Pub Date : 2023-08-28DOI: 10.35596/1729-7648-2023-21-4-19-27
V. Zelenin, E. O. Narushko, A. D. Gladinov
The formation processes of coatings of Cu–Ni and Ag–Cu systems with a stable elemental composition by the method of electron-beam evaporation are considered. It is shown that in the zone of action of the electron beam on the ingot placed in the crucible at the total vapor pressure of the alloy elements Σp above the pressure under the cap of the installation, the melt boils, and in the outer zone adjacent to the melt zone, the process of sublimation of the hard alloy occurs. The microrelief and elemental composition of the surface layer of the Cu–Ni alloy ingot in the zones of evaporation and sublimation, as well as the elemental composition of the coatings deposited in this case, have been studied. It is shown that the most acceptable way to obtain coatings of the Cu–Ni system with a stable elemental composition is the simultaneous electron-beam evaporation of copper and nickel from two crucibles. The azeotropic composition of the alloy of the Ag–Cu system was calculated and experimentally verified. The research results are used in the manufacture of multilayered screens of electromagnetic radiation.
{"title":"Obtaining Multicomponent Coatings of a Stable Composition for Electromagnetic Radiation Screens","authors":"V. Zelenin, E. O. Narushko, A. D. Gladinov","doi":"10.35596/1729-7648-2023-21-4-19-27","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-4-19-27","url":null,"abstract":"The formation processes of coatings of Cu–Ni and Ag–Cu systems with a stable elemental composition by the method of electron-beam evaporation are considered. It is shown that in the zone of action of the electron beam on the ingot placed in the crucible at the total vapor pressure of the alloy elements Σp above the pressure under the cap of the installation, the melt boils, and in the outer zone adjacent to the melt zone, the process of sublimation of the hard alloy occurs. The microrelief and elemental composition of the surface layer of the Cu–Ni alloy ingot in the zones of evaporation and sublimation, as well as the elemental composition of the coatings deposited in this case, have been studied. It is shown that the most acceptable way to obtain coatings of the Cu–Ni system with a stable elemental composition is the simultaneous electron-beam evaporation of copper and nickel from two crucibles. The azeotropic composition of the alloy of the Ag–Cu system was calculated and experimentally verified. The research results are used in the manufacture of multilayered screens of electromagnetic radiation.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43041677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-22DOI: 10.35596/1729-7648-2023-21-3-96-101
Yury I. Varatnitski, Raman A. Rumas
The results of a study of the architecture of hardware and software for unidirectional data transmission in computer networks are presented. The architecture is presented in the form of optical galvanic isolation, media converters and proxy servers, excluding bidirectional data transmission at the hardware level. Work on unidirectional data transmission is carried out on the basis of the UDP transport protocol, which provides operation without establishing bidirectional interaction. Unidirectional data transfer is carried out by a proxy server running a special sender’s software that performs unidirectional data file transfer. This software converts the source data file into a unidirectional stream of UDP datagrams. To receive a unidirectional stream of UDP datagrams, a proxy server is used, on which the recipient’s special software is running. The receiving proxy server receives, processes and generates the source data file. The reliability of the unidirectional transmission of data files is ensured by redundancy (multiple transmission) and checksum verification.
