发布求助
文献互助 智能选刊 最新文献

Physics of Wave Processes and Radio Systems最新文献

筛选
英文 中文
Iterative algorithm for offsets, scale and rotate estimation for television image superposition with additive and multiplicative noise 具有加性和乘性噪声的电视图像叠加中偏移、尺度和旋转估计的迭代算法
Physics of Wave Processes and Radio Systems Pub Date : 2022-03-29 DOI: 10.18469/1810-3189.2022.25.1.36-44
R. Diyazitdinov
{"title":"Iterative algorithm for offsets, scale and rotate estimation for television image superposition with additive and multiplicative noise","authors":"R. Diyazitdinov","doi":"10.18469/1810-3189.2022.25.1.36-44","DOIUrl":"https://doi.org/10.18469/1810-3189.2022.25.1.36-44","url":null,"abstract":"We describe the iterative algorithm for television image superposition. The superposition is defined by offsets, scale, and rotates. Also additive and multiplicative noise influences the image. The main aim of developing this algorithm is to reduce the time of processing images for estimation superposition parameters. Reducing processing time is provided by reducing the set of reference points, which defines the superposition. The initial coordinate of the reference points is refined at the process of the algorithm work for acceptable superposition of the television images. The superposition parameters are divided into two groups. Offsets belong to the first group, scale and rotate belong to the second group. The parameters in each group are estimated independently. The iterative procedure uses the offsets for estimation scale and rotate, and after it uses scale and rotates for estimation of the offsets. This process is repeated. The next iteration approximates the rate to the real value of the superposition parameters. The developed algorithm allows reducing processing time at 25 times faster than the brute force algorithm for the test data. The test data include two images; the first image has the resolution 288 384 pixels, the second image has the resolution 128 128 pixels. The second image is the fragment of the first image. Also at the end of the article, the numerical simulation had been presented. The simulation shows the dependences of error estimation of parameters from the noise power.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132661775","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
Software development for implementing a model of porous structures based on three periodic surfaces 实现基于三个周期表面的多孔结构模型的软件开发
Physics of Wave Processes and Radio Systems Pub Date : 2022-03-29 DOI: 10.18469/1810-3189.2022.25.1.71-79
Mikhail I. Smolkov, A. Krutov
{"title":"Software development for implementing a model of porous structures based on three periodic surfaces","authors":"Mikhail I. Smolkov, A. Krutov","doi":"10.18469/1810-3189.2022.25.1.71-79","DOIUrl":"https://doi.org/10.18469/1810-3189.2022.25.1.71-79","url":null,"abstract":"Based on the original algorithm for generating three periodic surfaces implemented in the ToposPro information and analytical system, a mathematical model of a porous material was developed. The TPS Extractor software for the computer implementation of this model was developed. This software implements original algorithms for triangulation, translation, smoothing, and model solidifying. The developed triangulation algorithms were used to construct a set of three periodic surfaces, and models of the corresponding porous materials were built on their basis. Based on models of porous materials, a study of the performance of smoothing and translation algorithms was conducted. Using a solidifying algorithm for increasing the model thickness, models of porous material were created that are suitable for 3D printing. Also, samples of porous models were printed out using fused deposition modeling technology.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130731262","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
Non-equilibrium cooling and heating of an MBBA liquid crystal at the first-order phase transition in a long cell 长晶胞中一阶相变时MBBA液晶的非平衡冷却和加热
Physics of Wave Processes and Radio Systems Pub Date : 2022-03-29 DOI: 10.18469/1810-3189.2022.25.1.65-70
V. Kazakevich, I. L. Klyukach, Gennady A. Mordovin
{"title":"Non-equilibrium cooling and heating of an MBBA liquid crystal at the first-order phase transition in a long cell","authors":"V. Kazakevich, I. L. Klyukach, Gennady A. Mordovin","doi":"10.18469/1810-3189.2022.25.1.65-70","DOIUrl":"https://doi.org/10.18469/1810-3189.2022.25.1.65-70","url":null,"abstract":"The first-order phase transition of an MBBA nematic liquid crystal with benzene impurity has been studied by the critical opalescence method at a large cell thickness. Opalescence has been observed at two critical transition points. The spatial transverse parameters of the domains are determined from the Fraunhofer diffraction. The hypothesis about the longitudinal correlation parameter of domains is equal to the cell length has been proposed.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"218 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128822248","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
The dynamics of synchronization of two-stage van der Pol generator 两级范德波发生器同步动力学
Physics of Wave Processes and Radio Systems Pub Date : 2021-11-18 DOI: 10.18469/1810-3189.2021.24.3.56-62
V. Zaitsev, A. Karlov
