Pub Date : 2023-03-23DOI: 10.1109/ATEE58038.2023.10108192
Tudorita Zaharia, G. Danciu, Iulia Ilie, I. Nicolae, S. Nechifor
This paper introduces a straightforward and computationally inexpensive approach to classifying heartbeat anomalies based on ECG signals. Cardiac arrests are often associated with irregular heart rhythm, making arrythmia a major factor to cardiac events when not sufficiently monitored. In this context, the current paper presents a comprehensive analysis and arrythmia prediction for 44 patients. For each patient in the study, heartrate signals manually labeled by physicians were available. The preprocessed time-series were used to train machine learning models available in various automated frameworks, allowing for accurate binary classification. The highest scores after benchmarking were obtained by LightGBM. Our proposed method provides similar results in terms of classification performance with state-of-the-art algorithms for arrythmia detection. The current work thus introduces a simplified pipeline, improvement in prediction time and classification accuracy.
{"title":"A simplified Approach for Accurate Arrythmia Detection using Automated Machine Learning","authors":"Tudorita Zaharia, G. Danciu, Iulia Ilie, I. Nicolae, S. Nechifor","doi":"10.1109/ATEE58038.2023.10108192","DOIUrl":"https://doi.org/10.1109/ATEE58038.2023.10108192","url":null,"abstract":"This paper introduces a straightforward and computationally inexpensive approach to classifying heartbeat anomalies based on ECG signals. Cardiac arrests are often associated with irregular heart rhythm, making arrythmia a major factor to cardiac events when not sufficiently monitored. In this context, the current paper presents a comprehensive analysis and arrythmia prediction for 44 patients. For each patient in the study, heartrate signals manually labeled by physicians were available. The preprocessed time-series were used to train machine learning models available in various automated frameworks, allowing for accurate binary classification. The highest scores after benchmarking were obtained by LightGBM. Our proposed method provides similar results in terms of classification performance with state-of-the-art algorithms for arrythmia detection. The current work thus introduces a simplified pipeline, improvement in prediction time and classification accuracy.","PeriodicalId":398894,"journal":{"name":"2023 13th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115159292","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 : 2023-03-23DOI: 10.1109/ATEE58038.2023.10108155
Ovidiu Lăudatu, M. Iordache, Marilena Stănculescu, Lavinia Bobaru, D. Niculae, O. Drosu
This paper has the main purpose to present the design of a wireless power transfer system (WPTS) from the practical point of view, from design to implementation phase. Therefore, the following have been considered: design and simulation of a wireless receiver, physical analysis of the wireless receiver circuit, the design of the WPTS and the practical implementation and simulation of the WPTS. By checking the physical functioning of the proposed circuit, one confirms that what has been achieved through simulation and computation is correct. This can easily connect the theoretical aspects to the practical ones in the educational process, in the domain of wireless power transmission.
{"title":"Wireless Power Transmission System Design. A Practical Approach.","authors":"Ovidiu Lăudatu, M. Iordache, Marilena Stănculescu, Lavinia Bobaru, D. Niculae, O. Drosu","doi":"10.1109/ATEE58038.2023.10108155","DOIUrl":"https://doi.org/10.1109/ATEE58038.2023.10108155","url":null,"abstract":"This paper has the main purpose to present the design of a wireless power transfer system (WPTS) from the practical point of view, from design to implementation phase. Therefore, the following have been considered: design and simulation of a wireless receiver, physical analysis of the wireless receiver circuit, the design of the WPTS and the practical implementation and simulation of the WPTS. By checking the physical functioning of the proposed circuit, one confirms that what has been achieved through simulation and computation is correct. This can easily connect the theoretical aspects to the practical ones in the educational process, in the domain of wireless power transmission.","PeriodicalId":398894,"journal":{"name":"2023 13th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125511125","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 : 2023-03-23DOI: 10.1109/ATEE58038.2023.10108224
Partemie-Marian Mutescu, A. Lavric, A. Petrariu, V. Popa
Over the last decade, there has been a significant increase in the demand for wireless sensor applications, in line with the increased connectivity of objects in the Internet of Things concept. As the number of wireless sensors continues to grow, there is a corresponding increase in the demand for spectrum resources which will eventually lead to overcrowding, packet collisions and interference ultimately resulting in a reduction of the wireless sensor network performance level. Obtaining a detailed understanding of the radio spectrum is critical in preventing collisions in wireless sensor networks. This requires knowledge of the level of spectrum occupancy and the specific radio modulation schemes employed, enabling the implementation of effective collision mitigation strategies. This paper proposes a LoRa spreading factor detection scheme based on Convolutional Neural Network (CNN) classification of spectrograms. Our results show that the developed algorithm shows a high degree of performance in detecting radio modulations, both in high SNR and low SNR conditions, resulting in a detection accuracy of over 98%.
