Pub Date : 2011-07-25DOI: 10.1109/INDS.2011.6024837
V. Sravanthi, T. Schlechter
For mobile user equipments (UE) a careful power management is essential. Despite this fact, quite an amount of energy is wasted in todays UEs analog and digital frontends. Those are engineered for extracting the wanted signal from a spectral environment defined in the corresponding communication standards with their extremely tough requirements. In a real receiving process those requirements can typically be considered as dramatically less critical. Knowledge about the actual environmental spectral conditions allows to reconfigure both frontends to the actual needs and to save energy. In the recent past several approaches solving this issue for Long Term Evolution systems using multiplier free multi rate low cost filter banks have been discussed. In this paper we present a co-simulation environment for an efficient hardware implementation of the proposed algorithms using Matlab and two Field Programmable Gate Array platforms. The specific hardware setup as well as the used communication protocols between hardware and software are discussed.
{"title":"Hardware-software co-simulation environment for a multiplier free blocker detection approach for LTE systems","authors":"V. Sravanthi, T. Schlechter","doi":"10.1109/INDS.2011.6024837","DOIUrl":"https://doi.org/10.1109/INDS.2011.6024837","url":null,"abstract":"For mobile user equipments (UE) a careful power management is essential. Despite this fact, quite an amount of energy is wasted in todays UEs analog and digital frontends. Those are engineered for extracting the wanted signal from a spectral environment defined in the corresponding communication standards with their extremely tough requirements. In a real receiving process those requirements can typically be considered as dramatically less critical. Knowledge about the actual environmental spectral conditions allows to reconfigure both frontends to the actual needs and to save energy. In the recent past several approaches solving this issue for Long Term Evolution systems using multiplier free multi rate low cost filter banks have been discussed. In this paper we present a co-simulation environment for an efficient hardware implementation of the proposed algorithms using Matlab and two Field Programmable Gate Array platforms. The specific hardware setup as well as the used communication protocols between hardware and software are discussed.","PeriodicalId":117809,"journal":{"name":"Proceedings of the Joint INDS'11 & ISTET'11","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115476521","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 : 2011-07-25DOI: 10.1109/INDS.2011.6024821
W. Chlewicki, P. Baniukiewicz, T. Chady, A. Brykalski
An extended radiography system for identification of defect position in three dimensions is presented. We propose the use of limited angle reconstruction algorithms combined with a procedure for determining the depth of the object, thus partially recovering the third dimension from limited set 2D X-ray projections acquired along linear trajectory.
{"title":"Extended radiography system for identification of defect position in three dimensions","authors":"W. Chlewicki, P. Baniukiewicz, T. Chady, A. Brykalski","doi":"10.1109/INDS.2011.6024821","DOIUrl":"https://doi.org/10.1109/INDS.2011.6024821","url":null,"abstract":"An extended radiography system for identification of defect position in three dimensions is presented. We propose the use of limited angle reconstruction algorithms combined with a procedure for determining the depth of the object, thus partially recovering the third dimension from limited set 2D X-ray projections acquired along linear trajectory.","PeriodicalId":117809,"journal":{"name":"Proceedings of the Joint INDS'11 & ISTET'11","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122482742","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 : 2011-07-25DOI: 10.1109/INDS.2011.6024793
L. Klinkenbusch, Michael Kijowski
The scattering of a plane electromagnetic wave by a perfectly electrically conducting (PEC) semi-infinite elliptic cone is treated by means of the spherical-multipole technique in sphero-conal coordinates. The total field in the space outside the elliptic cone is determined as an eigenfunction expansion, and the scattered far field is obtained by a single integration over the induced surface currents. The final free-space-type expansion is not converging in the usual sense but a linear series transformation due to Cesàro is applied to obtain a meaningful and consistent limiting value. The eigenvalues of the underlying two-parametric eigenvalue problem with two coupled Lame´ equations belong to the Dirichlet- or the Neumann condition and can be arranged as so-called eigenvalue curves. It has been found that the eigenvalues can be separated into a first type, where the eigenfunctions look very similar to free-space modes and do not contribute to the scattered field and into a second type relevant for the scattered field. Similar non-contributing parts also occur in the Physical-Optics approximate solution of the scattering problem. As shown in this paper these observations allow to significantly improve the accuracy of the calculated scattering coefficients.