{"title":"The dynamics of synchronization of two-stage van der Pol generator","authors":"V. Zaitsev, A. Karlov","doi":"10.18469/1810-3189.2021.24.3.56-62","DOIUrl":"https://doi.org/10.18469/1810-3189.2021.24.3.56-62","url":null,"abstract":"Results of numerical simulation of self-oscillations synchronization process in two-cascade ring generator van der Pol by harmonic signal are presented. Studies were carried out within the framework of the DT- model of the dynamic system. The model was developed on the basis of the principle of compliance within the framework of the method of slowly changing amplitudes of characteristics of a discrete system with characteristics of an analog prototype. Shortened equations for complex oscillation amplitudes in generator stages are obtained. It was found that in an autonomous system there is an effect of bistability of amplitudes. In the synchronization mode with an external harmonic signal, solutions of shortened equations made it possible to calculate amplitude-frequency and phase-frequency characteristics of synchronous oscillations. It is shown that transitions between bistable states are observed in the synchronous oscillation holding band. Differences of frequency characteristics of synchronization of classical and two-stage oscillators van der Pol were analyzed.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128965628","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
Parametrical synthesis of radio devices with the set quantity of identical cascades for variants of inclusion of jet two-port networks between a source of a signal and a nonlinear part 具有一定数量的相同级联的无线电设备的参数综合，用于在信号源和非线性部分之间包含射流双端口网络的变体
Physics of Wave Processes and Radio Systems Pub Date : 2021-11-18 DOI: 10.18469/1810-3189.2021.24.3.46-55
A. A. Golovkov, A. V. Fomin
{"title":"Parametrical synthesis of radio devices with the set quantity of identical cascades for variants of inclusion of jet two-port networks between a source of a signal and a nonlinear part","authors":"A. A. Golovkov, A. V. Fomin","doi":"10.18469/1810-3189.2021.24.3.46-55","DOIUrl":"https://doi.org/10.18469/1810-3189.2021.24.3.46-55","url":null,"abstract":"The algorithm of parametrical synthesis of various radio devices with any quantity of cascades of type the jet two-port network a nonlinear part by criterion of maintenance of the set frequency characteristics is developed. Nonlinear parts are presented in the form of a nonlinear element and parallel either consecutive on a current or pressure of a feedback. According to this criterion systems of the algebraic equations are generated and solved. Models of optimum two-port networks in the form of mathematical expressions for definition of interrelations between elements of their classical matrix of transfer and for search of dependences of resistance of two-poles from frequency are as a result received. It is shown, that frequency characteristics of investigated radio devices from identical cascades are identical or similar to frequency characteristics of radio devices from one cascade, but with resistance of a source of a signal and the loading, changed definitely. Such schemes are named by equivalent. The comparative analysis of the theoretical results received by mathematical modelling in system MathCad, and the experimental results received by circuit simulation in systems OrCad and MicroCap, shows their satisfactory coincidence.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114652121","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: 2
Parametrical synthesis of radio devices with the set quantity of unequal cascades for variants of inclusion of jet two-port networks between a nonlinear part and loading 非线性部件与载荷之间包含射流双端口网络的变型，具有一定数量不等级联的无线电装置的参数综合
Physics of Wave Processes and Radio Systems Pub Date : 2021-11-18 DOI: 10.18469/1810-3189.2021.24.3.63-70
A. A. Golovkov, V. Golovkov, A. V. Fomin
{"title":"Parametrical synthesis of radio devices with the set quantity of unequal cascades for variants of inclusion of jet two-port networks between a nonlinear part and loading","authors":"A. A. Golovkov, V. Golovkov, A. V. Fomin","doi":"10.18469/1810-3189.2021.24.3.63-70","DOIUrl":"https://doi.org/10.18469/1810-3189.2021.24.3.63-70","url":null,"abstract":"The algorithm of parametrical synthesis of various radio devices with any quantity of cascades of type a nonlinear part the jet two-port network by criterion of maintenance of the set frequency characteristics is developed. Nonlinear parts are presented in the form of a nonlinear element and parallel either consecutive on a current or pressure of a feedback. According to this criterion systems of the algebraic equations are generated and solved. Models of optimum two-port networks of one of cascades in the form of mathematical expressions for definition of interrelations between elements of their classical matrix of transfer and for search of dependences of resistance of two-poles from frequency are as a result received. It is spent mathematical and circuit simulation of the two-cascade amplifier. It is shown, that the increase in quantity of cascades with the optimised parametres leads to substantial growth of a working strip of frequencies. The comparative analysis of the theoretical results received by mathematical modelling in system MathCad, and the experimental results received by circuit simulation in systems OrCad and MicroCap, shows their satisfactory coincidence.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125679061","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: 2
Method for determining the authenticity of a document based on computer colorimetry 基于计算机比色法确定文件真伪的方法
Physics of Wave Processes and Radio Systems Pub Date : 2021-11-18 DOI: 10.18469/1810-3189.2021.24.3.111-116
L. D. Lozhkin, Alexandr A. Kuzmenko
{"title":"Method for determining the authenticity of a document based on computer colorimetry","authors":"L. D. Lozhkin, Alexandr A. Kuzmenko","doi":"10.18469/1810-3189.2021.24.3.111-116","DOIUrl":"https://doi.org/10.18469/1810-3189.2021.24.3.111-116","url":null,"abstract":"Determining the authenticity of documents is an important task when conducting investigative measures. In practice, for the examination of documents to determine the prescription of their creation, a spectral method is used, in which it is necessary to make clippings from the document under study, which leads to damage to the document under study, and also requires the use of expensive equipment, which affects the price of the examination of the document. The article describes a method for determining the authenticity of a document based on computer colorimetry, which does not require expensive equipment for conducting an examination. This method for determining the authenticity of a document uses a change in the color of the strokes of a ballpoint pen over time, which is caused by the drying of the solvent in the ink of the pen, and also lacks the disadvantage of the need to damage the document under study.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127817802","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
