bluuebunny/crossref_metadata_2025_split huggingface dataset:
Intelligent control systems using algorithms of the entropie potential method
Authors: Jumaev O A , Nazarov J T , Makhmudov G B , Ismoilov M T , Shermuradova M F 
Published: November 2021

Abstract
As part of neural network systems, an artificial neural network can perform various functions like diagnostics of technological equipment, control of moving objects and technological processes, forecasting situations, as well as assessing the state and monitoring of technological processes.
Propagation conditions of 10 MHz signals along the paths between Rostov and Moscow
Authors: Ivanov I , Maltseva O , Nikitenko T 
Published: November 2021

Abstract
To determine the conditions for the propagation of HF signals through the ionosphere along various paths, there are several possibilities: (1) ionograms of vertical sounding, (2) ionograms of oblique sounding between transmission and receiver points, (3) receiving signals from transmitters of exact time at fixed frequencies (here ~10 MHz), (4) using ionospheric models. This paper presents the results of a comprehensive study that implements all these possibilities. They refer to the propagation of HF signals on reciprocal paths between Rostov and Moscow during the period of the lowest solar activity of cycle 24 (April-May 2020). It is shown that the maximum usable frequency (MUF) of propagation through the F2 layer of the ionosphere in the overwhelming majority of cases did not exceed 10 MHz both in the experiment and according to model calculations. The signals were propagated through the Es layer. If earlier it was shown that such a joint experiment allows revealing the presence of traveling ionospheric disturbances, the results of this work emphasize the role of the Es layer.
Toroidal free oscillations of a viscous liquid spherical shell with mixed boundary conditions
Authors: Vodinchar Gleb 
Published: November 2021

Abstract
The problem of toroidal eigenmodes of free oscillations of a viscous fluid spherical shell is solved under mixed boundary conditions. These conditions are a combination of free surface conditions and solid boundary conditions. Such an artificial combination is used sometimes in the numerical simulation of geodynamo problem. The scheme for calculating the eigenmodes is described. It is shown that the use of mixed conditions leads to the disappearance of the first eigenmode with the smallest eigenvalue. A possible reason for this is the physical incorrectness of the mixed boundary conditions.
Determination of the limiting state of bodies during separation in the case of the general plane problem
Authors: Matveeva A N , Matveev S V , Andreeva A A 
Published: November 2021

Abstract
The paper considers the general plane problem of determining the limiting state of bodies during separation. The conditions for reaching the limiting state are considered to depend on the average pressure and the direction of separation. The paper defines the characteristic equations for two cases of separation: equality of two principal stresses to the limiting value of separation and equality of one principal stress to the limiting value of separation. Equations of characteristics’ lines and relations along them are determined.
Nanoparticles in marine antifouling coatings: a case study
Authors: Mosunov A A , Evstigneev V P 
Published: November 2021

Abstract
The problem of fouling of hydraulic structures, marine structures, ships and vessels has been acute since the beginning of the era of navigation. The formation of a biofilm of fouling reduces the speed of the vessel, worsens its controllability, increases fuel consumption, shortens the service life of hydraulic structures and increases the load on them. Many methods have been proposed to control fouling. One of the most promising coatings is considered to be based on the use of nanoparticles of biologically active metals and their oxides. The paper discusses various strategies for using nanoparticles to combat biofouling. The paper also presents preliminary results of a study of the antifouling efficiency of coatings modified with nanoparticles of metal oxides Fe-ZnO, ZnO, CuO. The study was carried out by exposing plates with experimental compositions at the sea test site in the Sevastopol Bay for a year, starting from August 2020. The species composition of a separate group of microperiphyton - microalgae - on plates with experimental coatings in the first two months of exposure, as well as the result of photographic fixation of the state of the surface of the plates from the point of view of macro-fouling, was investigated.
Applied spectroscopy methods application in the defluorinated phosphate production technological process control problem
Authors: Vaganov M A , Kazakov V I , Lebedev V F , Bestugin A R , Kitaev V V 
Published: November 2021

Abstract
The paper considers the applied optical spectroscopy methods application in the defluorinated phosphate production, controlling the technological process task. The emission spectral analysis using the method possibilities to control the charge hydrothermal acid processing process, which takes place in special furnaces with natural gas burning and a temperature of 1340 – 1400°C, have been studied. Experiments have been carried out in production conditions, and the radiation spectral characteristics study results from the furnace during the defluorination technological process are presented. It is shown that, by measuring individual spectral lines, it is possible to provide an automatic control mode for the defluorination technological process in the furnace burner controlling the combustion mode terms without the need for visual observation by the operator to ensure a better product yield. The work second part is devoted to the defluorinated phosphate chemical composition study by the laser-spark emission spectrometry method (LIBS). The LIBS method application for the defluorinated phosphate chemical composition analysis is proposed, which allows the production process parameters real-time control. The plasma spectra measurement and interpretation results from the ready-made defluorinated phosphate sample, obtained using the LIBS method, are presented.
Ab initio calculation of the electronic structure of a solid solution of strontium-bismuth molybdat
Authors: Sokolenko E V , Buyanova E S , Mikhaylovskaya Z A , Slusarev G V 
Published: November 2021

