bluuebunny/crossref_metadata_2025 huggingface dataset:
Friction coefficient research at refining of fibrous semi-finished products
Authors: Vikharev S N
Published: September 2020

An object of research of article is the friction coefficient at refining of fibrous semi-finished products in the knife refining machines. The main consumed energy of these machines is spent for overcoming friction of rotor about stator. On the basis of the theory of contact interaction of knives the tangential coefficient of friction between rotor and stator is investigated. This coefficient depends on type of friction of rotor and stator, concentration and type of fibrous semi-finished product, pressure in an interknife gap, the given module of elasticity of material of plate, the area of contact and speed rotation of rotor. Recommendations for decrease in power consumption of process of refining are developed.
Algorithm for automatic classification of images of the processed surface by quality
Authors: Rastorguev D A , Sevastyanov A A
Published: September 2020

The paper considers the solution to the problem of developing an algorithm for automatic classification of the processed surface quality on the example of hard turning of 105WCr6 steel. The input data for the algorithm are digital photos obtained on a metallographic optical microscope “Labomet” with an x4 magnification. The developed algorithm successfully solves the problem of binary classification, where the classes are groups of samples with high (acceptable) and low (unacceptable) quality of the processed surface. The algorithm is based on the search for a template corresponding to a characteristic defect in hard turning on a converted digital image of machined surface. The results can be used to automate scientific research.
Simulation of layout schemes of soil-throwing machine-tractor units based on articulated load-bearing machines
Authors: Gnusov M A , Drapalyuk M V , Lysych M N , Druchinin D Yu , Petkov A F
Published: September 2020

The work is devoted to the study of possible layout options for various soil-throwing machine-tractor units using the 3D-CAD SolidWorks system. In the process of research, three basic mass-produced models of wheeled traction devices were selected. This is the T-150K tractor, the DZ-122 grader and Amkodor 2661-01 forwarder. Its simplified 3D models were created, while all the basic geometric parameters were saved. At the next stage, the mass-inertial characteristics of the main moving elements were set by applying the properties of materials from standard libraries to it. These are wheels, suspension elements, linkage mechanisms of working equipment, front and rear frames. To compensate for the mass-inertial characteristics of the stationary elements located on the front and rear half-frames, spherical elements were added, with the possibility of changing the spatial position and mass. To study the possibilities of aggregation, simulation 3D models of three types of soil throwers were created: heavy mounted, mounted medium, light manipulator. Also, various types of additional tillage equipment were modeled: stripper harrows, strip cultivators. Next, ten versions of the most promising soil-throwing machine-tractor units were arranged. The coordinates of the center of gravity of the aggregates and the mass-inertial characteristics were obtained and analyzed. In the future, the developed models can be studied on static and dynamic virtual stands using the methods of multibody dynamics (MBD), for example, in the integrated environment for engineering calculations SolidWorks Motion, or exported to specialized programs, for example, MSC.ADAMS.
Improving the efficiency of forest fire prevention and suppression with of forest fire machine
Authors: Gnusov M A , Popikov P I , Malyukov S V , Sherstyukov N A , Pozdnyakov A K
Published: September 2020

One of the main difficulties in combating forest fires with conventional water-based methods is the difficult topography and the fact that there are usually no accessible roads to bring firefighting techniques closer to the fire site. Today, a large number of scientific teams are working on the topic of extinguishing the edge of a forest fire with soil. The aim of the study is to increase the efficiency of forest fire prevention and extinguishing by ground-throwing machines by removing the upper combustible layer of forest soil, the formation of a loosened soil shaft from the mineralized layers of forest soil and throwing soil into the edge of a forest ground fire. The paper briefly describes the technical means for extinguishing forest fires using soil. The analysis of the structures of soil-throwing machines has been carried out. The promising directions for improving the technology and working bodies of fire-fighting ground launchers are described, the advantages and disadvantages of its designs are revealed, and ways of further improvement are outlined. A promising design of a strip-laying soil gun with a hydraulic drive of working bodies for preventing and extinguishing forest fires is presented. A distinctive feature of the developed design of the strip-laying soil launcher is the use of an auger to remove the upper fire-hazardous cover, consisting of plant residues, and cut spherical discs to improve the quality of loosening the soil shaft. As a result of the conducted studies of the working process of the strip-laying machine, it was found that the share of the soil covers with combustible materials in the soil flow decreased from 40 to 7%, and the quality of soil shaft loosening increased by 17%, due to which the average distance of soil ejection increased from 10 to 15 m and the power consumption of the rotor-thrower is reduced from 12 to 10 kW.
New technologies to succeed the rooting process of rootstocks in agriculture engineering in Vitro
Authors: Bamatov I M , Kimaev Z V , Bamatov D M
Published: September 2020

