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EFFECT OF RAPID ANNEALINGON MAGNETIC PROPERTIES OF THE NANOCRYSTALLINE Fe80Nb3Cu1Si6B10ALLOY 快速退火对纳米Fe80Nb3Cu1Si6B10合金磁性能的影响
Acta Electrotechnica et Informatica Pub Date : 2019-06-30 DOI: 10.15546/AEEI-2019-0012
B. Kunca, J. Marcin, P. Švec, I. Škorvánek
{"title":"EFFECT OF RAPID ANNEALINGON MAGNETIC PROPERTIES OF THE NANOCRYSTALLINE Fe80Nb3Cu1Si6B10ALLOY","authors":"B. Kunca, J. Marcin, P. Švec, I. Škorvánek","doi":"10.15546/AEEI-2019-0012","DOIUrl":"https://doi.org/10.15546/AEEI-2019-0012","url":null,"abstract":"Impact of rapid annealing on the soft magnetic properties of the Fe80Nb3Cu1Si6B10 alloy has been investigated. Parent as-quenched ribbons were prepared by planar flow casting method. Rapid thermal treatments (7-30s) has been conducted at 500°C using the preheated Cu blocks to ensure elevated heating rate of more than 100 K/s. Reference samples were isothermally annealed in the vacuum furnace for 1 h at the same temperature. X-Ray diffraction unveiled formation of nanocrystalline structure of bcc α-Fe(Si) grains, embedded in the residual amorphous matrix in all processed samples, irrespective of the annealing technique. Evolution of coercivity and saturation magnetization values, obtained from the measured hysteresis loops, showed improved magnetic softness of the rapidly annealed samples, compared to the as-quenched and conventionally processed ones. Significant embrittlement of the samples after nanocrystallization has been observed regardless of annealing time and thermal treatment technique used.","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41846958","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
A PERFORMANCE EVALUATION OF A MULTIFACETED ELECTRONIC VOTING FRAMEWORK 多层面的电子投票框架的性能评估
Acta Electrotechnica et Informatica Pub Date : 2019-06-30 DOI: 10.15546/AEEI-2019-0008
O. Okediran
{"title":"A PERFORMANCE EVALUATION OF A MULTIFACETED ELECTRONIC VOTING FRAMEWORK","authors":"O. Okediran","doi":"10.15546/AEEI-2019-0008","DOIUrl":"https://doi.org/10.15546/AEEI-2019-0008","url":null,"abstract":"This paper, we present a performance evaluation of a multifaceted electronic voting framework. The electronic voting model that was developed on the framework is capable of handling electronic ballots with multiple scopes simultaneously via three different electronic voting means. The model catered for probity of an election process in terms of generic and functional requirements. The performance evaluation detailed the degree to which the framework meets the generic and functional requirements of electronic voting systems using a five-point psychometric scale. The results of the quantitative analysis showed that the framework is capable of ensuring voters’ privacy and authenticity while the integrity, accuracy and verifiability of ballots casted are guaranteed.","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45973751","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
DATA ANALYSIS OF THE FINANCIAL INDICATORS OF POLISH COMPANIES 波兰企业财务指标的数据分析
Acta Electrotechnica et Informatica Pub Date : 2019-06-30 DOI: 10.15546/AEEI-2019-0015
Anna Biceková, Ludmila Pusztová
{"title":"DATA ANALYSIS OF THE FINANCIAL INDICATORS OF POLISH COMPANIES","authors":"Anna Biceková, Ludmila Pusztová","doi":"10.15546/AEEI-2019-0015","DOIUrl":"https://doi.org/10.15546/AEEI-2019-0015","url":null,"abstract":"This article aims to present the issue of the company ́s bankruptcy and defines which financial indicators affects and can accurately detect the financial health of the company and thus better predict the emergence of potential bankruptcy. Currently, these methods include mainly modern techniques from the data mining area. For the practical application of this approach to predict the future state of the company, were used the financial indicators of Polish companies. We used the most suitable algorithms for predicting