Pub Date : 2020-09-16DOI: 10.1109/ET50336.2020.9238243
Bodan Velkovski, Z. Kokolanski
This paper will present the development and realization of a LabVIEW virtual instrument for generation of power quality disturbances. The developed signal generator has the ability to generate signals of various durations containing different types and combinations of power quality disturbances, as well as the ability for their real-time hardware reproduction and logging. The paper will describe the mathematical model, programming architecture and signal generation technique used for the realization of the generator.
{"title":"A Virtual Signal Generator for Real-Time Generation of Power Quality Disturbances","authors":"Bodan Velkovski, Z. Kokolanski","doi":"10.1109/ET50336.2020.9238243","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238243","url":null,"abstract":"This paper will present the development and realization of a LabVIEW virtual instrument for generation of power quality disturbances. The developed signal generator has the ability to generate signals of various durations containing different types and combinations of power quality disturbances, as well as the ability for their real-time hardware reproduction and logging. The paper will describe the mathematical model, programming architecture and signal generation technique used for the realization of the generator.","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121197309","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 : 2020-09-16DOI: 10.1109/ET50336.2020.9238293
H. Aniktar
The Passive Intermodulation (PIM) phenomenon occurs because of non-linearities in antennas or passive components. When data rates are increasing in next generation communication systems like in 4G and 5G, PIM is getting even crucial and costly problem. Unwanted harmonics and intermodulation products might occur in communication band and this can take down the communication network. The main reasons of PIM are metal-oxide junctions because of oxidation and corrosion and metal-metal junctions because of different and irregular metal contact surfaces. This work presents PIM mechanisms, design considerations to eliminate PIM effects and PIM measurement test setups for any communication standards (2G, 3G, 4G, and 5G).
{"title":"Passive Intermodulation Effect on Antennas and Passive Components","authors":"H. Aniktar","doi":"10.1109/ET50336.2020.9238293","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238293","url":null,"abstract":"The Passive Intermodulation (PIM) phenomenon occurs because of non-linearities in antennas or passive components. When data rates are increasing in next generation communication systems like in 4G and 5G, PIM is getting even crucial and costly problem. Unwanted harmonics and intermodulation products might occur in communication band and this can take down the communication network. The main reasons of PIM are metal-oxide junctions because of oxidation and corrosion and metal-metal junctions because of different and irregular metal contact surfaces. This work presents PIM mechanisms, design considerations to eliminate PIM effects and PIM measurement test setups for any communication standards (2G, 3G, 4G, and 5G).","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127114319","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 : 2020-09-16DOI: 10.1109/ET50336.2020.9238263
Maya P. Todorova, Ginka Marinova
Malignant diseases are among the leading causes of mortality. The registration of malignant diseases in Bulgaria is mandatory. The information from the National Cancer Registry about the registered patients, their psychosocial distress and the medical establishments provides an opportunity to conduct research with machine learning methods on a large volume of data. The study aims to apply three machine learning algorithms - CHART, Boosting and Bagging to create classification models for determining the rating of a medical institution and the level of distress of a patient. We present results obtained in a comparative study of different classification methods.
{"title":"Methods of Machine Learning in Oncology","authors":"Maya P. Todorova, Ginka Marinova","doi":"10.1109/ET50336.2020.9238263","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238263","url":null,"abstract":"Malignant diseases are among the leading causes of mortality. The registration of malignant diseases in Bulgaria is mandatory. The information from the National Cancer Registry about the registered patients, their psychosocial distress and the medical establishments provides an opportunity to conduct research with machine learning methods on a large volume of data. The study aims to apply three machine learning algorithms - CHART, Boosting and Bagging to create classification models for determining the rating of a medical institution and the level of distress of a patient. We present results obtained in a comparative study of different classification methods.","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"12 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127819366","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 : 2020-09-16DOI: 10.1109/ET50336.2020.9238218
Ginka Marinova, Maya P. Todorova
The subject of analysis and research is data in the field of medical oncology through machine learning methods. The types of classification in machine learning are presented, and three methods are described - K-Nearest Neighbors, Naive Bayes Classifier, Support Vector Machines. Two classification tasks in the field of medicine have been formulated, implemented, and researched. Classifiers are created and trained with the methods KNN, SVM, and NBC. The solved classification tasks aim to support patients and clinical psycho-oncologists.
