{"title":"WIRELESS WI-FI SECURITY ANALYSIS IN AUTOMATED RAILWAY SYSTEMS","authors":"I. V. Zhukovyts’kyi, I. A. Pedenko","doi":"10.15802/stp2020/213042","DOIUrl":"https://doi.org/10.15802/stp2020/213042","url":null,"abstract":"","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133768934","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}
{"title":"FLAT CARS COUPLING DYNAMICS WHEN TRANSPORTING LONG CARGO","authors":"O. V. Shatunov, A. Shvets","doi":"10.15802/stp2020/213381","DOIUrl":"https://doi.org/10.15802/stp2020/213381","url":null,"abstract":"","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"45 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121012627","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}
{"title":"IMPROVEMENT OF THE STAND FOR COMPREHENSIVE DIAGNOSIS OF FREIGHT WAGON ASSEMBLIES","authors":"V. Ravlyuk","doi":"10.15802/stp2020/213444","DOIUrl":"https://doi.org/10.15802/stp2020/213444","url":null,"abstract":"","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124870677","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}
{"title":"DETERMINATION OF THE LONGITUDINAL LOAD OF SUPPORTING STRUCTURE OF THE FLAT CAR LOADED WITH A PIGGYBACK","authors":"O. Fomin, A. Lovska, M. Horbunov, Y. Fomina","doi":"10.15802/stp2020/213449","DOIUrl":"https://doi.org/10.15802/stp2020/213449","url":null,"abstract":"","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125961438","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}
{"title":"MATHEMATICAL PREDICTION OF THE PROPERTIES OF SUPERALLOYS","authors":"A. Glotka, V. Ol’shanetskii, S. Haiduk","doi":"10.15802/stp2020/213420","DOIUrl":"https://doi.org/10.15802/stp2020/213420","url":null,"abstract":"","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123971484","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}
{"title":"ESTIMATION METHODOLOGY OF HEATING THE CONTACT PLACE OF CONTACT WIRE WITH CONTACT STRIP OF PANTOGRAPH","authors":"А. Mukha, D. Ustymenko","doi":"10.15802/stp2020/213178","DOIUrl":"https://doi.org/10.15802/stp2020/213178","url":null,"abstract":"","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125788469","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. The main purpose of this article is to study the development of methods for organizing car traffic volumes into trains at the railways of the Russian Empire and the USSR. Methodology. The studies were carried out based on an analysis of literary sources and methods of the theory of organization of operational work of railways. Findings. The methods for organizing car traffic volumes have gone a significant development path under the influence of changes in the working conditions of railway transport, the formation of control technology and mathematical methods of optimization. The emergence of scientific methods for organizing car traffic volumes in trains dates back to the times of the Russian Empire. A modern approach to the organization of car traffic volumes is based on the plan for the train formation, developed in the USSR in 1931–1945. The goal of the implementation of the train formation plan was to reduce railroad expenses for cargo transportations. The conditions for the implementation of this approach is that the railways are vertically integrated: they simultaneously operate the railway infrastructure, and are the carriers transporting goods in their cars, while there is no competition between the transport modes for freight traffic volumes. The formation of modern methods for solving the problem of organizing car traffic volumes was mainly performed in 1945–1952. The basis of these methods is the separation of the organization of car traffic volumes into separate subtasks and their sequential solution in a deterministic and static setting. In practice, the organization of car traffic volumes at the railways of the USSR was solved in the 1970–1980s using a computer. The transition of Ukraine to a market model of the economy has led to a significant change in the working conditions of railway transport, which requires a review of the principles of organizing car traffic volumes into trains. Originality. For the first time, based on a historical analysis of the development of methods for organizing car traffic volumes at the railways of the Russian Empire and the USSR, connections were established between the working conditions of railway transport and methods for organizing car traffic volumes into trains. Practical value lies in the fact that they indicate the need to change in Ukraine the organization of car traffic volumes in accordance with the current working conditions of railway transport and the chosen direction of reforming the railway transportation market.