{"title":"Deep Learning Enhanced Spectrum Sensing for LoRa Spreading Factor Detection","authors":"Partemie-Marian Mutescu, A. Lavric, A. Petrariu, V. Popa","doi":"10.1109/ATEE58038.2023.10108224","DOIUrl":"https://doi.org/10.1109/ATEE58038.2023.10108224","url":null,"abstract":"Over the last decade, there has been a significant increase in the demand for wireless sensor applications, in line with the increased connectivity of objects in the Internet of Things concept. As the number of wireless sensors continues to grow, there is a corresponding increase in the demand for spectrum resources which will eventually lead to overcrowding, packet collisions and interference ultimately resulting in a reduction of the wireless sensor network performance level. Obtaining a detailed understanding of the radio spectrum is critical in preventing collisions in wireless sensor networks. This requires knowledge of the level of spectrum occupancy and the specific radio modulation schemes employed, enabling the implementation of effective collision mitigation strategies. This paper proposes a LoRa spreading factor detection scheme based on Convolutional Neural Network (CNN) classification of spectrograms. Our results show that the developed algorithm shows a high degree of performance in detecting radio modulations, both in high SNR and low SNR conditions, resulting in a detection accuracy of over 98%.","PeriodicalId":398894,"journal":{"name":"2023 13th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123015725","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 : 2023-03-23DOI: 10.1109/ATEE58038.2023.10108148
Mehmet Karahan, Alperen Dilmen, Furkan Lacinkaya, A. Akay, C. Kasnakoğlu
Track While Scan (TWS) radars are generally used in military systems, constantly monitoring the positions of the target and generating data about it. They measure a target's coordinates, determine its trajectory, and predict its next location. They can usually track a single target but do so with very high sensitivity. "TWS Radar" is often used as a "Fire Control Radar" in the armed forces. This study addresses the design of a TWS radar with MATLAB programming language. The operation of this radar was simulated, and targets were detected using matched filter in MATLAB. Transmitted and received signal parameters are explained. A MATLAB algorithm which generates the transmitted and the received pulses for single Pulse Repetition Interval (PRI) was written in the first step. Match filtering was implemented for detecting targets. A fixed threshold value is defined, and position of the targets are reported with MATLAB algorithm. A white Gaussian noise was added to the output of the matched filter and targets are reported for the same threshold value. Radar was tested under the different Signal to Noise Ratio (SNR) rates. The scope view of the TWS Radar was plotted for 2 degrees antenna beam width for different SNR values.
{"title":"Track While Scan Radar Design and Simulation","authors":"Mehmet Karahan, Alperen Dilmen, Furkan Lacinkaya, A. Akay, C. Kasnakoğlu","doi":"10.1109/ATEE58038.2023.10108148","DOIUrl":"https://doi.org/10.1109/ATEE58038.2023.10108148","url":null,"abstract":"Track While Scan (TWS) radars are generally used in military systems, constantly monitoring the positions of the target and generating data about it. They measure a target's coordinates, determine its trajectory, and predict its next location. They can usually track a single target but do so with very high sensitivity. \"TWS Radar\" is often used as a \"Fire Control Radar\" in the armed forces. This study addresses the design of a TWS radar with MATLAB programming language. The operation of this radar was simulated, and targets were detected using matched filter in MATLAB. Transmitted and received signal parameters are explained. A MATLAB algorithm which generates the transmitted and the received pulses for single Pulse Repetition Interval (PRI) was written in the first step. Match filtering was implemented for detecting targets. A fixed threshold value is defined, and position of the targets are reported with MATLAB algorithm. A white Gaussian noise was added to the output of the matched filter and targets are reported for the same threshold value. Radar was tested under the different Signal to Noise Ratio (SNR) rates. The scope view of the TWS Radar was plotted for 2 degrees antenna beam width for different SNR values.","PeriodicalId":398894,"journal":{"name":"2023 13th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114443888","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 : 2023-03-23DOI: 10.1109/ATEE58038.2023.10108265
Ionut-Marius Mindreanu, A. Morega
Electric networks are structured on different voltage levels and have a finite capacity to transport electricity. As the number of consumers increases, so do electricity transfer problems; in this sense, more attention must be paid to its responsible use. This paper presents determinations of power quality for different types of consumers. The more measurements that can be made, the better the status of an electrical distribution network is known.