{"title":"Architecture of Hardware and Software for Unidirectional Data Transmission in Computer Networks","authors":"Yury I. Varatnitski, Raman A. Rumas","doi":"10.35596/1729-7648-2023-21-3-96-101","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-3-96-101","url":null,"abstract":"The results of a study of the architecture of hardware and software for unidirectional data transmission in computer networks are presented. The architecture is presented in the form of optical galvanic isolation, media converters and proxy servers, excluding bidirectional data transmission at the hardware level. Work on unidirectional data transmission is carried out on the basis of the UDP transport protocol, which provides operation without establishing bidirectional interaction. Unidirectional data transfer is carried out by a proxy server running a special sender’s software that performs unidirectional data file transfer. This software converts the source data file into a unidirectional stream of UDP datagrams. To receive a unidirectional stream of UDP datagrams, a proxy server is used, on which the recipient’s special software is running. The receiving proxy server receives, processes and generates the source data file. The reliability of the unidirectional transmission of data files is ensured by redundancy (multiple transmission) and checksum verification.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48637885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-22DOI: 10.35596/1729-7648-2023-21-3-87-95
С. А. Игнатьева, Р. П. Богуш, S. Ihnatsyeva, Rykhard P. Bohush
To improve the person re-identification system accuracy, an integrated approach is proposed in the formation of a training sample for convolutional neural networks, which involves the use of a new image dataset, an increase in the training examples number using existing datasets, and the use of a number of transformations to increase their diversity. The created dataset PolReID1077 contains images of people that were obtained in all seasons, which will improve the correct operation of re-identification systems when the seasons change. Another PolReID1077 advantage is the video data use obtained from external and internal surveillance in a large number of different filming locations. Therefore, the people images in the created set are characterized by the variability of the background, brightness and color characteristics. Joining the created dataset with the existing CUHK02, CUHK03, Market-1501, DukeMTMC-ReID and MSMT17 sets made it possible to obtain 109 772 images for training. An increase in the variety of generated examples is achieved by applying a cyclic shift to them, eliminating color and replacing a fragment with a reduced copy of another image. The research results on estimating the accuracy of re-identification for the ResNet-50 and DenseNet-121 convolutional neural networks during their training, using the proposed approach to form a training sample, are presented.
{"title":"Training Sample Formation for Convolution Neural Networks to Person Re-Identification from Video","authors":"С. А. Игнатьева, Р. П. Богуш, S. Ihnatsyeva, Rykhard P. Bohush","doi":"10.35596/1729-7648-2023-21-3-87-95","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-3-87-95","url":null,"abstract":"To improve the person re-identification system accuracy, an integrated approach is proposed in the formation of a training sample for convolutional neural networks, which involves the use of a new image dataset, an increase in the training examples number using existing datasets, and the use of a number of transformations to increase their diversity. The created dataset PolReID1077 contains images of people that were obtained in all seasons, which will improve the correct operation of re-identification systems when the seasons change. Another PolReID1077 advantage is the video data use obtained from external and internal surveillance in a large number of different filming locations. Therefore, the people images in the created set are characterized by the variability of the background, brightness and color characteristics. Joining the created dataset with the existing CUHK02, CUHK03, Market-1501, DukeMTMC-ReID and MSMT17 sets made it possible to obtain 109 772 images for training. An increase in the variety of generated examples is achieved by applying a cyclic shift to them, eliminating color and replacing a fragment with a reduced copy of another image. The research results on estimating the accuracy of re-identification for the ResNet-50 and DenseNet-121 convolutional neural networks during their training, using the proposed approach to form a training sample, are presented.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47352932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-22DOI: 10.35596/1729-7648-2023-21-3-70-77
Alexander V. Petukhov, А. В. Петухов
The aim of the study is to develop a mathematical model for the synthesis of technological operations in the structure of algorithms for a system of automated design of technological processes. When solving the problem of synthesis of technological operations in the structure of algorithms of the automated design system of technological processes for manufacturing prototypes of structurally complex products, the following algorithms are used: solving the direct choice problem; formation of a set of possible alternatives; checking possible alternatives for admissibility; formation of a set of acceptable alternatives; determining the set of desired typical technological solutions and optimizing the choice of solutions. A block diagram of the system of algorithms for the process of synthesis of technological operations, based on a combination of individual and standard technological solutions in the design of technological processes for the experimental production of prototypes of structurally complex products, has been obtained.
{"title":"Algorithms for Synthesis of Technological Operations for Manufacturing Samples of Structurally Complex Products","authors":"Alexander V. Petukhov, А. В. Петухов","doi":"10.35596/1729-7648-2023-21-3-70-77","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-3-70-77","url":null,"abstract":"The aim of the study is to develop a mathematical model for the synthesis of technological operations in the structure of algorithms for a system of automated design of technological processes. When solving the problem of synthesis of technological operations in the structure of algorithms of the automated design system of technological processes for manufacturing prototypes of structurally complex products, the following algorithms are used: solving the direct choice problem; formation of a set of possible alternatives; checking possible alternatives for admissibility; formation of a set of acceptable alternatives; determining the set of desired typical technological solutions and optimizing the choice of solutions. A block diagram of the system of algorithms for the process of synthesis of technological operations, based on a combination of individual and standard technological solutions in the design of technological processes for the experimental production of prototypes of structurally complex products, has been obtained.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44504718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-22DOI: 10.35596/1729-7648-2023-21-3-56-62
А. Ю. Шамына, А.А. Иванюк, A. Y. Shamyna, A. A. Ivaniuk
The features of building on the basis of programmable logic integrated circuits of “arbiter” physical unclonable functions (APUF) are considered. The problem of asymmetry of pairs of APUF paths is indicated and the negative impact of this phenomenon on their characteristics is noted. A time measuring system based on a ring oscillator scheme, which is used to analyze the time characteristics of APUF paths, is described. A method for automatic balancing of signal propagation delays through the APUF paths based on the calculation of the corrective value is proposed. The consistency of the proposed balancing technique is experimentally confirmed based on the improvement in the characteristics of the APUF after its implementation. A digital scheme of this technique is presented, which can form the basis for the development of a delay auto correction scheme through APUF paths with different levels of autonomy.
