Pub Date : 2023-10-26DOI: 10.35596/1729-7648-2023-21-5-73-80
Van Trieu Tran, K. V. Korsak, P. E. Novikov, I. Yu. Lovshenko, S. M. Zavadski, D. A. Golosov, A. A. Stepanov, A. A. Hubarevich, V. V. Kolos, Ya. A. Solovjov, D. S. Liauchuk, V. R. Stempitsky
The increased interest in utilizing uncooled thermal bolometer-type detectors (microbolometers) within the infrared or terahertz detection field is justified by their operational and technological characteristics, in particular: relatively low manufacturing cost, high detection efficiency, compatibility with silicon CMOS technology, and operation at room temperature. The performance of such detectors depends on optimizing critical parameters, which are dictated by both the geometrical design and the electrical, optical, and thermal properties of the materials used. The determination of optical parameters stands as a decisive factor in the design of microbolometer structures. This article delves into the examination of optical parameters of thin films of structural materials of microbolometer based on thermosensitive vanadium oxide film manufactured at JSC “INTEGRAL”. The investigation showcases the results of determining optical constants (refractive indexes n and absorption coefficients k ) of thin films from the transmission curve by applying the reflection-transmission method. Furthermore, a comparison is carried out between the results of computer modeling of the transmission, reflection and absorption spectra – taking into account the obtained values of the coefficients n and k – and the empirical data from the in-situ experiment.
{"title":"Calculation of Optical Parameters of Thin Films of Structural Materials of Thermal Uncooled Bolometric Type Detector","authors":"Van Trieu Tran, K. V. Korsak, P. E. Novikov, I. Yu. Lovshenko, S. M. Zavadski, D. A. Golosov, A. A. Stepanov, A. A. Hubarevich, V. V. Kolos, Ya. A. Solovjov, D. S. Liauchuk, V. R. Stempitsky","doi":"10.35596/1729-7648-2023-21-5-73-80","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-5-73-80","url":null,"abstract":"The increased interest in utilizing uncooled thermal bolometer-type detectors (microbolometers) within the infrared or terahertz detection field is justified by their operational and technological characteristics, in particular: relatively low manufacturing cost, high detection efficiency, compatibility with silicon CMOS technology, and operation at room temperature. The performance of such detectors depends on optimizing critical parameters, which are dictated by both the geometrical design and the electrical, optical, and thermal properties of the materials used. The determination of optical parameters stands as a decisive factor in the design of microbolometer structures. This article delves into the examination of optical parameters of thin films of structural materials of microbolometer based on thermosensitive vanadium oxide film manufactured at JSC “INTEGRAL”. The investigation showcases the results of determining optical constants (refractive indexes n and absorption coefficients k ) of thin films from the transmission curve by applying the reflection-transmission method. Furthermore, a comparison is carried out between the results of computer modeling of the transmission, reflection and absorption spectra – taking into account the obtained values of the coefficients n and k – and the empirical data from the in-situ experiment.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":"27 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134907635","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 : 2023-10-26DOI: 10.35596/1729-7648-2023-21-5-112-119
Ma Jun, V. Yu. Tsviatkou, A. A. Boriskevich
The problem of forming the skeletons of halftone images with two-mode brightness histograms under conditions of changing contrast and noise is considered. On such histograms, one mode corresponds to the objects, and the other to the background. Thanks to this feature, images are relatively easy to binarize and then skeletonize. The skeleton of a region uniform in brightness is a set of thin (limited by one-pixel) connected lines enclosed within this region and compactly describing its structure. Under conditions of high contrast and low noise on the original halftone image, binary skeletonization algorithms are widely used. They are relatively simple and can be resistant to multiplicative noise that appears at the boundaries of the regions after binarization. However, when the contrast is reduced and the noise of the original halftone image is increased, the skeletons formed by such algorithms are destroyed under the influence of additive noise, which manifests itself in the depth of the regions of the skeletonized binary image. To reduce skeletonization errors in such cases, algorithms based on preliminary low-pass filtering of the original grayscale image are used. To increase the stability of the skeletons of halftone images with a two-mode brightness histogram to noise, the article proposes a skeletonization model that takes into account the presence of multiplicative and additive noise components in a binary skeletonized image. Taking this model into account, a skeletonization algorithm has been developed, which takes into account the distortions in the shapes of the areas of the skeletonized binary image as a result of low-frequency filtering of the original halftone image and allows to reduce errors in the skeletonization of halftone images.
