Browsing by Author "Dorosh, Andrii S."
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Item Crisis and Risk Engineering for Transport Services(Talcom, Kyiv, 2022) Chernova, Nataliia S.; Hajiyev, Nofal; Halan, Olha; Matsiuk, Viacheslav; Bulgakova, Iuliia; Khurshudov, Ilgar; Najimov, Arif; Valiyeva, Sapargul; Hudaygulyyev, Nuraly; Demchenko, Yevhen B.; Dorosh, Andrii S.; Khara, Maryna; Nikolaienko, Iryna; Lyamzin, Andrii; Samsonkin, Valerii; Meredova, Maral; Halmamedov, Habib; Yurchenko, Oksana; Myradov, Yolly; Garajayev, Atageldi; Dashdamirov, Fuad; Zohrabov, Nijat; Sharifov, Allahverdi; Chernova, Nataliia S.; Lewczuk, KonradENG: Materials of scientific and practical research within the framework of the implementation of the project of the program of the European Union Erasmus+ «Crisis and Risks Engineering for Transport Services» (CRENG) are presented in the monograph. Issues of the impact of crisis situations on the work of transport enterprises and ways to increase the efficiency of the functioning of transport and logistics systems in conditions of crises and risks are considered. The publication is intended for scientific and pedagogical workers, graduate students and students of higher education, as well as managers and specialists of industrial enterprises and business structures, who are interested in the current state and prospects of the development of scientific research.Item Determination of Braking Optimal Mode of Controlled Cut of Design Group(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Діпропетровськ, 2015) Dorosh, Andrii S.ENG: Purpose. The application of automation systems of breaking up process on the gravity hump is the efficiency improvement of their operation, absolute provision of trains breaking up safety demands, as well as improvement of hump staff working conditions. One of the main tasks of the indicated systems is the assurance of cuts reliable separation at all elements of their rolling route to the classification track. This task is a sophisticated optimization problem and has not received a final decision. Therefore, the task of determining the cuts braking mode is quite relevant. The purpose of this research is to find the optimal braking mode of control cut of design group. Methodology. In order to achieve the purpose is offered to use the direct search methods in the work, namely the Box complex method. This method does not require smoothness of the objective function, takes into account its limitations and does not require calculation of the function derivatives, and uses only its value. Findings. Using the Box method was developed iterative procedure for determining the control cut optimal braking mode of design group. The procedure maximizes the smallest controlled time interval in the group. To evaluate the effectiveness of designed procedure the series of simulation experiments of determining the control cut braking mode of design group was performed. The results confirmed the efficiency of the developed optimization procedure. Originality. The author formalized the task of optimizing control cut braking mode of design group, taking into account the cuts separation of design group at all elements (switches, retarders) during cuts rolling to the classification track. The problem of determining the optimal control cut braking mode of design group was solved. The developed braking mode ensures cuts reliable separation of the group not only at the switches but at the retarders of brake position. Practical value. The developed procedure can be successfully used to determine the optimal braking modes of cuts in automation systems of trains breaking up on the gravity humps.Item Influence Research of Traffic Prediction Accuracy on Effective Management of the Trains Breaking-Up Order(Silesian University of Tecnology, Katowice, Poland, 2016) Bardas, Oleksandr O.; Skovron, Ihor Ya.; Demchenko, Yevhen B.; Dorosh, Andrii S.ENG: The article presents the research results of management processes in order of trains breaking-up on marshalling yards. The objective of this article is determination the area of rational use of trains breaking-up order models. Model of trains breaking-up order selection is formalized in the form of stochastic programming task. With the help of simulation modeling was obtained the dependence, describing the impact of trains arrival forecasting error and sizes of car traffic processing on reducing operating costs of the marshalling yards through the management of trains breaking-up order. The investigations can establish the requirements for accuracy of information support of operational planning tasks necessary for achieving the desired economic effect of the management of trains breaking-up order.Item New Challenges for Risk and Crisis Management of Transport Systems(Talcom, Kyiv, 2022) Demchenko, Yevhen B.; Dorosh, Andrii S.ENG: Materials of scientific and practical research within the framework of the implementation of the project of the program of the European Union Erasmus+«Crisis and Risks Engineering for Transport Services» (CRENG) are presented in the monograph. Issues of the impact of crisis situations on the work of transport enterprises and ways to increase the efficiency of the functioning