{"title":"Automatic Balancing of “Arbiter” Physical Unclonable Function Paths","authors":"А. Ю. Шамына, А.А. Иванюк, A. Y. Shamyna, A. A. Ivaniuk","doi":"10.35596/1729-7648-2023-21-3-56-62","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-3-56-62","url":null,"abstract":"The features of building on the basis of programmable logic integrated circuits of “arbiter” physical unclonable functions (APUF) are considered. The problem of asymmetry of pairs of APUF paths is indicated and the negative impact of this phenomenon on their characteristics is noted. A time measuring system based on a ring oscillator scheme, which is used to analyze the time characteristics of APUF paths, is described. A method for automatic balancing of signal propagation delays through the APUF paths based on the calculation of the corrective value is proposed. The consistency of the proposed balancing technique is experimentally confirmed based on the improvement in the characteristics of the APUF after its implementation. A digital scheme of this technique is presented, which can form the basis for the development of a delay auto correction scheme through APUF paths with different levels of autonomy.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47466231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-22DOI: 10.35596/1729-7648-2023-21-3-63-69
D. V. Vysotski, E. I. Khizhniak, A. V. Khizhniak
The article presents theoretical calculations that explain the origin of errors in the course of an aircraft in an automated control system when pointing at a maneuvering air target. The peculiarity of pointing at a maneuvering target is related to the execution of turns, which are characterized by overloads. The curvature of the trajectory in such areas is usually approximated by a circle of a certain radius, depending on the value of the overload and flight speed to intercept. In the automated control system, the current course of the aircraft is determined as the direction of movement by two marks corresponding to the current and previous moments of information update time. For a target moving in a straight line, this approach is valid. However, in a turn where the guidance path is a curved line, the true heading will correspond to the tangent at the turn point. The difference in these approaches determines the error of the course calculation. This article provides a formulaic calculation of turn radii for flight speeds to intercept an air target and overloads, as well as the calculation of true and current courses. The peculiarity of the methodology is a strict formalized mathematical description. The article presents the dependences of heading errors from the aircraft’s intercept flight speed and overloads using the example of the Su-27 multifunctional fighter.
