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Acta Electrotechnica et Informatica最新文献

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Neutron Reflectometry Study of Transformer Oil-Based Magnetic Fluid Under Electric Field 电场作用下变压器油基磁流体的中子反射研究
Acta Electrotechnica et Informatica Pub Date : 2021-12-01 DOI: 10.2478/aei-2021-0004
M. Karpets, M. Rajňák, M. Timko, P. Kopčanský, V. Petrenko, I. Gapon, Ye. N. Kosiachkin
{"title":"Neutron Reflectometry Study of Transformer Oil-Based Magnetic Fluid Under Electric Field","authors":"M. Karpets, M. Rajňák, M. Timko, P. Kopčanský, V. Petrenko, I. Gapon, Ye. N. Kosiachkin","doi":"10.2478/aei-2021-0004","DOIUrl":"https://doi.org/10.2478/aei-2021-0004","url":null,"abstract":"Abstract This paper is focused on characterization of magnetic fluids (MFs) and experimental investigation of interfacial structural changes in transformer oil-based magnetic fluids (TOMFs) under the influence of electric field. Recently, such nanodielectric fluids have been proposed to be used as transformer liquid insulation as the addition of particles seeks to improve the dielectric and thermal properties of the base liquids. Ferrofluids typically respond to electric and magnetic fields and can be easy manipulated by such external fields. By mean of neutron reflectometry (NR), we show impact of the electric field intensity on magnetic nanoparticle aggregates in a dilute (1.8 vol %.) classical ferrofluid.","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":"21 1","pages":"23 - 29"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44058445","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
Canny Edge Detector Algorithm Optimization Using 2D Spatial Separable Convolution 基于二维空间可分离卷积的Canny边缘检测器算法优化
Acta Electrotechnica et Informatica Pub Date : 2021-12-01 DOI: 10.2478/aei-2021-0006
M. Králik, L. Ladanyi
{"title":"Canny Edge Detector Algorithm Optimization Using 2D Spatial Separable Convolution","authors":"M. Králik, L. Ladanyi","doi":"10.2478/aei-2021-0006","DOIUrl":"https://doi.org/10.2478/aei-2021-0006","url":null,"abstract":"Abstract In the case of real-time image processing, it is necessary to determine the computational complexity of the mathematical operations used. Reduction of computational complexity of 2D discrete convolution can be achieved by using a separable convolution. In this article, we focus on the application of a canny edge detector for different types of images. The main goal was to speed up the process of applying the kernel matrix to a given image using a separable convolution. By applying a separable convolution, we compared the duration of the Gaussian filter application, edges detection and the Hysteresis threshold level. Applying a separable convolution should speed up the duration of the 2D Gaussian filter as well as the edge detection. The main variable that interested us was time, but an important factor in the application of the filter and edge detection is the number of operating cycles. The use of a separable convolution should significantly reduce the number of computational cycles and reduces the duration of filter application and detection.","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":"21 1","pages":"36 - 43"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41327754","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
Influence of Multiple Reflows and Surface Finishes on Solder Joint Resistivity 多次回流和表面光洁度对焊点电阻率的影响
Acta Electrotechnica et Informatica Pub Date : 2021-12-01 DOI: 10.2478/aei-2021-0001
Daniel Dzivý, A. Pietrikova, O. Vrublevskaya, M. Shikun
{"title":"Influence of Multiple Reflows and Surface Finishes on Solder Joint Resistivity","authors":"Daniel Dzivý, A. Pietrikova, O. Vrublevskaya, M. Shikun","doi":"10.2478/aei-2021-0001","DOIUrl":"https://doi.org/10.2478/aei-2021-0001","url":null,"abstract":"Abstract The main purpose of this paper is the analysis of the electrical resistivity of solder joints depending on various surface finishes and on the number of reflow processes. The electrical resistivity was determined after 1, 2, 3, 5 and 6 reflow cycles as a replacement for the basic accelerated aging test. In this article, various surface finishes are compared by measuring electrical resistivity of solder joints between two soldering pads. The influence of standard surface finishes (ENIG, Lead HASL, Lead-free HASL, Cu, ImSn) with the new developed surface finish based on SnAg7 is also compared. Measurements show that the electrical resistivity is dependent on surface finish type and the thickness of the solder joint. The results prove that the new developed surface finish based on SnAg7 is stable against multiple reflows and comparable to the surface finish based on Au. The new developed surface finish based on SnAg7 can be recommended as a replacement for other conventional surface finishes.","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":"21 1","pages":"3 - 8"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44374513","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