Mathematical model of a communication channel with an unmanned aerial vehicle 无人机通信信道的数学模型
Physics of Wave Processes and Radio Systems Pub Date : 2021-11-18 DOI: 10.18469/1810-3189.2021.24.3.71-79
N. S. Arkhipov, I. Polyansky, Y. Yakovlev, A. V. Subbotenko
{"title":"Mathematical model of a communication channel with an unmanned aerial vehicle","authors":"N. S. Arkhipov, I. Polyansky, Y. Yakovlev, A. V. Subbotenko","doi":"10.18469/1810-3189.2021.24.3.71-79","DOIUrl":"https://doi.org/10.18469/1810-3189.2021.24.3.71-79","url":null,"abstract":"In this paper, a mathematical model of a communication channel with an unmanned aerial vehicle and taking into account the specifics of the locations of a ground communication point when determining the effects of refraction, diffraction and interference of electromagnetic waves is proposed. A meaningful statement of the problem based on the mathematical relationship between the energy parameters of the first transmission equation and the quality indicators (BER) of the second transmission equation has been formed. The main features of calculating the parameters of the first equation are to determine the rules for calculating the level of attenuation due to the influence of the earths surface. The calculation of attenuations for cases of removal of an unmanned aerial vehicle from a ground communication point within the areas of line of sight, partial shade and shadow has been clarified. The second transmission equation is based on the mathematical model of the Rice communication channel. With respect to the energy parameters and the selected communication quality indicator for the formed mathematical model, examples of graphical dependencies are given in the study of typical computational problems. With respect to the energy parameters and the selected communication quality indicator for the formed mathematical model, examples of graphical dependencies in the study of typical computational problems are given.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132077092","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
Refinement of the method for selecting the width of the conductor of printed circuit boards on a metal base, working in the absence of convection 改进了在没有对流的情况下，在金属底座上选择印刷电路板导体宽度的方法
Physics of Wave Processes and Radio Systems Pub Date : 2021-11-18 DOI: 10.18469/1810-3189.2021.24.3.80-91
A. Kostin
{"title":"Refinement of the method for selecting the width of the conductor of printed circuit boards on a metal base, working in the absence of convection","authors":"A. Kostin","doi":"10.18469/1810-3189.2021.24.3.80-91","DOIUrl":"https://doi.org/10.18469/1810-3189.2021.24.3.80-91","url":null,"abstract":"The article proposes a refined method for calculating the width of the conductors of printed circuit boards on a metal base for the onboard devices of spacecraft, depending on the current flowing. The constructed refined mathematical model of the process of conductive heat exchange between the conductors and the metal base is described. The results of calculations of various, most common, locations of layers of printed circuit boards are presented. An analysis was carried out and a refined methodology was developed based on the results obtained. It allows you to easily (without complicate calculations) calculate the necessary values of the width of conductors. This technique is based on graphical methods, but allows you to perform technical calculations with sufficient accuracy. Accuracy is achieved by using special formulas that simplify the determination of the value of a physical quantity on a logarithmic scale. The disadvantages of the proposed method are indicated.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"60 24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126025491","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
Investigation of CIE color spaces for differences in color differentiation thresholds in different regions of the color locus 色彩轨迹不同区域色彩分化阈值差异的CIE色彩空间研究
Physics of Wave Processes and Radio Systems Pub Date : 2021-11-18 DOI: 10.18469/1810-3189.2021.24.3.107-110
L. D. Lozhkin, Alexandr A. Kuzmenko
{"title":"Investigation of CIE color spaces for differences in color differentiation thresholds in different regions of the color locus","authors":"L. D. Lozhkin, Alexandr A. Kuzmenko","doi":"10.18469/1810-3189.2021.24.3.107-110","DOIUrl":"https://doi.org/10.18469/1810-3189.2021.24.3.107-110","url":null,"abstract":"The equidistance of the color space plays a significant role in determining the color difference in color transmission systems. Strictly equal contrasting color spaces can be considered only those color spaces in which equal changes in the visual perception of color are provided with an equal change in the color coordinates in this color space. Currently, the International Commission on Lighting (CIE) has adopted a number of color spaces called equal-contrast. The article presents the results of the study of color spaces adopted by CIE for equal contrast, i.e. on the differences in the thresholds of color differentiation in different areas of the color locus. The article investigated such color spaces as CIE 1931 (RGB), CIE 1931 (x, y), CIE 1960 (u, v), CIE 1976 (u*, v*), CIE LAB (a*, b*).","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126697637","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信