ТЕХНИЧЕСКИЕ НАУКИ

DOI: 10.12737/2219-0767-2023-16-3-7-20

V.F. Asminin1, E.V. Druzhinina1, S.A. Sazonova2

Modeling and computer visualization of the process of sound waves passing and scattering in a lightweight soundproof panel with a corrugated diamond-shaped structure
  • 1Voronezh State Forestry Engineering University named after G.F. Morozov, This email address is being protected from spambots. You need JavaScript enabled to view it.

    2Voronezh State Technical University, This email address is being protected from spambots. You need JavaScript enabled to view it.

  • Acoustic screens used at industrial enterprises for noise reduction and creation of comfortable working conditions are considered. It is proposed to use a new design of a portable lightweight soundproof panel with a corrugated diamond-shaped structure. The results of mathematical modeling of the process of sound transmission and propagation in a portable lightweight soundproof panel are presented. Modeling of sound propagation in the studied medium was performed by using a mesh model with concentrated parameters. The mathematical model is a system of differential equations, the solution of which makes it possible to determine the mechanical behavior of the system based on the specified parameters. The Runge-Kutta method of the second order was used for the numerical implementation of the mathematical model. An analytical formula is obtained for the nodes in the design scheme depending on the parameters of the sound-proofing panel under study. The developed model, due to its versatility, allows us to model the propagation of sound with the most diverse characteristics. Three types of sounds were selected for the main computer experiments: sinusoidal, single pulse of straight-angle shape, single pulse of Gaussian shape. The calculation of the characteristics of sound absorption is performed. An algorithm for the passage of sound through a soundproof panel has been developed. The initial and boundary conditions and assumptions of the model are given. The software implementation of the model has been performed. The results of computer modeling are present-ed and analyzed, proving the effective sound absorption of the proposed portable lightweight soundproof panel.
  • Ключевые слова — Mathematical modeling, differential equations, computer experiment, grid method, Runge-Kutta method, portable lightweight soundproof panel with diamond-shaped structure, sound insulation.

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  • С. 7-20.

DOI: 10.12737/2219-0767-2023-16-3-21-30

E.N. Epifanov1, V.F. Asminin1, S.A. Sazonova2

Mathematical modeling of processes in the sound field of premises with speech notification
  • 1Voronezh State Forestry Engineering University named after G.F. Morozov, This email address is being protected from spambots. You need JavaScript enabled to view it.,This email address is being protected from spambots. You need JavaScript enabled to view it.

    2Voronezh State Technical University, This email address is being protected from spambots. You need JavaScript enabled to view it.

  • The problem of improving the intelligibility of the sound signal of the sounder, taking into account the background noise and noise interference, is considered. Mathematical modeling of processes in the sound field of premises is carried out taking into account the influence on the intelligibility of the speech signal of the structure of the sound field formed by speech fire alarms. The important components of the structure of the sound field formed by speech fire alarms, which affect the intelligibility of the speech signal, are considered. The modeling takes into account the level of background noise, which can complicate the audibility of speech and reduce its quality. It is also taken into account that the direct sound and the reflected component are parts of the sound field and affect the overall structure of the sound environment. The structure of the sound field is represented graphically. Mathematical models are given to determine the density of sound energy. The figures show a scheme for calculating interference and useful components of the sound field during the operation of one sounder, as well as graphs of the useful signal and interference that occur during the operation of three sounders. A general approach to determining the useful signal and interference from three alerts is considered. The considered approach to the evaluation of the structure of the sound field used in the software package makes it possible to clearly divide the incoming sound signals into useful components and interference, and it can also be useful in various fields.
  • Ключевые слова — Mathematical modeling, structure of the sound field of premises, speech fire alerts, intelligibility of the speech signal, sound energy density, direct sound, reflected energy, background noise.

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  • С. 21-30.

DOI: 10.12737/2219-0767-2023-16-3-30-41

E.V. Grosheva1, P.A. Chubunov2, E.V. Shmakov3, V.K. Zolnikov4, E.I. Skvortsova4

Testing and compilation of digital block models in the CAD software and analytical complex
  • 1JSC «Scientific Research Institute of Electronic Technology», This email address is being protected from spambots. You need JavaScript enabled to view it.

    2JSC «United Rocket and Space Corporation», cрThis email address is being protected from spambots. You need JavaScript enabled to view it.

    3JSC «Micron», This email address is being protected from spambots. You need JavaScript enabled to view it.

    4Voronezh State Forestry Engineering University named after G.F. Morozov, This email address is being protected from spambots. You need JavaScript enabled to view it.

  • The article discusses the important stages of the process of developing a digital device of microelectronics associated with testing and compiling models of digital blocks. The work was carried out as part of the creation of a domestic CAD system designed for the design of various digital microelectronics devices. The presented works were carried out by VSFEU together with ROSELECTRONICS Holding. The authors have developed a model of a digital microprocessor based on SYNTACORE's SCR1 core, a 32-bit fully functional RISC-V architecture model with an IMC instruction set. To simulate the RTL model, an XCELIUM simulator with a SimVision visualization shell from Cadence was used, which allows a complete analysis of the RTL model. The core model was compiled using the Genus software from the Cadence development package. Next, the model was configured and optimized according to the time parameters according to the specified restrictions on the microprocessor being developed. It is important to note that effective testing and compilation of digital block models requires the use of specialized tools, such as automated testing tools and version control systems. This makes it possible to significantly speed up the development process and improve the quality of the final product. As a result, a package of files for Innovus software was formed to create a topology.
  • Ключевыеслова— XCELIUM simulator, SimVision, RTL (Register Transfer Level), computer-aided design system (CAD), Cadence, System Verilog, Tool Command Language (TCL).