{"title":"Spherical-multipole analysis of electromagnetic scattering by an elliptic cone","authors":"L. Klinkenbusch, Michael Kijowski","doi":"10.1109/INDS.2011.6024793","DOIUrl":"https://doi.org/10.1109/INDS.2011.6024793","url":null,"abstract":"The scattering of a plane electromagnetic wave by a perfectly electrically conducting (PEC) semi-infinite elliptic cone is treated by means of the spherical-multipole technique in sphero-conal coordinates. The total field in the space outside the elliptic cone is determined as an eigenfunction expansion, and the scattered far field is obtained by a single integration over the induced surface currents. The final free-space-type expansion is not converging in the usual sense but a linear series transformation due to Cesàro is applied to obtain a meaningful and consistent limiting value. The eigenvalues of the underlying two-parametric eigenvalue problem with two coupled Lame´ equations belong to the Dirichlet- or the Neumann condition and can be arranged as so-called eigenvalue curves. It has been found that the eigenvalues can be separated into a first type, where the eigenfunctions look very similar to free-space modes and do not contribute to the scattered field and into a second type relevant for the scattered field. Similar non-contributing parts also occur in the Physical-Optics approximate solution of the scattering problem. As shown in this paper these observations allow to significantly improve the accuracy of the calculated scattering coefficients.","PeriodicalId":117809,"journal":{"name":"Proceedings of the Joint INDS'11 & ISTET'11","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128372239","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 : 2011-07-25DOI: 10.1109/INDS.2011.6024811
B. Szymanik, S. Gratkowski
The active infrared thermography, using external energy source to produce a thermal contrast between the feature of interest and the background, is relatively new NDT technique. The microwaves applied in this method as the source of energy, effectively shorten the time needed to receive observable thermal image at the surface of examined specimen. In this paper, above method's application to landmines' detection will be considered. In this case, the microwave generator, connected to rectangular waveguide is used to heat the ground's surface. Obtained thermal pattern should be characterized by uniform temperature distribution. This condition can be met by applying an appropriate waveguide flange, ensuring an even distribution of EM field. In this article genetic algorithm-based optimization will be applied to determine the box-horn based flange's dimensions.
{"title":"Waveguide flange's shape optimization in microwave enhanced infrared landmines' detection","authors":"B. Szymanik, S. Gratkowski","doi":"10.1109/INDS.2011.6024811","DOIUrl":"https://doi.org/10.1109/INDS.2011.6024811","url":null,"abstract":"The active infrared thermography, using external energy source to produce a thermal contrast between the feature of interest and the background, is relatively new NDT technique. The microwaves applied in this method as the source of energy, effectively shorten the time needed to receive observable thermal image at the surface of examined specimen. In this paper, above method's application to landmines' detection will be considered. In this case, the microwave generator, connected to rectangular waveguide is used to heat the ground's surface. Obtained thermal pattern should be characterized by uniform temperature distribution. This condition can be met by applying an appropriate waveguide flange, ensuring an even distribution of EM field. In this article genetic algorithm-based optimization will be applied to determine the box-horn based flange's dimensions.","PeriodicalId":117809,"journal":{"name":"Proceedings of the Joint INDS'11 & ISTET'11","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121599308","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 : 2011-07-25DOI: 10.1007/978-3-642-34560-9_14
P. Karban, I. Doležel, F. Mach, B. Ulrych
{"title":"Advanced adaptive algorithms in finite element method of higher order of accuracy","authors":"P. Karban, I. Doležel, F. Mach, B. Ulrych","doi":"10.1007/978-3-642-34560-9_14","DOIUrl":"https://doi.org/10.1007/978-3-642-34560-9_14","url":null,"abstract":"","PeriodicalId":117809,"journal":{"name":"Proceedings of the Joint INDS'11 & ISTET'11","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121769053","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 : 2011-07-25DOI: 10.1109/INDS.2011.6024829
P. Baniukiewicz, R. Sikora
A technology that utilizes penetrating rays is one of the oldest nondestructive testing methods. Nowadays, the process of radiogram analysis is performed by qualified human operators and automatic systems are still under development. In this work we present advanced algorithms for automatic segmentation of radiographic images of welded joints. The goal of segmentation of a radiogram is to change and simplify representation of the image into a form that is more meaningful and easier to analyse automatically. The radiogram is divided into parts containing the weld line, image quality indicators, and possible defects. Then, each part is analysed separately by specialized algorithms within the framework of the Intelligent System for Radiogram Analysis.
{"title":"Automatic detection of objects in radiographic images","authors":"P. Baniukiewicz, R. Sikora","doi":"10.1109/INDS.2011.6024829","DOIUrl":"https://doi.org/10.1109/INDS.2011.6024829","url":null,"abstract":"A technology that utilizes penetrating rays is one of the oldest nondestructive testing methods. Nowadays, the process of radiogram analysis is performed by qualified human operators and automatic systems are still under development. In this work we present advanced algorithms for automatic segmentation of radiographic images of welded joints. The goal of segmentation of a radiogram is to change and simplify representation of the image into a form that is more meaningful and easier to analyse automatically. The radiogram is divided into parts containing the weld line, image quality indicators, and possible defects. Then, each part is analysed separately by specialized algorithms within the framework of the Intelligent System for Radiogram Analysis.","PeriodicalId":117809,"journal":{"name":"Proceedings of the Joint INDS'11 & ISTET'11","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130759936","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 : 2011-07-25DOI: 10.1109/INDS.2011.6024808
A. Milovanović, Branko M. Koprivica
In this paper the application of the Equivalent Electrodes Method (EEM) for the analysis of square coaxial lines has been presented. The capacitance per unit length, for different shapes and sizes, has been calculated. The results obtained by EEM have been compared with those reported in the literature, obtained by other methods, and those obtained by using software package COMSOL Multiphysics. These results have been found to be in very good agreement.