bankruptcies – decision trees that provide simple results interpretation. The analytical process is managed by the CRIPS-DM methodology, which offers a description of the important steps needed to solve this task. Part of the article constitutes an analysis of the current state, which presents solutions to this problem by other authors. Analysing available data we found that the most effective financial indicators are Attr27[profit on operating activities / financial expenses], Attr34 [operating expense/total liabilities] and Attr41 (total liabilities/[(profit on operating activities + depreciation)*(12*365)]). The model that best-predicted bankruptcy was the C5.0 decision tree algorithm.","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46798178","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
BASIC SIGNAL PROCESSING PRINCIPLES FOR MONITORING OF PERSONS USING UWB SENSORS – AN OVERVIEW 使用超宽带传感器监视人员的基本信号处理原理。概述
Acta Electrotechnica et Informatica Pub Date : 2019-06-30 DOI: 10.15546/AEEI-2019-0009
D. Kocur, M. Švecová, R. Zetik
{"title":"BASIC SIGNAL PROCESSING PRINCIPLES FOR MONITORING OF PERSONS USING UWB SENSORS – AN OVERVIEW","authors":"D. Kocur, M. Švecová, R. Zetik","doi":"10.15546/AEEI-2019-0009","DOIUrl":"https://doi.org/10.15546/AEEI-2019-0009","url":null,"abstract":"The paper offers an overview of signal processing approaches that are suitable for monitoring of persons by means of ultrawideband sensors. The “Monitoring of persons” is related to their detection, localization, and tracking and in the case of static persons, also to the monitoring of their vital signs such as the breathing frequency and the heart rate. This paper discusses basic principles in the monitoring of persons who can be moving, static, or changing the character of their movement. In the case of static persons, the paper describes signal processing methods suitable for contactless estimation of their breathing frequency and the heart rate. Monitoring of persons using UWB sensors is attractive in many application scenarios such as emergency, rescue, medical, etc. Therefore, we believe that this comprehensive survey brings a lot of interesting information to researchers and specialists working in the field of contactless monitoring of persons.","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45879031","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: 5
INTERACTIVE TOOL FOR VISUALIZATION OF TOPIC MODELS 用于主题模型可视化的交互式工具
Acta Electrotechnica et Informatica Pub Date : 2019-06-30 DOI: 10.15546/AEEI-2019-0014
Miroslav Smatana, Viktória Martinková, Dominika Maršáleková, P. Butka
{"title":"INTERACTIVE TOOL FOR VISUALIZATION OF TOPIC MODELS","authors":"Miroslav Smatana, Viktória Martinková, Dominika Maršáleková, P. Butka","doi":"10.15546/AEEI-2019-0014","DOIUrl":"https://doi.org/10.15546/AEEI-2019-0014","url":null,"abstract":"","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42630415","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
STATOR ACTIVE AND REACTIVE POWER RIPPLES MINIMIZATION FOR DVC CONTROL OF DFIG BY USING FIVE-LEVEL NEURAL SPACE VECTOR MODULATION 基于五级神经空间矢量调制的dfig定子有功和无功波纹最小化控制
Acta Electrotechnica et Informatica Pub Date : 2019-06-30 DOI: 10.15546/AEEI-2019-0010
H. Benbouhenni, Oran Algeria Ecole Nationale Polytechnique d’Oran Maurice Audin
{"title":"STATOR ACTIVE AND REACTIVE POWER RIPPLES MINIMIZATION FOR DVC CONTROL OF DFIG BY USING FIVE-LEVEL NEURAL SPACE VECTOR MODULATION","authors":"H. Benbouhenni, Oran Algeria Ecole Nationale Polytechnique d’Oran Maurice Audin","doi":"10.15546/AEEI-2019-0010","DOIUrl":"https://doi.org/10.15546/AEEI-2019-0010","url":null,"abstract":"ABSTRACT This paper presents a direct vector control (DVC) strategy for the doubly fed induction generator (DFIG)based wind turbine systems. The major disadvantages that are usually associated with DVC control scheme are the electromagnetic torque, reactive power and active power ripples. To overcome these disadvantages an advanced five-level space vector modulation (5L-SVM) strategy based on neural networks (NNs) controller is proposed. The proposed controller is shown to be able to reduce the reactive and active powers ripples and to improve the performances of the DVC control. Simulation results are shown by using Matlab/Simulink.","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48735000","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: 5