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  • С. 30-41.

DOI: 10.12737/2219-0767-2023-16-3-42-54

K.A. Kireeva1, L.A. Korobova1, D.V. Arapov1

Development of an artificial neural network for ECG classification
  • 1Voronezh State University of Engineering Technologies, This email address is being protected from spambots. You need JavaScript enabled to view it.

  • The paper presents a solution to the problem of developing an artificial neural network for classifying electrocardiograms in order to identify a patient's cardiovascular diseases. A literary review of the use of artificial neural networks for use in medicine in the determination of various cardiac pathologies in the condition of patients has been carried out. The most significant six parameters of the heart rhythm have been determined, which can be used in neural network modeling of the state of the human cardiovascular system. An analysis of the capabilities of well-known commercial programs for the classification of electrocardiograms was carried out, their advantages and disadvantages were identified. The capabilities of modern devices for taking cardiograms are described with an indication of the accuracy of their measurements. A study of three different structures of the desired neural network was carried out and the best option was chosen. The software package is made in Python in the Pycharm 2023.1 environment. The network was trained on the basis of the error backpropagation algorithm, the Adam method served as an optimizer. The standard deviation of the network output signal from the standard was used as a criterion. The Softmax function used in the output layer is used to convert the output of neurons into probabilities. Thus, a neural mathematical model for detecting heart diseases has been developed, which has low system requirements for a computer, which can be used to develop software for wearable electronics. An artificial neural network has the following metric: accuracy - 90%, sensitivity - 90%, specificity - 10%.
  • Ключевые слова — Artificial intelligence, neural networks, machine learning, ANN learning methods, ECG classification ANN, cardiovascular diseases.

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  • С. 42-54.

DOI: 10.12737/2219-0767-2023-16-3-54-62

S.A. Sazonova1, S.N. Korablin1, N.V. Akamsina1

Development of a mathematical model for the analysis of the undisturbed state of a thermal power hydraulic system
  • 1Voronezh State Technical University, This email address is being protected from spambots. You need JavaScript enabled to view it., This email address is being protected from spambots. You need JavaScript enabled to view it., This email address is being protected from spambots. You need JavaScript enabled to view it.

  • The sequence of development of a model for analyzing the undisturbed state of a thermal power hydraulic system - a heat supply system, which is an important stage in the design and optimization of the system, is considered. The main parameters of the system are analyzed, such as thermal loads, heat flows, heat transfer through pipes and heat exchangers, location and characteristics of equipment (boilers, pumps, etc.). A mathematical model of the system has been developed, which should take into account all the main factors affecting heat transfer and the efficiency of the system. The model is presented in the form of a system of equations and includes parameters such as temperature, pressure, coolant flow, etc. Based on this model, it is possible to analyze various operating modes of the system, optimize parameters and make decisions to improve it. When developing the model, the possibility of various disturbances was taken into account. To analyze the unperturbed state of the system, the influence of such disturbances is excluded and its basic operation is considered. When developing a flow distribution analysis model for a heat and power system, energy equivalence was used. The developed model for analyzing the undisturbed state of a thermal power system will make it possible to more accurately design and control such a hydraulic system, improve its efficiency and reliability.
  • Ключевые слова — Mathematical modeling, thermal power hydraulic system, heat supply system, undisturbed state of the system, flow distribution analysis, energy equalization, variational principle.

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    [15] Control of the formation of defects in brickwork of buildings / S. Sazonova, S. Nikolenko, S. Dorokhin, D. Sysoev // AIP Conference Proceedings. - 2022. - V. 2467- P. 020023. - DOI: 10.1063/5.0093524.

    [16] Weld defects and automation of methods for their detection / S.A. Sazonova, S.D. Nikolenko, A.A. Osipov [et al.] // IOP Conference Series. Krasnoyarsk Science and Technology City Hall. Krasnoyarsk, Russian Federation, 2021. - P. 22078. - DOI: 10.1088/1742-6596/1889/2/022078.

    [17] Evaluation of the effect of fermentation conditions on the functional and technological characteristics of the semifinished meat product / Yu.A. Safonova, A.V. Skrypnikov, E.N. Kovaleva [et al.] // IOP Conference Series: Earth and Environmental Science. International Conference on Production and Processing of Agricultural Raw Materials (P2ARM 2021). - 2022. - P. 012049. - DOI: 10.1088/1755-1315/1052/1/012049.

    [18] Example of integrating e-learning platforms with social network for create effective training courses / O.Y. Lavlinskaya, O.V. Kuripta, F.A. Desyatirikov [et al.] // Proceedings of the 2022 Conference of Russian Young Researchers in Electrical and Electronic Engineering, ElConRus 2022. - 2022. - Pp. 48-52. - DOI: 10.1109/ElConRus54750.2022.9755510.

    [19] Development of an operational quality management application for the production process / Yu.A. Safonova, A.V. Lemeshkin, A.N. Pegina, S.S. Rylev // AIP Conference Proceedings. Krasnoyarsk Scientific Centre of the Siberian Branch of the Russian Academy of Sciences. Melville, New York, United States of America. - 2021. - P. 70031. -DOI: 10.1063/5.0071375.

    [20] Study of the production process of extruded feed and evaluation of the quality of the resulting product using software methods / E.N. Kovaleva, Yu.A. Safonova, A.V. Lemeshkin [et al.] // IOP Conference Series: Earth and Environmental Science. International Conference on Production and Processing of Agricultural Raw Materials (P2ARM 2021). - 2022. - P. 012139. -. DOI: 10.1088/1755-1315/1052/1/012139.