{"title":"Classification Tasks Solving with Machine Learning Methods","authors":"Ginka Marinova, Maya P. Todorova","doi":"10.1109/ET50336.2020.9238218","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238218","url":null,"abstract":"The subject of analysis and research is data in the field of medical oncology through machine learning methods. The types of classification in machine learning are presented, and three methods are described - K-Nearest Neighbors, Naive Bayes Classifier, Support Vector Machines. Two classification tasks in the field of medicine have been formulated, implemented, and researched. Classifiers are created and trained with the methods KNN, SVM, and NBC. The solved classification tasks aim to support patients and clinical psycho-oncologists.","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130501905","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 : 2020-09-16DOI: 10.1109/ET50336.2020.9238326
Dimitar D. Arnaudov
The paper presents comparison of a five-phase and a six-phase converter for charging energy storage elements - batteries and supercapacitors. The converters are structured as modules made of five or six units working on a common load. Models of five-phase and six-phase converter are made in LTSpice software. In this research a spectral analysis is performed of the load current when currents amplitude of each source changes. The comparison is made for the same output power.
{"title":"Comparative Analysis of Multiphase Topology for Energy Storage Systems","authors":"Dimitar D. Arnaudov","doi":"10.1109/ET50336.2020.9238326","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238326","url":null,"abstract":"The paper presents comparison of a five-phase and a six-phase converter for charging energy storage elements - batteries and supercapacitors. The converters are structured as modules made of five or six units working on a common load. Models of five-phase and six-phase converter are made in LTSpice software. In this research a spectral analysis is performed of the load current when currents amplitude of each source changes. The comparison is made for the same output power.","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134394738","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 : 2020-09-16DOI: 10.1109/ET50336.2020.9238254
S. Biliderov, M. Kambushev, K. Kambushev, A. Marinov, R. Dimitrova
In the proposed development, a modeling of the operation of the NAVSTAR-GPS system, determining the positions of the satellites and the distances to them is made. The information obtained in this way is entered into the computer for control of an autonomous unmanned aerial vehicle, and the data of the satellites that have failed from the working constellation are replaced with those from the model. The main goal is to improve the accuracy and reliability in piloting and navigation of unmanned aerial vehicles.
{"title":"Recovery of GPS Disability to Unmanned Aircrafts by System Modeling","authors":"S. Biliderov, M. Kambushev, K. Kambushev, A. Marinov, R. Dimitrova","doi":"10.1109/ET50336.2020.9238254","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238254","url":null,"abstract":"In the proposed development, a modeling of the operation of the NAVSTAR-GPS system, determining the positions of the satellites and the distances to them is made. The information obtained in this way is entered into the computer for control of an autonomous unmanned aerial vehicle, and the data of the satellites that have failed from the working constellation are replaced with those from the model. The main goal is to improve the accuracy and reliability in piloting and navigation of unmanned aerial vehicles.","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133247186","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 : 2020-09-16DOI: 10.1109/ET50336.2020.9238160
E. Trichkova-Kashamova
The correct selection of the methodology for the construction of an information system is essential for its effective functioning. The final results depend on what stages, techniques, and means will be used and in what sequence they will be applied. The present paper focuses on improving the characteristics of the information systems based on the solutions of optimization problems satisfying the requirements of the established world standard for quality assessment. The potential for improvement is based on a real educational information system. Quantitative evaluation of system parameters by using a quality assessment approach based on ISO/IEC 25010:2011 standard is illustrated. Results of the solution of an optimization problem about quality standard criteria are presented.
{"title":"Application of quality optimization approach of information systems in education","authors":"E. Trichkova-Kashamova","doi":"10.1109/ET50336.2020.9238160","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238160","url":null,"abstract":"The correct selection of the methodology for the construction of an information system is essential for its effective functioning. The final results depend on what stages, techniques, and means will be used and in what sequence they will be applied. The present paper focuses on improving the characteristics of the information systems based on the solutions of optimization problems satisfying the requirements of the established world standard for quality assessment. The potential for improvement is based on a real educational information system. Quantitative evaluation of system parameters by using a quality assessment approach based on ISO/IEC 25010:2011 standard is illustrated. Results of the solution of an optimization problem about quality standard criteria are presented.","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133384916","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 : 2020-09-16DOI: 10.1109/ET50336.2020.9238295
Stefan Hensel, M. Marinov, Max Schmitt
A novel approach for synchronization and calibration of a camera and an inertial measurement unit (IMU) in the research-oriented visual-inertial mapping-and localization-framework maplab is presented. Mapping and localization are based on detecting different features in the environment. In addition to the possibility of creating single-case maps, the included algorithms allow merging maps to increase mapping accuracy and obtain large-scale maps. Furthermore, the algorithms can be used to optimize the collected data. The preliminary results show that after appropriate calibration and synchronization maplab can be used efficiently for mapping, especially in rooms and small building environments.