Towards Program Comprehension: Knowledge Profiles for C Programmers 走向程序理解:C程序员的知识概要
Acta Electrotechnica et Informatica Pub Date : 2021-12-01 DOI: 10.2478/aei-2021-0005
E. Pietriková
{"title":"Towards Program Comprehension: Knowledge Profiles for C Programmers","authors":"E. Pietriková","doi":"10.2478/aei-2021-0005","DOIUrl":"https://doi.org/10.2478/aei-2021-0005","url":null,"abstract":"Abstract Following up on the issue of programmer knowledge profiles, the present article deals with the generation of profiles for C language programmers. The main idea is based on static analysis of source codes, assembling the most significant data about their author. Such a profile can point out some abilities and habits of the programmer. The process of static analysis applies methods and techniques of size metrics, complexity metrics, and clone detection. We also present an experiment focused on novice programmers. The results show that knowledge profiles provide an easy way of novice programmers’ progress tracking. The main contribution is believed to be in the area of program comprehension.","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":"21 1","pages":"30 - 35"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43831714","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
Neural Network Architecture for EEG Based Speech Activity Detection 基于脑电的语音活动检测的神经网络结构
Acta Electrotechnica et Informatica Pub Date : 2021-12-01 DOI: 10.2478/aei-2021-0002
M. Koctúrová, J. Juhár
{"title":"Neural Network Architecture for EEG Based Speech Activity Detection","authors":"M. Koctúrová, J. Juhár","doi":"10.2478/aei-2021-0002","DOIUrl":"https://doi.org/10.2478/aei-2021-0002","url":null,"abstract":"Abstract In this paper, research focused on speech activity detection using brain EEG signals is presented. In addition to speech stimulation of brain activity, an innovative approach based on the simultaneous stimulation of the brain by visual stimuli such as reading and color naming has been used. Designing the solution, classification using two types of artificial neural networks were proposed: shallow Feed-forward Neural Network and deep Convolutional Neural Network. Experimental results of classification demonstrated F1 score 79.50% speech detection using shallow neural network and 84.39% speech detection using deep neural network based on cross-evaluated classification models.","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":"21 1","pages":"9 - 13"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48708211","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
Modeling, Analysis and Control of the Compass Gait Biped Robot and Extensions: A Review 指南针步态双足机器人及其扩展的建模、分析和控制综述
Acta Electrotechnica et Informatica Pub Date : 2021-12-01 DOI: 10.2478/aei-2021-0003
A. Jadlovská, S. Jadlovska, L. Koska
{"title":"Modeling, Analysis and Control of the Compass Gait Biped Robot and Extensions: A Review","authors":"A. Jadlovská, S. Jadlovska, L. Koska","doi":"10.2478/aei-2021-0003","DOIUrl":"https://doi.org/10.2478/aei-2021-0003","url":null,"abstract":"Abstract This paper gives a review of recent results in the field of modeling and control of hybrid walking systems with a particular focus on the Compass Gait model. Since dynamic models of biped robots are hybrid in nature, the paper presents an overview of modeling the continuous and discrete dynamics of a hybrid system representing a walking robot. The paper briefly describes the design evolution in underactuated bipedal robots and presents several prominent prototypes, explains a number of related concepts and lists a variety of suitable control techniques.","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":"21 1","pages":"14 - 22"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46125891","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
NOVEL SOFTWARE IN MATLAB DESIGNED FOR UWB SENSOR-BASED LOCALIZATION OF PEOPLE IN 2D AND 3D SPACE MATLAB中基于超宽带传感器的二维和三维人体定位新软件的设计
Acta Electrotechnica et Informatica Pub Date : 2021-10-11 DOI: 10.15546/aeei-2021-0010
M. Švingál, D. Kocur, Jana Fortes
