Modern technologies. System analysis. Modeling最新文献

{"title":"Decision-making in the conditions of partial uncertainty of background information when introducing speed traffic on existing lines","authors":"А. Дубровская, С. Миронов, T. Dubrovskaya, V. S. Mironov","doi":"10.26731/1813-9108.2020.3(67).126-133","DOIUrl":"https://doi.org/10.26731/1813-9108.2020.3(67).126-133","url":null,"abstract":"Decision making under uncertainty is based on the fact that the probabilities of different scenarios are unknown. In this case the subject is guided, on the one hand, by his risk preference, and on the other hand, by the criterion of selection from all alternatives according to the compiled “decision matrix”. Decision making under risk conditions is based on the fact that each situation can be given the probability of its realization. This allows you to weigh each of the efficiency values and choose the situation with the lowest risk level for implementation. Reconstructive measures to increase the speeds on the railway should be designed to provide the safety and uninterrupted operation of trains, reduce the time of passengers on the way, while ensuring the required volume of transportation and the lowest construction and operating costs. The solution of the tasks of designing the reconstruction of the railway is carried out on the basis of decision theory methods. The need to make decisions for which their predetermining conditions are not fully taken into account, as well as their subsequent influence, are encountered in all areas of technology, in particular, with the introduction of","PeriodicalId":175652,"journal":{"name":"Modern technologies. System analysis. Modeling","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130583481","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":"Interaction instructions as a method of the airport technological process efficiency improvement","authors":"","doi":"10.26731/1813-9108.2020.3(67).140-146","DOIUrl":"https://doi.org/10.26731/1813-9108.2020.3(67).140-146","url":null,"abstract":"","PeriodicalId":175652,"journal":{"name":"Modern technologies. System analysis. Modeling","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131041948","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":"Information entropy of systems of technical diagnostics of locomotives","authors":"П. Семенов, К. Лакин, Ю. Хромов, A. Semenov, I. K. Lakin, I. Khromov","doi":"10.26731/1813-9108.2020.3(67).42-53","DOIUrl":"https://doi.org/10.26731/1813-9108.2020.3(67).42-53","url":null,"abstract":"The article proposes a method of analyzing the information effectiveness of technical diagnostic systems. According to the proposed method, the information efficiency of the main types of locomotive diagnostic systems has been calculated. Systems of technical diagnostics are subject to the laws of dialectical cognition of objective reality, including the concepts of I. Kant “thing in itself” (noumenal world) and “thing for us” (phenomenal world). The noumenal world possesses entropy, the phenomenal world possesses information. The difference in diagnosis lies in the tion, performability and correct functioning of the unit under test. Thus, diagnosis is always carried out in conditions of limited information – the presence of entropy. Systems of technical diagnostics should be built as digital information systems using micropro-cessors and/or computers. Therefore, the article discusses automated systems of technical diagnostics. The information of the automated systems of technical diagnostics can be assessed through the efficiency factor as the ratio of informativity of automated systems of technical diagnostics to the entropy of the diagnostic object. When evaluating the information efficiency of automated systems of technical diagnostics, one should take into account the probability of each failure and the cost of eliminating it (restoring performance). The corresponding methodology was developed, according to which the information efficiency of various diagnostic systems was evaluated. It is proved that the effectiveness of on-board automated systems of technical diagnostics even after modifi-cation of the locomotive design does not completely exclude the use of depot stationary and portable diagnostics systems, including automated rheostat tests, vibration diagnostics and test and repairing stands of individual locomotive assemblies. The article’s ad-vantages lay in the fact that it can be used as guidelines for developing a system for maintenance and repair of complex systems with optimization of the use of automated systems of technical diagnostics.","PeriodicalId":175652,"journal":{"name":"Modern technologies. System analysis. Modeling","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128467214","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":"Application of phase locked loops in current and voltage discriminating elements of microprocessor-based relay protection devices","authors":"K. Menaker, M. V. Vostrikov, V. Tikhomirov","doi":"10.26731/1813-9108.2020.3(67).180-189","DOIUrl":"https://doi.org/10.26731/1813-9108.2020.3(67).180-189","url":null,"abstract":"The article discusses the possibility of implementing phase locked loops in discriminating elements of current and voltage in microprocessor-based relay protection devices. It is shown that the use of phase locked loops instead of digital filters makes it possible to reliably distinguish the first harmonic of the measured signal, track the change in frequency without using complex algorithms for determining the number of samples, and significantly simplify relay protection devices. For these purposes, the real oscillograms of the current and voltage at the output of the measuring transformers were considered. The signals were linear-ly interpolated with subsequent expansion in a Fourier series. The synthesis of the phase locked loop is carried out in the well-known program of electronic simulation \"Multisim 11.0\", the signals under study are synthesized, and a simulation check is conducted. The use of phase locked loops in order to isolate the first harmonic will make it possible to reduce the error due to precise adjustment of the frequency and phase of the controlled generator, which generates the first harmonic, to