bluuebunny/crossref_metadata_2025 huggingface dataset:
Strain and electric field tunable electronic transport in armchair phosphorene nanodevice with normal-metal electrodes
Authors: Chen Guo-Hong , Chen Yi-Nuo , Zhou Yan-Wei , Sun Yun-Lei , Ye En-Jia
Published: October 2020

Phosphorene, one of the graphene counterparts, is believed to have promising potential to be utilized in nanoelectronics due to its significant properties. Phosphorene has a nonplanar puckered structure with high anisotropy, which enables the elastic strain or external field to tune its electronic structure. In this work, we propose a nanodevice model based on an armchair phosphorene nanoribbon (APNR) with normal-metal electrodes and study the tuning effect of elastic strain and electric field on the electronic transport properties. We first confirm that the APNR can be driven to be of metallic conduction with linear dispersion around the Fermi level, by applying a critical compressive strain. After applying a perpendicular electric field, the APNR turns out to be a band insulator. Furthermore, we calculate the dc conductance and density of states (DOS) of the nanodevice, where the APNR is connected to normal-metal electrodes. The numerical results show that in the absence of an electric field, the nanodevice possesses peak values of conductance and DOS at the Fermi level. Once the electric field is applied, a gap emerges around the Fermi level in the conductance, which suggests that the nanodevice is turned off by the external electric field. Our investigation on the present system could be useful in the development of a field-effect nanodevice based on monolayer phosphorene.
A TO-based intelligent thermal concentrator considering thermal protection
Authors: Li Yiyi , Zhang Haochun , Zhang Zhen , Wang Zhiwei , Xia Xinlin
Published: October 2020

TO (transformation optics)-based transformation thermotics offers an advanced way to design the propagation path of heat flux at will, which is valuable for the regulation and utilization of thermal energy. Thermal concentrator as one of the typical representatives has great application potential in fuel cells, solar thermal collectors, heat storages, and other energy related devices due to its advantageous functionality and efficiency. However, most existing TO-based thermal concentrators only perform the same thermal rectification effect in different environments, which is limited in industrial applications and insufficient to meet diverse requirements. In this work, based on the improved temperature-dependent transformation thermotics theory and taking thermal protection issue into account, we designed an intelligent thermal concentrator, which can spontaneously exhibit different working states corresponding to different environmental conditions; investigation and optimization of structural sensitivity were also carried out toward two impact factors. In addition, the proposed model was theoretically realized referring to wedge-like shaped materials, and two thermal control apparatus were enumerated as extensions of current work. The proposed intelligent thermal concentrator possessing nonlinear characteristic as well as active functionality can provide reference for energy collection equipment in industrial application, and the revealed methodology can be expanded to design other types of TO-based devices in thermal even multi-physical field.
Selves, interactive representations and context
Authors: Thibault Paul J.
Published: October 2020

In this paper, I re-examine the notion of ‘clause-as-representation’ in Michael Halliday’s systemic functional theory of language. I argue that ‘representation’ is a mode of linguistic action that cannot be understood in terms of the experiential metafunction alone. Instead, a theoretical account of representation must be undertaken in relation to all the metafunctions. Rejecting encodingist accounts of representation, I develop the argument that representations are interactively constituted and emergent in languaging activity. The paper develops these arguments in relation to a process ontological account of the relations between language and the world-side phenomena that language represents. Language does not encode actualities. The future-oriented, anticipatory character of languaging is fundamentally modal in character. A co-articulated self-utterance-situation matrix never attains full actuality. The virtual potentialities of languaging always have the potential for further individuation.
Computationally efficient model of OCT scan formation by focused beams and its usage to demonstrate a novel principle of OCT-angiography
Authors: Matveyev Alexander L , Matveev Lev A , Moiseev Alexander A , Sovetsky Alexander A , Gelikonov Grigory V , Zaitsev Vladimir Y
Published: October 2020

In this paper, we present a computationally highly efficient full-wave model of optical coherence tomography (OCT)-scan formation by focused beams in spectral-domain OCT. Similarly to some previous models, it is based on the summation of fields scattered by discrete sub-resolution scatterers, and enables one to account for the axial and lateral inhomogeneity of the illuminating Gaussian beam. The main feature ensuring the high computational efficiency of the described model is that, rather than numerical integration of the scattered signal over the receiving aperture, we apply an analytical description of both the illuminating-beam focusing and the collection of the scattered signals over the receiving aperture. Elimination of numerical integration over the receiving aperture increases the overall computation speed by a factor of

