{"title":"Outlier detection in distribution companies business using real data set","authors":"Merisa Golic, E. Žunić, D. Donko","doi":"10.1109/EUROCON.2019.8861526","DOIUrl":"https://doi.org/10.1109/EUROCON.2019.8861526","url":null,"abstract":"Outlier detection represents the problem of finding patterns in data that does not fit in expected behaviour. In this paper, outlier detection is done over real transactional data set of the distribution company. Outlier detection is done over time-series data, and over an ordered number of products that can be found within transactions. Unsupervised techniques and methods, S-H-ESD and LOF, are applied because data set is unlabelled. Implementation is performed in R language, and web application dashboard using R Shiny is made. Based on collected results, a proposal for creating the outlier detection and prevention system is made, and ideas for further improvements and additional analysis are given.","PeriodicalId":232097,"journal":{"name":"IEEE EUROCON 2019 -18th International Conference on Smart Technologies","volume":"179 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131399799","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}
{"title":"Random Number Generators Based on Discrete-time Chaotic Maps","authors":"Salih Ergün, Sercan Tanriseven","doi":"10.1109/EUROCON.2019.8861859","DOIUrl":"https://doi.org/10.1109/EUROCON.2019.8861859","url":null,"abstract":"A novel tent map based random number generator(RNG) is introduced. Feasibility verification results from the experiment and simulation, show that the generated binary sequence fulfill statistical randomness tests without post processing, are presented. In the proposed RNG, bit sequences are produced by analyzing the distribution of the underlying signal. The proposed design can be applied for the other discrete-time chaotic maps and can be implemented in the integrated circuit.","PeriodicalId":232097,"journal":{"name":"IEEE EUROCON 2019 -18th International Conference on Smart Technologies","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134488959","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}
{"title":"Predicting Social Network Users with Depression from Simulated Temporal Data","authors":"Akkapon Wongkoblap, Miguel A. Vadillo, V. Curcin","doi":"10.1109/EUROCON.2019.8861514","DOIUrl":"https://doi.org/10.1109/EUROCON.2019.8861514","url":null,"abstract":"Mental health issues are widely accepted as one of the most prominent health challenges in the world, with over 300 million people currently suffering from depression alone. With massive volumes of user-generated data on social networking platforms, researchers are increasingly using machine learning to determine whether this content can be used to detect mental health problems in users. This study aims to investigate whether training a predictive model with multiple instance learning (MIL) via Long Short-Term Memory (LSTM) and gated recurrent unit (GRU) can improve the performance of a predictive model to detect social network users with depression. The power of MIL is to learn from user-level labels to identify post-level labels. By combining every possibility of posts label category, it can generate temporal posting profiles which can then be used to classify users with depression. This study highlights that training a MIL model via LSTM and GRU can improve the accuracy of a MIL model trained with convolutional neural networks.","PeriodicalId":232097,"journal":{"name":"IEEE EUROCON 2019 -18th International Conference on Smart Technologies","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127734734","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}
T. Devaja, D. Bajović, D. Vukobratović, G. Gardasevic
{"title":"Scheduling in 6TiSCH Networks via Max-Product Message-Passing","authors":"T. Devaja, D. Bajović, D. Vukobratović, G. Gardasevic","doi":"10.1109/EUROCON.2019.8861979","DOIUrl":"https://doi.org/10.1109/EUROCON.2019.8861979","url":null,"abstract":"Industrial Internet of Things (IoT) wireless solutions are getting increased attention both in research and industry due to proliferation of low cost IoT solutions and benefits of massive data collection and analysis. One of the recently proposed solutions for IIoT is the 6TiSCH (IPv6 over the TSCH mode of IEEE 802. 15.4e) protocol stack. However, efficient design of 6TiSCH protocol, and in particular, scheduling strategies that would maintain both high throughput and network reliability, is an open problem. In this paper, we provide an initial study of how this problem can be modelled and solved using the probabilistic graphical models framework and adjoined message-passing methods. In particular, we represent the scheduling problem as the maximum weighted independent set (MWIS) problem, which is generally known to be NP-hard, and solve it approximately but efficiently using the message-passing max-product belief propagation (BP) method. The proposed method is described in detail and demonstrated on a toy example of an IEEE 802. 15.4e network.","PeriodicalId":232097,"journal":{"name":"IEEE EUROCON 2019 -18th International Conference on Smart Technologies","volume":"57 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128635080","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}