    [21] Novikov, A.I. Grading of SCOTS pine seeds by the seed coat color: how to optimize the engineering parameters of the mobile optoelectronic device / A.I. Novikov, V.K. Zolnikov, T.P. Novikova // Inventions. - 2021. - V. 6, № 1. - P. 7. - DOI: 10.3390/inventions6010007.

    [22] Methods of assessing the effectiveness of reforestation based on the theory of fuzzy sets / A. Kuzminov, L. Sakharova, M. Stryukov, V.K. Zolnikov // IOP Conference Series: Earth and Environmental Science. "International Forestry Forum "Forest Ecosystems as Global Resource of the Biosphere: Calls, Threats, Solutions". - 2020. - P. 012007. - DOI: 10.1088/1755-1315/595/1/012007.

    [23] Sakharova, L. Methodology for assessing the sustainability of agricultural production, taking into account its economic efficiency / L. Sakharova, M. Stryukov, V.K. Zolnikov // IOP Conference Series: Earth and Environmental Science. International scientific and practical conference "Forest ecosystems as global resource of the biosphere: calls, threats, solutions" (Forestry-2019). - 2019. - P. 012019. - DOI: 10.1088/1755-1315/392/1/012019.

    [24] Belokurov, V.P. Modeling passenger transportation processes using vehicles of various forms of ownership / V.P. Belokurov, S.V. Belokurov, V.K. Zolnikov // Transportation Research Procedia. - 2018. - Pp. 44-49. - DOI: 10.1016/j.trpro.2018.12.041.

    [25] Formation of the predicted training parameters in the form of a discrete information stream / T.E. Smolentseva, V.I. Sumin, V.K. Zolnikov, V.V. Lavlinsky // Journal of Physics: Conference Series. - 2018. - P. 012045. - DOI: 10.1088/1742-6596/973/1/012045.

    [26] Methods of multi-criteria optimization in problems of simulation of trucking industry / S.V. Belokurov, V.P. Belokurov, V.K. Zolnikov, O.N. Cherkasov // Transportation Research Procedia. 12th International Conference "Organization and Traffic Safety Management in Large Cities", SPbOTSIC 2016. - 2017. - Pp. 47-52. - DOI: 10.1016/j.trpro.2017.01.010.

    [27] Strength test of the industrial building's load-bearing structures / S.A. Sazonova, S.D. Nikolenko, T.V. Zyazina [et al.] // Journal of Physics: Conference Series. ICMSIT-III 2022: Metrological Support of Innovative Technologies, 2022. - P. 022016. - DOI: 10.1088/1742-6596/2373/2/022016.

    [28] Behavior of dispersion-reinforced concrete under dynamic action / S.D. Nikolenko, S.A. Sazonova, V.F. Asminin [et al.] // Journal of Physics: Conference Series. ICMSIT-III 2022: Metrological Support of Innovative Technologies, 2022. - P. 022006. - DOI: 10.1088/1742-6596/2373/2/022006.

    [29] Condition monitoring of multi-apartment buildings / S. Sazonova, S. Nikolenko, E. Chernikov [et al.] // AIP Conference Proceedings. – 2022. - V. 2647. - P. 030018. - DOI: 10.1063/5.0104699.

    [30] Inspection of project documentation during the construction of an apartment building / S. Sazonova, S. Nikolenko, A. Meshcheryakova [et al.] // AIP Conference Proceedings. – 2022. - V. 2647. - P. 030019. - DOI: 10.1063/5.0104700.

    [31] Safonova, Y.A. Chickpea seeds germination rational parameters optimization / Y.A. Safonova, M.N. Ivliev, A.V. Lemeshkin // Journal of Physics: Conference Series. "International Conference Information Technologies in Business and Industry 2018 - Microprocessor Systems and Telecommunications". - 2018. - P. 032118. - DOI: 10.1088/1742-6596/1015/3/032118.

    [32] Assessment of the impact of composite mixtures on the quality of new meat products / Y.A. Safonova, E.E. Kurchaeva, A.V. Lemeshkin [et al.] // IOP Conference Series: Earth and Environmental Science. "International Conference on Production and Processing of Agricultural Raw Materials - Technology of Meat, Fish and Dairy Products". - 2021. - P. 032002. - DOI: 10.1088/1755-1315/640/3/032002.

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    [34] Verification methods for complex-functional blocks in CAD for chips deep submicron design standards / V. Zolnikov, K. Zolnikov, N. Ilina, K. Grabovy // E3S Web of Conferences. – 2023. – V. 376. - P. 01090.

    [35] Environmental impact consideration in the measures to improve the builders of different specialties working conditions / S.A. Sazonova, V.K. Zolnikov, K.V. Zolnikov [et al.] // E3S Web of Conferences. – 2023. – V. 389. – P. 02007. - DOI: 10.1051/e3sconf/202338902007.

  • С. 54-62.

DOI: 10.12737/2219-0767-2023-16-3-63-70

A.P. Suvorov1, A.V. Kuzovkin1

Computer modeling in the design of a combined tool for shaping shaped surfaces
  • 1Voronezh State Technical University, This email address is being protected from spambots. You need JavaScript enabled to view it., This email address is being protected from spambots. You need JavaScript enabled to view it.