{"title":"Monitoring Power Flow in End-user Consumption Systems","authors":"Ionut-Marius Mindreanu, A. Morega","doi":"10.1109/ATEE58038.2023.10108265","DOIUrl":"https://doi.org/10.1109/ATEE58038.2023.10108265","url":null,"abstract":"Electric networks are structured on different voltage levels and have a finite capacity to transport electricity. As the number of consumers increases, so do electricity transfer problems; in this sense, more attention must be paid to its responsible use. This paper presents determinations of power quality for different types of consumers. The more measurements that can be made, the better the status of an electrical distribution network is known.","PeriodicalId":398894,"journal":{"name":"2023 13th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116612572","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 : 2023-03-23DOI: 10.1109/ATEE58038.2023.10108304
Mihail Pîslă, Marilena Stănculescu, R. Porumb, B. Enache, G. Seritan
This paper discusses the use of Field-Programmable Gate Arrays (FPGAs) -based embedded systems to enhance the cyber security of microgrid infrastructure. This may be obtained by shifting the center of critical algorithms execution outside the main processing unit of the target components. The use of FPGAs allow various specific implementation approaches. The modern SoC architectures containing both an FPGA component and an advanced processing system in the same chip might be one of the answers to the cybernetic security enhancement. This solution can be the key in the evolving measurement and control systems used in microgrid terminals and/or data processing points. By narrowing the range of commonly known cyber-attacks, this may represent one of the best solutions to boost the cybernetic security of the measurement and control systems.
{"title":"Microgrid Cyber Security Enhancement Considerations","authors":"Mihail Pîslă, Marilena Stănculescu, R. Porumb, B. Enache, G. Seritan","doi":"10.1109/ATEE58038.2023.10108304","DOIUrl":"https://doi.org/10.1109/ATEE58038.2023.10108304","url":null,"abstract":"This paper discusses the use of Field-Programmable Gate Arrays (FPGAs) -based embedded systems to enhance the cyber security of microgrid infrastructure. This may be obtained by shifting the center of critical algorithms execution outside the main processing unit of the target components. The use of FPGAs allow various specific implementation approaches. The modern SoC architectures containing both an FPGA component and an advanced processing system in the same chip might be one of the answers to the cybernetic security enhancement. This solution can be the key in the evolving measurement and control systems used in microgrid terminals and/or data processing points. By narrowing the range of commonly known cyber-attacks, this may represent one of the best solutions to boost the cybernetic security of the measurement and control systems.","PeriodicalId":398894,"journal":{"name":"2023 13th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124546907","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 : 2023-03-23DOI: 10.1109/ATEE58038.2023.10108186
Ioana Ionică, Mircea Modreanu, A. Morega, Cristian Boboc
This paper aims to present the design of a hybrid-stepper motor by considering two variants from the geometry and material point of view. Numerical simulation is used in the design stages, which helps reach specific performances. The current study approaches the influence of the geometry and materials for the detent and holding torque calculation on a hybrid stepper motor. There are two models, and for each one, numerical analysis is used to calculate the detent and the holding torque versus angle characteristics, and by this, fulfilling the motor requirements towards its applications.
{"title":"Influence Analysis of the Geometry and Materials For the Electromagnetic Torque Calculation on a Stepper Motor","authors":"Ioana Ionică, Mircea Modreanu, A. Morega, Cristian Boboc","doi":"10.1109/ATEE58038.2023.10108186","DOIUrl":"https://doi.org/10.1109/ATEE58038.2023.10108186","url":null,"abstract":"This paper aims to present the design of a hybrid-stepper motor by considering two variants from the geometry and material point of view. Numerical simulation is used in the design stages, which helps reach specific performances. The current study approaches the influence of the geometry and materials for the detent and holding torque calculation on a hybrid stepper motor. There are two models, and for each one, numerical analysis is used to calculate the detent and the holding torque versus angle characteristics, and by this, fulfilling the motor requirements towards its applications.","PeriodicalId":398894,"journal":{"name":"2023 13th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130499438","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 : 2023-03-23DOI: 10.1109/ATEE58038.2023.10108383
Ciprian Mateescu, N. Tanase, Corneliu Balan
Several recent studies have demonstrated the feasibility and utility of trachea CT 3D reconstruction, including its ability to enhance the accuracy and safety of surgical procedures. This paper tries to emphasize on the fabrication of the 3D model of the trachea and on a pioneer study that would put in the spotlight the utility of 3D printing and reconstruction of human respiratory airways. While the fabrication process represents an important step in creating such complex geometries, it is important to understand the post-production procedures and how to apply them to obtain a geometry that will later be used in imaging and experimental simulations.