∼

10
3

. This is of key importance in terms of the practical feasibility of simulations of 3D OCT data volumes for large amounts (∼

10
5

−

10
7

) of scatterers, corresponding to realistic densities of cells in biological tissues. We demonstrate the model’s possibilities by simulating the digital refocusing of strongly focused OCT beams in the presence moving scatterers, thereby presenting a novel principle of contrast-agent-free visualization of scatterer flows, with velocities typical of blood microcirculation.
The design of steel constructions in seismic conditions
Authors: Olfati Rahmanuddin , Shologin Sergei
Published: October 2020

In this article, the principles of designing of seismic resistant steel frames of industrial buildings are considered. The particular attention is paid to the damage causes of the steel frames under the seismic loads affects, and to the requirements that must be considered while designing the steel frames in seismically active areas. The most suitable materials that can be used to strengthen the steel frames have been studied. The strengthening is possible due to the frame’s proper operating in accordance with arising seismic loads. The analysis of the loads, which are calculated according to the regulatory documents of Russia and other countries, is presented. As well, the loads have been compared to each other. There is a review of possible experimental methods to determine the frame’s strength under the seismic loads in the article. In addition, there are some critics on the existing regulatory documents and on, exactly, the formulas and coefficients used, as well as on the proposed alternative solutions. We have made the research of the effect that soil has on the steel frame’s strength characteristics under the seismic loads. Promising constructive solutions for steel frames in case of earthquakes are indicated. The experience of designing the earthquake-resistant structures in other countries has been studied. The materials and documents about the past accidents in Russia and world’s other countries have been analyzed. The studying of the influence of the steel frames own vibrations and their constructional forms on the foundation’s pliability is also presented here.
Evaluation of railway stations as cultural heritage objects
Authors: Lisienkova L , Lisienkova T
Published: October 2020

This article touches upon different characteristics of evaluation of cultural heritage estate sites. The classification features of buildings wht can be descrived as railway stations and terminals have been specified. A functional analysis of objects like railway stations and other kinds of road junction construction sites and buldings for purposes of transportation system has showed that it is possible to identify and evaluate the consumer properties and usefulness of buildings based on its technical characteristics. The study of planning systems in terms of consumer preferences has allowed to identify their advantages and disadvantages. As a result several principles of complex assessment of cultural heritage estate objects for transportation system have been developed. Prospective studies can be related to the modernization of classical approaches to evaluation of real estate of transportation infrastructure with consideration of intangible value of cultural heritage objects.
Deflections of partially previously strained reinforced concrete constructions at repeated loadings
Authors: Bayramukov S H , Dolaeva Z N
Published: October 2020

The behavior of partially prestressed structures under repeated loads is considered. The effect of repeated loads on the deflections of partially prestressed structures is studied. The analysis of the deflections after the influence of the cycles of reloading on the deflections of partially prestressed structures at various levels of reloading carried out. It revealed that after the formation of cracks, the stiffness of the cross sections of the beams significantly decreases, because of which an acceleration of the increment of deflections observed. The linearity of the graphs of the dependence of the deflection on the moment violated: a characteristic break point appears, the deflection lines become convex in the direction of the load axis. In contrast to specimens without prestressing or fully prestressing, in the partially prestressed elements, three characteristic break points of deflection curves corresponding to crack formation, yield stress of tensile and non-tensile reinforcement can be distinguish.
Efficient and secure logistics transportation system
Authors: Kolesnikov M V , Lyabakh N N , Mamaev E A , Bakalov M V
Published: October 2020

The presented comparative characteristic of the values of the indicators of the Logistics Efficiency Index illustrates the problems of the transport and logistics complex of Russia. Consideration of the effectiveness of the transport and logistics complex from various perspectives (financial, production) made it possible to justify the need to formalize the relations (coordination of conflicting interests) of the participants in the logistics process, to ensure the internal integrity and security of the functioning of the transport and logistics complex. The solution to these issues was proposed by creating a special cyberphysical system using multi-agent systems, Internet of things, blockchain, and Big Data, Data Mining intelligent technologies. The presentation of the transport and logistics complex as a cyber-physical system made it possible to consider it in the following aspects: - as an interaction of agents based on multi-agent systems (information interaction is organized on the principles of blockchain and the Internet of things); - as a continuous process of transport services, the improvement of the technology of which is proposed to be carried out using the process and design approaches, a mathematical description - through models based on the theory of mass service and coordination of economic interests of economic entities; - as an artificial intelligence system based on Big Data, Data Mining technologies, including the theory of pattern recognition, game theory, methods of self-organization of models (for example, the method of group accounting of arguments), cognitive analysis and others.
Subjective travel time and transport system design
Authors: Romanova Elena
Published: October 2020