{"title":"Skeleting of Low-Contrast Noisy Halftone Images","authors":"Ma Jun, V. Yu. Tsviatkou, A. A. Boriskevich","doi":"10.35596/1729-7648-2023-21-5-112-119","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-5-112-119","url":null,"abstract":"The problem of forming the skeletons of halftone images with two-mode brightness histograms under conditions of changing contrast and noise is considered. On such histograms, one mode corresponds to the objects, and the other to the background. Thanks to this feature, images are relatively easy to binarize and then skeletonize. The skeleton of a region uniform in brightness is a set of thin (limited by one-pixel) connected lines enclosed within this region and compactly describing its structure. Under conditions of high contrast and low noise on the original halftone image, binary skeletonization algorithms are widely used. They are relatively simple and can be resistant to multiplicative noise that appears at the boundaries of the regions after binarization. However, when the contrast is reduced and the noise of the original halftone image is increased, the skeletons formed by such algorithms are destroyed under the influence of additive noise, which manifests itself in the depth of the regions of the skeletonized binary image. To reduce skeletonization errors in such cases, algorithms based on preliminary low-pass filtering of the original grayscale image are used. To increase the stability of the skeletons of halftone images with a two-mode brightness histogram to noise, the article proposes a skeletonization model that takes into account the presence of multiplicative and additive noise components in a binary skeletonized image. Taking this model into account, a skeletonization algorithm has been developed, which takes into account the distortions in the shapes of the areas of the skeletonized binary image as a result of low-frequency filtering of the original halftone image and allows to reduce errors in the skeletonization of halftone images.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":"67 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134905976","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 : 2023-10-26DOI: 10.35596/1729-7648-2023-21-5-59-67
A. A. Shmelkova, V. V. Andreev, V. E. Drach
For a noise-reduction filter, the parameters of the manufactured device often do not fit the expected parameters during development, what is caused by the spread of the parameters of the electronic components or their parasitic parameters, as well as due to the presence of its own capacitance and inductance of the frequency response assembly. In this article, the influence of parasitic parameters of components and fasteners on the filter frequency response is considered. Utilizing the electronic simulator software, the filter parameters were modeled in the frequency range from 10 kHz to 1 GHz. Based on the simulation results, recommendations were given for optimizing the filter mounting elements and changing the inductance of low-frequency chokes.
{"title":"Parameter Optimization of Noise-Reduction Filters of Hi-Performance Power Supplies","authors":"A. A. Shmelkova, V. V. Andreev, V. E. Drach","doi":"10.35596/1729-7648-2023-21-5-59-67","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-5-59-67","url":null,"abstract":"For a noise-reduction filter, the parameters of the manufactured device often do not fit the expected parameters during development, what is caused by the spread of the parameters of the electronic components or their parasitic parameters, as well as due to the presence of its own capacitance and inductance of the frequency response assembly. In this article, the influence of parasitic parameters of components and fasteners on the filter frequency response is considered. Utilizing the electronic simulator software, the filter parameters were modeled in the frequency range from 10 kHz to 1 GHz. Based on the simulation results, recommendations were given for optimizing the filter mounting elements and changing the inductance of low-frequency chokes.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134907100","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 : 2023-10-26DOI: 10.35596/1729-7648-2023-21-5-96-103
P. Y. Brancevich
As large amounts of data are received and accumulated, the need to create automated and automatic decision-making systems for a wide variety of tasks becomes more and more urgent. In the technical field, one of them is technical diagnostics, and in medicine, diagnostics of the human condition. Currently, dozens of computer systems for continuous vibration control and monitoring of complex rotary-type units are in commercial operation, which form time trends for 14 vibration parameters with a time step of 1–8 s for each control point at the operated facility. The functionality of a universal decision-making module is proposed, the input data of which are the parameters and characteristics of the observed object, with the required resulting output decision.
