bluuebunny/crossref_metadata_2025 huggingface dataset:
Impact of the Seventh Harmonic Magnitude for an Optimal Control of Five-phase PMSM
Authors: Dieng A
Published: October 2020

In this paper, the impact of the seventh harmonic magnitude for an optimal torque control of 5-phase PMSM is studied. We showed that the machine evolved in two orthogonal frames and can be decomposed into two fictitious machines called respectively main machine, secondary machine. As the two frames are fully decoupled, the torque control of each fictitious machine is done separately. the goal is to maximize the average torque, to minimize the copper losses and to reduce the torque ripples. The main machine is not impacted but in the secondary machine, it is possible to know the variation of the torque ripples and the copper losses by modifying the imposed current references and taking into account the seventh harmonic of the EMF. An itemized analysis of the impact of the EMF seventh harmonic magnitude is done. Simulation results highlight the performances of the torque control strategy under using a robust controller.
Economic Verification of Hybrid Energy Utilizations with HOMER Pro
Authors: Gu Zhengwei , Zhou Yangping
Published: October 2020

This study gives emphasis to the economic analysis of hybrid Energy systems which are gradually paid attention by researchers worldwide as a new way to cope with climate change and sustainable development. The economic cost is an important feature that restricts the development of hybrid energy system. The purpose of this study is to verify the economic characteristics of hybrid energy system with HOMER Pro software. Firstly, the economic characteristics of different single energy sources are investigated. Secondly, the economic performances of different hybrid energy systems are analyzed and compared. The research results show that our simulations based on HOMER Pro software have good agreement with those in reference cases. In the future, a unified economy evaluation will be carried out for these hybrid energy utilizations.
Choosing rational locations for placing wind farms in Eurasia with regard to the railway transport specifics
Authors: Dmitrenko A V , Lesnykh E V , Bekher S A , Dmitrenko I Y , Buryanina N S
Published: October 2020

On the continent of Eurasia, there is a main point of excess energy resources - a cargo point located on the territory of Western Siberia in Kuzbass. From it, both west and east, excess flows of energy resources are transmitted in the form of electricity or transported in the form of coal over long distances by rail. Electricity is an environmentally cleaner form of energy resources, since it does not pollute the environment. Therefore, in modern conditions, it is necessary to use electricity to a greater extent. There is the possibility of replacing energy-intensive technological operations: from wood and coal, as well as oil and gas to electric energy. This will be possible and advisable to be carried out in new points during the additional construction of production enterprises for the generation of electricity, as well as when replacing existing technical equipment from previously existing fuel sources with electric energy. The generation of electricity from renewable sources becomes appropriate. The placement of wind farms in both the western and eastern parts of the Eurasia continent will make it possible to reduce the transmission distance of electric power from a cargo point by 5 thousand km.
Calculating model allowing to keep the authenticity of transport infrastructure objects
Authors: Loktev Daniil , Korolev Vadim , Tkachenko Vladimir , Klekovkina Nadezhda
Published: October 2020

In this work, a calculation model of the building is proposed, which is an object of historical and cultural heritage, which allows, on the one hand, reconstructing the building taking into account the changed operating conditions and regulatory loads according to all the rules of the construction mechanics of the structure, and on the other hand, maintaining the authenticity of the main architectural and decorative elements. The proposed engineering solutions allow for the collaboration of new and historical structural elements, combining the possibility of using modern materials in new structural elements and authentic materials in elements whose historical authenticity is preserved. In the calculation model, it is proposed to use two layers of finite elements, which are responsible for new and historical structural elements, and then ensure the compatibility of their work using special conditions.
Organizational and technological decisions in the construction of transport infrastructure facilities
Authors: Sokolnikov V , Osipenkova I , Stupakova O , Nurgalina R
Published: October 2020

In recent years, the technology of design and construction of buildings has changed significantly both in terms of applied structural solutions, and in terms of the use of construction machines, mechanisms, equipment. The recent significant qualitative leap in the development of methods and ways of organizing the implementation of individual technological processes and their complexes requires an improvement in the methodological approach to the adoption of organizational and technological decisions as part of the documentation developed during the design and construction of facilities.
Optimization of the construction project in complex geomechanical conditions
Authors: Komolov Vasilii , Simankina Tatyana , Kuzmin Konstantin , Kuzmina Tatyana
Published: October 2020