{"title":"Methodology for Calculating Course Errors when Aiming an Aircraft at a Maneuvering Air Target","authors":"D. V. Vysotski, E. I. Khizhniak, A. V. Khizhniak","doi":"10.35596/1729-7648-2023-21-3-63-69","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-3-63-69","url":null,"abstract":"The article presents theoretical calculations that explain the origin of errors in the course of an aircraft in an automated control system when pointing at a maneuvering air target. The peculiarity of pointing at a maneuvering target is related to the execution of turns, which are characterized by overloads. The curvature of the trajectory in such areas is usually approximated by a circle of a certain radius, depending on the value of the overload and flight speed to intercept. In the automated control system, the current course of the aircraft is determined as the direction of movement by two marks corresponding to the current and previous moments of information update time. For a target moving in a straight line, this approach is valid. However, in a turn where the guidance path is a curved line, the true heading will correspond to the tangent at the turn point. The difference in these approaches determines the error of the course calculation. This article provides a formulaic calculation of turn radii for flight speeds to intercept an air target and overloads, as well as the calculation of true and current courses. The peculiarity of the methodology is a strict formalized mathematical description. The article presents the dependences of heading errors from the aircraft’s intercept flight speed and overloads using the example of the Su-27 multifunctional fighter.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43915423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-22DOI: 10.35596/1729-7648-2023-21-3-102-110
U. A. Vishniakou, Yiwei Xia
The results of studying the parameters of the spectra of speech signals by machine learning with the use of neural networks are presented. This study was carried out in order to confirm experimentally the possibility of performing an assessment of these parameters for the detection of Parkinson’s disease in the early stages (IT diagnostics). During the study, the public database was used, which systematized the spectra of vowel sounds uttered by patients with Parkinson’s disease. The applied method is binary data classification. In the course of the study, the speech data spectrum was first preprocessed, which consisted of filtering it in order to remove its noise components and eliminate bursts and gaps in it. Then the parameters of the processed spectrum of speech data were determined: average value, maximum and minimum, peak, wavelet coefficients, MFCC and TQWT. After that, the object was selected using the PCA algorithm. The model was trained using the Knn and Random Forest algorithms, as well as the Bayesian neural network. The Bayesian optimization algorithm and the GridSearch method were used to find the best model hyperparameters. It has been established that when using Knn, Random Forest and Bayesian neural network, it is possible to increase the accuracy of recognition of Parkinson’s disease by 94.7; 88.16 and 74.74 %, respectively. A similar study by other scientists showed that the recognition accuracy of data sets was only 86 %.
{"title":"IT Diagnostics of Parkinson’s Disease Based on the Analysis of Voice Markers and Machine Learning","authors":"U. A. Vishniakou, Yiwei Xia","doi":"10.35596/1729-7648-2023-21-3-102-110","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-3-102-110","url":null,"abstract":"The results of studying the parameters of the spectra of speech signals by machine learning with the use of neural networks are presented. This study was carried out in order to confirm experimentally the possibility of performing an assessment of these parameters for the detection of Parkinson’s disease in the early stages (IT diagnostics). During the study, the public database was used, which systematized the spectra of vowel sounds uttered by patients with Parkinson’s disease. The applied method is binary data classification. In the course of the study, the speech data spectrum was first preprocessed, which consisted of filtering it in order to remove its noise components and eliminate bursts and gaps in it. Then the parameters of the processed spectrum of speech data were determined: average value, maximum and minimum, peak, wavelet coefficients, MFCC and TQWT. After that, the object was selected using the PCA algorithm. The model was trained using the Knn and Random Forest algorithms, as well as the Bayesian neural network. The Bayesian optimization algorithm and the GridSearch method were used to find the best model hyperparameters. It has been established that when using Knn, Random Forest and Bayesian neural network, it is possible to increase the accuracy of recognition of Parkinson’s disease by 94.7; 88.16 and 74.74 %, respectively. A similar study by other scientists showed that the recognition accuracy of data sets was only 86 %.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43932523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-22DOI: 10.35596/1729-7648-2023-21-3-78-86
M. Y. Lavetski, V. Tsviatkou, A. A. Boriskevich, V. Lapitskaya, S. Chizhik
The problem of assessing the quality of combining component images formed in two synchronous channels of an atomic force microscope (AFM images), is considered. A computationally simple quality metric for combining component AFM images, based on local correlation coefficients is proposed, taking into account the contribution of each of the component AFM images to the resulting combined AFM image and the correlation between component AFM images. It is shown that local correlation provides a higher accuracy of AFM images combination quality estimation in comparison to the global correlation.
{"title":"Local Correlation Metric for Assessing the Quality of Combined AFM Images","authors":"M. Y. Lavetski, V. Tsviatkou, A. A. Boriskevich, V. Lapitskaya, S. Chizhik","doi":"10.35596/1729-7648-2023-21-3-78-86","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-3-78-86","url":null,"abstract":"The problem of assessing the quality of combining component images formed in two synchronous channels of an atomic force microscope (AFM images), is considered. A computationally simple quality metric for combining component AFM images, based on local correlation coefficients is proposed, taking into account the contribution of each of the component AFM images to the resulting combined AFM image and the correlation between component AFM images. It is shown that local correlation provides a higher accuracy of AFM images combination quality estimation in comparison to the global correlation.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46381971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-21DOI: 10.35596/1729-7648-2023-21-3-41-47
П. Ю. Лакизо, Pavel YU. Lakizo
One of the main problems in the use of the radio frequency spectrum is its scarcity. This is due not only to its natural properties as a resource, but also to the inefficiency of its use. Work in this direction was carried out by scientists. In order to release the inefficiently used part of the radio frequency spectrum, it is necessary to develop management measures and mechanisms that create the most unfavorable conditions for the operation of this part of the spectrum by operators. The article discusses proposals for the implementation of the methodology, the model and criteria for a symbolic description of the assessment of the effectiveness of the use of the radio frequency spectrum, including information and software implementation of a multi-agent system that allows for automated decision making, for a comprehensive assessment of the effectiveness of the use of the radio frequency spectrum. A model of the overall efficiency of using the radio frequency spectrum based on three types of efficiency has been proposed, and a scale of intervals for these types has been developed. An assessment of the efficiency of the radio frequency spectrum based on a reference network of cellular mobile communications has been performed. A decision making variant based on the results of evaluating this efficiency is presented.