{"title":"Implementation of Decision-Making Systems Based on a Typical Decisive Element","authors":"P. Y. Brancevich","doi":"10.35596/1729-7648-2023-21-5-96-103","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-5-96-103","url":null,"abstract":"As large amounts of data are received and accumulated, the need to create automated and automatic decision-making systems for a wide variety of tasks becomes more and more urgent. In the technical field, one of them is technical diagnostics, and in medicine, diagnostics of the human condition. Currently, dozens of computer systems for continuous vibration control and monitoring of complex rotary-type units are in commercial operation, which form time trends for 14 vibration parameters with a time step of 1–8 s for each control point at the operated facility. The functionality of a universal decision-making module is proposed, the input data of which are the parameters and characteristics of the observed object, with the required resulting output decision.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135013489","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 : 2023-10-26DOI: 10.35596/1729-7648-2023-21-5-68-72
A. A. Kurayev, V. V. Matveyenka
In a four-mirror gyrotron, a wide multi-screw electron beam, being in crossed electric and longitudinal magnetic fields, drifts with a velocity v d = E 0 / B 0 in the direction of the T -wave propagation between the resonator mirrors (co-current wave) or in the opposite direction (counter-propagating wave). In this case, in accordance with the Doppler effect, the generation frequency ω is determined from the synchronism conditions as ω ≈ k ω l (1±β d ), β d = v d / с . Thus, a change in E 0 changes ω, i. e. electrical frequency tuning is carried out. The article presents a diagram of the design of a two-beam four-mirror gyrotron. The calculations were carried out for β d = 0.5, q = β || /β ⊥ = 2, the interaction was carried out at the frequency harmonic number k = 1. The tuning band was 20 %. The maximum efficiency is 48 %, the minimum is 33 %. Since the calculations were performed for dimensionless parameters, i.e., having a universal character, the physical characteristics of the gyrotron at a wavelength λ = 6 mm ( f 0 = 50 GHz) and a loaded resonator quality factor Q l = 200 were as follows: electron beam current I 0 = 60 A, B 0 = 2 T, voltage U 0 = 79 kV, efficiency = 48 %.
在四镜回旋管中，宽的多螺旋电子束处于交叉的电场和纵向磁场中，以速度v d = E 0 / B 0沿谐振镜之间的T波传播方向(共流波)或反方向(反传播波)漂移。在这种情况下，根据多普勒效应，产生频率ω由同步条件确定为ω≈k ω l(1±β d)， β d = v d / r。因此，e0的变化改变了ω，即进行了电频率调谐。本文给出了一种双光束四镜回旋管的设计示意图。在β d = 0.5, q = β || /β⊥= 2时进行计算，在频率谐波数k = 1时进行相互作用。调音波段为20%。最高效率为48%，最低效率为33%。由于计算是针对无量因参数进行的，即具有通用特性，因此在波长λ = 6 mm (f 0 = 50 GHz)和负载谐振器质量因子Q 1 = 200时，回旋管的物理特性如下:电子束电流I 0 = 60 a, B 0 = 2 T，电压U 0 = 79 kV，效率= 48%。
{"title":"Electrically Tunable Four-Mirror Gyrotron with Crossed Fields","authors":"A. A. Kurayev, V. V. Matveyenka","doi":"10.35596/1729-7648-2023-21-5-68-72","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-5-68-72","url":null,"abstract":"In a four-mirror gyrotron, a wide multi-screw electron beam, being in crossed electric and longitudinal magnetic fields, drifts with a velocity v d = E 0 / B 0 in the direction of the T -wave propagation between the resonator mirrors (co-current wave) or in the opposite direction (counter-propagating wave). In this case, in accordance with the Doppler effect, the generation frequency ω is determined from the synchronism conditions as ω ≈ k ω l (1±β d ), β d = v d / с . Thus, a change in E 0 changes ω, i. e. electrical frequency tuning is carried out. The article presents a diagram of the design of a two-beam four-mirror gyrotron. The calculations were carried out for β d = 0.5, q = β || /β ⊥ = 2, the interaction was carried out at the frequency harmonic number k = 1. The tuning band was 20 %. The maximum efficiency is 48 %, the minimum is 33 %. Since the calculations were performed for dimensionless parameters, i.e., having a universal character, the physical characteristics of the gyrotron at a wavelength λ = 6 mm ( f 0 = 50 GHz) and a loaded resonator quality factor Q l = 200 were as follows: electron beam current I 0 = 60 A, B 0 = 2 T, voltage U 0 = 79 kV, efficiency = 48 %.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":"12 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134906762","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 : 2023-10-26DOI: 10.35596/1729-7648-2023-21-5-50-58
V. I. Mordachev
The declared increase in spatial density of user (terminal, peripheral, etc.) radiating equipment (UE) of mobile communications up to 0.1 UE/m 2 in 4G (LTE) networks, up to 1.0 UE/m 2 in 5G (NR) networks and up to 10 UE/m 2 in promising 6G networks may cause an unacceptable increase in electromagnetic background and in corresponding forced risks to public health. The paper proposes a method for assessing the contribution of UE radiations to the level of anthropogenic electromagnetic background created by mobile communications. This method is based on the analysis of the electromagnetic loading on the area created by stationary and mobile radiation sources of mobile communications and determined by the area density of mobile traffic, its asymmetry in downlink and uplink data transmission, the degree of UE concentration in the observation point vicinity, the radio channels spectral efficiency, the size of base stations service areas and other characteristics. The calculated data are given, indicating that in places of UE concentration, the component of electromagnetic background formed by UE radiations may be predominant, many times exceeding the contribution of base station radiations, and determining the actual level of forced risks to public health, which requires consideration in the system of their hygienic rationing.