The purpose of the study is to optimize the construction project of a residential complex. The paper considers the mechanism for optimizing the construction of a residential building and a quarterly road network. The study was carried out in several stages and includes the breakdown of the complex into specialized types of work, the preparation of matrices of work volumes, the calculation of construction duration, the calculation of methods for organizing work in different order, and the calculation of the estimated cost of objects. The calculation and selection of the work organization method was carried out by the method of continuous use of resources, continuous development of work fronts and the critical path method. Next, statistical modeling of the deviation of the project duration from the planned value was performed in the Microsoft Project software package. The first step was to perform a regression analysis. The second step is a correlation analysis, which allowed us to determine the degree of reliability of the project. The third step is to analyze the effectiveness of the project. In conclusion, a conclusion is made regarding the relevance of the unified estimated standards for this project.
Conceptual framework for solving problems of commercial transportation of goods in the city logistics system
Authors: Rudskaia Elena , Eremenko Igor
Published: October 2020

The aim of the study is to develop conceptual provisions and operational recommendations for the development of urban transport logistics on a public-private partnership basis. Theoretical studies were carried out using methods of analysis and synthesis of existing scientific developments in the field of territorial management of logistics centers, distribution sites and terminals at the municipal level. At the end of the study the following results were obtained: - the necessity to change the format of transport and logistics services for urban economic relations is proven; - the efficiency to establish a city network of interceptive logistics sites for trucking on the principles of public-private partnership is justified, parameters for choosing locations for such logistics facilities are developed and their attributes are formulated; - recommendations on advanced transport management on the basis of the municipal digital centre with the aim of increasing the efficiency of the urban transport system with environmental protection were proposed.
Mathematical model of transport network planning on the territory of the forest fund
Authors: Kovalev R N , Enaleeva-Bandura I M , Vasilijev V I
Published: October 2020

The main purpose of the paper is to develop a mathematical model for planning the transport network in the territory of the forest fund based on the criteria of ecological and economic efficiency. Setting the goal is caused by the fact that, despite the urgency of the problem of ensuring effective ecological, social and economic development of forest fund and the existing scientific achievements in this field, both in Russia and abroad, the scientific base has accumulated a small amount of research that considers forest transport systems as one of the main factors that contributes to achieving the goal of sustainable development of forest territories in modern conditions of management. The complex analysis of the ecological and economic efficiency of transport network planning in the forest fund territory is only indirectly present in the scientific literature and is local in nature. The paper presents an approach according to which a qualitative criterion is formed for evaluating the effectiveness of the transport network functioning on the territory of the forest fund as achieving the maximum of all potential revenues from the use of various types of forest resources and the ecological potential of the territory on the basis of the planned network.
Pakistan’s Urban Transport and Commute Problems (an Empirical Investigation)
Authors: Tran Aí Huu , Subhani Muhammad Imtiaz , Ushakov Denis
Published: October 2020

Like all evolving economies, Pakistan’s urban transport and commute problem is one of the tenacious subjects of the time which needs to be judged and evaluated. With mounting congestions on roadscausing from an upturn in number of privately owned vehicles, urban commuting problem is aggravated so abruptly in all the major cities of Pakistan. The resolution of this research was to study the transport infrastructure in Pakistan and the conditions of traffic and commute in the country while focusing its major cities. Respondents’ perceptions/responses on the proposition of this study were recorded for reaching the empirical findings on urban transports and commute problems and their effects. 1000 respondents were selected from all major cities those wereaffected during the rush hours. The findings confirmed that the traffic and commute conditions are very critical problems in all major cities of Pakistan. The present conditions of traffic and commute pave the way for effecting employee productivities, while traffic congestion promotes psychological problems in public in general. The findings recorded that, in country the circular railway network development reduces the dependency of general people on buses and other means of commute further, this circular railway system eliminates traffic congestion in all major cities of Pakistan. Findings proposed that the better commuting infrastructure (low types roads, high types roads, under passes, bridges, and fly overs) can save the time of public while eliminating the traffic jams in all the major cities. This research recommends that the eliminations of encroachments may also pave the way for reducing traffic and commuting congestions. It was proposed empirically by this study that a good welcome for traffic rules by public may help to manage commuting on the roads as the whole.
Traffic simulation: an analytical review
Authors: Dorokhin Sergey , Artemov Alexander , Likhachev Dmitry , Novikov Alexey , Starkov Evgeniy
Published: October 2020

