Pub Date : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512144
M. Snajdarova, B. Babušiak, I. Cap
The EegStudio, the powerful tool for displaying, analyzing and processing of electroencephalogram (EEG) with user friendly graphical interface is described in this paper. The EegStudio provides highlight of specific frequency bands of brain, interactive signal filtration, analysis in time-frequency domain and topographic mapping of the brain activity. The brain mapping is used for visualization of brain activity over the scalp. This application allows amplitude, frequency, interhemispheric coherence and time delay brain mapping. The mapping of time delay in records with epileptic seizure can be used for localization of the epileptic focus.
{"title":"Interactive tool for analysis of EEG signal","authors":"M. Snajdarova, B. Babušiak, I. Cap","doi":"10.1109/ELEKTRO.2016.7512144","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512144","url":null,"abstract":"The EegStudio, the powerful tool for displaying, analyzing and processing of electroencephalogram (EEG) with user friendly graphical interface is described in this paper. The EegStudio provides highlight of specific frequency bands of brain, interactive signal filtration, analysis in time-frequency domain and topographic mapping of the brain activity. The brain mapping is used for visualization of brain activity over the scalp. This application allows amplitude, frequency, interhemispheric coherence and time delay brain mapping. The mapping of time delay in records with epileptic seizure can be used for localization of the epileptic focus.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128082217","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 : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512162
J. Brozek, Dan Hamernik, P. Veselý, Vaclav Svoboda
The current development in the area of computer graphics focuses itself on 3D visualization. This direction, set by contemporary trends, further utilizes 3D visualization, increases its quality and improves visualization devices for 3D graphics. This change must be reflected by teaching methods as well, through which future specialists of advanced graphics, modellers, but also programmers and implementation coders. The article presents its own software solution and innovative approach to teaching computer graphics. The solution and all principles are based on the Montessori method of child education.
{"title":"Application of the Montessori method in tercial education of a computer 3D graphics","authors":"J. Brozek, Dan Hamernik, P. Veselý, Vaclav Svoboda","doi":"10.1109/ELEKTRO.2016.7512162","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512162","url":null,"abstract":"The current development in the area of computer graphics focuses itself on 3D visualization. This direction, set by contemporary trends, further utilizes 3D visualization, increases its quality and improves visualization devices for 3D graphics. This change must be reflected by teaching methods as well, through which future specialists of advanced graphics, modellers, but also programmers and implementation coders. The article presents its own software solution and innovative approach to teaching computer graphics. The solution and all principles are based on the Montessori method of child education.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128839322","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 : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512036
P. Kamencay, Tibor Trnovszký, M. Benco, R. Hudec, P. Sykora, Andrej Satnik
In this paper, the performances of image recognition methods such as Principal Component Analysis (PCA), Linear Discriminant Analysis (LDA) and Local Binary Patterns Histograms (LBPH) are tested and compared for the image recognition of the input animal images. The main idea of this paper is to present an independent, comparative study and some of the benefits and drawbacks of these most popular image recognition methods. Two sets of experiments are conducted for relative performance evaluations. In the first part of our experiments, the recognition accuracy of PCA, LDA and LBPH is demonstrated. The overall time execution for animal recognition process is evaluated in the second set of our experiments. We conduct tests on created animal database. The all algorithms have been tested on 300 different subjects (60 images for each class). The experimental result shows that the PCA features provide better results as LDA and LBPH for large training set. On the other hand, LBPH is better than PCA and LDA for small training data set.
{"title":"Accurate wild animal recognition using PCA, LDA and LBPH","authors":"P. Kamencay, Tibor Trnovszký, M. Benco, R. Hudec, P. Sykora, Andrej Satnik","doi":"10.1109/ELEKTRO.2016.7512036","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512036","url":null,"abstract":"In this paper, the performances of image recognition methods such as Principal Component Analysis (PCA), Linear Discriminant Analysis (LDA) and Local Binary Patterns Histograms (LBPH) are tested and compared for the image recognition of the input animal images. The main idea of this paper is to present an independent, comparative study and some of the benefits and drawbacks of these most popular image recognition methods. Two sets of experiments are conducted for relative performance evaluations. In the first part of our experiments, the recognition accuracy of PCA, LDA and LBPH is demonstrated. The overall time execution for animal recognition process is evaluated in the second set of our experiments. We conduct tests on created animal database. The all algorithms have been tested on 300 different subjects (60 images for each class). The experimental result shows that the PCA features provide better results as LDA and LBPH for large training set. On the other hand, LBPH is better than PCA and LDA for small training data set.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129614424","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 : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512078
Roman Bodnar, A. Otcenásová, M. Regula, Michal Repak
This paper discusses universal methodology for quantification of equipment trips due to voltage sags. Every sensitive equipment is described by the voltage-tolerance curve with specific limit values. Generally, one type of the sensitive equipment can be described by different characteristics that create an area of uncertainty, which influences the behavior of these devices. For calculation of expected number of equipment trips due to voltage sags are using various types of sensitivity equipment (e.g. personal computer, adjustable speed drive and programmable logic controller). The first general probability approach used probability density functions for bivariate random variable (magnitude and duration of the voltage sag) and the second cumulative probability approach used probability distribution functions for bivariate random variable. Moreover, the estimation of equipment trips is complemented with determining various levels of sensitivity, which is dependent on operating conditions.