{"title":"NOVEL SOFTWARE IN MATLAB DESIGNED FOR UWB SENSOR-BASED LOCALIZATION OF PEOPLE IN 2D AND 3D SPACE","authors":"M. Švingál, D. Kocur, Jana Fortes","doi":"10.15546/aeei-2021-0010","DOIUrl":"https://doi.org/10.15546/aeei-2021-0010","url":null,"abstract":"Detection, localization, and tracking of people in 2D or 3D space using Ultra-wideband (UWB) short-range sensors is a subject of worldwide intensive research. In this paper, we describe a proposal for a novel software called UWB-PerLoc-2D3D. This software has been created in a MATLAB programming environment and designed to process UWB radar signals for the purpose of movement monitoring of human targets in 2D and 3D space. We present an evaluation of the proposed software properties as well as examples of its utilization in practice.","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41410553","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
DESIGN OF ANTENNAS FOR HYBRID FSO/RF TRANSMISSION SYSTEM FSO/RF混合传输系统天线的设计
Acta Electrotechnica et Informatica Pub Date : 2021-10-11 DOI: 10.15546/aeei-2021-0012
Maroš Lapčák, Ľ. Ovseník, Jakub Oravec, Norbert Zdravecký
{"title":"DESIGN OF ANTENNAS FOR HYBRID FSO/RF TRANSMISSION SYSTEM","authors":"Maroš Lapčák, Ľ. Ovseník, Jakub Oravec, Norbert Zdravecký","doi":"10.15546/aeei-2021-0012","DOIUrl":"https://doi.org/10.15546/aeei-2021-0012","url":null,"abstract":"The purpose of this publication is to create and correctly analyse a secondary RF line for a hybrid FSO/RF system. Since we want to ensure almost 100% functionality, the design of a secondary RF line is very important. In our case, we have chosen two types of antennas. First, it was a helical antenna that achieves a high level of efficiency and much smaller dimensions compared to horn antennas. The second type was just a horn antenna. Its advantages are high efficiency, high gain, and narrow width of radiation angle. However, large disadvantages are dimensions and the price of these antennas. However, in both cases, we can say that these antennas are suitable for deployment to our hybrid FSO/RF system.","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41878008","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
32-CHANNEL DWDM SYSTEM WITH DIFFERENT AMPLIFIERS AND MODULATIONS 32通道DWDM系统与不同的放大器和调制
Acta Electrotechnica et Informatica Pub Date : 2021-10-11 DOI: 10.15546/aeei-2021-0011
Norbert Zdravecký, Ľ. Ovseník, Jakub Oravec, Maroš Lapčák
{"title":"32-CHANNEL DWDM SYSTEM WITH DIFFERENT AMPLIFIERS AND MODULATIONS","authors":"Norbert Zdravecký, Ľ. Ovseník, Jakub Oravec, Maroš Lapčák","doi":"10.15546/aeei-2021-0011","DOIUrl":"https://doi.org/10.15546/aeei-2021-0011","url":null,"abstract":"Wavelength Division Multiplexing is a technology that has enabled the transmission of huge amounts of data at high transfer rates over a single optical fiber. The capacity of an optical channel is usually affected by the shape of signal, nonlinear characteristics and dispersion. In this article, we focus on the DWDM system, optical amplifiers, and optical modulations in 32-channel DWDM system, which was designed in the OptiSystem program. We evaluate the parameters BER (Bit Error Rate) and Q factor for 40 Gb/s systems with changing amplifiers.","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42223631","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
INFLUENCE OF THERMAL STRESS RATE ON CHANGES IN ELECTRICAL INSULATING OILS 热应力率对电绝缘油变化的影响
Acta Electrotechnica et Informatica Pub Date : 2021-10-11 DOI: 10.15546/aeei-2021-0008
Peter Havran, R. Cimbala, J. Kurimský, J. Király, V. Kohan, J. Humeník
{"title":"INFLUENCE OF THERMAL STRESS RATE ON CHANGES IN ELECTRICAL INSULATING OILS","authors":"Peter Havran, R. Cimbala, J. Kurimský, J. Király, V. Kohan, J. Humeník","doi":"10.15546/aeei-2021-0008","DOIUrl":"https://doi.org/10.15546/aeei-2021-0008","url":null,"abstract":"This work solves the comparison of two different thermal stress times for selected liquid insulation materials based on transformer oils by impedance spectroscopy. Research is focused on actual and progressive liquid insulation materials. The scientific objectives of the experiment are focused on the determination of hypotheses, defined by predictable electrophysical parameters in experimental conditions, which are described in the analysis of the measured results.","PeriodicalId":31657,"journal":{"name":"Acta Electrotechnica et Informatica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44123168","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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