There are many complex tasks to be solved and many different factors to be taken into account during the design process of the optimal transport system. On the one hand, we have computer-aided design which provides an algorithmically optimal solution, but it does not take into consideration the preferences of people who use both public and private transport every day. On the other hand, experience-based designing has a limited sphere of application. So, the best result is given by semi-automatic design with subsequent expert evaluation. This scientific work analyses eight factors which should be laid down in the automated optimization algorithm and in the expert evaluation. These elements include travel time, possible delays, number of transfers/changes in multimodal trips, distance to stops, possibility of changing a route, vehicle comfort, possibility of productive time spending in a trip and travel cost. The factors mentioned above have an impact on the subjective perception of travel time and on making a decision about choosing a route and a vehicle. Taking these factors into account during designing a transport system will help to create an optimal traffic plan, increase passenger loyalty to public transport and reduce the amount of personal transport on the road during peak hours.
Competency-based approach to the development of a regional anti-crisis strategy based on the development of transport and logistics infrastructure
Authors: Shafieva Yulia , Kovalenkova Olga , Tekucheva Svetlana
Published: October 2020

The purpose of this study is to develop a regional development strategy in the conditions of overcoming the crisis on the basis of a competency-based approach, taking into account the existing transport and logistics infrastructure. Theoretical studies were carried out using methods of system analysis and generalization of existing scientific developments in the field of development of regions and their territories. Methods of observation and statistical analysis were used to determine the dynamics of the development of indicators, assess the level of influence of crisis phenomena on the gross regional product, and also to identify the competitive advantages of a particular region. As a result of the study, the following results were obtained: - an analysis of the state of the regional economy revealed the conditions that impede its further progressive development; - the use of a competency-based approach made it possible to determine the unique regional advantages peculiar only to the Rostov Region due to the fact that they act superior to other regions and allow its enterprises to maintain a stable position in the target markets; - based on the competitive advantage system, the main sectors of the economy of the studied region are identified, which, thanks to the multiplier effect, are potentially capable of ensuring its sustainable development in the conditions of overcoming the crisis caused by the pandemic of a new coronavirus infection.
Cargo transportation and commodity flows management
Authors: Pokrovskaya Oksana , Fedorenko Roman , Kizyan Natalia
Published: October 2020

Introduction: the subject of the study is the development of recommendations for improving the planning and organization of freight transportation and operational work in the framework of goods flow management and the effective interaction of transport market participants in the value chain. The relevance of this topic is associated with the implementation of the priorities of the Long-Term Development Program of the Open Joint-Stock Company Russian Railways until 2025. Materials and methods: analytical, marketing, design methods. Materials of general access and official sites, own research. Results: Authors have considered priority tasks that require a scientific and practical solution: building a compliance system; improving the planning and pricing system of integrated transport services; updating the concept of rationing the operational work of railways; distribution of quotas between companies - operators for the transport of goods; rating of operators’ companies; criteria for evaluating logistics activities and balanced scorecard. Conclusions: When implementing the proposal, Russian Railways will formulate tools for improving the planning and organization of freight transportation and operational work as part of the management of goods flows and the effective interaction of transport market participants in the value chain.
Experience of cosmogeological research on the basis of GIS-technologies (in case of South Nuratau)
Authors: Togaev Isomiddin , Umurzakov Rakhimjan , Nurkhodjaev Anvarbek , Romanov Sayfulla , Akmalov Shamshodbek
Published: October 2020

The purpose of the study is the creation of a new generation of cosmogeological maps-remote fundamentals of the study area based on the integrated use of satellite imagery using GIS technologies. Earth remote sensing (ERS) materials in the form of aerial photographs have been widely used for a long time in regional geological surveys, structural and geological studies, mineral exploration, hydrogeology and engineering geology, and many other areas of fundamental and applied geology. On their basis, thematic methods of geological interpretation of remote sensing materials were developed. As a result of the scientific and technological revolution, space research already significantly affect the acceleration of the pace of development of geological science and technology and bring a great economic effect. At present, the materials of digital satellite images obtained from Landsat 7.8 TM, Aster, etc. satellites and the method of their interpretation have led to the creation of a new type of cosmogeological maps - remote bases. The purpose of the research is the creation of a new generation of cosmogeological maps-remote fundamentals of the study area based on the integrated use of satellite imagery using GIS technologies. The article provides information about the remote basics of the cosmogeological map based on GIS technologies.
Structural tensors of generalized Kenmotsu manifolds
Authors: Abu-Saleem A , Kochetkov I D , Rustanov A R
Published: October 2020