{"title":"DEVELOPMENT OF CAR TRAFFIC VOLUMES ORGANIZATION METHODS IN THE RUSSIAN EMPIRE AND IN THE USSR","authors":"D. Kozachenko, O. Papakhov, Y. Hermaniuk","doi":"10.15802/stp2020/208934","DOIUrl":"https://doi.org/10.15802/stp2020/208934","url":null,"abstract":"Purpose. The main purpose of this article is to study the development of methods for organizing car traffic volumes into trains at the railways of the Russian Empire and the USSR. Methodology. The studies were carried out based on an analysis of literary sources and methods of the theory of organization of operational work of railways. Findings. The methods for organizing car traffic volumes have gone a significant development path under the influence of changes in the working conditions of railway transport, the formation of control technology and mathematical methods of optimization. The emergence of scientific methods for organizing car traffic volumes in trains dates back to the times of the Russian Empire. A modern approach to the organization of car traffic volumes is based on the plan for the train formation, developed in the USSR in 1931–1945. The goal of the implementation of the train formation plan was to reduce railroad expenses for cargo transportations. The conditions for the implementation of this approach is that the railways are vertically integrated: they simultaneously operate the railway infrastructure, and are the carriers transporting goods in their cars, while there is no competition between the transport modes for freight traffic volumes. The formation of modern methods for solving the problem of organizing car traffic volumes was mainly performed in 1945–1952. The basis of these methods is the separation of the organization of car traffic volumes into separate subtasks and their sequential solution in a deterministic and static setting. In practice, the organization of car traffic volumes at the railways of the USSR was solved in the 1970–1980s using a computer. The transition of Ukraine to a market model of the economy has led to a significant change in the working conditions of railway transport, which requires a review of the principles of organizing car traffic volumes into trains. Originality. For the first time, based on a historical analysis of the development of methods for organizing car traffic volumes at the railways of the Russian Empire and the USSR, connections were established between the working conditions of railway transport and methods for organizing car traffic volumes into trains. Practical value lies in the fact that they indicate the need to change in Ukraine the organization of car traffic volumes in accordance with the current working conditions of railway transport and the chosen direction of reforming the railway transportation market.","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123449977","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 . The article is aimed to carry out a structural analysis of the coupled straight-guiding crank-slide mechanism of variable structure gripping devices with external unilateral constraints. It is also necessary to determine the number of internal and external repeating connections in the contours of the mechanism at different stages of its functioning, to assess their possible perniciousness and to suggest ways to reduce them. Methodology . Achieving this goal is carried out based on the universal structural theory of Ozols mechanisms for analyzing the gripping device as a mechanism with geometric, internal and frictional holonomic external constraints. Ozols internal and external structural formulas are used. Findings . The eleven-link gripping device is built on the basis of coupled central parallelogram crank-slider mechanism with a driving cranks. Synchronous driving cranks act on elongated connecting rods connected to sliders and gripping clamp elements. Gripping clamp elements carry out plane-parallel movement. Structural analysis was performed using structural schemes for two states of the mechanism: before clamping the object and in the state of the clamped object. In the first state of the mechanism with kinematic pairs of class V, the one-movable scheme contains thirteen internal redundant constraints. In the second state of the mechanism, external constraints act and in the scheme another five additional external repeating constraints are formed. Their contour arrangement and possible consequences of their action are shown. Originality . Structural analysis of the coupled crank-slider mechanism of the gripping device as a mechanism of a variable structure with internal and external connections is carried out for the first time. It is performed contour analysis, search and elimination, as well as reduction of pernicious repeated connections in the internal and external contour of the mechanism. Practical value . Practical recommendations have been developed on changing the mobilities of sliding pairs to eliminate all repeated connections in the internal contours of the mechanism. To reduce the number of pernicious repeated connections, the introduction of a self-centering unloading coupling into the external contour of the mechanism is proposed.