Abstract
Scheelite-like compounds based on SrMoO4 have been studied. Based on X–ray structural data, models of Sr1-3xBi2xMoO4 structures (x=0.2125) are constructed, at x≧0.175, a superstructural ordering is observed associated with the location of cationic vacancies. From the first principles, calculations of the density of states in the vicinity of the forbidden zone are performed. The calculated values of the band gap width were compared with the values obtained from the reflection spectra.
Digital demodulators for analog signals: comparative analysis and simulation
Authors: Kudinova T V , Osipov G A , Nanay F A 
Published: November 2021

Abstract
The paper examines digital demodulators for two commonly used techniques of modulating analog signals: amplitude modulation (AM) and frequency modulation (FM). The described demodulators can be used to perform the radio monitoring of narrowband signal ranges including FM broadcasting stations as well as license-free CB, LPD, PMR bands. The demodulators considered in this work are intended for programmable devices with limited memory and computing resources, for example, for STM32F407 microcontrollers and similar ones. The paper presents the analysis and simulation of demodulators for AM signals, FM signals with low modulation indices and for FM signals without restriction on the modulation indices. In addition, the authors demonstrate how to demodulate the phase-modulation signal using a quadrature demodulator. The number of operations that are available for demodulation is limited by IF multiplication and filtering. The simulation of the analyzed demodulation algorithms was carried out in the Scilab environment which is a free analogue of the Matlab environment. To explain the principle of operation of demodulators, block diagrams and graphs of signals in time and frequency domains are shown.
Mathematical modeling of technological process in formalin production
Authors: Botirov T V , Latipov Sh B , Buranov B M 
Published: November 2021

Abstract
Methods and algorithms of the sustainable synthesis of adaptive control systems for the technological process of formalin production have been proposed in this article. Parameters of the regulator are estimated in the developed adaptive control system, i.e. the purpose of adaptation is reduced to the estimation of coefficients of the regulator providing the specified behavior of the system. The results obtained and the analysis of transition processes based on the modeling of the control system showed that with adaptive control, mass fractions of formaldehyde and methanol in formalin are held within 36.5÷37.5% and 0.7÷0.9% respectively, while the specific consumption of the methanol decreases by 3÷4%, which allows the process in mode close to the optimal.
The gaseous hydrocarbon fuel combustion process diagnostics using laser-spark emission spectrometry
Authors: Vaganov M A , Kazakov V I 
Published: November 2021

Abstract
To solve the gaseous hydrocarbon fuel combustion process control and diagnostics problem, it is proposed to apply the laser-spark emission spectrometry methods. In propane-air mixture combustion, three modes are investigated: stoichiometric combustion, an enriched mixture, and a lean mixture. A laboratory stand has been developed to study combustion processes by laser-spark emission spectrometry. The plasma radiation spectral characteristics an experimental study results formed in a flame when exposed to laser radiation are presented.
Diffraction gratings analysis used in lensless camera technology
Authors: Marchuk V I , Samara I , Okorochkov A I , Yeghizaryan K A 
Published: November 2021

Abstract
We give diffraction gratings an analysis in the lensless camera’s construction, the reasons for their use in image processing, their use and the problems main positive factors associated with their consideration in the lensless camera’s construction. The diffraction gratings most common types examples that are currently used in the lens-free camera’s construction are given, their classification and approximate structure with giving their transfer functions mathematical description is given, and their use practical examples in solving various problems associated with image processing are considered. The various diffraction gratings basic advantages and lacks consideration analysis at lensless cameras construction and their use reasons are performed. Also, the questions connected with their further development at image processing construction and use in problems are considered.
Theoretical substantiation of optimum energy efficiency of ultrasonic wet dispersing
Authors: Golykh Roman N 
Published: November 2021

Abstract
The known preliminary experimental results of ultrasonic dispersing of suspension were presented and analyzed. The need for determination optimum modes providing maximum energy efficiency of ultrasonic wet dispersing is justified. The physical mechanism and the theoretical model of ultrasonic dispersing were proposed. The model allows to calculate fraction composition of dispersed particles and to evaluate, that the maximum of energy efficiency exists at fixed intensity for different materials of solid particles.
Some issues of solving inverse problems in optical systems with lensless cameras
Authors: Okorochkov A I , Marchuk V I , Samara I , Yeghizaryan K A 
Published: November 2021