ADAPTIVE SELF-TUNING FUZZY BACKSTEPPING CONTROLLER FOR THE CONTROL OF ELECTRIC VEHICLE WITH TWO-MOTOR-WHEEL DRIVE 电动汽车两轮驱动的自适应自校正模糊反步控制器
Acta Electrotechnica et Informatica Pub Date : 2019-06-30 DOI: 10.15546/AEEI-2019-0013
A. Laguidi, A. Hazzab, O. Boughazi, M. Habbab
{"title":"ADAPTIVE SELF-TUNING FUZZY BACKSTEPPING CONTROLLER FOR THE CONTROL OF ELECTRIC VEHICLE WITH TWO-MOTOR-WHEEL DRIVE","authors":"A. Laguidi, A. Hazzab, O. Boughazi, M. Habbab","doi":"10.15546/AEEI-2019-0013","DOIUrl":"https://doi.org/10.15546/AEEI-2019-0013","url":null,"abstract":"","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43618321","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
OPTIMIZATION OF THE ELECTRICAL NETWORK BY THE ANT COLONY METHOD 基于蚁群算法的电网优化
Acta Electrotechnica et Informatica Pub Date : 2019-03-28 DOI: 10.15546/aeei-2019-0001
S. Bouri, A. Benmansour
{"title":"OPTIMIZATION OF THE ELECTRICAL NETWORK BY THE ANT COLONY METHOD","authors":"S. Bouri, A. Benmansour","doi":"10.15546/aeei-2019-0001","DOIUrl":"https://doi.org/10.15546/aeei-2019-0001","url":null,"abstract":"","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48081033","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
FPWM TECHNIQUE BASED CONVERTER FOR IM DRIVES 基于FPWM技术的IM驱动器转换器
Acta Electrotechnica et Informatica Pub Date : 2019-03-28 DOI: 10.15546/AEEI-2019-0005
H. Benbouhenni, Oran Algeria Ecole Nationale Polytechnique d’Oran Maurice Audin
{"title":"FPWM TECHNIQUE BASED CONVERTER FOR IM DRIVES","authors":"H. Benbouhenni, Oran Algeria Ecole Nationale Polytechnique d’Oran Maurice Audin","doi":"10.15546/AEEI-2019-0005","DOIUrl":"https://doi.org/10.15546/AEEI-2019-0005","url":null,"abstract":"","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45040143","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
COMPARISON OF THE IMPULSE AND M-SEQUENCE UWB RADAR SYSTEMS FOR THE ESTIMATION OF THE WALL THICKNESS 脉冲和m序列超宽带雷达系统壁厚估计的比较
Acta Electrotechnica et Informatica Pub Date : 2019-03-28 DOI: 10.15546/AEEI-2019-0006
M. Repko, J. Gamec
{"title":"COMPARISON OF THE IMPULSE AND M-SEQUENCE UWB RADAR SYSTEMS FOR THE ESTIMATION OF THE WALL THICKNESS","authors":"M. Repko, J. Gamec","doi":"10.15546/AEEI-2019-0006","DOIUrl":"https://doi.org/10.15546/AEEI-2019-0006","url":null,"abstract":"In our laboratory, we developed a simple estimation of the wall thickness by the UWB (Ultra Wide-Band) radar system. The described technique measures the wall thickness in the two steps. The first step is a measurement of the wall relative permittivity. The second step is a reflections localisation and estimation of the wall thickness. The borders of the wall could be detected by the envelope of the received signals. The described technique calculates the signal envelope by the Hilbert transform. Moreover, the relative permittivity of the wall is estimated by the technique developed in our department as well. The effective relative permittivity is calculated from the frequency dependency of relative permittivity. This technique was developed for the impulse radar system. The aim of this article is compare the results from impulse radar system with M-sequence radar system which operates in the time domain as well measuring wall relative permittivity and wall thickness estimation.","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46670224","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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