Pub Date : 2022-05-12DOI: 10.52928/2070-1624-2022-38-4-32-37
A. Hodosevich, R. Bohush
A web-based system for monitoring and managing parking lots based on analysis of images from surveillance cameras is presented. An approach has been developed for segmentation of parking spaces, that allows you to automatically determine the coordinates of parking spaces in the image using the Otsu adaptive binarization algorithm and the Hough transform algorithm for linking lines. The classification of parking spaces by occupancy type is performed using the convolutional neural network ResNet50. The features of the implementation of the server part are given, the developed class diagram and their main purpose are described. The client part of the system is a website that can be accessed using a personal computer or mobile device. Examples for main software functionality are shown.
{"title":"CLIENT-SERVER SYSTEM FOR PARKING MANAGEMENT BASED ON VIDEO SURVEILLANCE DATA ANALYSIS","authors":"A. Hodosevich, R. Bohush","doi":"10.52928/2070-1624-2022-38-4-32-37","DOIUrl":"https://doi.org/10.52928/2070-1624-2022-38-4-32-37","url":null,"abstract":"A web-based system for monitoring and managing parking lots based on analysis of images from surveillance cameras is presented. An approach has been developed for segmentation of parking spaces, that allows you to automatically determine the coordinates of parking spaces in the image using the Otsu adaptive binarization algorithm and the Hough transform algorithm for linking lines. The classification of parking spaces by occupancy type is performed using the convolutional neural network ResNet50. The features of the implementation of the server part are given, the developed class diagram and their main purpose are described. The client part of the system is a website that can be accessed using a personal computer or mobile device. Examples for main software functionality are shown.","PeriodicalId":386243,"journal":{"name":"HERALD OF POLOTSK STATE UNIVERSITY. Series С FUNDAMENTAL SCIENCES","volume":"1 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126796726","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 : 2022-05-12DOI: 10.52928/2070-1624-2022-38-4-62-68
D. Dauhiala, V. Yanushkevich, V. Tikhanovich
The analysis of the causes of starting currents in toroidal transformers is carried out. The moment of occurrence of the maximum values of starting currents is revealed. A theoretical estimate of the calculation of the magnitude of the starting currents is given. Indirect and direct methods for estimating inrush currents, constructive measures to reduce inrush currents, as well as techniques for reducing the influence of transients on circuit breakers when operating toroidal transformers in a network with sinusoidal voltage are considered. A program has been developed for calculating starting currents for electrical steel 3413. The algorithm of the program and the results of its application are given. The results obtained can be applied to ensure the reliability of power supply at the stages of operation and installation of toroidal transformers of medium and high power.
{"title":"STARTING CURRENTS IN TOROIDAL TRANSFORMERS","authors":"D. Dauhiala, V. Yanushkevich, V. Tikhanovich","doi":"10.52928/2070-1624-2022-38-4-62-68","DOIUrl":"https://doi.org/10.52928/2070-1624-2022-38-4-62-68","url":null,"abstract":"The analysis of the causes of starting currents in toroidal transformers is carried out. The moment of occurrence of the maximum values of starting currents is revealed. A theoretical estimate of the calculation of the magnitude of the starting currents is given. Indirect and direct methods for estimating inrush currents, constructive measures to reduce inrush currents, as well as techniques for reducing the influence of transients on circuit breakers when operating toroidal transformers in a network with sinusoidal voltage are considered. A program has been developed for calculating starting currents for electrical steel 3413. The algorithm of the program and the results of its application are given. The results obtained can be applied to ensure the reliability of power supply at the stages of operation and installation of toroidal transformers of medium and high power.","PeriodicalId":386243,"journal":{"name":"HERALD OF POLOTSK STATE UNIVERSITY. Series С FUNDAMENTAL SCIENCES","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127973302","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 : 2022-05-12DOI: 10.52928/2070-1624-2022-38-4-92-102
F. Lomovtsev
In the upper half-plane, the classical solution and correctness criterion of the Goursat problem for a linear inhomogeneous adjoint model telegraph equation with variable rate a(s,t) are found explicitly. An explicit formula is obtained for the classical solution of this Goursat problem, unique and stable with respect to the right hand side of the equation and Goursat data. This formula contains implicit characteristic functions of the equation. In the case of a homogeneous conjugate model telegraph equation, the classical solution of this Goursat problem is the Riemann function in all linear mixed (initial-boundary) problems for an inhomogeneous model telegraph equation with variable rate a(s,t). This Riemann function has been calculated by us. A correctness criterion according to Hadamard (necessary and sufficient conditions) of its unique and stable on the right-hand side of the equation and the Goursat data solvability is found. This criterion consists of smoothness requirements on the righthand side of the equation and two Goursat data. The smoothness requirements on the right side of the equation are the condition of continuity of the right-side and the corresponding integral smoothness conditions on the right side of the equation and on the Goursat data – their twice continuous differentiability in the upper half-plane.