  • The article discusses issues related to the design of tools for shaping surfaces of complex shapes, characteristic of modern engineering production. Often, designers take the path of increasing the degree of curvature of the surfaces of parts in order to improve their strength, ergonomic and aesthetic properties. The analysis carried out by the authors shows the presence of significant problems when processing such surfaces using traditional shaping methods. The authors state that in some cases it is advisable to use electrical non-contact methods for processing such surfaces. In this regard, the article provides an analysis of the features of digital design of technological equipment using modern computer-aided design systems. The author's approach to the design and manufacture of an electrode-tool is proposed, taking into account its wear during operation for the formation of curved surfaces using electrical processing methods. The authors have disclosed a technique for digital modeling and setting tool parameters based on programmable dependencies associated both with the nature of the removal of a layer of material due to the influence of an electric field in the processing zone, and with the features of manufacturing the tool using additive technologies with subsequent metallization of the working surfaces of the tool.
  • Ключевые слова — Electrophysical-chemical processing, shaped surfaces, combined tools, computer modeling, computer-aided design systems.

  • [1] Spravochnik po elektrohimicheskim i elektrofizicheskim metodam obrabotki [Handbook of electrochemical and electrophysical processing methods] / G. L. Amitan, I. A. Baysupov, Yu. M. Baron [i dr.]. – L. : Mashinostroenie, 1988. – 719 s.

    [2] Elektrofizicheskie i elektrohimicheskie metody obrabotki materialov [Electrophysical and electrochemical methods of processing materials]. V 2-h t. T. 1. Obrabotka materialov s primeneniem instrumenta [Processing of materials using tools] ; pod red. Smolenceva V.P. – M. : Vysshaya shkola, 1983. – 456 s.

    [3] Smolencev, V.P. Sostoyanie i razvitie elektrofizicheskih, elektrohimicheskih i kombinirovannyh metodov obrabotki [State and development of electrophysical, electrochemical and combined processing methods] / V. P. Smolencev // Innovacii v mashinostroenii (InMash - 2021) : sbornik trudov HII Mezhdunarodnoy nauchno-prakticheskoy konferencii, posvyaschennoy pamyati doktora tehnicheskih nauk, professora Rahimyanova Harisa Magsumanovicha, Novosibirsk, 07–09 oktyabrya 2021 goda. – Novosibirsk, 2021. – S. 164-185.

    [4] Spravochnik tehnologa [Technologist’s Handbook] / A.G. Suslov, V.F. Bez'yazychnyy, B.M. Bazrov [i dr.]. – Moskva : Izdatel'stvo "Innovacionnoe mashinostroenie", 2019. – 800 s.

    [5] Osnovy avtomatizacii proizvodstvennyh processov v mashinostroenii [Fundamentals of automation of production processes in mechanical engineering] / O.N. Kirillov, V.P. Smolencev, S.S. Yuhnevich, A.Yu. Ryazancev. – Voronezh : Izdatel'sko-poligraficheskiy centr "Nauchnaya kniga", 2022. – 186 s.

    [6] Kuzovkin, A.V. Proektirovanie, izgotovlenie i primenenie kombinirovannogo instrumenta dlya formirovaniya krivolineynyh poverhnostey [Design, manufacture and application of a combined tool for the formation of curved surfaces] / A. V. Kuzovkin, A. P. Suvorov, Yu. S. Zolototrubova // Voronezhskiy nauchno-tehnicheskiy Vestnik. – 2021. – T. 2, № 2(36). – S. 35-41.

    [7] Vas'kov, A.I. Poverhnosti klassa «A» v usloviyah melkoseriynogo proizvodstva [Class “A” surfaces in small-scale production] / A.I. Vas'kov, N.A. Gilev // Problemy kachestva graficheskoy podgotovki studentov v tehnicheskom vuze: tradicii i innovacii : sbornik materialov 7 mezhdunarodnoy nauchno-prakticheskoy konferencii. – Perm', 2017. – S. 447-452.

    [8] Rushan, A.Z. O nekotoryh klassah ploskih krivyh c monotonnoy funkciey krivizny, ih esteticheskoy ocenke i prilozheniyah v promyshlennom dizayne [On some classes of plane curves with a monotonic curvature function, their aesthetic assessment and applications in industrial design] / A.Z. Rushan, I.N. Rifkat, T.M. Kendzhiro // Vestnik Moskovskogo aviacionnogo instituta. – 2013. – T. 20, № 2. – S. 209-218.

    [9] Gosteva, K.V. Oblachnye tehnologii v mashinostroenii [Cloud technologies in mechanical engineering] / K.V. Gosteva, E.V. Smolencev // Sovremennye tehnologii proizvodstva v mashinostroenii : sbornik nauchnyh trudov. – Voronezh, 2017. – Vyp. 11. – S. 64-67.

    [10] Bulenkov, E.A. Primenenie oblachnyh tehnologiy pri proektirovanii tehnologiy izgotovleniya detaley ugol'nogo mashinostroeniya [Application of cloud technologies in the design of manufacturing technologies for coal engineering parts] / E.A. Bulenkov, M.K. Kuznecov, T.A. Gaze // Innovacionnye perspektivy Donbassa : sbornik materialov 7-y Mezhdunarodnoy nauchno-prakticheskoy konferencii, Doneck, 24–26 maya 2021 goda.– Doneck: Doneckiy nacional'nyy tehnicheskiy universitet, 2021. – T. 3. – S. 104-106.

    [11] Golov, R.S. Perspektivy vnedreniya oblachnyh tehnologiy v kontekste cifrovoy transformacii mashinostroitel'nyh predpriyatiy [Prospects for the implementation of cloud technologies in the context of digital transformation of machine-building enterprises] / R.S. Golov, V.V. Myl'nik // STIN. – 2022. – № 2. – S. 36-38.