The constant increase in the number of cars in cities causes transportation problems that make it necessary to optimize the road network so as to satisfy the transport needs of the city. In this regard, modeling and optimal planning of the road network are of great importance. Motion modeling is a widely used method of traffic studies, modeling, planning and development of transport networks and systems. It represents the construction of a working model that reflects the similarity of properties or relations with the real problem under consideration. Modeling allows makes possible to study the complex tasks of traffic not in real conditions, but in the laboratory. In a more general sense, modeling can be defined as a dynamic display of some part of the real world by building a computer model and moving it in time. Simulation models of traffic aimed at modeling real transport operations can be divided into three categories: microscopic, macroscopic and mesoscopic modeling. These methods of modeling traffic flows are designed to solve the most common transport problems. In most cases, models allow determining such parameters as traffic intensity, average speed, delays and time loss. This study is an analysis of existing traffic flow simulations in terms of their functions, limitations, and application by various criteria.
Two subclasses of generalized Kenmotsu manifolds
Authors: Abu-Saleem A , Kochetkov I D , Rustanov A R
Published: October 2020

The paper studies the geometry of the Riemann curvature tensor of generalized Kenmotsu manifolds. In this paper, several identities satisfied by the curvature tensor of generalized Kenmotsu manifolds are obtained. Two identities are distinguished from the obtained identities, called the first and second additional identities of curvature of the GK-manifold. Based on additional identities, two subclasses of GK-manifolds are distinguished, and a local characterization of the distinguished classes is also obtained. It is proved that the distinguished two subclasses of GK-manifolds coincide and have dimension 5. In addition, it is proved that the class of distinguished manifolds coincides with the class of almost contact metric manifolds obtained from a cosymplectic manifold by a canonical concircular transformation of a cosymplectic structure of dimension 5.
Improving the emergency system for a traffic accident
Authors: Rembalovich Georgy , Terentyev Vyacheslav , Andreev Konstantin , Anikin Nikolay , Teterin Vladimir
Published: October 2020

The problem of high traffic loads of vehicles is typical for most countries of the world. The current situation leads to significant delays in vehicles due to traffic jams, which negatively affects the efficiency of cargo and passenger transportation. In addition, the environmental burden is increasing due to increased emissions of harmful substances into the atmosphere. An increase in the number of road traffic accidents and an increase in the severity of the consequences of accidents is another sad factor caused by the increase of cars. In order to reduce the negative aspects associated with reducing road safety in most countries of the world, emergency assistance systems have been developed and are constantly being improved in a case of a car accident. Such systems include the European ECall, NEXCO Central, developed in Japan, ERA-GLONASS, deployed in the Russian Federation and a number of other modern developments. These systems allow real-time monitoring of the traffic situation using GPS navigation and in the event of an accident, timely inform the relevant services. The introduction of an automatic system for reporting a traffic accident can reduce the response time of emergency services and reduce the severity of the consequences of accidents. The article considers the possibility of expanding the functionality of the ERA-GLONASS system by installing additional sensors for shock, moisture, flame and the vehicle’s spatial position after the accident, which will provide emergency services with extended information about the condition of damaged cars after a road accident. Equipping vehicles with such sensors will allow the contact center operator to assess the severity of the consequences of the accident correctly and coordinate the activities of rescuers even before arriving at the scene. Improving the ERA-GLONASS system will have a positive impact on the efficiency of the first aid for victims of a traffic accident and will qualitatively increase its level.
Assessment of the decisions made by the marine vessel navigator
Authors: Fadyushin S G , Vereshchagina E A , Pafnuteva Y V
Published: October 2020

The paper deals with interdisciplinary scientific research that lies in cognitive psychology, information technology and navigation, and is devoted to the relevant topic of navigation - vessel navigator’s decision-making. It reflects the results of theoretical research on the formalization of certain aspects of human mental activity in relation to solving navigation problems. The specific nature of this paper lies in navigator’s inclusion into the ship management which leads to the need in simultaneous consideration of psychological characteristics and ship manageability characteristics. Thus, navigator’s decisions are subjective and consequently difficult to formalize. The purpose of the research is to formalize, i.e. to mathematically describe the quantitative assessment of navigator’s decision-making. Author’s method of probabilistic sense evaluation is used in this research. The semantic space structure, which channels navigator’s decision-making, is represented as the model of a semantic prism. The results are adapted to the concepts of navigation and may be of interest to specialists in ship traffic control automation, artificial intelligence, creation of intelligent control systems and navigation safety.
Modification of the security system for using vertical transport during the operation of a high-rise building
Authors: Dement’eva M E , Dement’eva A V
Published: October 2020