the phase and frequency of the measured signal coming from the output of the current or voltage transformer, as well as to simplify the existing relay protection scheme of the brand TsZA-27.5-FKS, reducing the number of its false responses. Experimental verification has confirmed that it is possible to use phase locked loops in microprocessor-based relay protection devices in practice as primary converters of current and voltage measuring devices. The studies conducted have also shown the feasibility of picking up the current signal without the use of measuring transformers by placing the measuring winding over the current conductor. This method eliminates distortions of the measured signal. However, it requires additional research due to the low signal level.","PeriodicalId":175652,"journal":{"name":"Modern technologies. System analysis. Modeling","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116952040","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":"Study of the influence of autonomous vehicles on transport network capacity","authors":"О. Полтавская, К. Каргапольцев, Андрей Павлович Хоменко, Y. Poltavskaya, S. K. K. tsev, A. P. Khomenko","doi":"10.26731/1813-9108.2020.3(67).146-152","DOIUrl":"https://doi.org/10.26731/1813-9108.2020.3(67).146-152","url":null,"abstract":"Transport infrastructure is an essential component of urban functioning that plays a major role in the economy, security and so-cial structure. In particular, the Russian road network is a component of all transportation in the country, because most of the cargo flows follow by automobile transport. Every year, the load on the street-city network increases with a geometric progres-sion. Urbanization of cities results in the fact that the throughput capacity of the road network does not satisfy the current and future needs of the region. The article considers the use of autonomous vehicles on public roads as one of the possible solutions to this problem. Technologies allow the movement of vehicles in compliance with a shorter distance at higher speeds, which will help increase the throughput capacity of the road network section without requiring any changes and reconstructions. In recent decades, significant progress has been made in the field of vehicle control and monitoring systems. Autonomous vehicles use a set (system) of sensors to scan the environment, and the built-in microprocessor monitors the braking, steering and speed systems. In the long term, this technology will be supplemented by the possibility of connecting autonomous vehicles with traffic control systems and other vehicles. This level of communication will facilitate the flow of autonomous vehicles in large groups, allowing one to maintain a minimum distance at high speed, while increasing road safety. This work presents simulation results, on the basis of which it can be concluded that an autonomous flow of vehicles can increase the throughput capacity of the road network by four times without the construction of additional lanes. The research results make is possible to develop a set of measures aimed at regulating these technologies in order to ensure the safe integration of autonomous vehicles with transport infrastructure.","PeriodicalId":175652,"journal":{"name":"Modern technologies. System analysis. Modeling","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129181461","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":"A method for continuous monitoring of the sliding contact joint during the movement of electric rolling stock","authors":"","doi":"10.26731/1813-9108.2020.3(67).10-16","DOIUrl":"https://doi.org/10.26731/1813-9108.2020.3(67).10-16","url":null,"abstract":"The article considers a method for continuous instantaneous control of a sliding contact joint exposed to alternating electric traction current, external factors, technical failures that cause sparking, the formation of an electric arc, and significant changes in the contact resistance on the contact wire on the section of the electric rolling stock, provided that the operation of the spectrum analyzer is coordinated with the position of the electric rolling stock on the track section.","PeriodicalId":175652,"journal":{"name":"Modern technologies. System analysis. Modeling","volume":" 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120827967","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":"Multivariate analysis in making managerial decisions on the removal of felling residues along the railway precinct","authors":"E. E. Altynnikova, A. Begunov, N. Russavskaya, V. V. Kashkowsky","doi":"10.26731/1813-9108.2020.3(67).90-100","DOIUrl":"https://doi.org/10.26731/1813-9108.2020.3(67).90-100","url":null,"abstract":"The article acknowledges the urgency of the problem of accumulation of felling residues along the railway precinct. One of the possible solutions is to use the methods of multivariate analysis. The results obtained within the framework of analytical dependencies and calcu-lations of the probabilistic choice indicate that the most favorable and economically profitable strategic decisions that have the minimum probability of negative consequences are the removal of felling residues, as well as the destruction of felling residues on site. The pre-sented analysis of modern technological methods for the disposal of wood and felling residues showed that a mechanical method for the disposal of residues using a mulcher is permitted and established at the road transport facilities. The working unit of the mulcher cuts out the vegetation cover, crushing the residues in the form of chips, and mixes them evenly with the top layer of the soil, thereby activating the rapid destruction. Wood chip and sawdust generated during this operational procedure can be recommended as a sorption material for capturing oil products used in wastewater of railway transport enterprises or for obtaining active coal from sawdust as a sorbent in the technologies for environmental safety. It is worth noting that the problem of regeneration of the used sorbent does not occur in this case, since the spent sorbent in the form of sawdust with impurities can be used as a fuel. The approaches proposed in the article also solve the resource conservation problem, which is also