    [12] Aleshina, A.E. Novyy podhod k avtomatizacii proektirovaniya sredstv tehnologicheskogo osnascheniya dlya elektricheskih metodov obrabotki [A new approach to automating the design of technological equipment for electrical processing methods] / A.E. Aleshina, A.V. Kuzovkin, A.P. Suvorov // Voronezhskiy nauchno-tehnicheskiy Vestnik. – 2022. – T. 4, № 4(42). – S. 37-44.

    [13] Suvorov, A.P. Issledovanie processa izgotovleniya kombinirovannogo elektroda-instrumenta dlya elektrohimicheskoy obrabotki v usloviyah edinichnogo i opytnogo proizvodstva [Study of the manufacturing process of a combined electrode-tool for electrochemical processing in conditions of single and pilot production] / A.P. Suvorov, A.V. Kuzovkin // Vestnik Voronezhskogo gosudarstvennogo tehnicheskogo universiteta. – 2019. – T. 15, № 5. – S. 117-121.

    [14] Suvorov, A. Parametrization and manufacturing of a combined electrode tool using additive technologies and modern Computer-Aided design systems / A. Suvorov // Journal of Physics: Conference Series. – 2019. – T. 1278. – P. 012031. – DOI: 10.1088/1742-6596/1278/1/012031.

    [15] Manufacturing a Combined Electrode-Instrument by the Method of Fast Prototyping / E. Smolentsev, D. Krokhin, V. Kuts, M. Razumov // Smart Innovation, Systems and Technologies. – 2022. – Vol. 247. – P. 185-195. - DOI: 10.1007/978-981-16-3844-2_20.

    [16] Krohin, D.E. Additivnye tehnologii izgotovleniya elektrodov-instrumentov [Additive technologies for manufacturing electrodes-tools] / D.E. Krohin, V.P. Smolencev, I.G. Starodubcev // Uprochnyayuschie tehnologii i pokrytiya. – 2022. – T. 18, № 6(210). – S. 276-282. – DOI: 10.36652/1813-1336-2022-18-6-276-282.

    [17] Additivnye tehnologii izgotovleniya instrumenta dlya kombinirovannyh metodov obrabotki [Additive technologies for manufacturing tools for combined processing methods] / V.P. Smolencev, N.N. Nenahov, A.A. Izvekov, I.G. Starodubcev // Naukoemkie tehnologii v mashinostroenii. – 2022. – № 7(133). – S. 3-8. – DOI: 10.30987/2223-4608-2022-1-7-3-8.

    [18] Norman, A. Additive Technology for Forming Channels with Galvanic-Mechanical Coatings / A. Norman, V. Smolentsev, I. Starodubtsev // Key Engineering Materials. – 2022. – Vol. 910 KEM. – P. 375-380. – DOI: 10.4028/p-dq0y3u.

    [19] Potashnikova, N.S. Additivnaya tehnologiya sozdaniya instrumenta dlya elektroabrazivnoy obrabotki [Additive technology for creating tools for electrical abrasive processing] / N.S. Potashnikova, V.P. Smolencev, M.G. Potashnikov // Uprochnyayuschie tehnologii i pokrytiya. – 2021. – T. 17, № 3(195). – S. 138-144.

    [20] Manufacturing a Combined Electrode-Instrument by the Method of Fast Prototyping [Manufacturing a Combined Electrode-Instrument by the Method of Fast Prototyping] / E. Smolentsev, D. Krokhin, V. Kuts, M. Razumov // Smart Innovation, Systems and Technologies. – 2022. – Vol. 247. – P. 185-195. – DOI: 10.1007/978-981-16-3844-2_20.

  • С. 63-70.

DOI: 10.12737/2219-0767-2023-16-3-70-78

V.I. Sumin1, A.S. Dubrovin1, S.V. Rodin2, V.K. Zolnikov3

Development of a mathematical model for optimizing the process of training cadets of law enforcement agencies in higher educational institutions as a complex system
  • 1Voronezh Institute of the Federal Penitentiary Service of Russia, This email address is being protected from spambots. You need JavaScript enabled to view it., This email address is being protected from spambots. You need JavaScript enabled to view it.

    2Voronezh Institute of the Ministry of Internal Affairs of Russia, This email address is being protected from spambots. You need JavaScript enabled to view it.

    3Voronezh State University of Forestry and Technologies named after G.F. Morozov, This email address is being protected from spambots. You need JavaScript enabled to view it.

  • This article discusses the problem of developing a mathematical model to describe the process of training cadets of law enforcement agencies in higher educational institutions, which are a complex system. Currently, reality places high demands on the qualifications and personal qualities of law enforcement officers, which in turn requires the relevant educational organizations to carry out advanced professional training of specialists. The functioning of higher educational institutions of law enforcement agencies is influenced by objective and subjective factors. To this end, in order to increase the efficiency of managerial decision-making in the process of training cadets of law enforcement agencies in higher educational institutions, it is proposed to use a mathematical model of training and education of a group of cadets, developed on the basis of the method of operations research, specifically the theory of Markov random processes that occur during continuously changing time and use discrete states of the system. The mathematical model of training and education of a group of cadets in its functioning uses streams of events that have the properties of stationarity and ordinariness. The process of transition from one state to another is described in the form of a marked graph of states with a transition probability density. Setting the intensity of the event flows will allow you to find the limiting probabilities and predict the states in which the study group is located. This approach will reduce the level of subjectivity of university staff and will allow structuring and optimizing the process of assessing the level of knowledge of cadets.
  • Ключевые слова — Complex organizational systems, management decision-making, operations research method, Markov process theory, exponential distribution law, Kolmogorov equations.