Abstract
The inverse problems current state a general characteristic in optics is given, the approaches to their solution, their incorrect and unstable solutions cause are considered, and recommendations for these drawbacks elimination are given. General approaches to solving inverse problems in images reconstruction obtained in lensless cameras based on different masks are also considered, and their advantages and disadvantages in comparison with lensless lenses are pointed out, as well as their further research directions are indicated.
Nonlinear gyromagnetic transmission line design optimization for increasing radiopulse generation efficiency
Authors: Priputnev P V , Romanchenko I V , Maltsev S N , Mutilyn O O , Tarakanov V P 
Published: November 2021

Abstract
Using numerical simulation an optimization of gyromagnetic nonlinear transmission line design was carried out. The goal of simulation was to increase efficiency of video pulse into radiofrequency pulse transformation. Several factors significantly influencing the efficiency of generators were found. Experimental validation of some obtained results is also discussed.
Numerical calculation of intermolecular bonds under the action of ultrasonic cavitation
Authors: Golykh Roman N , Khmelev Vladimir N , Manyakhin Ivan A , Ilchenko Dmitry A , Minakov Vyacheslav D , Shakura Vladislav A 
Published: November 2021

Abstract
The linear model of macromolecules was proposed. Expression for probability of macromolecules breakup under ultrasonic cavitation action was obtained. The fractional composition and viscosity of uncured polymer were calculated. As a result of the calculations, it was evaluated that the cavitation-acoustic effect for a time of no more than 1 min at an vibration intensity of at least 6 W/cm2 and an initial viscosity of 0.2 Pa· s reduces the viscosity of polymers by at least 8 times. At the same time, it was theoretically revealed that the cavitation-acoustic effect is also capable of reducing the viscosity of polymers with an initial viscosity of more than 1 Pa·s up to 4 times.
Theoretical and experimental study of the effect of wollastonite on the physical and mechanical properties of concrete
Authors: Dobrosmyslov S S , Voronin A S , Fadeev Y V , Endzhievskaya I G , Khartov S V 
Published: November 2021

Abstract
As part of the work, an experimental and theoretical study of the effect of adding wollastonite on the physical and mechanical characteristics of concrete was carried out. The internal stress was calculated according to Hooke’s law. The change in the specific volume was determined from the change in the volume of the hydrated phase. The calculation of the chemical interaction was carried out within the framework of thermodynamic equilibrium. According to the results of the work, it was shown that the addition of wollastonite leads to a linear decrease in the value of internal stresses, which is consistent with experimental results on the increase in compressive and bending strength.
Issues of developing receiving equipment for the passive method of induced polarization
Authors: Belolipetskii P V , Shajdurov G Y , Potylitsyn V S , Romanov V V 
Published: November 2021

Abstract
The article deals with the design of receiving equipment for the passive method of induced polarization (IP). It is shown that the best option for recording this kind of signals is a circuit with an input analogue part and amplification of 50-100 times, as well as an input gain of at least 3 MΩ and a digital part based on a modern twenty-four-bit analogue-to-digital converter (ADC). In this case, it is preferable to use one ADC per channel without multiplexing, for better suppression of inter-channel interference. Signal processing is performed using modern microcontrollers based on the Cortex M4 core, and then the data is transmitted via Bluetooth to a laptop or tablet, where visualization and post-processing is carried out. Thus, the proposed scheme for the implementation of the receiving equipment meets all the requirements for the receiving equipment for the passive IP method, and can be introduced into the practice of field work.
Physical and technological approaches to systemic film moistening
Authors: Kovalev V , Testoyedov N A , Blinnikov A V , Voroshilova A A , Borovinsky D V 
Published: November 2021

Abstract
This article discusses the physical and technological approaches to systemic film moistening. The features of storage and operation of film in various conditions are considered. A number of features and facts are presented that affect the organization of both systemic humidification and the maintenance of long-term storage of film materials on analog media. The article presents the main factors that affect the quality of the working surface of 35 mm and 16 mm film: the specifics of the composition of the film; the effects of a temporary, natural and technological nature on motion pictures; sophisticated technology for servicing analog film projectors, rewinding devices and film checking facilities. The analysis of the sequence of manipulations of technological equipment and chemical compositions for stable operation without gusts, drying and burnout of film materials is carried out. The article gives the physicochemical content of work on the stages of film moistening, taking into account the specifics of the applied filmostatic liquids. In the step-by-step process of moistening, after the end of each stage, the main results obtained are assessed by visual comparison of the image projections, followed by the digitization of the image and the correction of the result obtained in graphic editors. To eliminate artifacts, scratches and other elements of entropy, the authors recommend using neural network approaches for working with film materials.
Promising directions of information technologies applications for improving of control and measuring devices in medical industry
Authors: Zolkin A L , Munister V D , Bogaevskaya O Yu , Yumashev A V , Kornetov A N 
Published: November 2021