{"title":"Assessment of the Contribution of Radiations of User Equipment to the Anthropogenic Electromagnetic Background Created by Mobile (Cellular) Communications","authors":"V. I. Mordachev","doi":"10.35596/1729-7648-2023-21-5-50-58","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-5-50-58","url":null,"abstract":"The declared increase in spatial density of user (terminal, peripheral, etc.) radiating equipment (UE) of mobile communications up to 0.1 UE/m 2 in 4G (LTE) networks, up to 1.0 UE/m 2 in 5G (NR) networks and up to 10 UE/m 2 in promising 6G networks may cause an unacceptable increase in electromagnetic background and in corresponding forced risks to public health. The paper proposes a method for assessing the contribution of UE radiations to the level of anthropogenic electromagnetic background created by mobile communications. This method is based on the analysis of the electromagnetic loading on the area created by stationary and mobile radiation sources of mobile communications and determined by the area density of mobile traffic, its asymmetry in downlink and uplink data transmission, the degree of UE concentration in the observation point vicinity, the radio channels spectral efficiency, the size of base stations service areas and other characteristics. The calculated data are given, indicating that in places of UE concentration, the component of electromagnetic background formed by UE radiations may be predominant, many times exceeding the contribution of base station radiations, and determining the actual level of forced risks to public health, which requires consideration in the system of their hygienic rationing.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134906926","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 : 2023-10-26DOI: 10.35596/1729-7648-2023-21-5-88-95
E. V. Zaiko, P. N. Shumsky
In the article the device of radar-tracking recognition allowing on the basis of the analysis of a design of impellent installation to define a class (type) of observable air object is considered. Determination of the class (type) of the observed object was carried out by studying the ratios of the modulation frequencies of the spectral radar portrait. The solving rule, as well as the device block diagram are obtained, allowing to define the class and, in addition, the type of the observed air object equipped with a turbojet engine. To form a posteriori probability density, the numerical method of Monte-Carlo was used. The results of the mathematical modelling, confirming the efficiency of the proposed device, are presented.
{"title":"Recognition of Aerodynamic Objects on Spectral Portraits Taking into Account Design Features of Turbojets","authors":"E. V. Zaiko, P. N. Shumsky","doi":"10.35596/1729-7648-2023-21-5-88-95","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-5-88-95","url":null,"abstract":"In the article the device of radar-tracking recognition allowing on the basis of the analysis of a design of impellent installation to define a class (type) of observable air object is considered. Determination of the class (type) of the observed object was carried out by studying the ratios of the modulation frequencies of the spectral radar portrait. The solving rule, as well as the device block diagram are obtained, allowing to define the class and, in addition, the type of the observed air object equipped with a turbojet engine. To form a posteriori probability density, the numerical method of Monte-Carlo was used. The results of the mathematical modelling, confirming the efficiency of the proposed device, are presented.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":"126 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134905699","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 : 2023-10-26DOI: 10.35596/1729-7648-2023-21-5-104-111
S. V. Mazur, A. I. Golovaty
A study was conducted on the control of a person’s pulse in the normal state and while in virtual reality. It has been established that a person’s pulse can increase significantly when he is in virtual reality. In this case, there may be various stressful situations, during which the pulse sharply quickens several times. In the process of research, a person’s pulse was predicted based on several machine learning models, which made it possible to predict a person’s condition in the near future and coordinate a series of actions to prevent risks. The most suitable models were linear regression and SSA, which showed the most accurate and plausible results. By monitoring the human heart rate in virtual reality, virtual reality scenes can be classified according to the degree of their effect on the human body. This allows to take into account people with various chronic diseases and to limit their access to scenes that are contraindicated for them. The result of the research was a software package that allows to continuously collectheart beat rate data while in virtual reality from a Bluetooth Low Energy device.
