bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis of thin-film layers of electrochromic panels based on SnO2 and WO3 by aerosol pyrolysis
Authors: Zinchenko Timur , Pecherskaya Ekaterina , Gurin Sergey , Kozlov Gennady , Zhurina Angelina , Shepeleva Anastasia 
Published: December 2022

Abstract
Energy efficiency and energy saving are actively developing. One of the promising areas of optoelectronics is the improvement of electrochromic panels or smart glasses. Smart glasses are divided into electrochromic, thermochromic and photochromic. The devices incorporate thin-film structures that are transparent conductive oxide (TCO) and transition metal oxide (TMO). An urgent scientific task is a systematic comprehensive study of the parameters of specified thin films, as well as the improvement of methods for their synthesis to obtain coatings with specified properties. A promising and most suitable method for the synthesis of the above-listed coatings is the method of aerosol pyrolysis, which has a number of advantages: ease of implementation and the possibility of embedding into the finished technological process while maintaining the coating quality. The article analyzes the results of the study of the following coatings parameters: the efficiency of coloring; TMO response time; the TCO throughput and conductivity.
Detection of weathering effects and mineral additive content of LDPE composites using hyperspectral imaging
Authors: Metlenkin D A , Kiselev N V , Platov Y T , Tyubaeva P M , Boychenko E A , Burmistrov I N 
Published: December 2022

Abstract
The use of hyperspectral imaging and multivariate analysis to detect weathering effects and mineral additive content in LDPE composites is demonstrated. Principal component analysis of hyperspectral images was used to obtain models of composite gradation by additive content and presence of weathering effects. The analysis of the factor loading matrix of spectral wavelength reflectance coefficients revealed the most significant bands contributing to the gradation of composite samples by additive content and presence of weathering effects.
Modification of a metal surface with detonation diamond nanoparticles
Authors: Malikov Vladimir , Tihonskii Nikolay , Kozlova Victoria , Shevtsova Lilia , Ishkov Alexey 
Published: December 2022

Abstract
Friction between metal surfaces in various mechanisms is an actual problem in modern engineering. Friction causes wearing of the rubbing parts. For reducing the coefficient of friction, it is proposed to treat the surfaces of rubbing parts with a suspension having a high (more than 20%) content of ultradispersed detonation diamond (UDD). In the course of treatment, nanodiamond particles penetrate into the substance being treated and create a thin surface layer (up to 1000 nm, depending on the degree of part processing), which leads to smoothing the effect of microsliding, due to which the reduction of the friction coefficient. The resulting surface layer consists of a metal matrix with diamond nanoparticles embedded in it. The paper shows the study of the steel part surface with the use of the optical and X-ray methods, and provides information on the change in the coefficient of friction of steel parts.
Nonlocal model of velocity vibrations compressed fluid under conditions hydraulic impact
Authors: Stefanyuk E V , Gavrilova T E , Uglanov D A , Panova V A , Shimanov A A 
Published: December 2022

Abstract
Taking into account the relaxation properties of the fluid, a hyperbolic equation of motion is obtained that describes the change in velocity under conditions of nonlocal equilibrium, that is, taking into account the effect of unsteadiness of the flow on the magnitude of the friction force. Studies of its exact analytical solution have shown that taking into account the nonstationarity of tangential stresses leads to results that differ significantly from the solutions of the classical hyperbolic equation obtained by using the values of velocity, density, tangential stresses, and pressure averaged over the flow cross section (the hypothesis of quasi-stationarity). Comparison of the obtained solution with experimental data, as well as with the results of theoretical studies of other authors (I.A. Charny), obtained from the solution of the Navier - Stokes equations (equations for local quantities), showed their satisfactory agreement. Consequently, studies based on the theory of quasi-stationarity can be used only after comparing them with the results obtained taking into account the nonstationarity of tangential stresses (friction force) or with experimental data, that is, only after determining the range of the degree of nonstationarity in which it can be used.
Multilayer thin-film resistive structures with temperature self-compensation for super-precision resistors and strain gauges
Authors: Gurin Sergey , Pecherskaya Ekaterina , Novichkov Maksim , Safronova Olga 
Published: December 2022

Abstract
The paper presents the main structural and topological solutions, the technology of obtaining and stabilizing multilayer thin-film resistive and tensoresistive structures with temperature self-compensation, which allows achieving a TCR value of no more than ± 1 × 10−6 and an instability of resistance no more than ± (0.01 … 0.02) %.
Diagnosis of a periodic nanostructure with a defect using circularly polarized light
Authors: Yatsyshen V V 
Published: December 2022