The paper introduces the Kirichenko structural tensors of generalized Kenmotsu manifolds, called the first, second, and third structural tensors. The properties of structural tensors of generalized Kenmotsu manifolds are studied, analytical expressions of structural tensors are obtained, and covariant differentials of structural tensors are calculated.
Analog-to-digital data processing tools in the construction industry and in the transportation sector
Authors: Konikov A I , Fedoseeva T A
Published: October 2020

In many applications in the construction industry and in the transportation sector, it is necessary to convert the original analog information into digital form and transmit this information for further computer processing using the appropriate interface. The question of the correct choice of conversion means (analog-to-digital converters, ADC) and transmission means (interfaces of peripheral devices) is very important because the characteristics of these devices largely determine the quality of the system. Meanwhile, in this area there is a fairly wide range of modern solutions, new trends are observed, which should be taken into account by system developers. Often systems are operated in conditions of high levels of industrial noise and interference. In a number of applications, it is required to process the signals of sensors (for example, building condition sensors) with very high accuracy with moderate processing speed requirements. The choice of a solution is significantly affected by the fact that modern building condition monitoring systems, automated control systems for technical processes in construction, and other systems are built on the basis of microcontrollers. In this study, the above issues are considered comprehensively, on the basis of this, possible solutions are proposed, practical recommendations are given.
Intelligent street lighting technologies for transport operation
Authors: Voskresenskaya Elena , Vorona-Slivinskaya Lybov , Tilinin Yury
Published: October 2020

The paper discusses a modern concept of smart street lighting that for illuminating city streets implies the use of special street lamps controlled via intelligent platforms. These platforms can regulate the intensity of lighting according to environmental conditions. At daybreak or when there is no people around, lamps’ brightness automatically decreases (or the lights entirely go down), which helps save electrical energy. As the result, expenditures from public funds on street lighting are reduced and the impact of electric power stations on the environment decreases. Street lighting is an essential part of the city infrastructure, since it performs several functions at ones. Firstly, it provides a sufficient level of illumination for traffic networks and pedestrian areas at night time, which not only enables reducing the number of traffic collisions and injuries, but also makes life of car drivers more convenient. Moreover, properly designed street lighting including street lamps on avenues, boulevards and in yards reduces the level of urban crime. Street lightning in Russia annually consumes approximately 7 billion kW/h of electric power, which is equivalent to 16 billion rubles. While producing such an amount of electric energy, millions of tons of various exhausts pollute the atmosphere. Smart street lighting systems help reduce the demand in electrical energy for outdoor illumination. The most important indicator of a civilized city is a well-lit roadway for transport – motorways. For transport on roads, various street lighting fixtures are used, but the most popular are energy-saving gas-discharge lamps, which effectively achieve full compliance with the standards and requirements for road lighting.
Architecture of cross-platform videoconferencing system with automatic recognition of user emotions
Authors: Duboyskii Ilya , Shabanova Aleksandra , Sivchenko Oleg , Usina Elizaveta
Published: October 2020

This paper considers implementation of the technology of automated detection of emotional condition and video conferencing technology for remote content delivery, such as transport communication systems, polls, lectures, psychotherapy sessions, etc. To establish remote communication sessions a platform-agnostic peer-to-peer architecture was developed. Convolutional neural networks are used for stream processing at the operator end, being utilized to estimate the emotional feedback of the customer. To define the emotional condition, three modalities (video, audio, text), as well multimodal recognition were used. Experiments for 10 pairs of humans were performed, where one of them acted as an operator and asked closed questions, whereas another answered these questions. The neural network shows the following average accuracy values for the individual modalities: video 76 %, audio 57 %. The best output is ensured by multimodal recognition (average accuracy of 80 %). These findings confirm the efficiency of multimodal recognition in videoconferencing systems for classification of human emotions.
Geometric modeling of the parallel approach method in some transport problems
Authors: Dubanov A A , Seveen A E , Tsyrenzhapov N B
Published: October 2020