The article explores the principles of organizing an integrated system of vertical transport to ensure the safe operation of high-rise buildings and the possibility of improving it. The reasons for the violation of the safety of using a tall building and the factors for their prevention and elimination were analyzed. The relevance of the study is justified by the non-zero probability of emergency situations and possible human casualties. On the example of a warning and evacuation control system in the event of a fire, methods of intelligent control of human flows are considered. The aim of the study was the proposal to introduce additional tools to make the vertical transport system safer and faster in the event of any emergency. The objective of the study was to calculate the rationale for these proposals. The calculation results confirm the effectiveness of the proposals, which will lead to a reduction in the time of evacuation, reduction of consequences in the form of stress and injuries for people.
Modified swarm algorithm «ant tree» in the problem of diversification of tractor resources spaces
Authors: Lebedev Boris K , Lebedev Oleg B , Purchina Olga A
Published: October 2020

In this work, the problem of increasing traceability is solved by diversifying trace resources, which consists in using additional areas adjacent to the channels below and above, with a trace layer located above the “over-the-cell” cells. For a single-layer routing uses a new paradigm of combinatorial optimization – ant tree (trees ant colony optimization (T-ACO)), based on the ideas of adaptive behavior of ant colony. The decision tree is used as a decision search graph. An agent for the decision search graph does not create a route, but a tree, which in its structure coincides with the representation of the solution to the trace problem in the «over-the-cell» region. This eliminates the use of additional transformations in the decoding process of decisions that allow interpretation of decisions in the form of trees and allows you to discard a lot of «illegal» solutions, which leads to an increase in the quality of the solutions obtained. Using the tracing procedure in «over-the-cell» based on the ant algorithm allows you to unload the channel by 15-20%. The time complexity of the algorithm depends on the number of vertices n of the decision search graph, the number of agents y, the number of iterations l, and is defined as O (n2·l·y).
Terminological modelling of the aviation terms system in the context of globalized information space and security of aviation industry
Authors: Burlakova Iryna , Sibruk Anastasiia , Khalinovska Liudmyla , Sibruk Viktor
Published: October 2020

Ukrainian aviation terminology, which denotes the concept of this field of technology, belongs to the general technical terminology of the Ukrainian language. Solving a number of problems of translation and adaptation of borrowed terms, primarily from English, will lead to the active integration of national terminology to the scientific world. One of the important issues in the development of Ukrainian aviation terminology at the regional and global levels is the quality and adequate translation of domestic terms into the global aviation language called airspeak which is part of the global language - lingua franca (ELF). One of the main tasks of linguistic science is the systematization and generalization of phenomena and the formalization of the laws of their origin and functioning. Terminology has its own specificity, which consists in the fact that a large number of special words is borrowed from other languages by the professional broadcasting, which is connected with scientific and technological progress, cooperation of scientists from different countries of the world. The vocabulary of terminological systems is the most actively replenished and changed. One of the main features of terminological vocabulary replenishment is the use of foreign words and their components for naming new concepts. Classical terms meet the requirements of accuracy, brevity and ensure the uniqueness of the term.
Transport security in terms of digitization
Authors: Sheveleva S , Yakovleva E
Published: October 2020

The authors consider in the article the issue of ensuring transport security in Russia both from the standpoint of the lack of an appropriate approach to formation of educational programs for the training of legal personnel that can meet the “challenges” of scientific and technological progress, and the need for increased attention to the trends of modern scientific research, which serve as a basis for formation of a legislative framework aimed at regulating public relations in the field of fighting crime in this industry. The issue of formation of human resources corresponding to a high level of professionalism, rationality, competence and mobility is indicated by the rapid “complication” of crime in the field of transport infrastructure caused by the development of IT technologies and introduction of robotic controls based on the work of artificial intelligence. One of the solutions to the problem identified by the authors should be creation and implementation of a new training course, the conceptual basis of which should be built on the principle of a modular system, but combine the existing traditional approaches of legal education in order to prepare competitive personnel that can meet the “intellectual challenges” of modern reality, which is a direct reflection of connection between science and knowledge (Scientia est potentia). The publication was prepared as part of the implementation of the state task for 2020. “Transformation of private and public law in the conditions of an evolving individual, society and state” (No. 0851-2020-0033).
Intellectual monitoring and planning system of energy efficiency indices of the traction power supply system
Authors: Cheremisin V , Vilgelm A
Published: October 2020