D. Pavković, Mihael Cipek, Filip Plavac, Pavle Sprljan, Goran Jurisic
{"title":"Damping Optimum Tuning of Drill-string Torque-based Torsional Vibrations Suppression System","authors":"D. Pavković, Mihael Cipek, Filip Plavac, Pavle Sprljan, Goran Jurisic","doi":"10.1109/EUROCON.2019.8861990","DOIUrl":"https://doi.org/10.1109/EUROCON.2019.8861990","url":null,"abstract":"The paper presents the design methodology and experimental verification of petroleum drilling system aimed at effective suppression of drill-string torsional vibrations. The vibration suppression system is based on the external damping feedback loop featuring a simple drill-string torque estimator and a reference correction term in the speed target path. The feedback control system design is based on the damping optimum criterion, which results in straightforward analytical expressions for controller parameters. The overall control system is also extended with drill-string drive back-spinning prevention system which detects the hazardous stuck drill-string conditions and timely initiates drill-string unwinding and safe drive stopping. The effectiveness of the proposed control strategy is verified experimentally on a down-scaled laboratory setup.","PeriodicalId":232097,"journal":{"name":"IEEE EUROCON 2019 -18th International Conference on Smart Technologies","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128576896","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}
{"title":"Application of New Generation Reliability Importance Factors in Power Systems","authors":"M. Čepin","doi":"10.1109/EUROCON.2019.8861879","DOIUrl":"https://doi.org/10.1109/EUROCON.2019.8861879","url":null,"abstract":"Introduction of more and more intermittent power sources to the power systems may affect the power system reliability. The objective of the paper is to develop the reliability importance measures, which would identify which power plants contribute more and which less to the power system reliability. The loss of load expectation relative increase factor for certain power plant shows how much the loss of load expectation is increased in the case if this power plant would become totally unavailable. The loss of load expectation relative decrease factor for certain power plant shows how much the loss of load expectation is decreased in the case if this power plant would become totally available. The importance factors have been developed and evaluated on a case study of small example power system. The results show the importance factors for specific generators in the power system. The deficiency of the approach is that the importance factors cannot represent the operation regime of the power plants, which follow the daily load diagram.","PeriodicalId":232097,"journal":{"name":"IEEE EUROCON 2019 -18th International Conference on Smart Technologies","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127217858","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}
Nemanja Savic, V. Katić, B. Dumnic, D. Milićević, Z. Čorba, N. Katic
{"title":"Cost-benefit analysis of the application of a distributed energy sources in the university campus microgrid proposal","authors":"Nemanja Savic, V. Katić, B. Dumnic, D. Milićević, Z. Čorba, N. Katic","doi":"10.1109/EUROCON.2019.8861936","DOIUrl":"https://doi.org/10.1109/EUROCON.2019.8861936","url":null,"abstract":"This paper presents a cost-benefit analysis (CBA) of the justification of the proposal for a university campus microgrid (UCMG) based on different types of distributed energy sources (DESs) built and planned at the Faculty of Technical Sciences Novi Sad (FTN NS). The UCMG “FTN-NS“ proposal is based on the application of distributed generator technologies that represent 2 photovoltaic (PV) power plants, 1 wind power plant, 1 combined heat and power plant, a technology of distributed energy storage systems that represents a battery energy storage system, devices for connection, operation and control of the microgrid, and electricity consumers. The CBA calculates the technical and ecological parameters of the case study UCMG ”FTN-NS” taking into account 5 different scenarios in terms of changing economic conditions and factors. In order to verify the justification of the implementation of the UCMG proposal, the verification of the scientific-technological aspects of the application of different DESs, and the obtaining of as much as possible CBA analysis, the potentials of renewable energy sources (RES) in the Republic of Serbia are processed, analyzed and presented, technical conditions and technical recommendations connection of small power plants to the main distribution grid, and economic mechanisms for stimulating the production of electricity from various RES.","PeriodicalId":232097,"journal":{"name":"IEEE EUROCON 2019 -18th International Conference on Smart Technologies","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127398082","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}