mentioned in the railway development strategy.","PeriodicalId":175652,"journal":{"name":"Modern technologies. System analysis. Modeling","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128664682","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":"The substantiation of design parameters of circular curves on high-speed railways","authors":"Санкт-Петербург, Российская Федерация","doi":"10.26731/1813-9108.2020.3(67).152-159","DOIUrl":"https://doi.org/10.26731/1813-9108.2020.3(67).152-159","url":null,"abstract":"This paper is about the methodology of rational design parameters of circular curves on high-speed railways for mixed traffic. The mixed traffic include high-speed and speeding passenger trains, and special freight trains. The methodology is based on mul-ti-criteria optimization and allows determining optimal design parameters of circular curves on high-speed railways for mixed traffic. Technical and economic factors, features of train movement with different speeds and masses on different circular curves are taking into account here. The methodology is resistant to possible traffic changes. Another feature of this methodology is the use of computer simulation of the interaction between the railway and rolling stock at the design railway stage. The results of simulation are used to create the mathematical interaction model of the circular curve parameters (radius and non-compensated acceleration) and lateral force. The values of lateral force allow excluding the circular curve parameters, in which special freight trains have negative effects on the railway track. This paper also discusses the possibility of a speed reduction of high-speed trains. The substantiation for lowering the speed of high-speed trains is based on the theory of games. The increase in freight traffic results in the necessity to reduce the speed of a high-speed train in order to avoid an unjustified increase in the radius of a circular curve.","PeriodicalId":175652,"journal":{"name":"Modern technologies. System analysis. Modeling","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114736031","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":"Analysis of visual models of big data technology for transportation process monitoring based on freight railcar storage","authors":"A. Vlasov, A. A. Podorin, A. Y. Malevanniy, D. Rubtsov","doi":"10.26731/1813-9108.2020.3(67).100-108","DOIUrl":"https://doi.org/10.26731/1813-9108.2020.3(67).100-108","url":null,"abstract":" vlasovai@bmstu.ru Abstract This article analyzes how to evaluate the efficiency of the transportation process. It is mainly focused on methods and means of monitoring its basic indicators. When considering data structures for storing information on railcars and their journeys, it was revealed that in the framework of modern realities existing monitoring methods are not effective enough, since large-scale data processing is required. After an analysis of the existing structure, it was found that the initial data structure includes a set of dis-parate data, which creates difficulties and inaccuracies in monitoring the transportation process. Therefore, its restructuring is proposed. The new structure provides an opportunity to eliminate inconsistencies in cargo operations, resolve difficulties and reduce errors in monitoring the transportation process. To solve the problem of analyzing railcar and cargo flows through the network of Russian railways, it is proposed to allocate a new data structure that ensures the minimization of the amount of stored information in the target statistics. As transport data increases in quantity and complexity, big data technology is proposed as a solution. The use of the railcar journey repository provides the possibility of monitoring the current transportation process and identifying problematic directions of transportation. The results can be used to plan and forecast freight transportation. The proposed approach to the implementation of the repository greatly simplifies the development of systems for analyzing railcar and train flows. Implemented technologies provide the ability to supplement the architecture with other data and forecast the actual cargo flow on the basis of data from","PeriodicalId":175652,"journal":{"name":"Modern technologies. System analysis. Modeling","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126801843","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 simulation of the probability of the car sharing availability at a walking distance","authors":"А. Берфельд, Е. Корягин, Н. Катаргин, M. Berfeld, M. Koryagin, V. Katargin","doi":"10.26731/1813-9108.2020.3(67).54-59","DOIUrl":"https://doi.org/10.26731/1813-9108.2020.3(67).54-59","url":null,"abstract":"Currently, driving a car is an integral part of life in Russian cities. But parking problems make car ownership less attractive. Therefore, car sharing services are being actively developed in the world and in Russia. The main advantage for the client is the absence of parking problems. Unlike a taxi, the client has the ability to drive a car. First of all, this service is developing in large cities. However, one of the largest cities in Russia, Krasnoyarsk, has gained a negative experience in car sharing. To analyze the problems, a mathematical model of the efficiency of the car search was built. First, statistics were collected that showed a low demand for car sharing. Then the district with the most orders was selected. For this district, formulas for calculating the average distance between the client and the car are obtained. The model is based on the probability of finding a car within walking distance. The obtained formulas made it possible to calculate the probability of finding a car depending on the number of free cars and the maximum distance to it. It turned out that with a small car fleet, it is almost impossible to find a free car in the walking distance. It is concluded that it is necessary to significantly increase the size of the car fleet in order to provide the necessary quality of service to stimulate demand.","PeriodicalId":175652,"journal":{"name":"Modern technologies. System analysis. Modeling","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134107572","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}