Abstract
The paper considers the reflection of a circularly polarized light wave from a periodic nanostructure. The method of characteristic matrices was used to calculate the ellipsometric parameters ρ
0 and Δ of reflected light. It is shown that a wave initially polarized in the left circle changes polarization upon reflection, turning into an elliptically polarized wave. The results obtained for an ideal periodic medium are compared with the results of reflection from a periodic medium with a single defect - the upper layer of the original periodic medium is replaced by an absorbing dielectric layer. The analysis showed that the spectral dependences of the ellipsometric parameters for two structures, periodic and defective, differ significantly. In the range of wavelengths λ from 0.4 μm to 0.6 μm, the ellipsometric parameter ρ
0 for the considered periodic medium and the medium with a defect differ significantly from each other - where the maximum is for one medium, there is approximately the minimum for the other. In turn, the parameter Δ demonstrates a significant difference for the two structures in the wavelength range λ from 0.46 μm to 0.55 μm. The use of circularly polarized light demonstrates wide possibilities for studying defects in periodic nanostructures.
Methods for evaluating chaga extraction effectiveness based on its porosity change
Authors: Safin R R , Gainullin Renat H , Safina A V , Gainullin Rishat H 
Published: December 2022

Abstract
The article presents the results of experimental studies of changes in chaga physical parameters in course of aqueous extraction and a method for evaluating the efficiency of target components extraction based on changes in porosity for different zones of the fungus. Cutting-edge techniques and experimental plants were used in the research to determine the physical parameters of solid porous bodies: weight, volume, apparent volume, average density, apparent density, and porosity. It was found that four of the six physical parameters studied, i.e. weight, volume of the sample, apparent volume and average density had a negative change and two, namely apparent density and porosity, had a positive change. The percolation method was used to determine the quantitative yield of extractive substances for various zones of chaga. The largest values of parameter changes are typical for samples from the outer zone (sclerotium) and the fruit body, the smallest - for a sample from the inner layer of the chaga (the place adjacent to the tree trunk). This confirms the hypothesis of the greatest value of chaga elements related to the sclerotium and fruit body zones. A technique has been developed to determine the efficiency of the extraction process by the changes in chaga porosity. The dependence of the degree of extraction on changes in porosity for different layers of chaga has been established and mathematically described, which will allow for a comparative analysis of various extraction methods.
Physical and chemical processes of fuel change during ignition in diesel engine
Authors: Alatyrev S S , Kazakov Y F , Vasiliev A O , Maksimov I I , Pushkarenko N N , Likhanov V A , Anfilatov A A 
Published: December 2022

Abstract
The combustion of hydrocarbon fuels in the combustion chambers of diesel engines is preceded by processes of both physical and chemical transformations. The nature of the chemical transformations and their effect on the workflow are usually not taken into account. Meanwhile, their role in ensuring the efficiency of the workflow is very large. Chemical transformations in hydrocarbon fuels in combustion chambers cause the appearance of products capable of self-ignition under the influence of temperatures and pressures arising at the end of the compression stroke. The chain of these transformations ends with the formation of soot particles, the burning of which with abundant heat release in the form of radiant energy has a significant effect on the value of the indicator efficiency. The content and ways of influencing chemical transformations in fuel are considered, as well as the use of these transformations in increasing the combustion efficiency of fuels and increasing the indicator efficiency.
Relaxation of ultrasound in LuxMn1-xS
Authors: Sitnikov M N , Aplesnin S S , Uvaev I V , Mashkov P P , Pavlova A N 
Published: December 2022

Abstract
Relaxation phenomena are studied in LuxMn1-xS solid solution using ultrasound in the temperature range of 80-500 K. The relaxation time of the ultrasound attenuation coefficient and relaxation maximum are determined. The dependencies of the attenuation coefficient of ultrasound on frequency and intensity are found. The current induced by ultrasound is determined.
Anti-vortex device for stabilization of measuring parameters in apparatus for biofuel production
Authors: Bashmur K A , Shvetsov N S , Tynchenko V S , Pavlova P L , Kurashkin S O , Sergienko R B 
Published: December 2022

Abstract
The article deals with the problem of metrological support of innovative technologies, in particular, related to the production of promising renewable energy sources such as biofuels. In the process of biofuel separation, it is very important to monitor various technological parameters: pressure, flow, liquid level, temperature, etc. For this purpose, measuring devices are used as part of the automation of technological processes. At the same time, flow turbulence can have a significant impact on the accuracy of the readings of these devices. Often, the transition from laminar to turbulent flow is associated with the formation of a vortex when overcoming the flow of various constrictions at the outlet of the installations. The paper considers a method for preventing the formation of vortices through the use of a anti-vortex device (AVD). Computer modeling of the fluid flow in the SolidWorks software package was carried out in order to determine the optimal geometric characteristics of the AVD. In particular, the influence of the gap in the AVD and its plate diameter was studied.
Investigation of inertia and sensibility of net radiometer
Authors: Kuznetsov A D , Nikitina V S , Saenko A G , Simakina T E , Voskanyan K L 
Published: December 2022