{"title":"Methodology for quantification of equipment trips due to voltage sags","authors":"Roman Bodnar, A. Otcenásová, M. Regula, Michal Repak","doi":"10.1109/ELEKTRO.2016.7512078","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512078","url":null,"abstract":"This paper discusses universal methodology for quantification of equipment trips due to voltage sags. Every sensitive equipment is described by the voltage-tolerance curve with specific limit values. Generally, one type of the sensitive equipment can be described by different characteristics that create an area of uncertainty, which influences the behavior of these devices. For calculation of expected number of equipment trips due to voltage sags are using various types of sensitivity equipment (e.g. personal computer, adjustable speed drive and programmable logic controller). The first general probability approach used probability density functions for bivariate random variable (magnitude and duration of the voltage sag) and the second cumulative probability approach used probability distribution functions for bivariate random variable. Moreover, the estimation of equipment trips is complemented with determining various levels of sensitivity, which is dependent on operating conditions.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128877264","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 : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512072
L'uboš Suchý, Karol Kyslan, Ž. Ferková, F. Ďurovský
The paper presents an approach to the dynamic emulation of mechanical loads. The main goal was to implement known control algorithm to the industrial converter SINAMICS S120 with the control unit CU320 using Drive Control Chart programming tool. The reference torque of a load machine is calculated through the closed-loop control algorithm using PI estimator. Proposed implementation enables the user the emulation of various mechanical loads with the industrial drive dynamometer, although only variation of the inertia and the viscous friction is reported here.
{"title":"Dynamic emulation of mechanical loads — Analysis and implementation into industrial drive","authors":"L'uboš Suchý, Karol Kyslan, Ž. Ferková, F. Ďurovský","doi":"10.1109/ELEKTRO.2016.7512072","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512072","url":null,"abstract":"The paper presents an approach to the dynamic emulation of mechanical loads. The main goal was to implement known control algorithm to the industrial converter SINAMICS S120 with the control unit CU320 using Drive Control Chart programming tool. The reference torque of a load machine is calculated through the closed-loop control algorithm using PI estimator. Proposed implementation enables the user the emulation of various mechanical loads with the industrial drive dynamometer, although only variation of the inertia and the viscous friction is reported here.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126454618","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 : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512083
S. Girshin, V. Goryunov, E. Kuznetsov, E. Petrova, D. Osipov
The problem of modeling electrical loads in the calculation of modes of electric networks with controllable arc extinguish reactor with asymmetry modes is considered. The model is based on the simplifying assumption of constant power load permitting the use of a minimum set of input data. The equations are obtained using methods of phase coordinates and symmetrical components. The model is a formula of nonlinear transformation of phase voltages in phase load currents with the double exception of zero sequence. It is shown that even with a significant bias of neutral conductor load currents using this model are almost symmetrical. The proposed model of the load can be used to calculate the normal net mode with arc extinguish reactor, as well as to calculate the single phase-to-earth fault modes.
{"title":"Simulation of electrical loads for the steady-state regime calculation of electric grids with arc extinguish reactor","authors":"S. Girshin, V. Goryunov, E. Kuznetsov, E. Petrova, D. Osipov","doi":"10.1109/ELEKTRO.2016.7512083","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512083","url":null,"abstract":"The problem of modeling electrical loads in the calculation of modes of electric networks with controllable arc extinguish reactor with asymmetry modes is considered. The model is based on the simplifying assumption of constant power load permitting the use of a minimum set of input data. The equations are obtained using methods of phase coordinates and symmetrical components. The model is a formula of nonlinear transformation of phase voltages in phase load currents with the double exception of zero sequence. It is shown that even with a significant bias of neutral conductor load currents using this model are almost symmetrical. The proposed model of the load can be used to calculate the normal net mode with arc extinguish reactor, as well as to calculate the single phase-to-earth fault modes.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126578518","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 : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512052
F. Duchoň, Andrej Babinec, Martin Dekan, J. Rodina, Zuzana Mikulova, M. Szabová, Michal Lisican
Aim of this article is the implementation of simple image processing in the inspection process. The inspection process is focused on door components in automotive industry. Article describes the needs of such process, implementation of solution and evaluation of results. Final application is based on OpenCV library and its components. Moreover, the process is optimized for real inspection system and it was tested in this system.
