Browsing by Author "Kudriashov, Andrii V."
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Item Development of a Simulation Model of a Cargo Customs Complex Operation as a Link of a Logistic Supply Chain(РС Тесhnology Сеntеr, Kharkiv, Ukraine, 2021) Mazurenko, Alexander; Kudriashov, Andrii V.; Lebid, Iryna H.; Luzhanska, Nataliia O.; Кravchenya, Irina N.; Pitsyk, MaksymENG: The main link in the logistics supply chain is the cargo customs complex. It provides customs and logistics services to cargo owners during the export and import of goods, complex services, placement of goods in a customs warehouse and a temporary storage warehouse. To substantiate the choice of the optimal logistics supply chain and optimize the work of the cargo customs complex, it is proposed to use simulation modeling. The model of operation of the logistics chain and the cargo customs complex is presented in a general form. The proposed model is implemented in the GPSS World simulation automation package. Testing the simulation model involved checking its adequacy. Checking the adequacy of the simulation model, which showed the maximum value of the t-statistic of 1.424 with a critical value of 1.85, proved its compliance with the work of a real object. After completing the adequacy check, the simulation error was estimated, which was 3 % with an allowable 5 %, due to the presence of pseudo-random number generators in the simulation model. Thus, the simulation error is insignificant for this study. For the cargo customs complex, an example of the simulation results is given. Based on the results of simulation modeling, it is possible to determine: the optimal type of the logistics supply chain and the optimal structure of the cargo customs complex. A wide range of tasks that the proposed simulation model can solve is presented. Thus, the developed simulation model will make it possible to analyze and improve the modes of operation of the cargo customs complex. In addition, it will allow to get an informed decision regarding the use of a certain type of logistics supply chain.Item Improvement of Customs and Logistics Services in Ukraine(Kaunas University of Technology, Kaunas, Lithuania, 2021) Lebid, Iryna H.; Luzhanska, Nataliia O.; Mazurenko, Oleksandr O.; Kudriashov, Andrii V.; Кravchenya, Iryna N.ENG: Ukraine has a significant transit potential, which is not fully realized. To increase the cargo transit volume, it is necessary to attract carriers by simplifying customs clearance formalities and offering additional logistics services. The paper considers the possibility of using a logistics chain providing customs and logistics services to the customer at cargo customs complexes in order to consolidate all necessary operations related to the export of goods in the country of origin to the maximum extent. Besides, it is also compared with existing logistics chain variations that are already operated.Item Improvement of the Effectiveness of the Process of Separation of Composition on the Sorting Humps(Дніпровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпро, 2019) Kudriashov, Andrii V.; Mazurenko, Oleksandr O.; Sharapaniuk, K.ENG:The purpose of the study is dedicated to improving the quality of sorting process using the developed method to determine rational regimes of the train breaking up. These modes provide maximum of reliability division of the wagon cuts at switches, as well as the possibility of implementing a safe speed collision of wagons in marshalling tracks. Methodology. Investigations of the separations of the cut of the train at switches were carried out using sim- ulation modeling. For research, we used the model for the running cut from sorting hump, which allows us to realize the set exit speeds from the brake positions when adjusting the braking zone of the cut. Findings. A quantitative as- sessment of the indicators of the sorting process was carried out using the developed method for optimizing the braking modes of the cuts to control the process of decomposition of trains on one of the sorting hump of Ukraine. The performed analysis of the results showed sufficient efficiency of the developed method, which can be recom- mended for calculating the exit speeds of cuts from brake positions in automation systems of the sorting process. The braking modes obtained as a result of optimization can provide a sufficiently high quality of interval regulation, as well as the possibility of realizing a safe approach speed of cuts to vagons on the sorting paths of automated humps. The scientific novelty of the work is to prove the effectiveness of the considered method of optimizing the composition breaking mode. Practical value of the thesis as well as developed models and methods can be used to create an automated process control system for breaking up of the stocks on sorting humps, as well as to assess the quality of the construction of projected sorting humps. Automation of humps will help to improve the economic per- formance of stations, reduce the cost of processing cars, save energy for braking cuts and hunting, improve working conditions and safety of workers of the sorting hump.