The aim of this article is to illustrate the integration of new technologies in agricultural sector, especially in biotechnology laboratories in Vitro. The new technology applying in this project is an automation process of virus - symptom detection in the micro –cut rootstocks that are planted on nutrient medium. Additionally, the comparative analysis of laboratories with and without an automation process on subject-rooted plants in Vitro on the same nutrient medium will be also studied. The annual profit was in this project calculated to be 1.8 mln Russian ruble due to the integration of an automatic system into the laboratory in Vitro.
Study of the possibility of upgrading the mechatronic system of an isotopic thickness gauge in a cold rolling mill
Authors: Belyi A
Published: September 2020

The paper considers the possibility of installing a device for positioning reference metal samples in the measuring channel of an isotopic thickness gauge at the cold rolling mill of the Magnitogorsk Iron and SteelWorks. The need for modernization is due to the increased background radiation in the zone of operation of the device. Additional positioning system for reference samples allow to consider the object of modernization as a complex mechatronic system.
Control and remote monitoring of the vertical machining center by using the OPC UA protocol
Authors: Martinov G M , Nikishechkin P A , Khoury A Al , Issa A
Published: September 2020

The article discusses the possibilities of using the OPC UA protocol to collect information from CNC machines and graphically represent data about the technological process, according to Industry 4.0 concept. A generalized organization structure of NC kernel with an embedded SoftPLC module, OPC UA server and various types of OPC UA clients has been developed. The mechanism of interaction between the NC kernel and the standalone OPC UA server is proposed. The possibility of developing a remote OPC UA web client based on the Node-red programming tool has been investigated.
Engineering methods and technologies of remote sensing in an economic entity for the transition to a highly productive agricultural sector
Authors: Bamatov Ibragim M , Daudov Ismail L
Published: September 2020

The aim of this article is to illustrate an integration of methods, abilities and the usage of remote sensing in agricultural part of economy. In this project it was clearly stated that, the use of remote sensing in agricultural sector is based on the interaction of electromagnetic radiation with soil or vegetation and refers to the non-contact measurement of radiation reflected or emitted from agricultural fields. Different types of platform for measurements were listed in this research work such as: satellites, aircraft, tractors and handheld sensors.
Improvement of the material and production resources control in the construction industry
Authors: Saidova M Kh , Xodjimuxamedova Sh I , Dadarbaev M A
Published: September 2020

Ensuring effective and smooth functioning of construction organizations is impossible without the use in the activity inventory. The lack of effective operations management for the procurement and purchase of materials and accounts payable leads to errors that have a significant impact on execution of plans to completion of construction, the overstatement of the cost of new and previously rendered services, which in turn affect the profit and profitability of a construction company. Delays in delivery of materials leads to the violation of the rhythm of work of the organizations, downtime, requires additional labor costs, affects the quality of the products and degrades the technical-economic indicators of construction, in turn, the rhythm of delivery and accounts payable leads to the need for reform scope of work, failure to fulfil contractual obligations for its surrender, and economic sanctions. The purpose of this article is to study theoretical and methodological aspects of management of material - industrial stocks and their current state in construction organizations. On the basis of the studied materials, the findings for improving the system of control of inventories of construction organizations, including the introduction of modern inventory management systems, which are now very popular in the European market but not yet used by construction organizations of Uzbekistan. The subject of the study was inventory of construction organizations “PARKENTSUVQURILISH”, which is a company with Russian capital. In this regard, the guidelines may be used both Uzbek and Russian organizations in the construction industry.
Industrial business strategies towards a knowledge economy
Authors: Gurjanov A V , Shukalov A V , Zharinov I O
Published: September 2020

