Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki最新文献

Calculation of Optical Parameters of Thin Films of Structural Materials of Thermal Uncooled Bolometric Type Detector 热非冷却热量型探测器结构材料薄膜光学参数的计算

Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki Pub Date : 2023-10-26 DOI: 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

{"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}

引用次数: 0

Skeleting of Low-Contrast Noisy Halftone Images 低对比度噪声半色调图像的骨架化

Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki Pub Date : 2023-10-26 DOI: 10.35596/1729-7648-2023-21-5-112-119

Ma Jun, V. Yu. Tsviatkou, A. A. Boriskevich

{"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}

引用次数: 0

Parameter Optimization of Noise-Reduction Filters of Hi-Performance Power Supplies 高性能电源降噪滤波器的参数优化

Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki Pub Date : 2023-10-26 DOI: 10.35596/1729-7648-2023-21-5-59-67

A. A. Shmelkova, V. V. Andreev, V. E. Drach

引用次数: 0

Implementation of Decision-Making Systems Based on a Typical Decisive Element 基于典型决策要素的决策系统实现

Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki Pub Date : 2023-10-26 DOI: 10.35596/1729-7648-2023-21-5-96-103

P. Y. Brancevich

引用次数: 0

Electrically Tunable Four-Mirror Gyrotron with Crossed Fields 具有交叉场的电调谐四镜回旋管

Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki Pub Date : 2023-10-26 DOI: 10.35596/1729-7648-2023-21-5-68-72

A. A. Kurayev, V. V. Matveyenka

{"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}

引用次数: 0

Assessment of the Contribution of Radiations of User Equipment to the Anthropogenic Electromagnetic Background Created by Mobile (Cellular) Communications 评估用户设备的辐射对移动(蜂窝)通信产生的人为电磁背景的贡献

Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki Pub Date : 2023-10-26 DOI: 10.35596/1729-7648-2023-21-5-50-58

V. I. Mordachev

{"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}

引用次数: 0

Recognition of Aerodynamic Objects on Spectral Portraits Taking into Account Design Features of Turbojets 考虑涡喷发动机设计特点的谱图气动目标识别

Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki Pub Date : 2023-10-26 DOI: 10.35596/1729-7648-2023-21-5-88-95

E. V. Zaiko, P. N. Shumsky

引用次数: 0

Automated Monitoring of Human Physiological Parameters While Being in Virtual Reality 虚拟现实中人体生理参数的自动监测

Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki Pub Date : 2023-10-26 DOI: 10.35596/1729-7648-2023-21-5-104-111

S. V. Mazur, A. I. Golovaty

{"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}

引用次数: 0

Ontological Representation of Business Processes in an Educational Institution 教育机构业务流程的本体论表示

Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki Pub Date : 2023-10-26 DOI: 10.35596/1729-7648-2023-21-5-81-87

E. A. Bushchyk

引用次数: 0

Method for Coherent Compensation of Side Lobes of the Spectrum of Interfering Reflections in the Problem of Detecting Low-Speed and Inconspicuous Objects 低速不显著目标检测中干涉反射谱旁瓣的相干补偿方法

Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioelektroniki Pub Date : 2023-10-25 DOI: 10.35596/1729-7648-2023-21-5-42-49

S. R. Heister, V. V. Kirychenka

{"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}

引用次数: 0