{"title":"Comparative EMF monitoring campaign over the campus area of the University of Novi Sad","authors":"D. Kljajić, N. Djuric, K. Kasas-Lazetic","doi":"10.1109/EUROCON.2019.8861562","DOIUrl":"https://doi.org/10.1109/EUROCON.2019.8861562","url":null,"abstract":"The number of artificial electromagnetic fields (EMF) sources is continuously growing due to pronounced technological development in a last few decades. Increased amount of this kind of the non-ionizing radiation in the environment is accompanied with the population fear about possible negative health effects due to exposure. Therefore, EMF level measurements in the highly sensitive areas, like as University campuses, are being performed. The initial monitoring campaign over the University of Novi Sad campus area was carried out during 2012, over ten carefully selected locations. With the objective to investigate new situations and compare the measurement results, the newest monitoring campaign was performed during 2018. Recently acquired results indicate to a slight increase of the electric field strength values, as well as population exposure, at all ten locations. Despite that increase, the electric field strength values are still much lower than the prescribed reference levels. The performed comparative analysis confirmed that campus area can be considered as a zone with low EMF pollution.","PeriodicalId":232097,"journal":{"name":"IEEE EUROCON 2019 -18th International Conference on Smart Technologies","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126015685","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}
Kiril Demerdziev, M. Cundeva-Blajer, V. Dimchev, M. Srbinovska, Z. Kokolanski
{"title":"Defining an Uncertainty Budget in Electrical Power and Energy Reference Standards Calibration","authors":"Kiril Demerdziev, M. Cundeva-Blajer, V. Dimchev, M. Srbinovska, Z. Kokolanski","doi":"10.1109/EUROCON.2019.8861600","DOIUrl":"https://doi.org/10.1109/EUROCON.2019.8861600","url":null,"abstract":"In the paper, calibration procedures for testing and examination of electrical power and energy reference standards are presented. The main focus of the work is definition and evaluation of all influencing factors that affect one calibration procedure, and which are a reason for error and uncertainty existence. Some of the influencing factors have negligible effect on the measurements, nevertheless they are about to be mentioned and mathematically evaluated. In the end, a case study with practical considerations is presented.","PeriodicalId":232097,"journal":{"name":"IEEE EUROCON 2019 -18th International Conference on Smart Technologies","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126532059","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}
{"title":"Beam-Steering in Metamaterials Enhancing Gain of Patch Array Antenna Using Phase Shifters for 5G Application","authors":"Solomon Mingle, Ihab Hassoun, W. Kamali","doi":"10.1109/EUROCON.2019.8861926","DOIUrl":"https://doi.org/10.1109/EUROCON.2019.8861926","url":null,"abstract":"This article investigates how beam steering makes the antenna intelligent by increasing channel capacity, range, and reducing interference to enhance the gain of a rectangular patch array antenna for the 5G application using a novel double negative metamaterial (DNG). Beam-steering antennas are the ideal solution for a variety of system applications; it is mostly achieved using phased arrays, where phase shifters are used to control the main-beam. In this paper, the pin-diode phase shifters were considered. ”ON” and ”OFF” states provide phase shift due to different current paths. The main beam direction can be switched between the angles of 25 degrees with a 3dB beamwidth of 23 degrees. The metamaterial structure is composed of 8x8 mm on Rogers RT/duroid 5880 with 0. 254mm thickness and dielectric constant of 2.2. The proposed phase array antenna has four microstrip patch with a thickness of 0. 0175mm printed on the same Rogers RT-duroid substrate with a dielectric constant of 2.2 with dimensions of 5.40 mm x3.94 mm. The phased array antenna without metamaterial structure presented a directivity of 14. 8dBi.Gain increase to 16. 6dBi upon placing the metamaterial structure at a distance 24. 3mm.","PeriodicalId":232097,"journal":{"name":"IEEE EUROCON 2019 -18th International Conference on Smart Technologies","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123186842","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}