The industrial economy (IE) basic principles transformation in the modern stage led to creation of further more perfect forms of business conduct oriented for the production sector. The economic relationships subjects in the post-industrial period are defined as a business-incubator (BI), a business-polygon (BP) and a business-cluster (BC). A BI develops a virtual clone of an object with computer multi-optional modelling methods. A BP provides the product manufacturing with a cyber-production. A BC is for the business working environment on the branch scale with cooperation and commercial companies competence principles. The key advantages of the post-industrial economy are defined as the product end consumer interests to justify the novation approach for the new companies business processes realization. There is a scheme of economic relationships industrial subjects evolution, which commercial projects are oriented for a customer. Customer individual demands orientation and innovation ways of item manufacturing application get the modern business closer to the knowledge economy (KE). The direct transition from the IE to the KE is practically impossible so that why soon enough the business has to adapt to the global post-industry.
Methodology of determining benchmarks and indicators characterizing the functioning of the enterprise quality management system
Authors: Kirov A V
Published: September 2020

At the present time interest at industrial enterprises is increasing from year to year, both in the implementation of quality management systems and in an adequate assessment of their effectiveness in the operation process. Performance assessment allows you to quantitatively determine the degree of implementation of planned activities and is used in the process of analysis the quality management systems by leadership as one of the sources of information characterizing the state of the system. At the same time, nowadays there is no unified criterion for evaluating the effectiveness of quality management systems, therefore, each company individually choose benchmarks and indicators characterizing the quality management system and methods of their determinaning. This article proposes an universal method for determining benchmarks and indicators characterizing the functioning of the quality management system of enterprises participating in the product life cycle. The methodology establishes a list of indicators of different levels, determines the totality of the initial information proposed for use in determining benchmarks and indicators for monitoring the effectiveness of quality management systems, and proposes a calculation of the main benchmarks and indicators. The developed technique can be implemented for assessing the effectiveness of the quality management system of enterprises of industry participating in the product life cycle for compliance with the requirements of ISO 9000.
Optimizing supplier reserve stocks in the supply chain
Authors: Milekhina O V , Mamonov V I
Published: September 2020

The formulation and solution of the problem of determining safety stocks in a linear technological chain consisting of suppliers in a network structure is considered. It is assumed that the conditions for the production of suppliers in terms of throughput are quite sufficient to ensure deliveries on time in the required volume. The allocated volume of resources in the supplier’s production system for these purposes cannot be predetermined precisely. It is a random variable that changes in a certain interval, which is actually confirmed statistically. Reducing losses from downtime of technological equipment is ensured by the creation of reserve stocks. For solving the problem the method of dynamic programming is used, which allows one to determine the optimal values of safety stocks analytically.
Sustainability of public-private partnerships in the knowledge economy
Authors: Gurjanov A V , Kostishin M O , Zharinov I O
Published: September 2020

The evolution of civil society is taking place in a social and technical format. The generating function of technogenic reasons determines the actual model of the state economic system on the basis of synergy arising through deep penetration of the newest technologies in all spheres of human activity. Economy of knowledge forms a new round of civilization, activity of technological segment in which completely submits to opinions of stakeholders. Symbiosis of fundamental values of knowledge economy, public consciousness and technological resources is a world trend of transformation of society. At the transition stage, the crisis agendas of information and innovation economies transmitted to the knowledge economy must be successfully overcome. The technologies that have led to the improvement of advanced industry for decades to come have been identified. The scheme of transformation of production in accordance with the epochs of technological changes arising in the State is proposed.
The choice of informative features based on heterogeneous functionals
Authors: Mamatov N , Niyozmatova N A , Samijonov A , Juraev Sh , Abdullayeva B
Published: September 2020

One of the classical problems of the theory of pattern recognition is to reduce the dimension of the original feature space from dimension N to dimension N’, N’ < N. In the first works on pattern recognition, the task was to construct an informativeness criterion that maps N-dimensional to a space of lower dimension so that a solution can be made in this space. One of the advantages of this criterion is that the classification in a space of lower dimension is faster and easier, and the criterion of being constructed once.
Analysis of leasing efficiency for the lessor
Authors: Kirillov Yu V
Published: September 2020

The article analyzes the conditions under which the economic activity of a leasing company as a necessary link between manufacturers of modern machine-building equipment and machine-building enterprises is cost-effective. Because the lessor can simultaneously act as the lessee or purchaser of equipment from a manufacturer on the one hand, and as the lessor of this equipment for machine-building enterprises on the other hand, analysis of the effectiveness of its activities carried out in the form of efficiency of financial inflows and outflows of the tenant and the landlord as an investment project. Economic and mathematical analysis of lessor’s net present value was carried out for four variants of such a project: there are two variants when the lessor acts as a lessee and lessor, as well as a purchaser and lessor when using equity, and two similar variants when using loan capital. As a result, quantitative ratios are obtained that determine the economic conditions for the effectiveness of the lessor’s activity as a necessary intermediary in the machine-building industry.
Features addition and dimensionality reduction in classification
Authors: Petrusevich D A
Published: September 2020