{"title":"Decision-Making Method Based on a Comprehensive Assessment of the Effectiveness of the Radio Frequency Spectrum","authors":"П. Ю. Лакизо, Pavel YU. Lakizo","doi":"10.35596/1729-7648-2023-21-3-41-47","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-3-41-47","url":null,"abstract":"One of the main problems in the use of the radio frequency spectrum is its scarcity. This is due not only to its natural properties as a resource, but also to the inefficiency of its use. Work in this direction was carried out by scientists. In order to release the inefficiently used part of the radio frequency spectrum, it is necessary to develop management measures and mechanisms that create the most unfavorable conditions for the operation of this part of the spectrum by operators. The article discusses proposals for the implementation of the methodology, the model and criteria for a symbolic description of the assessment of the effectiveness of the use of the radio frequency spectrum, including information and software implementation of a multi-agent system that allows for automated decision making, for a comprehensive assessment of the effectiveness of the use of the radio frequency spectrum. A model of the overall efficiency of using the radio frequency spectrum based on three types of efficiency has been proposed, and a scale of intervals for these types has been developed. An assessment of the efficiency of the radio frequency spectrum based on a reference network of cellular mobile communications has been performed. A decision making variant based on the results of evaluating this efficiency is presented.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42126244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-21DOI: 10.35596/1729-7648-2023-21-3-17-25
H. Doan, D. Golosov, J. Zhang, S. Zavadski, S. Melnikov, T. D. Nguyen
The article proposes a model for predicting the content of metal components of complex oxide films deposited by reactive magnetron sputtering of a two-component composite target in Ar/O2 gas mixture. The model takes into account the sputtering yield and ion-electron emission coefficients of the sputtered metals and their oxides, the distribution of the ion current density on the target, and the rate of the chemical reaction of the formation of oxides of these metals. To verify the proposed model, studies of the elemental composition of titanium-aluminum oxide films deposited by magnetron sputtering of a Ti-Al composite target in Ar and Ar/O2 gas mixture were carried out. It has been established that the model adequately describes the change in the content of metals in the deposited films with a change in the oxygen flow into the chamber. The simulation error does not exceed 10 %, this makes it possible to use the proposed model for predicting the content of metals in a film during reactive sputtering of two-component composite targets.
{"title":"Model of Reactive Magnetron Sputtering of a Two-Component Composite Target","authors":"H. Doan, D. Golosov, J. Zhang, S. Zavadski, S. Melnikov, T. D. Nguyen","doi":"10.35596/1729-7648-2023-21-3-17-25","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-3-17-25","url":null,"abstract":"The article proposes a model for predicting the content of metal components of complex oxide films deposited by reactive magnetron sputtering of a two-component composite target in Ar/O2 gas mixture. The model takes into account the sputtering yield and ion-electron emission coefficients of the sputtered metals and their oxides, the distribution of the ion current density on the target, and the rate of the chemical reaction of the formation of oxides of these metals. To verify the proposed model, studies of the elemental composition of titanium-aluminum oxide films deposited by magnetron sputtering of a Ti-Al composite target in Ar and Ar/O2 gas mixture were carried out. It has been established that the model adequately describes the change in the content of metals in the deposited films with a change in the oxygen flow into the chamber. The simulation error does not exceed 10 %, this makes it possible to use the proposed model for predicting the content of metals in a film during reactive sputtering of two-component composite targets.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43459015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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