Abstract
The article deals with the problems of functioning and improvement of measuring and control devices in the medical industry. The classification, principles of organization of specialized, multifunctional and single-functional medical instrument and computer systems are considered. A model for solving the problem of scalability and availability through the use of non-relational data management systems that combine methods for achieving atomicity and data consistency is proposed. The promising diagnostic methods in medicine are described. The importance of a prompt assessment of the patient’s condition is emphasized. The optimization and modernization of the digital radiography using modern machine learning algorithms are given and justified.
Conceptual foundations for the development of developing software systems using multivariate synthesis of design solutions
Authors: Ryndin N A , Aksenov I A 
Published: November 2021

Abstract
Considering software systems as developing, changing their structure and characteristics during the entire process of development, implementation and operation is an important task. The difficulties that arise in this case, associated with the large dimension of combinatorial problems that arise in the process of studying software systems, taking into account the dynamics of their development, it is advisable to overcome on the basis of using methods of multivariate synthesis, with the help of which a multi-stage approach to solving emerging problems is formed, including evaluating the effectiveness of the solution at each stage.
Method of attractor reconstruction in modeling the integral risk indicator
Authors: Bogdanova L M , Nagibin S Ya , Rabinovich O A 
Published: November 2021

Abstract
This study examines a mathematical model for forecasting the dynamics of changes in the industrial safety risk indicator of an enterprise. The results of the development of a method for reconstructing the attractor of the integral risk indicator based on the Grassberger-Prokacchia algorithm, which is currently the most popular for analyzing time series and allowing automating the process of calculating a parameter that determines the number of points, for making a forecast. There are results of estimating the forecast of the dynamics of the behavior for a strange attractor, obtained on the basis of real data.
Combined architecture of an intelligent agent using models
Authors: Tokarev V L , Sychugov A A 
Published: November 2021

Abstract
The article considers the problem of building a multi-agent system for solving information security problems of automated process control systems. The architecture of an intelligent agent is proposed and studied, the features of which are the presence of a set of models used both for assessing the security of a certain node of the security object – an automated system, and for making decisions aimed at increasing the level of security. The results obtained in the course of research improve both the scientific and methodological apparatus for integrating methods of multi-agent technologies, and expand the areas of its practical application.
Development of an automaton based on rigid logic to control the irrigation system
Authors: Kostarev S N , Sereda T G , Novikov A V , Kochinov Y A , Kochinova T V 
Published: November 2021

Abstract
Managing the distribution of water resources for the southern regions of Russia is of great importance in connection with limiting the consumption of fresh water. The use of saline water can lead to soil salinization and negatively affect crop production. The article deals with the problem of constructing a sequential automaton for controlling the system of switching networks when watering plants on the example of the sanatorium “Rus” in the city of Anapa, Krasnodar Territory. The Mediterranean zone, where the city of Anapa is located, is characterized by a low level of precipitation, which leads to the need for artificial irrigation of plants. The existing irrigation system using a water tank truck based on the GAZ-53 is physically outdated, which required the development of a modern automated system. The flower alleys, located on the territory of the sanatorium, were structured in a tree-like form. The construction of a control device based on rigid logic is based on the Mealy automaton. A method for constructing a control system for a tree-like water supply network has been developed, which makes it possible to control the main, distribution and supply branches. A block diagram of an irrigation machine has been developed, which has a tree-like branching, which shows control signals and states of transitions. Synthesized logical equations for the control of the water supply system, using a blocking control system with feedback. It is proposed to use the Omron programmable logic controller and CX-One software as software and hardware. The distribution of the address space of the controller is shown. Simulation modeling of the system operation was carried out, which showed the correct logic of control over the work of water pressure supply in water pipelines. Implementation of the developed system will improve the quality of irrigation of plants and minimize the cost of irrigation.
Setting up data exchange between information systems that automate accounting at the enterprise
Authors: Mishina S V , Kornienko D V 
Published: November 2021

Abstract
The developers of 1C offer a line of software products to automate the production processes of enterprises. 1C: ERP Enterprise Management and 1C: Salary and Personnel Management are the flagship solutions of 1C. In the course of the work, the difficulties that arise when it is necessary to synchronize data between the configurations of 1C: ERP Enterprise Management and 1C: Salary and Personnel Management have been analyzed. This article analyzes the functionality of the above products. An overview of the main elements underlying the mechanism for synchronizing information between 1C applied solutions is given. The process of data exchange and synchronization between the products 1C: ERP Enterprise Management and 1C: Salary and Personnel Management using the built-in tools of the 1C software platform is considered. The process of organizing interaction and data synchronization in the considered solutions is presented. Recommendations related to setting up and receiving synchronized objects are given. The analysis of the results is carried out, conclusions are drawn.