In the paper additional features are constructed in order to increase accuracy or other precision values in the original classification task. This technique is implemented vey often in a lot of machine learning tasks of various domains of knowledge. Usually the second degrees of source features and their products are used. But this process can be continued further to higher degrees. At the same time it increases dimensionality of tasks dramatically. The balance between the dimensionality problems and new features addition is discussed in the present work. The principal component analysis is used to reduce the dimensionality. These sequential steps allow to construct new space containing new features that depend from the source parameters non-linearly. The technique is discussed on the example of the heart diseases dataset. Also functional dependencies in the medical dataset are observed.
The innovative development of the mechanical engineering
Authors: Tazetdinova A S , Bayaskalanova T A
Published: September 2020

This article deals with the theoretical foundations and conceptual thesis of forming a strategy for innovative development of the machine-building industry enterprises. Various approaches of national and foreign authors to the definition of “innovative development” and “mechanism” are presented and analyzed. To identify the priorities of engineering enterprise innovative development, this research describes the main stages of forming a strategy for innovative development of the machine-building industry enterprises, taking into account regional innovation opportunities, which is based on a subjective and objective assessment of the state of innovative activity of industrial enterprises as well as identifying factors that stimulate and hinder the innovation process.
Efficiency of implementing the matrix management model in the enterprises of military-industrial complex
Authors: Ragozina M A , Anikina Yu A , Malanina Yu N , Yushmanova V A , Novoselsky N K
Published: September 2020

To assess the efficiency of implementing the matrix management model, the article analyzes the enterprises of the military-industrial complex of a specific region – the Krasnoyarsk territory. In the Krasnoyarsk territory there are several enterprises engaged in the production of military-industrial products. The article considers three of them, and namely the joint stock company “Information Satellite Systems named after academician M.F. Reshetnev”, the joint stock company “Krasnoyarsk Machine-building Plant” and the joint stock company “Scientific and Production Enterprise “Radiosvyaz”. The article postulates and declares that the matrix structure is the most effective for management and sustainable development of the enterprises.
Electronic engineering resources in charts and comments
Authors: Galkina A I , Grishan I A
Published: September 2020

This article is devoted to the analysis of electronic resources of mechanical engineering – mechanical engineering as a science, education and industry. The article is based on statistics of the joint Fund of electronic resources “Science and education” (Ofernio) for the period from 1998 to the present. The selection of information about engineering developments and statistical processing is carried out automatically by the collector_stat program developed by the authors of the article. Electronic resources of mechanical engineering are represented by technical universities of the country. Thus, the object of research Ofernio are technical universities. The subject of research is electronic resources of mechanical engineering. Research methods art statistical methods and content analysis.
Consensus achievement method for a robotic swarm about the most frequently feature of an environment
Authors: Petrenko V I , Tebueva F B , Ryabtsev S S , Gurchinsky M M , Struchkov I V
Published: September 2020

Decentralized multi-agent robotic systems have many advantages over centralized ones. Such systems make it possible to distribute computational and communication operations between all its elements, and are also more resistant to the loss of individual elements of a swarm, but they complicate the implementation of complex high-level tasks. An example of such a problem is the selection of one of the possible alternatives, in which the swarm must choose the most favorable solution from a list of possible alternatives. This paper proposes an algorithm for reaching a consensus for robotic swarms deployed in scenarios in which they can choose one of the two most common signs in the external environment. The proposed algorithm is based on the calculation of the measured features of the environment, as well as the distribution of this data between robots. The algorithm was tested using the ARGoS simulator.
A robust soft demapper algorithm for OFDM communication systems
Authors: Mityagin K S , Levchenko A S
Published: September 2020

In this article, we propose a noise-robust joint channel estimation and soft demapper algorithm for OFDM systems which is based on log-likelihood ratio calculation that taking into account multiplicative and additive error variance. The simulation results show that the proposed algorithm outperforms conventional techniques, such as LMMSE channel estimation about 1.1-1.8 dB in threshold signal-to-noise ratio in different wireless mobile channels.
Precising the evaluation of radio information system reliability characteristics based on the empirical failure distribution
Authors: Kartsan I N , Zhukov A O , Timoshenko A V , Perlov A Yu , Ryabchenko D V
Published: September 2020