{"title":"Detection of door's components in automotive industry by simple image processing","authors":"F. Duchoň, Andrej Babinec, Martin Dekan, J. Rodina, Zuzana Mikulova, M. Szabová, Michal Lisican","doi":"10.1109/ELEKTRO.2016.7512052","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512052","url":null,"abstract":"Aim of this article is the implementation of simple image processing in the inspection process. The inspection process is focused on door components in automotive industry. Article describes the needs of such process, implementation of solution and evaluation of results. Final application is based on OpenCV library and its components. Moreover, the process is optimized for real inspection system and it was tested in this system.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130103096","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 : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512148
Jana Bírešová, P. Hockicko
The sample of metaphosphate glass Ba(PO3)2 was investigated using the electrical conductivity measurements in the range of frequencies 10 Hz-2 MHz and over range of temperatures 643 K-750 K. The aim of this work is the investigation of effect BaO modifier to the structure of phosphate glass using dielectric relaxation spectroscopy which allows us study the fundamental properties of the investigated materials like ac conductivity, dc conductivity and electric modulus formalism. The temperature dependences of dc and ac conductivities were investigated in accordance with Jonscher's universal power law and experimental values of imaginary part of electric modulus were fitted by KWW function. The estimated values of activation energy for dc conduction and electric modulus are very close.
对偏磷酸盐玻璃Ba(PO3)2样品在10hz ~ 2mhz频率和643 K ~ 750k温度范围内的电导率进行了研究。本工作的目的是利用介电弛豫光谱研究BaO改性剂对磷酸盐玻璃结构的影响，从而研究所研究材料的交流电导率、直流电导率和电模量的基本性质。根据Jonscher的普适幂律研究了直流和交流电导率的温度关系，并用KWW函数拟合了电模量虚部的实验值。直流电导活化能和电模量的估计值非常接近。
{"title":"Effect of BaO modifier on the metaphosphate composition by means of conductivity and modulus representation","authors":"Jana Bírešová, P. Hockicko","doi":"10.1109/ELEKTRO.2016.7512148","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512148","url":null,"abstract":"The sample of metaphosphate glass Ba(PO3)2 was investigated using the electrical conductivity measurements in the range of frequencies 10 Hz-2 MHz and over range of temperatures 643 K-750 K. The aim of this work is the investigation of effect BaO modifier to the structure of phosphate glass using dielectric relaxation spectroscopy which allows us study the fundamental properties of the investigated materials like ac conductivity, dc conductivity and electric modulus formalism. The temperature dependences of dc and ac conductivities were investigated in accordance with Jonscher's universal power law and experimental values of imaginary part of electric modulus were fitted by KWW function. The estimated values of activation energy for dc conduction and electric modulus are very close.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127493829","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 : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512034
P. Groumpos
The challenging issues of modelling and controlling complex dynamic systems (CDS) are carefully considered and properly addressed. Qualitative description of most of the parameters of complex dynamic systems results inevitably in fuzziness, complexity and uncertainty. One of the challenges of accepting the operation of any complex dynamic system is the ability to make Decisions so the system runs efficiently and cost effectively. A short but useful historical overview of decision support systems (DSS) is given. The need for new conceptual and advanced models for addressing the challenging issues of CDS is provided. Fuzzy Cognitive Maps (FCMs) as a new modelling approach is briefly described. An illustrative example is provided along with some very interesting promising results.
{"title":"Conceptual modeling and decision making support systems for complex dynamical systems: A critical overview","authors":"P. Groumpos","doi":"10.1109/ELEKTRO.2016.7512034","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512034","url":null,"abstract":"The challenging issues of modelling and controlling complex dynamic systems (CDS) are carefully considered and properly addressed. Qualitative description of most of the parameters of complex dynamic systems results inevitably in fuzziness, complexity and uncertainty. One of the challenges of accepting the operation of any complex dynamic system is the ability to make Decisions so the system runs efficiently and cost effectively. A short but useful historical overview of decision support systems (DSS) is given. The need for new conceptual and advanced models for addressing the challenging issues of CDS is provided. Fuzzy Cognitive Maps (FCMs) as a new modelling approach is briefly described. An illustrative example is provided along with some very interesting promising results.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127807962","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 : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512160
N. Zhuravleva, A. Reznik, D. Kiesewetter, Anna Tukacheva, E. Smirnova
The thermal aging of insulating paper in composition of paper-impregnated insulation was investigated. The mechanical properties of the paper before and after aging, as well as other parameters were measured, in particular, the tangent of dielectric loss angle and the relative light transmission transformer oil. The sorption capacity of some pulp and dielectrics was evaluated. The significant dependence of the type of cellulose paper on change of parameters of paper-impregnated insulation at aging was revealed.
{"title":"On the increasing of the sorption capacity and temperature resistance of cellulosic insulation dielectrics","authors":"N. Zhuravleva, A. Reznik, D. Kiesewetter, Anna Tukacheva, E. Smirnova","doi":"10.1109/ELEKTRO.2016.7512160","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512160","url":null,"abstract":"The thermal aging of insulating paper in composition of paper-impregnated insulation was investigated. The mechanical properties of the paper before and after aging, as well as other parameters were measured, in particular, the tangent of dielectric loss angle and the relative light transmission transformer oil. The sorption capacity of some pulp and dielectrics was evaluated. The significant dependence of the type of cellulose paper on change of parameters of paper-impregnated insulation at aging was revealed.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131246793","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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