{"title":"CT Image-Based Segmentation, 3D Reconstruction and SLA Printing of Human Trachea","authors":"Ciprian Mateescu, N. Tanase, Corneliu Balan","doi":"10.1109/ATEE58038.2023.10108383","DOIUrl":"https://doi.org/10.1109/ATEE58038.2023.10108383","url":null,"abstract":"Several recent studies have demonstrated the feasibility and utility of trachea CT 3D reconstruction, including its ability to enhance the accuracy and safety of surgical procedures. This paper tries to emphasize on the fabrication of the 3D model of the trachea and on a pioneer study that would put in the spotlight the utility of 3D printing and reconstruction of human respiratory airways. While the fabrication process represents an important step in creating such complex geometries, it is important to understand the post-production procedures and how to apply them to obtain a geometry that will later be used in imaging and experimental simulations.","PeriodicalId":398894,"journal":{"name":"2023 13th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121289566","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 : 2023-03-23DOI: 10.1109/ATEE58038.2023.10108302
Uriel Vargas, G. Lazaroiu
A major issue in the simulation of frequency dynamics via extended harmonic domain (EHD) –based models are the incurred spurious oscillations due to the lack of correct initial conditions computation during initialization or when a step change, in either source or parameter, occurs. A recent paper has addressed the correct initialization computation for linear time-periodic systems via the dynamic flexible EHD (DFEHD); however, nonlinear systems are not applicable for this methodology. This paper addresses this issue by separating linear and nonlinear parts; then, the DFEHD is applied to the linear part, aimed at initialization purposes, to reduce the impact of the spurious oscillations dynamics. A case study is presented to demonstrate the effectiveness of the proposed approach.
{"title":"Initial Conditions Computation Approximation of Nonlinear Systems using the DFEHD","authors":"Uriel Vargas, G. Lazaroiu","doi":"10.1109/ATEE58038.2023.10108302","DOIUrl":"https://doi.org/10.1109/ATEE58038.2023.10108302","url":null,"abstract":"A major issue in the simulation of frequency dynamics via extended harmonic domain (EHD) –based models are the incurred spurious oscillations due to the lack of correct initial conditions computation during initialization or when a step change, in either source or parameter, occurs. A recent paper has addressed the correct initialization computation for linear time-periodic systems via the dynamic flexible EHD (DFEHD); however, nonlinear systems are not applicable for this methodology. This paper addresses this issue by separating linear and nonlinear parts; then, the DFEHD is applied to the linear part, aimed at initialization purposes, to reduce the impact of the spurious oscillations dynamics. A case study is presented to demonstrate the effectiveness of the proposed approach.","PeriodicalId":398894,"journal":{"name":"2023 13th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"115-116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116309664","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 : 2023-03-23DOI: 10.1109/ATEE58038.2023.10108328
V. Fireteanu
Having as subject of investigation a high power (1 MW) squirrel cage induction motor this paper deals with finite element models step by step in time domain for the detection and evolution of the faults short-circuit in the stator winding, static eccentricity and rotor broken bar. The signatures of these faults in the voltages of coil sensors placed in the motor neighboring are analyzed in order to offer solutions for the noninvasive detection of the fault appearance and of the evolution of faults. The rms values and the amplitudes of the most important harmonics of the voltages of one coil sensor, respectively of two coil sensors series differential connected are investigated in order to establish the best solution for the monitoring of the motor healthy state.
{"title":"Finite Element Analysis of the Noninvasive Detection and Evolution of Faults in a High Power Induction Motor through Neighboring Coil Sensors","authors":"V. Fireteanu","doi":"10.1109/ATEE58038.2023.10108328","DOIUrl":"https://doi.org/10.1109/ATEE58038.2023.10108328","url":null,"abstract":"Having as subject of investigation a high power (1 MW) squirrel cage induction motor this paper deals with finite element models step by step in time domain for the detection and evolution of the faults short-circuit in the stator winding, static eccentricity and rotor broken bar. The signatures of these faults in the voltages of coil sensors placed in the motor neighboring are analyzed in order to offer solutions for the noninvasive detection of the fault appearance and of the evolution of faults. The rms values and the amplitudes of the most important harmonics of the voltages of one coil sensor, respectively of two coil sensors series differential connected are investigated in order to establish the best solution for the monitoring of the motor healthy state.","PeriodicalId":398894,"journal":{"name":"2023 13th International Symposium on Advanced Topics in Electrical Engineering (ATEE)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114775007","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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