The actuality of questions of energy saving in the traction power supply doesn’t give rise to doubts. At the same time in such complex composition as the traction power supply system, taking into account its cooperation with the electric rolling stock, questions solving of the energy efficiency increase must be accompanied by a complex efficiency assessment of the proposed activities. The technical and organizational arrangements implementing with this purpose in mind must not just secure the decline of the power intensity level of the vehicular process, but allow securing this vehicular process in the requisite volumes with excellent prospects at the moment and also be economically expedient. At present no such technologies and especially software tools exist which allow estimating and predicting the alteration of the energy efficiency indices of trains’ traction regarding the current values by change of the engineering parameters of the traction power supply system and the operating data of the railways’ areas. In this article a creation necessity of an intelligent monitoring system and an indices programming of the traction power supply system is justified, allowing determining the influence grade on the basic energy efficiency indices of the operational factors and the characteristics of the traction power supply system and to determine the optimal combination of these factors and characteristic for the justified changes planning of the traction power supply system characteristics and the improvement of the operational indices of trains’ traction in the view of the achievement of the maximal energy efficiency. The architecture of such a system is described. The tasks which solution allows practically realizing and implementing in maintenance the proposed elaborating are formed.
Molybdenum waste usage as thinning agent in concrete production
Authors: Tuskaeva Z , Karyaev S , Tagirov T
Published: October 2020

A comparative analysis of concrete without additives and concrete samples containing molybdenum wastes was carried out. The purpose of the work is to identify the effectiveness of the metallurgical waste influence on the physicomechanical properties of concrete, the transportation from the storage site to the concrete plant, and the substantiation of their application areas. This will solve a twofold problem: to solve the problem of industrial waste (by improving the environmental status on the example of North Ossetia-Alania) and expand the range of additives used in the production of concrete. By conducting laboratory tests the physical and mechanical properties of concrete mixtures are determined. To determine the strength characteristics of concrete samples, the IM-1250M testing machine was used. The tests were carried out under the same temperature and humidity conditions. According to the results of the experiments, the samples with molybdenum-scheelite waste showed a higher result of the physicomechanical properties of concrete. As a result of experimental analysis, the influence of metallurgical industry wastes on the strength characteristics of concrete and water resistance, as well as the safety of their use in concrete mixtures, was determined. The use of waste from the metallurgical industry will save natural material, and at the same time clear large areas of these dumps. The use of waste from the metallurgical industry will save natural material and reduce transportation costs, as there are concrete plants near the dumps, which are economically feasible. Thanks to that use it is possible to clear the large territories of these dumps.
On the exterior Dirichlet-Neumann problem for the Biharmonic equation and its application in mechanics
Authors: Matevossian Hovik A
Published: October 2020

We study the unique solvability of the mixed Dirichlet-Neumann biharmonic problem in the exterior of a compact set under the assumption that generalized solutions of this problem has a bounded Dirichlet (energy) integral with weight |x|a. Using the variational principle and depending on the value of the parameter a, we obtained uniqueness (non-uniqueness) theorems of the Dirichlet-Neumann problem or present exact formulas for the dimension of the space of solutions. The results of this paper are used in the study of mathematical problems in mechanical models, in particular, in transport models and procedures.
Research of the viscosity of unfilled polymers using quality functionals
Authors: Bormotov A , Gorokhova A
Published: October 2020

Kinetic processes of unfilled polymers structure formation are explored and mathematical method of polymer composites modelling using kinetic (transient) processes quality functionals is proposed. Advisability of kinetic (transient) processes consideration as necessary and sufficient sign of thermosetting binder structure formation is justified. The processes occurring during the formation of the modified polymer and appearance of qualitatively new properties while maintaining chemical individuality of each component are considered. Approbation of mathematical method is carried out in the construction of mathematical model and study of unfilled epoxy resin ED-16 viscosity.
Assessment of enclosing structure unsteady-state moisture behavior using moisture potential theory
Authors: Gagarin V G , Akhmetov V K , Zubarev K P
Published: October 2020

The logistics of the moisture movement in the building wall is very important. We need to know the movement of moisture from one point to another. Two known moisture transport equations are analyzed. The first one is based on vapor-state moisture movement in sorption wetting zone, and the second one – on combined transfer of vapor and liquid moisture. Their strengths and shortcomings are described. Analytical formula for moisture potential F developed by V.G. Gagarin and V.V. Kozlov is given. This formula allows taking into account moisture transport simultaneously in sorption and ultrasorption wetting zones in a consistent way. Derivation of a new moisture transfer equation based on moisture potential F is given. Benefits of such approach are introduced. Boundary conditions for moisture transport problem are formulated, problem solution by finite difference method using an explicit difference scheme is given. The proposed method is applied to single-layer enclosing structure made of aerated concrete blocks. It is demonstrated that illustrated method takes into account wetting inertia, and allows moisture distribution determination in all enclosing structure sections at any time. Results can be presented as moisture distribution along enclosing structure thickness, or as enclosing structure average moisture variation during a year. It is highlighted that calculation using the proposed method does not require values of separate moisture transfer potentials.
Stabilized soil - new material for road construction
Authors: Krayushkina Kateryna , Oliynyk Olena
Published: October 2020