Abstract
This paper presents a method for calculating the sensibility and inertia of net radiometer. The concept of lag coefficient of net radiometer is introduced. The effect of wind speed on the time course of the temperature difference between the plates of the net radiometer was investigated. It is presented that with the development of wind speed and sensibility, the lag coefficient of net radiometer decreases. The recommendations on the practical application of methods for automatically taking into account the inertia error of devices in production measurements are given.
Computational analysis of data transmission models in satellite systems for aircraft trajectory control
Authors: Testoyedov N A , Kovalev D I , Golovenkin E N , Voroshilova A A , Andronov A S , Borovinsky D V 
Published: December 2022

Abstract
The paper considers the application of the computational analysis of data transmission models in satellite systems for aircraft trajectory control. A system for monitoring the trajectory of aircraft using satellite communication systems Iridium and Inmarsat is presented. The scheme of communication between the aircraft board and the control tower takes into account the peculiarities of extreme conditions typical for the Arctic and the Far North. An example of calculating the probability of code combination transformations for an asymmetric channel with independent errors is considered. In this case, the calculations follow the provisions of the theorems of probability theory. Modeled data rates for satellite communication systems Iridium and Inmarsat. It is concluded that the Iridium and Inmarsat systems have a high data transfer rate and a low error rate, and their use as communication systems for transmitting data from an aircraft to an air traffic control center is justified.
A model of the stable functioning of the data collection, processing and protection system
Authors: Malafeyev Oleg , Redinskikh Nadezhda , Zaitseva Irina , Kolesov Dmitry , Smirnova Tatyana , Shlaev Dmitry 
Published: December 2022

Abstract
The system of data collection, processing and protection is considered. In such system data is transmitted via data channels from the data collection and processing blocks to the data protection block. The received data arrays are stored in the data protection block. The functioning termination one of the data collection blocks may lead to the loss of the received data. The problem of ensuring the stable functioning of the system for collecting, processing and protecting data is formalized and studied in this paper. It is also considered the case when the system has a data backup block. An illustrative numerical example is solved.
Mathematical model of intelligent decision support based on hierarchical logical constructions
Authors: Bolnokin V E , Sorokin S A , Mutin D I , Mutina E I , Storozhev S V , Storozhev V I , Yu Zaslavskaya O 
Published: December 2022

Abstract
The paper is devoted to the investigation of mathematical model of intelligent decision support based on a hierarchical logical construction. Hierarchical logical constructions and forecasting variables are described. The goal of hierarchical logical construction analysis is to get the most accurate forecast possible. Models and algorithms of an intelligent decision support system using a hierarchical logical construction are described.
Neural network modeling of flow hydrodynamics in packed bed reactors
Authors: Mukhametzyanova A G , Bronskaya V V , Bashkirov D V , Ignashina T V , Balzamov D S , Kharitonova O S 
Published: December 2022

Abstract
This paper presents the results of determination of the hydrodynamic characteristics of the packed bed reactor using an artificial neural network. Experimental and model values of the pressure drop are obtained, a graphical dependence of the hydraulic resistance of the packed bed on the fictitious gas velocity is constructed. In recent years, the processes of complex separation of gas and liquid mixtures have attracted considerable attention, both in academic research and in industrial applications, since they combine the advantages of flow recirculation and cost reduction by reducing equipment units. However, the design of separation processes, especially when it comes to the packed bed reactor, is still a difficult task for chemical engineers due to the difficulties associated with obtaining process models that can reliably describe the mutually influencing processes and phenomena, including simultaneous separation reactions, heat exchange in the conditions of the hydrodynamics of the packed bed reactor. The complex behavior of the process forced to look for a very reliable and powerful tool for modeling and simulating the dynamics of the packed bed reactor. Neural networks are one of the strategies proposed for solving such problems, since they can be trained to process and describe complex phenomena. This paper presents an approach using a neural network and the laws of physics with regression analysis. The efficiency and reliability of these method are proved by numerical experiment in comparison with experimental data taking into account various initial/boundary conditions. Thus, in this paper, neural networks are developed and modeled using Wolfram Mathematica to predict the resistance of the packed bed of the column.
Modulation and coding scheme in SCMA communication system
Authors: Pokamestov D A , Kryukov Ya V , Kanatbekuli I , Rogozhnikov E V , Abenov R R 
Published: December 2022