For highly reliable radio information systems the failures are quite rare phenomena leading to critical decrease in functional characteristics. At the same time, failure distribution may be a subject to rather complex laws, which together with a lack of real data makes it difficult to evaluate the reliability characteristics of the product. Achieving high accuracy of reliability characteristics evaluation is possible due to constant updating the parameters of the radio information system reliability model based on experimental data on the technical condition of the product components starting from the stage of its development. In this case, it is possible to determine the reliability characteristics based on current data on the performance of radio information system components based on the empirical failure distribution function. In this article we propose an algorithm for transferring to an empirical distribution and counting the characteristics (mean time between failures) of radio information system reliability based on it.
Digital media inventory algorithm for long-term digital keeping problem
Authors: Solovyev Alexander V
Published: September 2020

The previously considered problem of long-term digital keeping involves a multi-faceted integrated approach to its solution. This article is devoted to the algorithmic solution to the problems of reliability and technological aging of digital storage media, as well as changes in the hardware and software storage environment that occur over the long-term digital keeping. The article provides a brief overview of digital storage media with an estimate of the terms of reliable guaranteed storage of data on them. The problem of changing the hardware-software environment for storing digital data, the cause of which is the limited life of the software and hardware of information systems, is considered. As an algorithmic solution to the problems presented for the problem of long-term digital keeping, an algorithm for inventorying digital media is proposed. Its main aspects and rules of practical application are considered. The connection with the previously proposed algorithm for controlling the authenticity of digital data is indicated. The article concludes that the proposed algorithm, tested by practice, will solve the problem posed in the article. In conclusion, the development prospects of the proposed algorithm are considered.
Comparison between integer splitting cipher and traditional substitution ciphers, based on modular arithmetic
Authors: Alhussain Amanie Hasn
Published: September 2020

The integer splitting cipher is a special mathematical method that is proposed by the author and it can be considered as a generalization of modular arithmetic operation. In this cipher, each plaintext character is replaced on the base of another integer number with a sequence of k integers (k-splitting level) by the usage of modular arithmetic, so this cipher can be classified under substitution ciphers that are used the modular arithmetic during the encryption process. In this article the main differences among splitting cipher and four traditional substitution ciphers, which are Caesar, Vigenère, Affine and Hill, will be listed and as a conclusion we can notice that the splitting method complicate the statistical and semantic restoration of the plaintext from the point view of an unauthorized user. Furthermore, the decryption process of the splitting cipher meets the goal of Chinese reminder theorem, which states that it can recover an integer from a unique set of its residues modulo, so a comparison is conducted to show the main differences between the integer splitting theories and the Chinese remainder theorem.
New iteration parallel-based method for solving graph NP-complete problems with reconfigurable computer systems
Authors: Kasarkin A V , Levin I I , Sorokin D A
Published: September 2020

The paper presents a method of creating parallel-pipeline programs for reconfigurable computer systems based on iteration paralleling for the solution of graph NP-complete problems, which is different from others for processing the irregular sets with the elements accessed not by their addresses (like in arrays) but by values, the names of vertices and the graph arcs. It shows that the new iteration-parallel method is more efficient than the layer-parallel method when the available computing resource and the size of the solved graphs increase due to the significant reduction of the commutation connections.
Building a model of information signal propagation in a real electromagnetic communication channel
Authors: Pichugin V N , Soldatov A A
Published: September 2020

Modern organizations are characterized by a large volume of various information, both electronic and telecommunications. Therefore, it is important to have high-quality access to switching nodes that provide access to all important communication lines. In Russia, where the distances between localities are huge and the quality of land lines leaves much to be desired, the best solution to this problem is the use of satellite communication systems. To date, a large number of methods for modeling satellite communication channels are known. According to the estimates of computational complexity of the above methods, the running time of the simulation algorithms remains unacceptable. There fore, it is relevant to develop new modeling methods that differ from the known methods that have these estimates with their practical reduction. The main result of the research can be formulated as the development of qualitatively new methods for modeling the satellite communication channel, which will allow us to more fully consider the electrodynamic picture of signal propagation in the channel, take into account all errors and correct them in the future when designing a real channel. The developed models will allow us to evaluate the noise immunity of the signal in the channel, investigate the signal-to-noise ratio, effects in the troposphere and ionosphere during signal transmission, and solve the problem of signal propagation delay.
Bio-inspired information technology for multi-version design of highly reliable software systems
Authors: Kovalev I V , Kovalev D I , Testoyedov N A , Voroshilova A A , Kuznetsov A S , Koltashev A A
Published: September 2020