This article presents a quasidiscrete geometric model based on the problem of simple pursuit on a plane by the method of parallel approximation. Apollonius and the characteristic lines associated with it in this geometric model for a predetermined trajectory are in the optimal path of the pursuer. The geometric model is also used in solving some transport problems: visualization, construction of calculation grids, etc. Modeling was performed in the computer mathematics system MathCAD. Based on the simulation results, an animation clip was created, where you can view the movement and transformation of the Apollonius circle and associated characteristic points and lines.
The effect of humidity on the tribological behavior of the carbon-carbon composite in brakes
Authors: Alisin V V
Published: October 2020

The article is devoted to the study of the humidity effect on the antifriction properties of a carbon-carbon composite material under the brake-applied mode. The effect of friction coefficient reducing due to the hygroscopic properties of this carbon composite is justified. The change in the friction coefficient and the composite structure during braking is investigated. In a macro scale it is shown that the structure of the samples working surface is isotropic both in the initial condition and after friction, which is due to the specific location of the fibrous carbon filler (reinforcing frame) in the volume of this carbon-carbon composite material. Based on the theory of errors, metrological assurance for evaluating the reproduction of experimental data was performed. Based on the obtained quantitative data on the reduction of the friction coefficient and the “drying” time of wet friction surfaces, practical recommendations are defined to ensure the effectiveness of vehicle braking arrangements.
Method for obtaining a differential equation of the asphalt concrete mix behavior under railway transport load
Authors: Shishkin E A , Kovalenko A S
Published: October 2020

The use of asphalt concrete in the railway track construction allows you to ensure high strength and stability of the railway. The supporting asphalt layer is subjected to force from the railway transport. The study of material behavior under load is of great practical importance. Rheological modeling is a popular tool for studying the behavior of a material under load. The accepted rheological model is described by the corresponding differential equation. Establishing the initial conditions of a differential equation is difficult if its order is 2 or higher. The article describes an establishing initial conditions method for solving the rheological equation of the model. The model’s behavior analytical description over an infinitesimal time period allows you to set initial conditions. The proposed method for establishing the model equation initial conditions simplifies the process of material under load analytical description. This approach to the asphalt concrete layer under load study allows a more conscious approach to the choice of its parameters when designing the railway track elements.
The study of the dynamic problem of vibrations of a reservoir with liquid on an elastic foundation
Authors: Pavlova A V , Rubtsov S E , Telyatnikov I S
Published: October 2020

A limited or semi-limited layer of a compressible liquid is usually adopted as model of hydro constructions of various purposes. This paper presents the results of analytical study of the distribution of contact stresses at the interface between an elastic layer and a limited pool of liquid. In the system «elastic medium – liquid» the harmonic oscillations are excited by surface vibration source. In this work the integral equation of the first kind with kernel depending on both difference and sum of the arguments is obtained and solved, the function describing the distribution of contact stresses in the area of contact between liquid and elastic media with consideration of physical and frequency factors is also built. The described model can be used in the development of more complex models that allow the determination of the main characteristics of the contact interaction in hydroelastic «liquid – soil» systems.
Experimental studies of the transport speed of immersion of pea grains in liquid
Authors: Saitov V , Farafonov V , Saitov A , Malykh T
Published: October 2020

The basis of leguminous crops is peas, which have a food value for human nutrition. Peas are also used as concentrated and green feed, silage, hay, and hay flour. Pea seeds are susceptible to various diseases. One of the main reserves for increasing the production of pea grain is the use of seeds that are cleared of various impurities for sowing and pre-treatment with chemical preparations against pathogens. An effective method of protecting pea seeds from various diseases is wet treatment with bactericidal preparations with the simultaneous use of biologically active substances. To develop a device for processing seeds by wet method, research was conducted on the transport speed of immersion of spherical grains in liquid. When conducting practical experiments, we considered the movement in a liquid with a density of ρzh = 1000, 1090 and 1150 kg/m3 of individual pea grains of the Vita variety (spherical shape) with a moisture content of 14%. Sodium chloride salt (NaCl) was used to change the density ρzh of the liquid. To obtain more reliable information, the experiments were performed three times over. The temperature of the surrounding air and liquids of different densities was 20 °C. The data obtained were processed using one of the methods of variation statistics. It was found that in water (ρzh = 1000 kg/m3) the confidence interval of the transport speed of immersion of single grains with a reliability of, and in an aqueous solution of sodium chloride (NaCl) with a density of ρzh = 1090 and 1150 kg/m3, respectively, 0.10-0.28 m/s and 0.09-0.23 m/s. This approach to determining the transport speed of grain immersion in liquid can be used in the development of a machine for etching pea seeds using a wet method.
Development of a system for electric power consumption control by electric rolling stock on traction tracks of locomotive depots
Authors: Istomin Stanislav
Published: October 2020