{"title":"GOURSAT PROBLEM FOR THE ADJOINT MODEL TELEGRAPH EQUATION WITH THE RATE a(s, t) IN THE UPPER HALF-PLANE","authors":"F. Lomovtsev","doi":"10.52928/2070-1624-2022-38-4-92-102","DOIUrl":"https://doi.org/10.52928/2070-1624-2022-38-4-92-102","url":null,"abstract":"In the upper half-plane, the classical solution and correctness criterion of the Goursat problem for a linear inhomogeneous adjoint model telegraph equation with variable rate a(s,t) are found explicitly. An explicit formula is obtained for the classical solution of this Goursat problem, unique and stable with respect to the right hand side of the equation and Goursat data. This formula contains implicit characteristic functions of the equation. In the case of a homogeneous conjugate model telegraph equation, the classical solution of this Goursat problem is the Riemann function in all linear mixed (initial-boundary) problems for an inhomogeneous model telegraph equation with variable rate a(s,t). This Riemann function has been calculated by us. A correctness criterion according to Hadamard (necessary and sufficient conditions) of its unique and stable on the right-hand side of the equation and the Goursat data solvability is found. This criterion consists of smoothness requirements on the righthand side of the equation and two Goursat data. The smoothness requirements on the right side of the equation are the condition of continuity of the right-side and the corresponding integral smoothness conditions on the right side of the equation and on the Goursat data – their twice continuous differentiability in the upper half-plane.","PeriodicalId":386243,"journal":{"name":"HERALD OF POLOTSK STATE UNIVERSITY. Series С FUNDAMENTAL SCIENCES","volume":"3 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116928850","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 : 2022-05-12DOI: 10.52928/2070-1624-2022-38-4-81-91
V. Yanushkevich, S. Alieva, S. Kalintsev
The article studies the characteristics of an anisotropic medium over hydrocarbons with the complex use of electromagnetic geo-exploration methods. The simulation of the components of dielectric permittivity tensors in the mode of amplitude-modulated, frequency-modulated, amplitude-frequency-modulated and radio pulse signals is carried out. The frequencies of the electron plasma and electron cyclotron resonances for the specified regimes are established. A study was made of the influence of modes of probing signals on the characteristics of an anisotropic medium above deposits and the components of the dielectric tensor. The effect of particle concentration variation on the real components of the components of the dielectric permittivity of an anisotropic medium above the UVZ is analyzed. Recommendations are given for improving the methods of electrical exploration and their application for prospecting geophysics.
{"title":"ELECTROMAGNETIC METHODS OF SEARCHING AND DEFINITION OF HYDROCARBON DEPOSITS","authors":"V. Yanushkevich, S. Alieva, S. Kalintsev","doi":"10.52928/2070-1624-2022-38-4-81-91","DOIUrl":"https://doi.org/10.52928/2070-1624-2022-38-4-81-91","url":null,"abstract":"The article studies the characteristics of an anisotropic medium over hydrocarbons with the complex use of electromagnetic geo-exploration methods. The simulation of the components of dielectric permittivity tensors in the mode of amplitude-modulated, frequency-modulated, amplitude-frequency-modulated and radio pulse signals is carried out. The frequencies of the electron plasma and electron cyclotron resonances for the specified regimes are established. A study was made of the influence of modes of probing signals on the characteristics of an anisotropic medium above deposits and the components of the dielectric tensor. The effect of particle concentration variation on the real components of the components of the dielectric permittivity of an anisotropic medium above the UVZ is analyzed. Recommendations are given for improving the methods of electrical exploration and their application for prospecting geophysics.","PeriodicalId":386243,"journal":{"name":"HERALD OF POLOTSK STATE UNIVERSITY. Series С FUNDAMENTAL SCIENCES","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126235057","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 : 2022-05-12DOI: 10.52928/2070-1624-2022-38-4-43-48
V. Bogush, V. Rodionova, O. Tanana
An electrodynamic simulation of a device for coupling a cavity resonator with a path is performed. The cavity coupling device is a distributed communication line, i.e. associated with both the magnetic and electric fields of the resonator, and makes it possible to obtain a coupling that depends little on the frequency. An algorithm for approximating the values of the input impedance from the resistance of the coupling element has been developed in order to calculate the set of characteristics of the loaded resonator. The performed calculations and the obtained dependences make it possible to determine the geometrical parameters of the design of a broadband cavity resonator coupling device in the microwave range of wavelengths.