{"title":"SEARCH AND ELIMINATION OF REPEATED CONNECTIONS IN THE SCHEME OF GUIDING SLIDE-CRANK MECHANISM OF THE GRIPPING DEVICE","authors":"R. P. Pogrebnyak, M. Pohrebniak","doi":"10.15802/stp2020/208261","DOIUrl":"https://doi.org/10.15802/stp2020/208261","url":null,"abstract":"Purpose . The article is aimed to carry out a structural analysis of the coupled straight-guiding crank-slide mechanism of variable structure gripping devices with external unilateral constraints. It is also necessary to determine the number of internal and external repeating connections in the contours of the mechanism at different stages of its functioning, to assess their possible perniciousness and to suggest ways to reduce them. Methodology . Achieving this goal is carried out based on the universal structural theory of Ozols mechanisms for analyzing the gripping device as a mechanism with geometric, internal and frictional holonomic external constraints. Ozols internal and external structural formulas are used. Findings . The eleven-link gripping device is built on the basis of coupled central parallelogram crank-slider mechanism with a driving cranks. Synchronous driving cranks act on elongated connecting rods connected to sliders and gripping clamp elements. Gripping clamp elements carry out plane-parallel movement. Structural analysis was performed using structural schemes for two states of the mechanism: before clamping the object and in the state of the clamped object. In the first state of the mechanism with kinematic pairs of class V, the one-movable scheme contains thirteen internal redundant constraints. In the second state of the mechanism, external constraints act and in the scheme another five additional external repeating constraints are formed. Their contour arrangement and possible consequences of their action are shown. Originality . Structural analysis of the coupled crank-slider mechanism of the gripping device as a mechanism of a variable structure with internal and external connections is carried out for the first time. It is performed contour analysis, search and elimination, as well as reduction of pernicious repeated connections in the internal and external contour of the mechanism. Practical value . Practical recommendations have been developed on changing the mobilities of sliding pairs to eliminate all repeated connections in the internal contours of the mechanism. To reduce the number of pernicious repeated connections, the introduction of a self-centering unloading coupling into the external contour of the mechanism is proposed.","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128095653","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}
{"title":"RESEARCH OF TWO APPROACHES TO DETECT NETWORK ATTACKS USING NEURAL NETWORK TECHNOLOGIES","authors":"V. Pakhomova, M. S. Konnov","doi":"10.15802/stp2020/208233","DOIUrl":"https://doi.org/10.15802/stp2020/208233","url":null,"abstract":"","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124209213","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. The purpose of the work is the development, analysis and selection of layout schemes for passenger cars according to the number and location of enclosed platforms and sanitary facilities for creating promising competitive sleeping cars of various comfort levels and assessing the prospects of mastering their mass production in terms of ensuring maximum capacity. Methodology . An analysis of the layout schemes and planning of existing sleeping cars of various European manufacturers and layout schemes of promising cars in terms of size, number and placement of enclosed platforms and sanitary facilities was carried out according to the proposed criteria and performance for the efficiency of design solutions and the comfort of cars. Findings . Designed layout schemes of promising sleeping cars equipped with two or one enclosed platform and three or four sanitary facilities for general use – lavatory rooms, lavatory rooms combined with shower racks or shower cabins and separate shower cabins. A technique is proposed for assessing the efficiency of the developed design solutions and the comfort of promising sleeping cars in terms of the number, purpose and location of sanitary facilities and the ease of their use by passengers. Based on the analysis of the proposed layout schemes, their optimal variants were selected, recommended for creating promising competitive sleeping cars of a substantially higher comfort level. Originality . For the first time, an analysis of existing and new layout schemes of passenger sleeping cars by the number and placement of enclosed platforms and the number, types and placement of public sanitary facilities based on the developed methodology for an objective assessment of the efficiency of layout solutions, levels of car comfort and ease of their use by passengers. Practical value of the work lies in the possibility of a reasonable choice already at the stage of development of outline proposals for optimal layout schemes for creating promising competitive sleeping cars of different classes of increased comfort levels.
{"title":"ANALYSIS OF LAYOUT SCHEMES OF SLEEPING CARS","authors":"S. Voytkiv","doi":"10.15802/stp2020/208269","DOIUrl":"https://doi.org/10.15802/stp2020/208269","url":null,"abstract":"Purpose. The purpose of the work is the development, analysis and selection of layout schemes for passenger cars according to the number and location of enclosed platforms and sanitary facilities for creating promising competitive sleeping cars of various comfort levels and assessing the prospects of mastering their mass production in terms of ensuring maximum capacity. Methodology . An analysis of the layout schemes and planning of existing sleeping cars of various European manufacturers and layout schemes of promising cars in terms of size, number and placement of enclosed platforms and sanitary facilities was carried out according to the proposed criteria and performance for the efficiency of design solutions and the comfort of cars. Findings . Designed layout schemes of promising sleeping cars equipped with two or one enclosed platform and three or four sanitary facilities for general use – lavatory rooms, lavatory rooms combined with shower racks or shower cabins and separate shower cabins. A technique is proposed for assessing the efficiency of the developed design solutions and the comfort of promising sleeping cars in terms of the number, purpose and location of sanitary facilities and the ease of their use by passengers. Based on the analysis of the proposed layout schemes, their optimal variants were selected, recommended for creating promising competitive sleeping cars of a substantially higher comfort level. Originality . For the first time, an analysis of existing and new layout schemes of passenger sleeping cars by the number and placement of enclosed platforms and the number, types and placement of public sanitary facilities based on the developed methodology for an objective assessment of the efficiency of layout solutions, levels of car comfort and ease of their use by passengers. Practical value of the work lies in the possibility of a reasonable choice already at the stage of development of outline proposals for optimal layout schemes for creating promising competitive sleeping cars of different classes of increased comfort levels.","PeriodicalId":120413,"journal":{"name":"Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121699651","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：