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Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory最新文献

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Wiener-Hopf analysis of the elastic wave diffraction by the finite crack located at the plane interface between the elastic isotropic half-space medium 弹性各向同性半空间介质平面界面处有限裂纹弹性波衍射的Wiener-Hopf分析
Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 1900-01-01 DOI: 10.1109/diped.2005.201602
D. Kuryliak, M. Voytko
{"title":"Wiener-Hopf analysis of the elastic wave diffraction by the finite crack located at the plane interface between the elastic isotropic half-space medium","authors":"D. Kuryliak, M. Voytko","doi":"10.1109/diped.2005.201602","DOIUrl":"https://doi.org/10.1109/diped.2005.201602","url":null,"abstract":"In this paper we have analyzed the SH elastic wave diffraction by the finite crack located at the plane interface between two perfectly welded materials rigorously. The incident field is taken as a plane wave. Introducing the Fourier transform of the scattered field and applying boundary conditions in the transform domain, the problem is formulated in the terms of the Wiener-Hopf equation. An approximate solution of such equation is proposed and numerical calculation examples for displacement patterns are also analyzed.","PeriodicalId":169377,"journal":{"name":"Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132216954","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
Qualitative analysis of precise frequency multiplier of harmonic oscillations 谐波精密倍频器的定性分析
Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 1900-01-01 DOI: 10.1109/DIPED.2005.201611
P. Tymoshchuk, M. Lobur
{"title":"Qualitative analysis of precise frequency multiplier of harmonic oscillations","authors":"P. Tymoshchuk, M. Lobur","doi":"10.1109/DIPED.2005.201611","DOIUrl":"https://doi.org/10.1109/DIPED.2005.201611","url":null,"abstract":"Stability of discrete algorithm of precise frequency multiplier is investigated. It is shown analytically that the algorithm of frequency multiplier is numerically stable one if the step of discretization satisfies certain constraints. A sensitivity of output signals of frequency multiplier model to parameters values change by direct evaluations of output signals deviations depending on model parameters variations from desired values is analysed by numerical method. It is obtained that the multipliers should have high precision values of parameters that can be guaranteed by modern hardware, specifically built on logarithmic circuits. A comparison with existing analogs has been made. Simulation example and the corresponding results are also provided.","PeriodicalId":169377,"journal":{"name":"Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"45 42","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133783200","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
Scattering of H-polarized electromagnetic wave by a dihedral wedge with a solid cylinder with a sectoral groove at the apex 顶点有扇形槽的圆柱体二面体楔对h极化电磁波的散射
Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 1900-01-01 DOI: 10.1109/DIPED.2005.201593
Y. Shepilko
{"title":"Scattering of H-polarized electromagnetic wave by a dihedral wedge with a solid cylinder with a sectoral groove at the apex","authors":"Y. Shepilko","doi":"10.1109/DIPED.2005.201593","DOIUrl":"https://doi.org/10.1109/DIPED.2005.201593","url":null,"abstract":"The rigorous solution of the problem is presented. Relying upon completeness of angular functions on the respective intervals the boundary-value method is applied. SFF and BRCS of the structure are evaluated asymptotically. The scattered field characteristics are analyzed numerically with controlled precision. Shown that BRCS as function of incident wave length exhibits oscillating character, with sectoral groove presence having significant effect on the shape of the resulting radiation-pattern which also varies with the sector opening angle.","PeriodicalId":169377,"journal":{"name":"Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"415 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124814786","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
Spectral characteristics of wave process in circular cylinder rotated in acoustical medium with a non- constant angular velocity 非恒定角速度声介质中旋转圆柱波过程的频谱特性
Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 1900-01-01 DOI: 10.1109/diped.2005.201620
O. Piddubniak, N. Piddubniak
{"title":"Spectral characteristics of wave process in circular cylinder rotated in acoustical medium with a non- constant angular velocity","authors":"O. Piddubniak, N. Piddubniak","doi":"10.1109/diped.2005.201620","DOIUrl":"https://doi.org/10.1109/diped.2005.201620","url":null,"abstract":"The plane strain of an elastic circular cylinder of infinite length rotated about its axis with a non-uniform angular velocity in an ideal compressible non-viscous fluid (gas) is studied. The spectral characteristics for the elastic displacement and stresses for the case of the Armco iron cylinder immersed in the water are analyzed.","PeriodicalId":169377,"journal":{"name":"Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128020248","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: 3
Microstrip array in open resonator 开式谐振腔微带阵列
Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 1900-01-01 DOI: 10.1109/DIPED.2005.201586
A. V. Archipov, I. Kuzmichev, I. Reznik, D. G. Seleznyov
{"title":"Microstrip array in open resonator","authors":"A. V. Archipov, I. Kuzmichev, I. Reznik, D. G. Seleznyov","doi":"10.1109/DIPED.2005.201586","DOIUrl":"https://doi.org/10.1109/DIPED.2005.201586","url":null,"abstract":"Possibility of excitation of the lowest mode oscillations in a semi-symmetric open resonator (OR) using 4 element microstrip array (MSA) is examined. MSA properties at 10 GHz frequency are calculated. Experimental curves of loaded Q-quality and resonant gain as a function of distance between the mirrors of the OR, excited by the MSA, and an aperture coupling component are shown. Promising application of the MSA in creating active high-Q quasi-optic wave generator in the millimeter (mm) range is shown. The aim of this paper is the calculation and analysis of the electrodynamical characteristics of an OR with MSA, consisting of four identical rectangular patches excited in phase.","PeriodicalId":169377,"journal":{"name":"Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126597497","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