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    [7] Sumin, V.I. Razrabotka modeley i algoritmov informacionnyh struktur i processov ob'ektov osoboy vazhnosti [Development of models and algorithms of information structures and processes of objects of special importance] / V.I. Sumin, D.Yu. Churakov, E.G. Car'kova // Promyshlennye ASU i kontrollery. – 2019. – № 4. – S. 30-39.

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    [9] Rodin S.V. Modelirovanie sistem zaschity informacii v informacionnyh sistemah vnevedomstvennoy ohrany [Modeling of information security systems in information systems of private security] : special'nost' 05.13.18 – Matematicheskoe modelirovanie, chislennye metody i kompleksy programm, 05.13.19 – Metody i sistemy zaschity informacii, informacionnaya bezopasnost': avtoref. dis. … kand. tehn. nauk / Rodin Sergey Vladimirovich. – Voronezh, 2009. – 17 s.

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DOI: 10.12737/2219-0767-2023-16-3-79-86

D.V. Shekhovtsev1, A.M. Plotnikov1, K.V. Zolnikov2, A.I. Zarevich2

Technology of RTL product description model development in the development of CAD soft-ware and analytical complex
  • 1The Volga Management Company of the Roselectronika Holding, This email address is being protected from spambots. You need JavaScript enabled to view it.

    2Voronezh State Forestry Engineering University named after G.F. Morozov, This email address is being protected from spambots. You need JavaScript enabled to view it.

  • The article is devoted to the development of a proprietary CAD system designed for the design of various digital microelectronics devices. The presented works were carried out by VSFEU in cooperation with ROSELECTRONICS Holding. Cadence software was used to simulate a digital microprocessor based on SYNTACORE's 32-bit SCR1 core with the implementation of the IMC instruction set. The synthesis of the RTL model for testing was carried out in automatic mode and included a stage of testing for synthesizability and a stage of direct synthesis. The synthesis was carried out on the basis of standard library elements of the selected technology for the 130 nm process of the HHGRACE factory. For the created model, a test of the connection list (netlist) was performed, while the logical model was replaced by a list of circuits. Then the calculation of the power consumed by the circuit was carried out. At the end of the development, various tests aimed at verifying the correctness of the RTL code were carried out for the ready-made model - tests for compliance with specificity, tests for edge cases (corner case testing), tests based on applied tasks and algorithmic testing (real code testing), as well as tests for pico-high performance and throughput of switches and interfaces.
  • Ключевыеслова— RTL (Register Transfer Level), computer-aided design (CAD) system, Cadence, System Verilog, product description model

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    [2] Razrabotka proektnoy sredy i ocenka tehnologichnosti proizvodstva mikroshemy s uchetom stoykosti k special'nym faktoram na primere SBIS 1867C6F [Development of a design environment and assessment of the manufacturability of microcircuit production, taking into account resistance to special factors using the example of VLSI 1867TS6F] / V.A. Sklyar, V.A. Smerek, K.V. Zol'nikov [i dr.] // Modelirovanie sistem i processov. – 2020. – T. 13, № 1. – S. 77-82. – DOI: 10.12737/2219-0767-2020-13-1-77-82. .

    [3] Krotkova, N.A. Programmiruemye logicheskie integral'nye shemy (PLIS) [Programmable logic integrated circuits (FPGAs)] / N.A. Krotkova //Nauchnyy al'manah. – 2020. – №. 9-2. – S. 37-39. .

    [4] Metody shemotehnicheskogo modelirovaniya KMOP SBIS s uchetom radiacii [Methods of circuit modeling of CMOS VLSI taking into account radiation] / K.V. Zol'nikov [i dr.] // Voprosy atomnoy nauki i tehniki. Seriya: Fizika radiacionnogo vozdeystviya na radioelektronnuyu apparaturu. – 2014. – № 2. – S. 5-9. .

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    [6] Kamkin, A.S. Poisk konfliktov dostupa k dannym v HDL-opisaniyah [Search for data access conflicts in HDL descriptions] / A.S. Kamkin, M.S. Lebedev, S.A. Smolov // Trudy Instituta sistemnogo programmirovaniya RAN. – 2019. – T. 31, № 3. – S. 135-144. – DOI: 10.15514/ISPRAS-2019-31(3)-11. .

    [7] Ivanov, A.A. Programmno-analiticheskiy kompleks SAPR dlya razrabotki elektronnyh ustroystv [CAD software and analytical complex for the development of electronic devices] / A.A. Ivanov, V.B. Petrov // Elektronika i svyaz'. – 2017. – №2(56). – C. 45-52. .

    [8] Ushenina, I.V. Sovremennye napravleniya razvitiya PLIS arhitektury FPGA [Modern directions of development of FPGA architecture FPGA] / I.V. Ushenina //XXI vek: itogi proshlogo i problemy nastoyaschego plyus. – 2017. – №. 4. – S. 120-124. .

    [9] Gavrilov, S.V. Reshenie zadach trassirovki mezhsoedineniy s resintezom dlya rekonfiguriruemyh sistem na kristalle [Solving interconnection routing problems with resynthesis for reconfigurable systems on a chip] / S.V. Gavrilov, D.A. Zheleznikov, V.M. Hvatov // Izvestiya vysshih uchebnyh zavedeniy. Elektronika. – 2017. – T. 22, №. 3. – S. 266-275. .

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  • С. 79-86.

DOI: 10.12737/2219-0767-2023-16-3-86-93

D.V. Shekhovtsev1, S.V. Stoyanov1, T.V. Skvortsova2, O.V. Oxyuta2

Design route and testing of RTL analog blocks of the CAD software and analytical complex
  • 1The Volga Management Company of the Roselectronika Holding, This email address is being protected from spambots. You need JavaScript enabled to view it.