{"title":"Automated Monitoring of Human Physiological Parameters While Being in Virtual Reality","authors":"S. V. Mazur, A. I. Golovaty","doi":"10.35596/1729-7648-2023-21-5-104-111","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-5-104-111","url":null,"abstract":"A study was conducted on the control of a person’s pulse in the normal state and while in virtual reality. It has been established that a person’s pulse can increase significantly when he is in virtual reality. In this case, there may be various stressful situations, during which the pulse sharply quickens several times. In the process of research, a person’s pulse was predicted based on several machine learning models, which made it possible to predict a person’s condition in the near future and coordinate a series of actions to prevent risks. The most suitable models were linear regression and SSA, which showed the most accurate and plausible results. By monitoring the human heart rate in virtual reality, virtual reality scenes can be classified according to the degree of their effect on the human body. This allows to take into account people with various chronic diseases and to limit their access to scenes that are contraindicated for them. The result of the research was a software package that allows to continuously collectheart beat rate data while in virtual reality from a Bluetooth Low Energy device.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":"3 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135013352","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 : 2023-10-26DOI: 10.35596/1729-7648-2023-21-5-81-87
E. A. Bushchyk
Management business processes of educational work in an institution of secondary special education, such as the planning of ideological, educational and information work, organization of curator’s work, organization and formation of culture of safe life activity, everyday life, leisure, physical culture and healthy lifestyle are considered. The business process model “Curator’s work management” in BPMN notation is presented. With the help of set theory, the output data of business process models of educational work are presented. The ontological model of educational work in an institution of secondary specialized education is developed. This model displays classes, instances, and relations between them, which allows structuring and unifying the knowledge base of the subject area under consideration.
{"title":"Ontological Representation of Business Processes in an Educational Institution","authors":"E. A. Bushchyk","doi":"10.35596/1729-7648-2023-21-5-81-87","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-5-81-87","url":null,"abstract":"Management business processes of educational work in an institution of secondary special education, such as the planning of ideological, educational and information work, organization of curator’s work, organization and formation of culture of safe life activity, everyday life, leisure, physical culture and healthy lifestyle are considered. The business process model “Curator’s work management” in BPMN notation is presented. With the help of set theory, the output data of business process models of educational work are presented. The ontological model of educational work in an institution of secondary specialized education is developed. This model displays classes, instances, and relations between them, which allows structuring and unifying the knowledge base of the subject area under consideration.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134906934","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 : 2023-10-25DOI: 10.35596/1729-7648-2023-21-5-42-49
S. R. Heister, V. V. Kirychenka
The detection of low-speed objects is a challenging task. The small radar cross-section of low-speed objects varying from one-thousandths to one-tens of a square meter practically excludes a successful detection of such objects against intense clutter from static objects by existing methods. In this work we present a method of coherent compensation of clutter from static objects in the sidelobes of the spectrum. The method provides successful detection of low-speed and low-visibility objects with reflective characteristics that create signals with power comparable to the power of spectral sidelobes of the clutter. The method is based on the representation of the side lobes of the spectrum of interfering reflections not in the form of noise, which determines the limiting level of “background whitening”, but in the form of a coherent spectral structure, amenable to further compensation. The proposed method must be especially effective in complicated situations such as when detecting signals reflected from low-speed and low-visibility objects (e.g., quadcopters) versus intensive clutter reflections from metal structures and buildings.
{"title":"Method for Coherent Compensation of Side Lobes of the Spectrum of Interfering Reflections in the Problem of Detecting Low-Speed and Inconspicuous Objects","authors":"S. R. Heister, V. V. Kirychenka","doi":"10.35596/1729-7648-2023-21-5-42-49","DOIUrl":"https://doi.org/10.35596/1729-7648-2023-21-5-42-49","url":null,"abstract":"The detection of low-speed objects is a challenging task. The small radar cross-section of low-speed objects varying from one-thousandths to one-tens of a square meter practically excludes a successful detection of such objects against intense clutter from static objects by existing methods. In this work we present a method of coherent compensation of clutter from static objects in the sidelobes of the spectrum. The method provides successful detection of low-speed and low-visibility objects with reflective characteristics that create signals with power comparable to the power of spectral sidelobes of the clutter. The method is based on the representation of the side lobes of the spectrum of interfering reflections not in the form of noise, which determines the limiting level of “background whitening”, but in the form of a coherent spectral structure, amenable to further compensation. The proposed method must be especially effective in complicated situations such as when detecting signals reflected from low-speed and low-visibility objects (e.g., quadcopters) versus intensive clutter reflections from metal structures and buildings.","PeriodicalId":33565,"journal":{"name":"Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki","volume":"56 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135167630","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：