The paper deals with the problem of increasing the energy efficiency of train traction. The analysis of energy resources consumption of JSC “Russian Railways” is made and options for saving fuel and energy resources of the company are formulated by reducing unproductive losses of electricity by electric rolling stock of railways during their standstill on traction tracks and at points of turnover of locomotive crews. The analysis of existing methods of control of electric power consumption by electric rolling stock on traction tracks of locomotive depots is performed. The considered manual control method has the following disadvantages: the lack of completeness, timeliness and reliability of data on electricity consumption. The second method, which consists in installing measuring systems on the feeders of traction tracks, has the following disadvantages: it does not allow automated metering and rationing of electricity with details on the operations performed (shunting movements, heating of electric locomotives), drivers, series of electric rolling stock, as well as legitimately attributing unproductive electricity consumption and damage from it to the involved structures (Traction Directorate, Directorate for repair of rolling stock, LLC “STM-Service”, LLC “TMH-Service”, Directorate of motor car rolling stock). The third method, which consists in installing a low-voltage power supply device on traction tracks, is not applicable when operating electric locomotives at low temperatures, since in this case it is necessary to warm up powerful consumers, such as liquid pumps, oil pumps, motor-compressors, motor-fans, etc.; most of the electric rolling stock is not equipped with specialized sockets for connecting a low-voltage power supply device, which limits the serial implementation of this device. An alternative system of control of electricity consumption by electric rolling stock traction on the tracks of the locomotive depot was developed, which has the following advantages: implementation of automated metering and rationing of electricity with details on performed operations (shunting moving, heating of electric locomotives), drivers, series of electric rolling stock; improving the reliability of electricity metering; implementation of the possibility of attributing unproductive power consumption and damage from it to the involved structures (Traction Directorate, Directorate for repair of rolling stock, LLC “STM-Service”, LLC “TMH-Service”, Directorate of motor car rolling stock); elimination of the need for additional research for new series of electric rolling stock being put into operation; development of scientifically-based measures to reduce power consumption.
Mathematical model of the vehicle taking into account the turn and reduction of tire friction
Authors: Efimov A , Kireev S , Korchagina M , Lebedev A
Published: October 2020

This work presents a mathematical model that takes into account a turn of a vehicle and the movement of the vehicle on a supporting surface with various friction properties in order to research the effect of a kinematic mismatch and friction decline to a coefficient reflecting the losses on wheel slip of a wheeled vehicle. According to the suggested approach, it is possible to select the type of an interaxle drive by comparing effectiveness of quantity indexes of the interaxle drive, while analyzing the full range of road conditions.
Control system of electric traction drive of electric vehicle
Authors: Pechenkina N V
Published: October 2020

The growth rate of electric transport production is increasing every year, so the issues of its improvement and development are relevant. The developmentof a traction electric drive control system that would meet all the requirements, it is the aim of the article. There is a strong weakening of the field, providing a quick change in torque. The results of the created electric drive system are obtained with simulation in the MATLAB. The control system provides the engine in traction mode, recovery mode, reverse, and also allows you to develop high torque at low speeds. The result is a trapezoidal velocity diagram and an almost rectangular moment diagram. When operating at higher speeds up to 400 rad/s, the system works stably. At higher speeds, moment fluctuations appear and dynamics deteriorates. Fluctuations in flux linkage are observed at a speed of more than 700 rad/s. The modeling also showed that the system maintains a constant voltage in the field weakening mode. The development of the control system in order to increase the torque at low speeds is possible due to the introduction of the controller of the balances of the real current of the machine and the current calculated in the engine model. The introduction of a dynamic field attenuation circuit serves to provide high torque when it is not possible to further increase the voltage of the motor stator.
Go-carting vehicles with electric drive
Authors: Guskov A
Published: October 2020