Ukraine’s social and economic development and its integration into the global community largely depend on the development of transport infrastructure, in particular, on the level of availability of roads. Exactly by development of highways the way out of the world economic crisis started for many countries. Thus, the USA, Germany, Japan, which once identified the development of the road network among the main priorities of economic policy, as a result received not only a developed segment of transport infrastructure, but also stimulated economic growth and achieved positive results in solving the employment problems. Among the urgent tasks of technical progress in road construction, the creation of technologies that will improve the condition of soil and allow reuse. It is known [4], that the soil is used for the arrangement of subgrade and road foundaion, as well as of basic pavement layers, the strength and stability of which affect the riding quality parameters of the road - strength and evenness. The duration of construction and repair of roads depends on the volume of earth works.
Experimental studies of traction drive generators
Authors: Platonov V V , Tulegenov E M
Published: October 2020

The article describes the experimental studies of traction drive generators. The surveyed traction drive generators are made in accordance with the requirements of current regulatory documents (state standards and industry specifications). The actual life of the traction drive generators and all its main examined units, elements are significantly higher than the average service life. All the equipment under examination, to one degree or another, has signs of a decrease in resource, which is confirmed by deviations of the technical condition identified during the scheduled repairs and during the inspection. In most cases, deviations of the technical condition can be eliminated without consequences (localized) in scheduled repairs. During the examination, special attention was paid to deviations of the technical condition, which affect the service life, reliability, and also the duration of the overhaul period. Assessment of the technical condition of the components of a traction drive generators. Based on the results of the survey, the following conclusions can be drawn on the state of the main basic components of the tour generator, which determine the reliability of its operation.
Ensuring environmental safety at Garabogaz transport and industrial complex by identifying environmental risks
Authors: Smirnova Elena , Ataev Azat
Published: October 2020

The authors of the article propose a number of measures to optimize the production process of “Garabogazcarbamide” factory in order to increase its environmental safety. The factory and the newly equipped berth in Garabogaz (Bekdash) have a negative impact on the ecological situation of the Caspian Sea, in particular, Garabogazgol Bay. The fragile balance between economic activity and preservation of the ecosystem and its biodiversity is broken. Potential accidents at drilling rigs and oil-gas transport and industrial complex can lead to extreme consequences and desertification of the region. The threat of environmental degradation in the Caspian region and the depletion of its natural resources are especially great due to the overdevelopment of the fuel and energy industry, the lack of legal regulations for environmental protection, the limited use of energy and environmental technologies and a primitive environmental culture; all these factors increase the risk of technological disasters. According to the authors’ opinion, the organization of a system of continuous environmental monitoring over the technological updating of the factory equipment; the use of a closed JW system (including desalting unit); the construction of its own power plant for the needs of the factory; purification systems for atmospheric emissions; improving smart technologies to reduce natural gas consumption can help to improve the environmental situation in Garabogaz.
The operation of trams on a tramway track in Kosice, and their technical issues
Authors: Majercak Jozef , Majercak Peter , Kurbatova Anna , Kurbatova Ekaterina
Published: October 2020

Public passenger transport in the city of Košice is using the Vario LF2 + trams. However, there have been dangerous accidents of brake disc rupture during operation of the tram in operation and in the following article we analyzed the causes and suggested a solution to eliminate this dangerous phenomenon in the transport process.
Rall gauge trajectory, macro and micro profile of tracks
Authors: Akkerman G , Akkerman S
Published: October 2020

The article discusses some of the possibilities of formalizing (creating a digital clone) of one of the most important subsystems of the railway – rail gauge. It is proposed to evaluate it from the point of view of the safety of the wheel – rail interaction.
Improving the mathematical model of wear of contact elements of pantograph during very high-speed movement
Authors: Philippov V M , Smerdin A N
Published: October 2020

