2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS)最新文献_第8页

Methodology of Computer Simulation of Lightning Electromagnetic Phenomena Action on the Elements of the Spaceport 计算机模拟雷电电磁现象对航天发射场部件的作用的方法学

2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS) Pub Date : 2018-09-01 DOI: 10.1109/uwbusis.2018.8520165

V. Kniaziev, S. Melnik

{"title":"Methodology of Computer Simulation of Lightning Electromagnetic Phenomena Action on the Elements of the Spaceport","authors":"V. Kniaziev, S. Melnik","doi":"10.1109/uwbusis.2018.8520165","DOIUrl":"https://doi.org/10.1109/uwbusis.2018.8520165","url":null,"abstract":"Materials presented in the paper are part of the work to create a universal method for modeling and optimizing lightning protection systems for spaceport. In this regard, special attention is paid to the analysis of existing techniques for calculating zones of a probable lightning strike and their compliance with standards. Specificity of the task and features of the lightning protection system made it possible to generalize this data and propose an optimal technique for calculating such zones. At the same time, the possibilities of numerical modeling of physical processes provided by the specialized software modules were used to the fullest extent possible. At the second stage of the work, the degree of destabilizing effect of a direct lightning strike in the body of a launch vehicle was assessed, as well as the effect of an electromagnetic field caused by a lightning strike into the elements of the lightning protection system of the spaceport. Taking into account the specific nature of the problem and the features of the lightning protection system, a new method for calculating the destabilizing effect of a lightning strike is proposed. Its difference from alternative methods is to more accurately simulate the dynamics of current propagation and the fields it induces in conductive structures when exposed to a lightning pulse of various shapes. The results of modeling and calculation presented in the presentation should be considered as an illustration of the application of the developed methodology.","PeriodicalId":167305,"journal":{"name":"2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131059225","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

Invariant methods of wideband acoustic signals detection and target localization 宽带声信号检测与目标定位的不变性方法

2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS) Pub Date : 2018-09-01 DOI: 10.1109/UWBUSIS.2018.8554192

R. Sinitsyn, F. Yanovsky, Yevhen Chervoniak, V. Makarenko, V. Tokarev, O. Zaporozhets, Nadiia Sinitsyna

引用次数: 0

Pulse Signal Propagation in Bragg-Type Layered Structures 脉冲信号在bragg型层状结构中的传播

2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS) Pub Date : 2018-09-01 DOI: 10.1109/UWBUSIS.2018.8520009

M. Andreev, V. Borulko, O. Drobakhin

引用次数: 1

Characteristics of Wave Processes in the Ionosphere Over Kharkiv During Solar Eclipse of 20 March 2015 2015年3月20日日食期间哈尔科夫上空电离层波过程特征

2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS) Pub Date : 2018-09-01 DOI: 10.1109/UWBUSIS.2018.8519995

S. Panasenko, L. Chernogor, Oleg V. Lazorenko

引用次数: 0

Time Domain Modelling of Pulse Wave Scattering on Small Metal Spheres 脉冲波在小金属球上散射的时域建模

2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS) Pub Date : 2018-09-01 DOI: 10.1109/UWBUSIS.2018.8519976

A. Butrym, Hao Yu

引用次数: 0

Effect of Coaxial Balun Transformer on Characteristics of the Compact Loop Antenna With Controllable Polarization 同轴平衡变压器对可控极化紧凑环形天线特性的影响

2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS) Pub Date : 2018-09-01 DOI: 10.1109/UWBUSIS.2018.8520237

Uladzimir. V. Keda

引用次数: 1

Complex Algorithm of Image Wavelet Compression: Distortion Evaluation in the Light of Trade of Contour Separation and Compression Ratio 图像小波压缩的复合算法:基于轮廓分离和压缩比的失真评价

2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS) Pub Date : 2018-09-01 DOI: 10.1109/UWBUSIS.2018.8520013

O. Gofaizen, O. Osharovska, V. Pyliavskyi, M. Patlayenko

{"title":"Complex Algorithm of Image Wavelet Compression: Distortion Evaluation in the Light of Trade of Contour Separation and Compression Ratio","authors":"O. Gofaizen, O. Osharovska, V. Pyliavskyi, M. Patlayenko","doi":"10.1109/UWBUSIS.2018.8520013","DOIUrl":"https://doi.org/10.1109/UWBUSIS.2018.8520013","url":null,"abstract":"The paper presents the results of estimating image distortions inherent for compression algorithms based on the complex implementation of wavelet coding taking into account the tradeoff between the degree of compression and the transmission of texture. Estimations of the level of distortion of image contours are given depending on the detail and texture characteristics on large areas of the image with a smooth brightness variation. The choice of test images containing low-contrast textures with different levels of medium brightness is justified. As a measure of the distortion between the original and the decoded image, the ratio of the peak value of the signal to the average noise value at the boundary of the contours of objects in the image is selected. The boundaries were detected by a gradient method. Compression factors are calculated for varying the thresholds of the restriction of the spectral components at different levels of the wavelet decomposition. A variant of the frequency-dependent restriction of the spectral components is proposed, which is determined for each of the subbands. Appropriate values of the compression ratio for the coding method based on the prediction of bit planes for a given set of images are presented.","PeriodicalId":167305,"journal":{"name":"2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS)","volume":"180 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134172384","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: 1

Operator Method in Diffraction by Layered Graphene Grating 层状石墨烯光栅衍射中的算子法

2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS) Pub Date : 2018-09-01 DOI: 10.1109/UWBUSIS.2018.8520222

M. Kaliberda, S. Pogarsky, Tatiana Ilina, L. Lytvynenko

引用次数: 0

Electromagnetic Scattering for Complex Shape Objects with and without Cloaking 有或没有隐形的复杂形状物体的电磁散射

2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS) Pub Date : 2018-09-01 DOI: 10.1109/UWBUSIS.2018.8520257

V. Khrychov, M. Legenkiy

引用次数: 4

3D Shape Reconstruction Method for Multiple Aspects Using MIMO IR-UWB Radar System 基于MIMO IR-UWB雷达系统的多方位三维形状重建方法

2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS) Pub Date : 2018-09-01 DOI: 10.1109/UWBUSIS.2018.8520235

Dingyang Wang, Seong Kyu Leem, S. Cho

{"title":"3D Shape Reconstruction Method for Multiple Aspects Using MIMO IR-UWB Radar System","authors":"Dingyang Wang, Seong Kyu Leem, S. Cho","doi":"10.1109/UWBUSIS.2018.8520235","DOIUrl":"https://doi.org/10.1109/UWBUSIS.2018.8520235","url":null,"abstract":"In this paper, we propose a new three-dimensional (3-D) shape reconstruction method for multiple aspects under sparse array topology and small fractional bandwidth of commercial radar chip in two-dimensional (2-D) multiple-input-multiple-output (MIMO) impulse radio ultra-wideband (IR-UWB) array imaging system. The shape reconstruction method is based on delay-and-sum (DAS) algorithm, enables short range imaging in a particular environment. The images of the multiple aspects of the target are obtained by superimposing the data calculated at different positions. The experiment was performed on several targets with different shapes under a sparse cross array topology with an antenna spacing of 2.5 lambda and a commercial IR-UWB radar chip with a fractional bandwidth of 34%. According to the experimental results, the 3-D shape of multiple aspects of the target can be reconstructed and provide more information than imaging one aspect. Therefore, the results of this paper show that the more complex shape of the target can be reconstructed by using the proposed method. Furthermore, the method may be used in inspection applications to help make judgments in the future.","PeriodicalId":167305,"journal":{"name":"2018 9th International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122091086","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