    2Voronezh State Forestry Engineering University named after G.F. Morozov, This email address is being protected from spambots. You need JavaScript enabled to view it.

  • The article discusses the stages of development of domestic CAD designed for the design of various digital devices of microelectronics. The presented works were carried out by VGLTU together with ROSELECTRONICS Holding. An important process in the development of CAD is the design of analog RTL (Register Transfer Level) blocks that determine the logic of the device functioning at a low level. This development needs to build a design route and test RTL blocks, for the practical implementation of which the programming languages of the Verilog and SystemVerilog microcontrollers were used. At the beginning, the CAD testing route is described in detail with a detailed description of its stages. Then the cells of functional SF blocks were generated, and the algorithm of its generation was given. The distinctive features of the conducted analysis is the ability to conduct testing for analog blocks. At the end, various testing methods were used, including functional testing, performance testing at various loads and verification of compliance with specifications. Also, the simulation of the operation of the units at different operating frequencies and with changing parameters was carried out. In conclusion, we described the process of installing CAD on the developer's workstation, which is necessary for the correct use of the PCB in the Cadence environment.
  • Ключевыеслова— Route of designing analog blocks, RTL (Register Transfer Level), computer-aided design system (CAD), Cadence, System Verilog, product description model.

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    [2] Osobennosti proektirovaniya mikroshem, vypolnennyh po gluboko-submikronnym tehnologiyam [Features of the design of microcircuits made using deep-submicron technologies] / A.V. Achkasov [i dr.] // Modelirovanie sistem i processov. – 2022. – T. 15, № 4. – S. 7-17. – DOI: 10.12737/2219-0767-2022-15-4-7-17.

    [3] Sravnenie instrumentov vysokourovnevogo sinteza i konstruirovaniya cifrovoy apparatury [Comparison of tools for high-level synthesis and design of digital equipment] / A.S. Kamkin [i dr.] // Trudy Instituta sistemnogo programmirovaniya RAN. – 2022. – T. 34, №5. – S. 7-22. –DOI: 10.15514/ISPRAS-2022-34(5)-1.

    [4] Kamkin, A.S. Poisk konfliktov dostupa k dannym v HDL-opisaniyah [Search for data access conflicts in HDL descriptions] / A.S. Kamkin, M.S. Lebedev, S.A. Smolov // Trudy Instituta sistemnogo programmirovaniya RAN. – 2019. – T. 31, № 3. – S. 135-144. – DOI: 10.15514/ISPRAS-2019-31(3)-11.

    [5] The performance and energy efficiency potential of FPGAs in scientific computing / T. Nguyen [et al.] // 2020 IEEE/ACM Performance Modeling, Benchmarking and Simulation of High Performance Computer Systems (PMBS). – IEEE, 2020. – Pp. 8-19.

    [6] Corperation A. Cyclone IV FPGA Device Family Overview // Cyclone IV Device Handbook. – 2013. – Т. 1

    [7] Vtr 8: High-performance cad and customizable FPGA architecture modelling / K.E. Murray [et al.] // ACM Transactions on Reconfigurable Technology and Systems (TRETS). – 2020. – Т. 13, №. 2. – С. 1-55.

    [8] Kalms, L. HiFlipVX: an Open Source High-Level Synthesis FPGA Library for Image Processing / L. Kalms, A. Podlubne, D. Göhringer // Lecture Notes in Computer Science. – 2019. - Vol. 11444. - Pp. 149-164.

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    [11] Design and research of the behavioral model for the modular reduction device / Y.Zh. Aitkhozhayeva [et al.] // Eurasian Physical Technical Journal. – 2020. – Vol. 17. – Pp. 151-156. – DOI: 10.31489/2020No1/151-156.

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ФИЗИКО-МАТЕМАТИЧЕСКИЕНАУКИ

DOI: 10.12737/2219-0767-2023-16-3-94-104

E.V. Raetskaya1

Algorithm for constructing a polynomial solution of a program control problem for a dynamic system in partial derivatives
  • 1Voronezh State University of Forestry and Technologies named after G.F. Morozov, This email address is being protected from spambots. You need JavaScript enabled to view it.

  • The completely controlled dynamic system in partial derivatives is considered. The problem of constructing state and control functions in an analytical form is solved. The basic method is the cascade decomposition method, which is algorithmically implemented in three stages: forward cascade decomposition, central stage and reverse. The method is based on the properties of the matrix coefficient at the derivative of the control function. Decomposition means a p-step transition from the original system to a reduced system that is quite similar in form to the original one, but with respect to functions from subspaces. The given conditions are reduced in the process of decomposition. When passing to the p-th step system, additional conditions appear on the partial derivatives of the components of the state function. The number of extra conditions at each point is equal to the number of decomposition steps. The matrix coefficient at the derivative of the control function of the reduced system of the last step is surjective. It is this property that determines the presence of the property of complete controllability of the system under consideration. The first stage of decomposition - the stage of the direct move ends with the detection of the number of decomposition steps and the identification of the property of complete controllability. The task of the central stage of decomposition is to construct the state function of the reduced system of the last step in an analytical form. The state function of the reduced system is the basis function that determines the form of the state function of the original system. Necessary and sufficient conditions for the existence of a basis function in polynomial form are established. The minimum degree of the polynomial is also set, which is determined by the number of decomposition steps. Formulas for constructing vector functions - coefficients of the basis function polynomial are given. Formulas for constructing the control function of the reduced system are given in polynomial form. During the last stage of decomposition, the state function of the original system is successively restored in polynomial form. This polynomial function satisfies the given conditions at the start and end points. The final stage is the construction of the control function of the original system in polynomial form as well. While the last stage of decomposition the state function of the original system is successively restored in polynomial form. This polynomial function satisfies the given conditions at the start and end points. The final stage is the construction of the control function of the original system also in polynomial form. A step-by-step algorithm for solving the program control problem for a dynamic system in partial derivatives has been developed. Formulas for constructing state and control functions in polynomial form are given. An example of a three-dimensional dynamical partial differential system with a surjective matrix coefficient in the first-step splitting system is given. The implementation of the proposed algorithm is demonstrated. The state and control functions are constructed in the form of a polynomial of minimum degree.
  • Ключевые слова — Partial derivative system, complete controllability, algorithm, cascade decomposition, state, polynomial solution, program control.