The main result of the research is the creation of a new model of multiversion design of highly reliable software systems, which allows taking into account the real-time mode in the operation of programs that are part of reliability critical applications. The problem of multiversion design of the highly reliable software systems is presented in the form of the well-known problem of covering the set, which made it possible to use bioinspired algorithms, in particular, ant colony algorithms, to solve it. The decision rule of the ant colony algorithm has been modified, which provides support for the implementation of bioinspired information technology, taking into account changes in the structure of the software system in real time. The proposed model and the performed modifications of the ant colony algorithm are the basis for the creation of new tools that implement software and algorithmic support for the effective multiversion design of the highly reliable software systems in real time.
The application of relational interactive logic to build logical triggers in event-driven systems
Authors: Kuzmin O V , Naumov D A , Zakharov D V
Published: September 2020

The paper proposes an approach to the building of logical triggers in event-driven systems using relational interactive logic. In general, a trigger is viewed as a system of logical equations and inequalities. The solution of the system, carried out by the execution of a SQL query, is the main one for the formation of alert or targeted notifications or for changing the parameters of the control action within a specific system. To automate the described approach, an example of a modular scalable architecture of an information system is proposed. It provides the creation of triggers based on systems of logical equations and inequalities, as well as their verification of their implementation within one or more data domains
An ontology-based knowledge representation in the field of cognitive functions assessment
Authors: Murtazina M S , Avdeenko T V
Published: September 2020

Ontology-based knowledge representation techniques are used today as well-proven tools supporting decision making. The paper proposes OWL ontology which accumulates knowledge about cognitive functions and methods for assessing cognitive functions. A brief overview of using the ontologies capabilities for representation of knowledge about cognitive functions assessment methods is given. An idea of the structure of ontology is presented. A certain set of class expression axioms and object property axioms also are given. The ontology is implemented in the Protégé 5.2 environment.
Client-server application framework based on an object-oriented network model
Authors: Romanov E L , Troshina G V , Menzhulin S A
Published: September 2020

The relationship between the business layer and the underlying data access layers is considered. The disadvantages of the traditional approach based on the relational database and the data access layer (DAO/ORM) are analyzed. A document-oriented database with built above it an object-oriented network model of data presentation is proposed. The integration with the business layer, automatic assembly of business objects using Java reflection without additional specifications, polymorphic storage and transfer of business entities in collections of the document-oriented database is supported.
Self-organizing technology for substantiating the properties of strength reliability of complex mechanical systems
Authors: Berman A F , Nikolaichuk O A
Published: September 2020

The issue of ensuring strength reliability remains relevant due to the insurmountable imperfections and/or violations of methods and means of its provision at all stages of the life cycle of Complex Mechanical Systems. The uncertainty of some properties of strength reliability leads to catastrophic failures. To improve the efficiency and quality of the substantiation of properties, we developed a self-organizing information processing technology based on the interaction of logical heuristic procedures. We also identified the main uncertainties and the method for their acceptable neutralization based on additional expert information.
Influence of different components of data error on the result of solving identification and approximation problems
Authors: Zhitnikov V P , Muksimova R R , Sherykhalina N M , Zhitnikova N I
Published: September 2020

The dependences of approximation and identification errors for solving problems of approximation of functions associated with the presence of various components of data errors in the numerical solution are investigated. Using the study of problems that have an exact solution, we found patterns of increasing errors associated with rounding numbers and conditionality of the matrix of the equations system. It is shown that the error of identification (finding the coefficients of representation of the desired function as the linear combination of the basic ones) can be significantly greater than the error of approximation, despite the fact that the second one was estimated using crude values of the coefficients. The found dependencies limit the accuracy of the solution for approximation of other functions. Artificial distortion of the original data by random error is applied. It is shown that the identification error increases rapidly with increasing degree of approximation polynomial and significantly exceeds the amount of distortion. It is also shown that an increase in the number of specified points leads to a decrease of identification and approximation errors caused by random perturbation, inversely proportional to the number of points. Using examples of approximation of various functions, it is shown that the result of approximation, and especially identification, significantly depends on the convergence of the Taylor series (or its absence) on the segment under consideration.
An experimental research of the ultra-wideband pulse propagation in a transdirectional coupler based on coupled striplines
Authors: Malyutin N D , Trenkal E I , Sychev A N
Published: September 2020