of transport and logistics systems in conditions of crises and risks are considered. The publication is intended for scientific and pedagogical workers, graduate students and students of higher education, as well as managers and specialists of industrial enterprises and business structures, who are interested in the current state and prospects of the development of scientific research.Item Probabilistic Approach for the Determination of Cuts Permissible Braking Modes on the Gravity Humps(Silesian University of Technology, Poland, 2016) Bobrovskyi, Volodymyr I.; Kozachenko, Dmytro M.; Dorosh, Andrii S.; Demchenko, Evhen B.; Bolvanovska, Tetiana V.; Kolesnyk, Anton I.ENG: The paper presents the research results of cuts braking modes on the gravity humps. The objective of this paper is developing the methods for assessment of braking modes of cuts under conditions of fuzziness of their rolling properties, as well as selecting the permissible starting speed range of cuts from retardant positions. As a criterion for assessing the modes of target control of cut rolling speed, it was proposed to use an average gap size on a classification track at the established norms of probable exceeding of permissible speed of cars collision and their stop in retarders. As a criterion for evaluating the modes of interval control of cuts rolling speed, using the risk of their nonseparation on the switches was proposed. Using the simulation modeling and mathematical statistics, the configuration of the range of permissible speed of cuts coming out from retardant positions has been set. The conducted researches allow simplifying the choice of cut braking modes in systems of automatic control of cut rolling speed.Item Project Team Management and Personal Effectiveness(Talcom, Kyiv, 2022) Dorosh, Andrii S.; Chernova, Nataliia S.; Myradov, Yolly; Garajayev, AtageldiENG: Materials of scientific and practical research within the framework of the implementation of the project of the program of the European Union Erasmus+«Crisis and Risks Engineering for Transport Services» (CRENG) are presented in the monograph. Issues of the impact of crisis situations on the work of transport enterprises and ways to increase the efficiency of the functioning of transport and logistics systems in conditions of crises and risks are considered. The publication is intended for scientific and pedagogical workers, graduate students and students of higher education, as well as managers and specialists of industrial enterprises and business structures, who are interested in the current state and prospects of the development of scientific research.Item The Research of the Domain of Permissible Braking Modes of Cuts on the Gravity Humps(Silesian University of Technology, Katowice, 2015) Bobrovskyi, Volodymyr I.; Kozachenko, Dmitriy N.; Dorosh, Andrii S.; Demchenko, Evhen B.; Bolvanovska, Tetiana V.; Kolesnyk, Anton I.ENG: The paper presents the research results of cuts braking modes on the gravity humps. The objective of this paper is developing the methods for assessment of braking modes of cuts under conditions of fuzziness of their rolling properties, as well as select-ing the permissible starting speed range of cuts from retardant positions. As a criterion for assessing the modes of target control of cut rolling speed, it was proposed to use an aver-age gap size on a classification track at the established norms of probable exceeding of permissible speed of cars collision and their stop in retarders. As a criterion for evaluating the modes of interval control of cuts rolling speed, using the risk of their non-separation on the switches was proposed. Using the simulation modeling and mathematical statistics, the configuration of the domain of permissible speed of cuts coming out from retardant positions has been set. The conducted researches allow simplifying the choice of cut braking modes in systems of automatic control of cut rolling speed.Item Research of Traffic Prediction Accuracy Influence on the Effectiveness of Trains Breaking-Up Order Control(Silesian University of Technology, Poland, 2017) Bardas, Oleksandr O.; Skovron, Ihor Ya.; Demchenko, Yevhen B.; Dorosh, Andrii S.; Buriak, Serhii Yu.ENG: The article presents the research results of economic feasibility of trains’ breaking-up order control at marshalling yards. The article objective was to determine the area of rational use of trains’ breaking-up order model, formalized in the form of stochastic programming problem. As a effectiveness criterion of trains’ breaking-up order operating costs of marshalling yard were used, including the costs associated with cars’ and locomotives’ dwell time on the station and its approaches, as well as costs associated with additional shunting work. With the help of simulation modeling the dependence was obtained, describing the impact of trains’ arrival forecasting error and processed car volumes on reducing operating costs of the marshalling yards through the trains’ breaking-up order control. The studies enable us to establish the requirements for the accuracy of information support of operational planning tasks, which is necessary to achieve the desired economic effect of the trains’ breaking-up order control.