{"title":"SIMULATION OF PARAMETERS OF A COUPLING DEVICE \u0000OF A MEASURING RESONATOR WITH A MICROWAVE PATH","authors":"V. Bogush, V. Rodionova, O. Tanana","doi":"10.52928/2070-1624-2022-38-4-43-48","DOIUrl":"https://doi.org/10.52928/2070-1624-2022-38-4-43-48","url":null,"abstract":"An electrodynamic simulation of a device for coupling a cavity resonator with a path is performed. The cavity coupling device is a distributed communication line, i.e. associated with both the magnetic and electric fields of the resonator, and makes it possible to obtain a coupling that depends little on the frequency. An algorithm for approximating the values of the input impedance from the resistance of the coupling element has been developed in order to calculate the set of characteristics of the loaded resonator. The performed calculations and the obtained dependences make it possible to determine the geometrical parameters of the design of a broadband cavity resonator coupling device in the microwave range of wavelengths.","PeriodicalId":386243,"journal":{"name":"HERALD OF POLOTSK STATE UNIVERSITY. Series С FUNDAMENTAL SCIENCES","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122307065","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 : 2022-05-12DOI: 10.52928/2070-1624-2022-38-4-49-55
S. Vabishchevich, N. Vabishchevich, D. Brinkevich, V. Prosolovich, V. Kolos, O. Zubova
The adhesion and strength properties of NFR 016b4 photoresist (PR) films for explosive lithography deposited on the surface of KDB-10 single-crystal silicon wafers by centrifugation have been studied. It has been found that they behave like brittle materials. The FR microhardness measured at low loads was ~0,3 GPa, decreasing slightly with increasing film thickness. The crack resistance parameters (fracture toughness coefficient K1С and effective fracture energy γ) at low loads do not depend on the film thickness. With increasing load, the crack resistance of a thin film increased faster than that of a thick one. The specific peeling energy G under normal loading was ~1,2 J/m2 for thick and ~0,7 J/m2 for thin films. The higher values of G for thick films are most likely due to the compensation of elastic stress fields arising at the photoresist/silicon interface. The strength properties of NFR 016b4 explosive lithography photoresist and FP9120 positive diazoquinone-novolac photoresist are compared.
{"title":"STRENGTH PROPERTIES OF PHOTORESISTS FOR EXPLOSIVE LITHOGRAPHY","authors":"S. Vabishchevich, N. Vabishchevich, D. Brinkevich, V. Prosolovich, V. Kolos, O. Zubova","doi":"10.52928/2070-1624-2022-38-4-49-55","DOIUrl":"https://doi.org/10.52928/2070-1624-2022-38-4-49-55","url":null,"abstract":"The adhesion and strength properties of NFR 016b4 photoresist (PR) films for explosive lithography deposited on the surface of KDB-10 single-crystal silicon wafers by centrifugation have been studied. It has been found that they behave like brittle materials. The FR microhardness measured at low loads was ~0,3 GPa, decreasing slightly with increasing film thickness. The crack resistance parameters (fracture toughness coefficient K1С and effective fracture energy γ) at low loads do not depend on the film thickness. With increasing load, the crack resistance of a thin film increased faster than that of a thick one. The specific peeling energy G under normal loading was ~1,2 J/m2 for thick and ~0,7 J/m2 for thin films. The higher values of G for thick films are most likely due to the compensation of elastic stress fields arising at the photoresist/silicon interface. The strength properties of NFR 016b4 explosive lithography photoresist and FP9120 positive diazoquinone-novolac photoresist are compared.","PeriodicalId":386243,"journal":{"name":"HERALD OF POLOTSK STATE UNIVERSITY. Series С FUNDAMENTAL SCIENCES","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115468880","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：