The long-term development program of the Russian Railways holding provides for a comprehensive modernization of the railway infrastructure by The least expensive of these measures is the use of contact elements with an extended service life, providing reliable, economical and environmentally friendly transmission of electricity to rolling stock. In accordance with the program developed and successfully tested at OSTU, the methodology for conducting experimental studies of contact pairs of current collector devices for conducting a test cycle requires specialized experimental complexes, as well as significant time and resources. To reduce the volume of experimental studies, a combined method is used - a combination of the required minimum of experimental studies of real objects (or their analogues) and calculation methods based on mathematical modeling of processes occurring in contact pairs of current collector devices. However, the use of existing mathematical models for predicting wear under conditions of very high-speed movement is not accurate enough due to the lack of consideration of the aerodynamic effects and the speed of the rolling stock on current collection processes. This article discusses the improvement of the electrical component of the wear model of the elements of contact pairs of current collector devices under conditions of very high-speed movement. The histograms of the electrical wear of contact elements obtained by calculation using the existing and improved mathematical models are presented.
Enhancement of heat transfer of heat exchangers using in transport by pulsating flow
Authors: Haibullina A I , Ilyin V K , Yarullina A A , Hayrullin A R
Published: October 2020

The oil coolers are used in the hydraulic system of transport vehicles. In the shell and tube water oil coolers, oil is can be located on the tube side, water in the shell side. Different enhancement of heat transfer methods is used in oil coolers. The paper presents the results of a numerical study of the effect of asymmetric flow pulsations on the enhancement of heat transfer in a pipe for a highly viscous fluid with a Prandtl number Pr 293. The pipe length was 12 pipe diameters. The Reynolds number Re calculated from the inner diameter of the pipe was 100. The Strouhal number Sh was inside the range from 0.14 to 1.13. The amplitude of the pulsations of the flow had a reciprocating motion. The dimensionless relative amplitude of the pulsations was 1, 3, and 5. An increase in heat transfer was observed over the entire range of pulsation frequencies and amplitudes. The intensity of the pulsating flow significantly increases the heat transfer in the pipe. A comparison of the effectiveness of harmonical and asymmetric pulsations for enhancement of heat transfer was carried out. It is noted that the efficiency of asymmetric pulsations increases with increasing amplitude and frequency of pulsations. The maximum enhancement of heat transfer with asymmetric and harmonic pulsations was 2.03 and 1.93, respectively.
Numerical analysis of heat transfer in tubular type heat exchangers of transport vehicles with pulsating flow
Authors: Haibullina A I , Savelyeva A D , Hayrullin A R
Published: October 2020

The shell and tube heat exchangers are widely used in many engineering applications. Tubular heat exchangers can be found in the transport, power engineering, food industry and etc. Therefore, the study of the characteristics of heat transfer and hydrodynamics in tubular heat exchangers is important. In this paper, numerical analysis of a heat transfer in a staggered tube bundle with steady and asymmetrical pulsating flow studied. The transverse and streamwise spacing-to-diameter ratios of the tube bundle were 1.3. The Reynolds number Re was 1100. Numerical simulation of the flow past the tube bundle with 7 longitudinal rows was carried out by solving the incompressible Navier-Stokes equations and energy conservation equation with two different modeling strategies. The simulation was carried out with the RNG k-ε turbulence model with enhanced wall treatment and laminar solver. The sensitivity of the Nusselt number to the mesh parameters is noted. The effect of the number of rows of the tube on the heat transfer rate for the tube bundle with the pulsating flow also was discussed. For the pulsating flow enhancement of the heat transfer in the tube bundle dependence from the row of the tube and modeling strategy. When RNG k-ε turbulence model was employed the heat transfer rate of the first row is increasing by 16 %, downstream rows by 6-7 %. When laminar solver was employed the heat transfer rate of the central rows are increasing by 53 %.
Service maintenance and repair of passenger cars in the concept of Digital Enterprise
Authors: Bannikov D A , Sirina N F
Published: October 2020

The passenger rolling stock has a number of specific technical characteristics based on original design and technological solutions. The consequences of the passenger rolling stock failure cause unplanned downtime, resulting in: reduced productivity, traffic safety and quality of service, as well as financial losses. Determination of cost-effective maintenance and repair becomes one of the key tasks in the operation of passenger rolling stock. At present the tools for planning maintenance and repair of passenger rolling stock are static. They do not take into account dynamic information during the life cycle of the rolling stock. The planning tools are mainly a copy of the maintenance and repair organization manual. This article deals with the digital model of maintenance and repair of passenger rolling stock as a transformation of strategy from diagnostic to predictive. The modeling serves as a fundamental starting point in managing the life cycle of passenger rolling stock. The theory of passenger rolling stock life cycle is complemented by the theory of management, creating a model of service maintenance and repair. The digital model covers the life cycle of the passenger rolling stock from initial planning to a multitude of solutions, such as: separation in the mechanism of financing, service operator selection, definition of key performance indicators for the operator, setting fees, maximum profit, providing access to all operators of railway services. At the conceptual level, the fundamental aspects of the digital service model have been developed to forecast future events and make optimal plans, taking into account the multivariate and structural heterogeneity of data in the virtual networks. The modeling approach oriented to the global description of the business process and distributed management of service maintenance and repair is considered.
Research component in training of transport specialists
Authors: Golubchikova M G , Harchenko S A , Byshlyago A A , Korobchenko A I , Golubchikov G V , Panichkina M V
Published: October 2020