The propagation of short picosecond pulses in coupled strip lines with a phase velocity ratio of odd and even modes of 3:1 is considered. The feature of the separation of the input pulse between the three output ports without significant loss of energy due to reflection from the input in transdirectional couplers based on coupled strip lines is experimentally shown. As a result of the analysis, it was found that the spectral components of the pulse are separating between the ports of the transdirectional coupler.
The antenna system with signal polarization separation
Authors: Konovalenko M O , Sokolov V V , Trenkal E I , Malyutin N D
Published: September 2020

The results of the study of the electrical characteristics of the waveguide-coaxial structure of the polarization separator (orthoplexer) loaded by the waveguide irradiator under the influence of harmonic radiation in the frequency band and pulse signal are presented. The antenna system is designed to study partially-non-reciprocal backscattering of electromagnetic waves.
Innovation technologies and practical engineering solutions for smart city development
Authors: Proskurnin S D , Belyakova G Ya
Published: September 2020

The work is devoted to the analysis of innovative technologies and practical engineering solutions in justifying and assessing the impact of digital transformation of small towns on the quality of life of its citizens. The article reveals the features of digitalization of small cities and defines its main directions. The analysis of trends and directions of the digital economy development in Russia was carried out and the need of small towns in digital services was investigated. The elements of the directions of digital transformation are reviewed and described and its impact on the quality of life of citizens is substantiated. The main tasks of the development and implementation of the “Smart City” were identified and recognized on the example of the closed administrative-territorial formation “Zheleznogorsk”, Krasnoyarsk Territory. It is concluded that the digital transformation of cities and the development of new forms of public self-government will allow the formation of an environment and an active community capable of solving the strategic tasks of the municipality. In the conclusion, it was noted that the main tasks for the development of the directions for creating the Smart City project are the transition to platform solutions, the transfer and storage of data in cloud structures, the development of uniform technological regulations for access to data and the creation of additional services on their basis. In the future, the expansion of the range of services and an increase in the number of users can give an economic effect, ensuring an increase in the investment attractiveness of the territory, and the strengthening of economic ties between business entities.
Studying the switching order for a three-wire structure with modal reservation after failures
Authors: Medvedev A V
Published: September 2020

The paper considers a quasistatic analysis of the ultrashort pulse propagation was performed in a three-conductor structure with MR in a 50 Ohm path. The sequential faults of two types were considered: a short circuit (SC) and an open circuit (OC). It is shown that if the probability of which type of failure is greater is not known, then it is preferable to choose the middle active conductor before failures, since of all the options for failures, its maximum amplitude is less than that of the edge active conductor, and is 58 % to half of the EMF. If a failure of only one type (either OC or SC) is possible, then the preferred switching option after failures of the SC type is with the middle active conductor before failures, and after failures of type OC, it is option 2 with the edge active conductor before failures, since after failures the maximum amplitudes are less and are 58 and 50 %, respectively.
Use of a progressive web application for working with Earth remote sensing, topographic and cadastral data layers
Authors: Ginzburg I , Padalko S
Published: September 2020

This article proposes the use of the progressive web applications (PWA) for the geographic information systems’ (GIS) web user interfaces. The main advantages of this approach for GIS: use of arbitrary mobile and stationary devices; work in conditions of unstable connection to GIS server with fault-tolerant user input data delivery to the server, when the connection is restored; work offline with the information stored on client device, when the server is disconnected, and automatic synchronization of changed data, when the server connection is active; network traffic savings during data transfer. The above mentioned advantages are important for a number of practical applications in cadastral accounting and construction.
Mathematical simulation of the forecasting process of the fire hazard properties of substances
Authors: Korolev D S , Vytovtov A V , Kargashilov D V , Odnolko A A , Denisov M S
Published: September 2020

The article presents an original solution to the problem of fire hazard indicators of oil products determining using molecular descriptors and artificial neural networks. The modelling of the forecasting process was carried out on the basis of a neural network training algorithm with a teacher and an error back propagation algorithm. The resulting model makes it possible to determine the fire hazard properties of substances in real time without time span and other costs.
Mathematical modeling of theim pulse bubbling process of bulk mass by the coolant flow
Authors: Rogovskii I L , Palamarchuk I P , Kiurchev S V , Verkholantseva V O , Voinash S A , Sokolova V A , Gogolevski A S
Published: September 2020

