPEAN RAILWAY INFRASTRUCTURE","authors":"M. Kurhan, V. Verbitskii, D. Kurhan","doi":"10.15802/STP2019/184497","DOIUrl":"https://doi.org/10.15802/STP2019/184497","url":null,"abstract":"Мета роботі. У роботі передбачено проаналізувати основні відмінності української залізничної інфраструктури від інфраструктури країн, з якими Україна межує на західному кордоні, та країн, до яких може бути заведена колія 1 520 мм, враховуючи напрямок основного вантажопотоку зі Сходу на Захід. Також передбачено надати кількісну та якісну оцінку технічної сумісності та інших показників залізничних мереж відносно території України. Методика. Для отримання даних щодо інфраструктури й обсягів перевезень в окреслених завданням країнах проведено огляд світової літератури з теми роботи з використанням повнотекстових і статистичних баз даних. Методика передбачає аналіз і систематизацію отриманої інформації для встановлення відповідних залежностей, висновків і пропозицій. Результати. Доведено, що міжнародні перевезення, які здійснюються через територію України, мають певні особливості. Зміна стандартів залізничної колії на кордоні з європейськими країнами змушує шукати найбільш раціональні маршрути для транспортування вантажів (урахування дальності, технічного стану й параметрів міжнародного транспортного коридору (МТК), швидкості доставки тощо) і раціональні технології передачі вантажів на прикордонних пунктах, що дозволить вивести ці перевезення на інноваційний шлях розвитку. Наукова новизна. Базуючись на позитивному досвіді насамперед країн Європейського Союзу, автори показали, що за умови наявності ефективної транспортної мережі та розвинутої системи передачі вантажів у пунктах зміни стандартів залізничної інфраструктури значно підвищуються як внутрішні, так і транзитні вантажопотоки, що дає можливість збільшити привабливість країни в міжнародній системі перевезень. Практична значимість . На основі отриманих результатів показано, що залізничний транспорт України може бути інтегрований у європейську транспортну мережу за умови: виконання модернізації колії, штучних споруд та інших пристроїв, що входять до інфраструктури залізниці; упровадження нового рухомого складу, що забезпечить перевезення пасажирів денними поїздами з необхідним комфортом і максимально встановленою швидкістю.","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129605176","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}
Purpose. Modern algorithms for choosing the shortest route, for example, the Bellman-Ford and Dijkstra algorithms, which are currently widely used in existing routing protocols (RIP, OSPF), do not always lead to an effective result. Therefore, there is a need to study the possibility of organizing routing in in the railway network of information and telecommunication system (ITS) using the methods of artificial intelligence. Methodology. On the basis of the simulation model created in the OPNET modeling system a fragment of the ITS railway network was considered and the following samples were formed: training, testing, and control one. For modeling a neural-fuzzy network (hybrid system) in the the MatLAB system the following parameters are input: packet length (three term sets), traffic intensity (five term sets), and the number of intermediate routers that make up the route (four term sets). As the resulting characteristic, the time spent by the packet in the routers along its route in the ITS network (four term sets) was taken. On the basis of a certain time of packet residence in the routers and queue delays on the routers making up different paths (with the same number of the routers) the optimal route was determined. Findings. For the railway ITS fragment under consideration, a forecast was made of the packet residence time in the routers along its route based on the neural-fuzzy network created in the MatLAB system. The authors conducted the study of the average error of the neural-fuzzy network`s training with various membership functions and according to the different methods of training optimization. It was found that the smallest value of the average learning error is provided by the neuro-fuzzy network configuration 3–12–60–60–1 when using the symmetric Gaussian membership function according to the hybrid optimization method. Originality . According to the RIP and OSPF scenarios, the following characteristics were obtained on the simulation model created in the OPNET simulation system: average server load, average packet processing time by the router, average waiting time for packets in the queue, average number of lost packets, and network convergence time. It was determined that the best results are achieved by the simulation network model according to the OSPF scenario. The proposed integrated routing system in the ITS network of railway transport, which is based on the neural-fuzzy networks created, determines the optimal route in the network faster than the existing OSPF routing protocol. Practical value. An integrated routing system in the ITS system of railway transport will make it possible to determine the optimal route in the network with the same number of the routers that make up the packet path in real time.
{"title":"OPTIMAL ROUTE DEFINITION IN THE RAILWAY INFORMATION NETWORK USING NEURAL-FUZZY MODELS","authors":"V. Pakhomova, Y. S. Mandybura","doi":"10.15802/STP2019/184385","DOIUrl":"https://doi.org/10.15802/STP2019/184385","url":null,"abstract":"Purpose. Modern algorithms for choosing the shortest route, for example, the Bellman-Ford and Dijkstra algorithms, which are currently widely used in existing routing protocols (RIP, OSPF), do not always lead to an effective result. Therefore, there is a need to study the possibility of organizing routing in in the railway network of information and telecommunication system (ITS) using the methods of artificial intelligence. Methodology. On the basis of the simulation model created in the OPNET modeling system a fragment of the ITS railway network was considered and the following samples were formed: training, testing, and control one. For modeling a neural-fuzzy network (hybrid system) in the the MatLAB system the following parameters are input: packet length (three term sets), traffic intensity (five term sets), and the number of intermediate routers that make up the route (four term sets). As the resulting characteristic, the time spent by the packet in the routers along its route in the ITS network (four term sets) was taken. On the basis of a certain time of packet residence in the routers and queue delays on the routers making up different paths (with the same number of the routers) the optimal route was determined. Findings. For the railway ITS fragment under consideration, a forecast was made of the packet residence time in the routers along its route based on the neural-fuzzy network created in the MatLAB system. The authors conducted the study of the average error of the neural-fuzzy network`s training with various membership functions and according to the different methods of training optimization. It was found that the smallest value of the average learning error is provided by the neuro-fuzzy network configuration 3–12–60–60–1 when using the symmetric Gaussian membership function according to the hybrid optimization method. Originality . According to the RIP and OSPF scenarios, the following characteristics were obtained on the simulation model created in the OPNET simulation system: average server load, average packet processing time by the router, average waiting time for packets in the queue, average number of lost packets, and network convergence time. It was determined that the best results are achieved by the simulation network model according to the OSPF scenario. The proposed integrated routing system in the ITS network of railway transport, which is based on the neural-fuzzy networks created, determines the optimal route in the network faster than the existing OSPF routing protocol. Practical value. An integrated routing system in the ITS system of railway transport will make it possible to determine the optimal route in the network with the same number of the routers that make up the packet path in real time.","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126058827","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}
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