{"title":"System Setup for Synchronized Visual-Inertial Localization and Mapping","authors":"Stefan Hensel, M. Marinov, Max Schmitt","doi":"10.1109/ET50336.2020.9238295","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238295","url":null,"abstract":"A novel approach for synchronization and calibration of a camera and an inertial measurement unit (IMU) in the research-oriented visual-inertial mapping-and localization-framework maplab is presented. Mapping and localization are based on detecting different features in the environment. In addition to the possibility of creating single-case maps, the included algorithms allow merging maps to increase mapping accuracy and obtain large-scale maps. Furthermore, the algorithms can be used to optimize the collected data. The preliminary results show that after appropriate calibration and synchronization maplab can be used efficiently for mapping, especially in rooms and small building environments.","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124326060","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 : 2020-09-16DOI: 10.1109/ET50336.2020.9238197
D. Stoyanova, S. Stoyanova-Petrova, N. Kafadarova, N. Mileva, N. Vakrilov
This paper presents the pilot results from teaching “Thermal management of electronic equipment” course at the University of Plovdiv. The course curriculum is prepared together with business. The results are positive: students highly evaluated the quality and relevance of the course and showed “very good” average score from the training in DIPSEIL. During the pilot PhD students developed thermal models of a real electronic system. Business representatives highly evaluated these models which is indicative of the quality of the course.
{"title":"Pilot Results from University – Business Collaboration in Teaching “Thermal Management of Electronic Equipment” Course","authors":"D. Stoyanova, S. Stoyanova-Petrova, N. Kafadarova, N. Mileva, N. Vakrilov","doi":"10.1109/ET50336.2020.9238197","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238197","url":null,"abstract":"This paper presents the pilot results from teaching “Thermal management of electronic equipment” course at the University of Plovdiv. The course curriculum is prepared together with business. The results are positive: students highly evaluated the quality and relevance of the course and showed “very good” average score from the training in DIPSEIL. During the pilot PhD students developed thermal models of a real electronic system. Business representatives highly evaluated these models which is indicative of the quality of the course.","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122569743","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 : 2020-09-16DOI: 10.1109/ET50336.2020.9238345
D. G. Vrachkov, D. Todorov
The paper aims to examine the main architectures used for Firmware Over The Air (FOTA) and Wireless Diagnostic In the vehicles. The main problems in creating a system of this type will be considered. Proposals will be made for price optimization of systems of a similar type. The main points at which systems of this type should provide a higher degree of information protection and encryption will also be considered. Some suggestions for optimizing the memory and from there again optimizing the price of the devices will be considered. Finally, a review of wireless car diagnostics will be based on a common FOTA system.
本文的目的是研究用于固件Over The Air (FOTA)和车载无线诊断的主要架构。本文将讨论建立这类系统的主要问题。对同类系统的价格优化提出建议。本文还将讨论这类系统应在哪些方面提供更高程度的信息保护和加密。一些优化内存的建议，并从那里再次优化设备的价格将被考虑。最后，对基于通用FOTA系统的无线汽车诊断进行综述。
{"title":"Research of the systems for Firmware Over The Air (FOTA) and Wireless Diagnostic in the new vehicles","authors":"D. G. Vrachkov, D. Todorov","doi":"10.1109/ET50336.2020.9238345","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238345","url":null,"abstract":"The paper aims to examine the main architectures used for Firmware Over The Air (FOTA) and Wireless Diagnostic In the vehicles. The main problems in creating a system of this type will be considered. Proposals will be made for price optimization of systems of a similar type. The main points at which systems of this type should provide a higher degree of information protection and encryption will also be considered. Some suggestions for optimizing the memory and from there again optimizing the price of the devices will be considered. Finally, a review of wireless car diagnostics will be based on a common FOTA system.","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128464284","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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