The main directions of pneumodynamic system usage for storage of bulk agricultural products are bubbling and pneumatic mixing; loading and unloading of technological masses. During pneumodynamic impulse wave formation with alternation of supersonic and subsonic zones, which are limited by shock waves, sound force increasing on the technological mediumabout 150…170 dB, pressure increasing on the product mass due to compression-stretching at the pulse limits to amplitudes of 6…15 barare caused, that promotes implementation of loosening processes during the grain material storage. The developed scheme of the studied process involves the opposite arrangement of pneumatic impulse generators, which allows the formation of a stationary wave, that spreads the pulse energy in both longitudinal and transverse directions, covering the maximum space of the free flowing technological medium. Using the method of D’Alembert for solving the equations, methods of mathematical analysis and their processing in the MathCAD mathematical environment graphical and analytical dependences of force parameters of oscillatory system have been obtained. Choosing an effective mode of pneumodynamic loosening, the force pulse magnitude and the regularities of its change under conditions of the highest mechanical resistance of the free-flow mass have been used as the evaluation criteria the standing wave energy.
Fuzzy quality evaluation of the information system
Authors: Smirnov V A , Milova V M , Getmanova G V , Kurlov V V
Published: September 2020

The article considers the task of assessing the quality of an intelligent decision support system for monitoring complex technical systems. A hierarchical system of indicators of the information system quality is presented, with account to the specifics of the subject area. It is proposed to use information power as a generalized indicator of the quality of the upper level which is formed from group indicators of the 1st level: information potential, functional suitability, level of performance, compatibility, usability, reliability, security and maintainability. To aggregate heterogeneous indicators, both quantitative and qualitative, at various levels of the system hierarchy, measured on different scales and having a different range of values, an approach based on a fuzzy classification of parameter values and fuzzy inference using the Takagi-Sugeno algorithm is used. The quantitative assessment of the indicator is supplemented by a qualitative assessment, expressed in the form of a linguistic description and the degree of evaluative confidence in the result of the assessment, which is understandable and convenient when used in the decision development process. The considered structure of quality indicators and a fuzzy model for their assessment can be applied in the quality management of existing and promising decision support systems and automated information systems.
Bayesian model for evaluating the pragmatic efficiency of an information system of technological control
Authors: Smirnov V A , Milova V M , Milova N V , Smirnova M S
Published: September 2020

The article considers the problem of assessing the effectiveness of an intelligent decision support system for controlling complex technical systems at the level of a technological control system. To build a model for assessing the effectiveness of an information system, a pragmatic approach to measuring the value of information and an intelligent technology for forming a solution based on a Bayesian trust network were used. As an indicator of the pragmatic efficiency of the information system, it is proposed to use the pragmatic efficiency coefficient. It is determined by the increase in the probability of achieving the goal set for the technological control system, achieved through the use of additional information in decision-making. It is proposed to use the probability of error-free and timely execution of control as a target indicator characterizing the quality of control performance. The determination of the values of the target indicator of the control system with and without the use of the information system is carried out using the Bayesian trust network, which takes into account the relationship of the most significant elements of the technological control system. In comparison with the known methods, the proposed approach to assessing the effectiveness of an intelligent decision support system is based on joint use: a model for measuring the value of information and an adapted Bayesian model for calculating a target quality indicator. The approach considered in the article makes it possible to determine the coefficient of pragmatic efficiency, taking into account the value of the information produced to achieve the set goal and the uncertainty of the initial data.
Simulating of the heat conduction processes and their impact on the stress-strain state of the continuously welded rail structure
Authors: Fazilova Z , Loktev A , Shapran V
Published: September 2020

One of the most important parameters when laying and maintaining of continuous welded rail track is the stress-free temperature of continuously welded rails at constant duty of operation, however the regulatory documents do not take into account the thermal stress occurring in continuously welded rails due to deformations on the solid subgrade. The expansion of continuously welded rails laying territory in the sections with complicated engineering and geological conditions requires to study this issue and to develop recommendations for further operation of the continuous welded rail track in the zone of permafrost sedimentary soils. The paper presents the results of simulating of thermoelastic processes due to uneven heating of special elements of the continuous welded rail track structure.