About one bilateral approximation method of determination of the branching points of nonlinear integral equation arising in the theory of antennas synthesis 关于天线综合理论中非线性积分方程分支点确定的一种双边逼近方法
Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 1900-01-01 DOI: 10.1109/DIPED.2005.201599
B. Podlevskyi
{"title":"About one bilateral approximation method of determination of the branching points of nonlinear integral equation arising in the theory of antennas synthesis","authors":"B. Podlevskyi","doi":"10.1109/DIPED.2005.201599","DOIUrl":"https://doi.org/10.1109/DIPED.2005.201599","url":null,"abstract":"The problem of construction of numerical bilateral approximation for determination of branching points of one nonlinear integral operator, arising in the theory of antennas synthesis according to the given amplitude directivity pattern, is considered. The basic difficulty consists in that the kernel of integral operator nonlinearly depends on the parameter, which play role of the spectral one. Thus the problem is reduced to a nonlinear eigenvalue problem with application the technique of the alternating approximations of eigenvalues. The technique is based on a generalization of the known Rayleigh ratio for iinear problem onto nonlinear (initial and some auxiliary) eigenvalue problems. These generalized Rayleigh ratioes are used for constructing an iterative process of alternating eigenvalue approximations.","PeriodicalId":169377,"journal":{"name":"Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115598185","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
Construction of boundary operators for the laplacian. 11. Using of double layer potential 拉普拉斯算子的边界算子构造。11. 双层电势的使用
Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 1900-01-01 DOI: 10.1109/DIPED.2005.201600
A. D. Polishchuk
{"title":"Construction of boundary operators for the laplacian. 11. Using of double layer potential","authors":"A. D. Polishchuk","doi":"10.1109/DIPED.2005.201600","DOIUrl":"https://doi.org/10.1109/DIPED.2005.201600","url":null,"abstract":"I. Functional space Kr Let G be a bounded open C1 -set [I] in 23 the boundary of which is -smooth surface We write G= R3 U and introduce [2] on G, GC Sobolev spaces w2(c and ,, W (G') u e DLY(G'): u r, DUe c LjG),wee i o1)oeV paeS p2 (G) 2(lo } G1' t)I,t DXEt G) h re ts the distance of the point X E G' to the coordinate origin 0 and the space W2 (f) Introduce the space H' = 4(G) xW'(G') the elements of whlich we write as","PeriodicalId":169377,"journal":{"name":"Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132680403","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: 12
Electromagnetic field in rectangular waveguide with magnetized fractal ferrite plate 磁化分形铁氧体板矩形波导中的电磁场
Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 1900-01-01 DOI: 10.1109/DIPED.2005.201594
A. Misyura, V. Onufriyenko
{"title":"Electromagnetic field in rectangular waveguide with magnetized fractal ferrite plate","authors":"A. Misyura, V. Onufriyenko","doi":"10.1109/DIPED.2005.201594","DOIUrl":"https://doi.org/10.1109/DIPED.2005.201594","url":null,"abstract":"The investigation results of electromagnetic field in rectangular waveguide with cross magnetized fractal ferrite plate have been showed. The apparatus of fractional integro-differential calculus has been used to find /spl alpha/ characteristics of the field components in presented medium. The dependence of transversal and longitudinal field components on values of scaling index which characterizes the degree of fractal ferrite filling has been determined.","PeriodicalId":169377,"journal":{"name":"Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125762974","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
Numerical solution of an integral equation for electromagnetic field in conductive medium with crack 含裂纹导电介质中电磁场积分方程的数值解
Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 1900-01-01 DOI: 10.1109/DIPED.2005.201587
Y. V. Datsko
{"title":"Numerical solution of an integral equation for electromagnetic field in conductive medium with crack","authors":"Y. V. Datsko","doi":"10.1109/DIPED.2005.201587","DOIUrl":"https://doi.org/10.1109/DIPED.2005.201587","url":null,"abstract":"Introduction. For detecting subsurface cracks in metal constructions broad application have received eddy-current methods of non-destructive testing, which based on the analysis of interaction an eddy-currents and defect induced in conductor [1]. If the crack has sufficiently small opening then it perform function of a surface barrier where the electric field actually suffers break. Therefore for research of an electromagnetic field, scattered such cracks, it is used its model as a cut on some opened surfaces. There is the primary problem to define jumps electromagnetic field vectors jumps at transition through a surface of a crack. Physically this jump can be presented some surface distribution of electric dipoles [2]. Research of the general regularities of forming of this distribution carry out on model problems when the body occupies boundless (half-boundary) domain, and the crack is described by a flat figure of canonical forms (for example, circle). Statement of the problem. Let us consider the ideal crack described by disk of single radius s (fig. 1.) in conductive half-space with flat boundary and //7 7 7 7 7 7 7 7/ / / electroconductivity a . The plain electromagnetic wave (time dependence Ho e-i\") is falling on boundary of halfspace under an arbitrary angel. Magnetic conductivity of the crack and E,, medium, which surrounds it, is equal","PeriodicalId":169377,"journal":{"name":"Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129589324","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 method of antenna directivity calculation on the basis of main patterns 基于主方向图的天线指向性计算方法
Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 1900-01-01 DOI: 10.1109/DIPED.2005.201613
B. Levin
{"title":"The method of antenna directivity calculation on the basis of main patterns","authors":"B. Levin","doi":"10.1109/DIPED.2005.201613","DOIUrl":"https://doi.org/10.1109/DIPED.2005.201613","url":null,"abstract":"For an evaluation of antenna directivity it is necessary to know the three-dimensional antenna patterns. As a rule, antenna patterns are measured only in two main planes: horizontal and vertical. In this paper the method of antenna directivity calculation on the basis of main patterns will be considered.","PeriodicalId":169377,"journal":{"name":"Proceedings of Xth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130888038","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
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