Abstract
Communication networks of future generations should provide a high level of spectral efficiency. The multiple access method is one of the technologies that directly affect this parameter. During the discussion of fifth-generation communication networks, a new approach to designing the non-orthogonal multiple access was proposed. One of the implementation techniques of this approach is sparse code multiple access. In the article, we consider this method and propose an approach to the development of a modulation code scheme to evaluate the sparse code multiple access performance and efficiency under transmission conditions close to reality. The approach is based on a similar modulation code scheme of existing communication systems. To form sparse code multiple access symbols, a codebook based on the mother constellation rotation and interleaving method is considered. We also introduce a modulation code scheme table for SCMA communication systems and evaluate their spectral efficiency.
Study of the effect of the annular gap between the kta housing and the transverse segment partitions on the heat exchange efficiency
Authors: Nasibullina O A , Kasintseva D D 
Published: December 2022

Abstract
In modern industry, specially designed devices, called heat exchangers, are used to carry out heat exchange between working bodies (heat exchangers). They are widely used in all industries (chemical, oil and gas, food, etc.), which is due to the high reliability of the design, high productivity, simplicity of design and a variety of types and designs. The objective of the investigation is to simulate heat exchange in a shell-and-tube heat exchanger without an annular gap between the housing and segment transverse partitions and with a gap equal to 6 mm, and then determine at which of these two gaps the heat exchanger thermal efficiency is highest. The simulation was performed in ANSYS Workbench. The comparison of the energy efficiency of the apparatus was made using the Kirpichev criterion. This criterion is quite simple and does not require finding a large number of various parameters. With this criterion, it is possible to determine in which case the heat exchanger will be most advantageous in terms of energy efficiency.
2D splash mode
Authors: Plachenov Alexandr , Dyakova Galina 
Published: December 2022

Abstract
A simple solution of the wave equation with two spatial variables having a similarity to the well known splash mode solutions is presented. It depends on two free parameters and describes a localized few-cycle pulse having finite energy. The behavior of the solution is studied both in the vicinity of the focus and at large times and distances. It was found that its real part at all points and at all instants of time is strictly positive. Integral representations for the solutions are derived and an expression for its total energy is found.
A simulation modeling approach used in the crude oil refining process
Authors: Tugashova Larisa , Bazhenov Ruslan , Abdyldaeva Umut , Korosteleva Irina , Muromtseva Elena 
Published: December 2022

Abstract
Mathematical and simulation modeling methods are applied when defining parameters of effective operation of oil fractionation. There is a review of software packages of process modeling used for refining ventures in the study. Multisphere model of oil fractionation with a low capacity applied is offered in the paper. The designed model allows taking into account constructive peculiarities of the equipment of small capacity units. The flow diagram of the model calculation algorithm with the additional evaluator of petroleum products quality indices is given by the authors. A design matrix for a three-factor experiment involving a multisphere model is obtained. An orthogonal central composite design has been applied to improve the accuracy of the model and to consider a non-linear parameter link. The MatLab software was chosen as an enabler. The criterion was the energy cost of separation. Factors affecting the criterion are flow rate of superheated water steam, reflux rate, potential light fractions in the crude/feed. The adequate obtained regression quadratic dependency towards the initial values by Fisher’s criterion has been assessed. The average relative error was 0.21 percent. The obtained statistical model can be applied for solving an optimization problem by the criterion of power consumption within a variable fractional composition of the raw material. Quality indices of oil products (gasoline fraction and diesel oil) serve as constraints. The offered statistical model applied at oil fractionation low-power facilities promotes the efficiency of plant operation improvement and the efficiency of obtaining information about the quality of oil products.
Modeling and multicriterial optimization of the mortise forming process in pine wood blanks
Authors: Rubleva Olga 
Published: December 2022

Abstract
The forming of the joint profile is an important stage in the technological process of manufacturing joints for wood splicing. A promising direction for improving this technology stage is the development of waste-free methods for the formation of high-quality finger joints using the technique of local pressing in the longitudinal direction. The introduction of technology into the production process requires a reasonable choice of the parameters of technological modes. One of the most important output parameter of the pressing process is the hardness of the mortise bottom, together with the pressing force and the depth of the densified zone. The first task of the research is the development of a model describing the impact of the technological modes on the hardness of the mortise bottom. The second task is the determination of the modes at which the resulting process parameters, or output functions (pressing force, depth of the densified zone, hardness of the mortise bottom) acquire optimal values. Data processing, their statistical analysis, and obtaining a regression model for determining hardness were carried out using the Statistica software package. The search for the extreme values of the output functions and the search for a compromise solution for finding rational values of the technological modes were carried out using the generalized reduced gradient method realized in the Excel Solver add-in. A predictive model was obtained for the hardness of the mortise bottom depending on the state of the wood and the parameters of the pressed mortise. Rational values of the input factors (moisture content, depth and width of the mortises) and the expected values of the output parameters for pine wood blanks were determined. The obtained values make it possible to recommend the technological modes of end local pressing of mortises in an industrial environment. The objective function has the potential to decrease the width of the mortises and to increase their length. This result can be used to improve the strength characteristics of adhesive joints on multiple pressed mortises and tenons.