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    [32] Zubova, S.P. Issledovanie resheniya zadachi Koshi dlya deskriptornogo uravneniya s vozmuscheniem v pravoy chasti [Study of the solution to the Cauchy problem for a descriptor equation with a perturbation on the right side] / S.P. Zubova, E. V. Raeckaya // Itogi nauki i tehniki. Sovremennaya matematika i ee prilozheniya. Tematicheskie obzory. – 2021. – T. 195.– S. 51-56.

  • С. 94-104.

DOI: 10.12737/2219-0767-2023-16-3-105-114

I.V. Sapronov1

Volterra integral equation in Banach space
  • 1Voronezh State University of Forestry and Technologies named after G.F. Morozov, This email address is being protected from spambots. You need JavaScript enabled to view it.

  • Despite the significant results achieved in the study of operator equations (including Volterra equations) in normalized Banach spaces, fundamental research in this field of mathematics attracts the attention of a huge number of mathematicians around the world. The solutions of the Volterra equation describe many important processes in various fields of science and technology. Studies of various inverse problems, experimental or experimental data processing problems related to the study of spherical or axisymmetric plasma formations, numerous mathematical models of the existence of various biological systems lead to the consideration and solution of this type of integral equations. A great contribution to the development of this theory was made by N.A. Magnitsky, L.I. Panov, A.N. Tikhonov, M.M. Lavrentiev and others. Fundamental results were obtained in the study of multiple operator equations with singularities in various functional spaces. Solutions depending on many parameters were constructed for the above equations. Currently, such problems are considered in spaces of arbitrary dimension and with coefficients having a derivative of finite order. In this paper, a finite set of solutions in a certain functional space is constructed for an integral equation of the first kind. The kernel of the integral operator has a finite order and is sufficiently differentiable near zero. The integral equation under consideration is reduced to an integro-differential equation representing two terms. For the first term, it is possible to solve the corresponding inhomogeneous equation and obtain a set of solutions in some functional normalized space. For the second term, we obtain an equation with an operator whose norm in some operator space is arbitrarily small near zero. Such splitting of the integral operator makes it possible to construct a partial and general solution of the corresponding integro-differential equation in the form of convergent equations. Applying modern methods of functional analysis, it is possible, by studying two separate equations, to construct a multiparametric family of solutions with values in some banach space with weight for the original equation under consideration.
  • Ключевые слова — Resolving operator, operator spectrum, norm, kernel, Banach space.

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  • С. 105-114.

DOI: 10.12737/2219-0767-2023-16-3-114-128

А.А. Khvostov1, А.А. Zhuravlev2, Е.А. Shipilova2, А.А. Boger1

Calculation of local resistance coefficient at isothermal flow of non-Newtonian non-compressible liquid in cylindrical channel with sudden narrowing
  • 1Voronezh State Technical University, Voronezh, This email address is being protected from spambots. You need JavaScript enabled to view it.

    2Military Educational and Scientific Centre of the Air Force N.E. Zhukovsky and Y.A. Gagarin Air Force Academy, Voronezh, This email address is being protected from spambots. You need JavaScript enabled to view it.

  • The engineering calculation and construction of the extrusion tool in the form of cylindrical forming channels with sudden narrowing is associated with the determination of the coefficient of resistance of sudden narrowing and local pressure losses. The available theoretical and experimental data on the values of the resistance coefficient of sudden narrowing are contradictory, approximate in nature and, in some cases, do not take into account the rheological properties of the liquid. Their use to calculate local pressure losses under laminar flow conditions leads to significant errors. To eliminate the indicated problems, a mathematical statement of the problem of isothermal stationary laminar flow of non-Newtonian non-compressible fluid in an axisymmetric channel with sudden narrowing was formulated. The mathematical model of flow in spatial formulation is formalized in the form of equations for preserving momentum and mass. As a rheological model, the Carreau model is taken, taking into account the presence of finite viscosity values at marginal shear rates. The numerical solution of the problem was performed by the finite element method using the Comsol MultiphysicsTM CFD modeling package. As a result of the solution, the picture of the current of the non-Newtonian medium was restored in the form of the distribution of current lines, kinematic and dynamic flow parameters. The impact of Reynolds number on change of geometric characteristics of flow structure, kinematic and dynamic flow parameters was evaluated. Values of local resistance coefficient and pressure losses for overcoming sudden narrowing for selected flow modes are calculated. The results of computational experiments are summarized in the form of a criterion ratio for calculating the coefficient of local resistances depending on the Reynolds number.
  • Ключевые слова — Sudden narrowing, non-Newtonian fluid, Carreau model, Ostwald-de Ville equation, local resistance coefficient, Reynolds number, regularization, pressure loss.

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