The article describes a number of technical solutions that made it possible to develop Russia’s first electric car for domestic go-cart racing, with a power reserve of 40 minutes of active driving, acceleration from 0 to 60 km / h in 9.5 seconds, with the ability to reverse, with functions energy recovery during braking. As battery cells, lithium-iron-phosphate cells were used. The article provides a calculation of the optimal battery capacity, based on the requirements for the mass-overall performance of the machine. The results of test runs of a serial model of cars with a power of 5 and 10 kW are presented. The calculations of the economic payback of a go-cart club equipped with electric traction machines are presented. The E-Cart, developed by teachers and undergraduates of the Department of “Automated electric drive” of the South Ural state University, has high performance characteristics. The technical solutions made it possible to achieve high acceleration dynamics and a range of 30 km. on a single charge, the “evenness” of the machines-the range of speed and torque when the battery charge level is from 15 to 100%.
Investigation of hydrodynamics and convection in the porous car heat exchanger
Authors: Soloveva O V , Solovev S A , Khusainov R R , Yafizov R R
Published: October 2020

Car engine cooling is actual problem today. The work considers the gas flow in aluminium open cell foam material with two different values of the porosity of the medium 0.9 and 0.7. Models of porous media with an ordered and random structure have been created; in both cases, the porous medium is constructed by a set of intersecting spheres. Numerical modelling of gas flow and heat transfer in a porous medium is carried out using the control volume method in the ANSYS Fluent software package (v. 19.0). The results of the calculation of the pressure drop correlate well with the results of calculations obtained by the semi-empirical dependence. Given the best mixing of the flow, convective heat transfer is more intense in the model of a porous medium with a random arrangement of cells. The highest porosity of medium 0.9 provides the lowest pressure drop and increases the value of heat transfer. It has been shown that in a porous medium of any geometry, the Nusselt number increases with increasing Reynolds number. In this case, open cell foam with a random arrangement of pores in space and a maximum porosity of the medium is preferred for use as a heat exchanger in transport.
Visual symbols as a tool of transport logistics in university environment
Authors: Pozdeeva E , Evseeva L , Tanova A , Kobicheva A
Published: October 2020

The development trends of the educational space in the direction of the increasing introduction of intellectual technologies actualize the study of visual symbols being used as transport logistics tools in management of educational trajectories of students. Visual symbols serve as markers indicating space and help students’ navigation by forming their identity, including professional one. The article analyzes the data of a sociological study of the visual elements of the educational environment of Peter the Great St. Petersburg Polytechnic University, conducted among students. The conclusion is made about the importance for students of the prestige of the university, traditional symbols, virtual attributes, as well as elements of everyday learning life as important components of the educational environment, which allows us to raise the question of the possibility of using these tools to improve their logistics on their way to developing professional competencies.
Experience in digitizing the services of public authorities in the transport sector
Authors: Savin I M , Sinenko S A
Published: October 2020

In the modern world, computer technologies 3D and VIM-modeling are being used more and more often, often you will not find architects drawing by hand. Digitalization of the construction industry is developing rapidly and in various directions. Modern construction organizations are actively introducing information technologies into their professional assets, which, in turn, will include the following business processes: starting from personnel selection, accounting, internal document management, planning, development and placement of advertising, search and customer support, procurement, production of goods, performance of work, provision of services, ending with control over the execution of contracts, and many others. Technologies of augmented reality, the Internet of things, 3D-printing, generative design, machine learning, technologies including three-dimensional representation of buildings and structures, premises and many other technologies that help make various decisions are of particular importance. The article outlines some considerations about digitalizing the functions of a contractor, technical customer in the construction of buildings. The future is fast approaching, and we are moving towards technological singularity. The issue of digitalization of the functions of a contractor, technical customer in the construction of buildings is relevant in modern conditions. Taking into account the importance of the changes that are taking place, it is necessary to start using BIM modeling for the contractor, technical customer, intended for use by the public and private customer, developer, technical customer, and contractor in order to plan and implement information modeling processes for construction projects.
Digital Railway as a precondition for industry, science and education interaction by knowledge management
Authors: Khabarov V I , Volegzhanina I S
Published: October 2020

Digital systems in railways known as “digital railways” have dramatically changed the railway industry and the nature of railway employees’ work. The Digital Railway is in a large extend linked with the knowledge-based economy, knowledge management and knowledge management technologies which have had a significant impact on digital transformations in the industry and professional education. An ontology characterized the cause-effect and aggregative relations reflecting transformation chains in the various spheres of human activity and shedding light on the Digital Railway place in the context of digital economy is presented. The article argues that the Digital Railway role in changing mechanisms of interaction between industry and universities, which are also specialized research centres with closer ties to the industry, is best understood applying to the idea of “a smart contract” that can be reduced to artificial intelligent agents serving as intermediaries providing interaction between the non-human and human roles in a business process. With the smart contract technology, the Digital Railway might provide a precedent in development of the Hybrid Corporate Intelligence based on industry-related knowledge redistributed between artificial intelligent agents and employees. From this perspective, the process of corporate informatization is seen through a system of artificial intelligent agents implying the formalization of operational rules and regulations into a shared knowledge base in a form of ontologies. The proposed idea can be transferred to universities where smart contracts may support professional training as a business process.
Digitalization of the transport industry: social-and-psychological emphasis
Authors: Leontev Mikhail , Magera Tatiana
Published: October 2020