{"title":"Analysis of square coaxial lines by using Equivalent Electrodes Method","authors":"A. Milovanović, Branko M. Koprivica","doi":"10.1109/INDS.2011.6024808","DOIUrl":"https://doi.org/10.1109/INDS.2011.6024808","url":null,"abstract":"In this paper the application of the Equivalent Electrodes Method (EEM) for the analysis of square coaxial lines has been presented. The capacitance per unit length, for different shapes and sizes, has been calculated. The results obtained by EEM have been compared with those reported in the literature, obtained by other methods, and those obtained by using software package COMSOL Multiphysics. These results have been found to be in very good agreement.","PeriodicalId":117809,"journal":{"name":"Proceedings of the Joint INDS'11 & ISTET'11","volume":"221 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122047467","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 : 2011-07-25DOI: 10.1109/INDS.2011.6024809
S. Vujević, Zdenko Balaz, Dino Lovrić
Grounding systems of various shapes can be approximated by a cylindrical metal plate. Highly accurate expression for the metal plate ground impedance is needed in numerical analysis of various electromagnetic problems. Such expression is developed using an analytical formula for the potential distribution of equipotential metal plate in homogeneous unbounded medium. The Galerkin — Bubnov weighted residual methods is employed to expand this analytical expression valid in homogeneous unbounded medium to an expression valid in homogeneous earth.
{"title":"Ground impedance of cylindrical metal plate buried in homogeneous earth","authors":"S. Vujević, Zdenko Balaz, Dino Lovrić","doi":"10.1109/INDS.2011.6024809","DOIUrl":"https://doi.org/10.1109/INDS.2011.6024809","url":null,"abstract":"Grounding systems of various shapes can be approximated by a cylindrical metal plate. Highly accurate expression for the metal plate ground impedance is needed in numerical analysis of various electromagnetic problems. Such expression is developed using an analytical formula for the potential distribution of equipotential metal plate in homogeneous unbounded medium. The Galerkin — Bubnov weighted residual methods is employed to expand this analytical expression valid in homogeneous unbounded medium to an expression valid in homogeneous earth.","PeriodicalId":117809,"journal":{"name":"Proceedings of the Joint INDS'11 & ISTET'11","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127540993","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 : 2011-07-25DOI: 10.1109/INDS.2011.6024804
L. Kolev
In a recent paper [1], an efficient interval method for determining the range of the power consumption in linear dc interval parameter circuits has been suggested. The method reduces to solving an associated interval linear programming problem. It has been shown that its numerical complexity is not a priori exponential: if certain sufficient conditions are valid, it is, in fact, polynomial. Numerical evidence indicates that the method suggested can be an alternative to the widely used Monte-Carlo method since the former method provides exact (within rounding errors) results or tight outer approximations for lesser computation times.
{"title":"Determining the range of the active and reactive power in AC interval parameter circuits","authors":"L. Kolev","doi":"10.1109/INDS.2011.6024804","DOIUrl":"https://doi.org/10.1109/INDS.2011.6024804","url":null,"abstract":"In a recent paper [1], an efficient interval method for determining the range of the power consumption in linear dc interval parameter circuits has been suggested. The method reduces to solving an associated interval linear programming problem. It has been shown that its numerical complexity is not a priori exponential: if certain sufficient conditions are valid, it is, in fact, polynomial. Numerical evidence indicates that the method suggested can be an alternative to the widely used Monte-Carlo method since the former method provides exact (within rounding errors) results or tight outer approximations for lesser computation times.","PeriodicalId":117809,"journal":{"name":"Proceedings of the Joint INDS'11 & ISTET'11","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131978141","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 : 2011-07-25DOI: 10.1109/INDS.2011.6024800
B. Miskovic
This is a brief presentation of EM theory, as the well-elaborated electrodynamics of moving bodies. Apart from the standard differential equations, some algebraic relations, complementary in the sense and application, are affirmed. The field transformations, completed by these relations, simultaneously treat transverse and longitudinal directions. Relativistic kinematics and respective opinions, based on the incomplete transformations, are thus convincingly surpassed.
{"title":"Electrodynamics of moving bodies: Systematic foundation of EM theory","authors":"B. Miskovic","doi":"10.1109/INDS.2011.6024800","DOIUrl":"https://doi.org/10.1109/INDS.2011.6024800","url":null,"abstract":"This is a brief presentation of EM theory, as the well-elaborated electrodynamics of moving bodies. Apart from the standard differential equations, some algebraic relations, complementary in the sense and application, are affirmed. The field transformations, completed by these relations, simultaneously treat transverse and longitudinal directions. Relativistic kinematics and respective opinions, based on the incomplete transformations, are thus convincingly surpassed.","PeriodicalId":117809,"journal":{"name":"Proceedings of the Joint INDS'11 & ISTET'11","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122985698","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}
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