A specialist in the field of transport systems must have high educational and professional independence, in the process of his future professional activity, constantly develop his competencies and master new ones. In particular, he needs to possess developed research skills, to be ready to solve new problems constantly arising in transport. The article proposes the author’s approach to the formation of educational and professional independence of future transport specialists, aimed at the development of research skills. Based on the competence-activity approach, the authors propose a system of work on the formation of a research component in the competences of a future transport specialist as part of the formation of his educational and professional independence. The materials of the article contain a description of the pedagogical experiment and the results of the pedagogical experiment on introducing the proposed ideas into the educational process of the railway university. The study was carried out on the basis of the Federal State Budgetary Educational Institution of Higher Education “Irkutsk State University of Railways”.
Digital transformation of single information space of a modern university
Authors: Pakhomova M , Ermakov S , Ryabova T , Belchenko J , Burova A
Published: October 2020

The article describes the process of development of the single information space of a university on the example of North-Western Institute of management RANEPA under the President of the Russian Federation. The aim of the research is to examine the logistical approach to the development of innovative information space. The composition of the single information space (SIS) is given, the role of its constituent elements is revealed. Special attention is paid to the use of Wi-Fi technologies. The methodology is based on the logistic approach to considering the innovative information educational space as a unified object with special features being determined by the elements included in the system. The principle of the unity of information space consists in possibility of logging into any SIS system by a single account. So, changing of information in one system should lead to change in another, and the exchange of information is realized between the automated systems due to the creation of integration mechanisms based on the universal information gateway, enabling the integrated control system be relevant. The principal conclusion is that single information space creation solves the task of transition from patchwork automation of various fields of activity of the organization to a single integrated approach in building an automated control system based on a single industrial software platform.
Safety strategy as an actual resource for forming modern marine corporate culture in marine education standards
Authors: Ozarkiv O M , Yakovenko M L
Published: October 2020

The article discusses the impact of training methods for seafarers on the formation of professional teamwork skills necessary to ensure sealift safety and analyzes the prospects for further use of this type of training in the context of Russian professional maritime education.. The article focuses on corporate culture of cadets of marine specialties as a factor in the continuity of the corporate culture of the university and the marine subculture and determine its external and internal order. On the basis of Kerch State Maritime Technological University, as part of the study of marine corporate culture, a study was conducted of the state of no technical skills of cadet in “bridge team” (BTM) training courses, navigational training practice. The process of practical training, according to the results of the study, is the most effective tool for building teamwork skills.
Identification and analysis of risks of digitalization in the field of transport services
Authors: Pirogova Oksana , Scherbak Maiya , Maltseva Irina
Published: October 2020

The article analyzes the current state of the transport service sector of the Russian Federation and shows that it occupies a dominant place in the structure of GDP, and more than half of the able-bodied population of the Russian Federation are employed in the transport service sector. Based on the analysis of the internal and external environment of the transport service enterprise, the influence of the digital transformation of business processes on the enterprise as a whole is investigated. Methods for identifying and analyzing risks are proposed, these methods are considered on the example of a transport service company. The identification process was carried out using the method of SWOT analysis, which showed that the strength of the enterprise is automation and high technology, and the main risk is the risk of revenue shortfall, which is associated with factors such as failures in the work of information technology, low efficiency of online marketing, failures in reservation system, imperfection of personnel selection and assessment information programs. The study showed that a transport service company is exposed to risks with a high probability and a significant amount of damage; such risks require preventive measures to eliminate them. The proposed methods for identifying and analyzing the risks of digital transformation will be useful to senior management of transport service enterprises.
Environmental and transport risk management: methodology, features, classification, impact tools
Authors: Badalova Anna , Larionov Valeryi , Moskvitin Kirill , Barbashova Maria , Vertakova Yulia
Published: October 2020

The article discusses the features of environmental and transport risks as a specific management object. The aspects of modifying the components of the formed methodology of modern risk management in relation to environmental and transport risks are disclosed. The author’s view on the classification of environmental and transport risks is presented. A toolkit of managerial influence and criteria for its selection are proposed.