The transport industry is currently undergoing digital transformation in almost all respects, which is replacing automation. The process of digital transformation of transport is closely related to the implementation of long-term development programs for Smart Cities. The changes caused by the digital transformation of transport will have a positive effect on every urban resident and on society as a whole, especially in terms of reducing travel time, the number of errors in traffic schedules, reducing the number of traffic jams and reducing the size of land allocated for parking, improving the environmental situation in cities. The authors, based on existing developments and the results of their own research, identified and characterized the social-and-psychological components of the scenarios of digital transformation of urban transport. It is necessary now to pay attention to such social-and-psychological emphasis of the digitalization of the transport industry, such as rising unemployment among drivers, the development of sharing and car-sharing against the background of a lack of psycho-emotional satisfaction from the services provided, and social and physical isolation. These negative factors are seen as a signal for the development of proactive actions.
Development of digital tax services in the transport industry in the Russian Federation
Authors: Pirogova Oksana , Zasenko Vilena , Medvednikova Daria
Published: October 2020

This paper is based on the analysis of the transformation of the tax system of the Russian Federation in the transport industry. We directly analyzed the tax monitoring system, its effectiveness, examined barriers to participation in this system, as well as the prospects for the development of this project in the transport industry. The analysis of the problems of the Russian Federation tax system in the context of digitalization in the transport industry is carried out and the ways of solving these problems undertaken by the state are analyzed. To analyze the solutions to the problem, it is proposed to identify the relationship between the implementation of the tax monitoring system and the number of participants in this program, and the growth of contributions to the federal budget of the country. To identify relationships based on the dynamics of the number of participants and tax deductions, a logistic curve was constructed reflecting the increase in the number of participants in the tax monitoring system in the future, as well as a regression model. A direct relationship between the analyzed factors was obtained, and the effectiveness of the transformation of the state tax system in the context of digitalization in the transport industry was proved. The proposed models can be used to assess the correct implementation of the measures taken to solve the problems of the tax system of the Russian Federation in the transport industry.
Modelling of project planning processes in high-tech technologies in the development of intelligent transport systems
Authors: Matveykin V , Nemtinov V , Dmitrievsky B , Terekhova A , Praveen K
Published: October 2020

The article describes the task of modeling a project for the development of a research and development management system (R & D) in transport sectors. The economic essence of the tasks is determined, the necessity of using information technologies is justified, the cost price calculation is formalized, design decisions are justified, informational support of the task complex is developed in the development of intelligent transport systems. Informational support of a set of tasks was developed, its software implementation was considered: data flow diagrams and functional diagrams were presented, and a system operation scenario was described. The management system solves the problem of determining the composition of research workers, calculating the planned and actual cost, the formation of contracts for the execution of work and the control of their payment cost analysis. The proposed management system can be used for any organizational structure of the enterprise and activities. The importance of solving to driven by energy efficiency in the transport sector. After the implementation of the system, the number of executed contracts will increase, profit from this area of the enterprise’s activity will increase, and the cost of processing information will also decrease.
Analysis and digital transformation of the transport sector of the Eurasian Economic Union
Authors: Gibadullin A A , Morkovkin D E , Hutarava I I , Stroev P V , Pivovarova O V
Published: October 2020

The presented study is devoted to the assessment of the transport complex of the Eurasian Economic Union and the formation of conditions for its digital transformation. As part of the work done, it was revealed that the transport complexes of the member states of the Eurasian Economic Union were created during the period of centralized government and directive planning of the transport industry. The analyzed indicators of the transport system of the Union showed an increase in the volume traffic. At the same time, it was found in the work that further convergence of transport complexes is required to increase the efficiency of the supranational transport industry. The study proposed a model of digital transformation of the transport complex of the Eurasian Economic Union, which will ensure further convergence of the transport industry and increase the efficiency of the entire supranational complex.