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RS485 Network Design and Maintenance in Food Processing Industry: A Winery Application 1

引用

32nd International Conference on Organization and technology of Maintenance, OTO 2023

作者： Kovačević, Ivana Matić, Tomislav Keser, Tomislav Miling, Robert Faculty of Electrical Engineering Computer Science and Information Technology Osijek University of Osijek Kneza Trpimira 2b Osijek31000 Croatia

ISBN: (数字)9783031514944

ISBN: (纸本)9783031514937

The communication networks are widely in use in every aspect of our life, making our environment compliable to the ever-present IoT oriented technocratic society. Good and quality communication enables reliable and representative data transportation service which provides interoperability of various data-processing systems. Majority of industrial processes have some sort of communication topologies used for interconnection of various subsystems, required by their specific operation principles, and often works in harsh and electrically and mechanically unpleasant environment. Presence of electromagnetic noises, electric discharges, strong and high alternating magnetic fields, mechanical and chemical stresses, also environmentally caused impacts on data transportation scheme, cause data corruption and lowers availability and reliability of such network. This paper deals with the problem of design, implementation and verification of RS485 based communication network for multi-nodal data exchange in winery cellars. The wine cellar represents exceptionally harsh environment in aspects of environmental chemical and electrical related conditions. The paper proposes optimal topology among multi-nodal communication devices for an experimental cellar setup, and develop communication protocol for efficient data exchange. Furthermore, a strategy for successful maintenance is also presented through in-protocol and nodal-oriented topology integration. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Wine

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Energy Efficiency Enhancement in a Small Industrial Facility 32nd

Energy Efficiency Enhancement in a Small Industrial Facility

引用

32nd International Conference on Organization and technology of Maintenance, OTO 2023

作者： Kljajić, Ružica Kraus, Zorislav Fekete, Krešimir Marić, Predrag Faculty of Electrical Engineering Computer Science and Information Technology Osijek University of Osijek Kneza Trpimira 2b Osijek31000 Croatia

ISBN: (纸本)9783031514937

Small industrial utilities, connected to the distribution grid, can cause various disturbances that need to be eliminated or mitigated. Due to the complexity of the system and the large number of motors, industrial consumers may have problems with the voltage deviations caused by the excessive amount of reactive energy which is a natural consequence of their operation and construction. Since industrial consumers have to pay for both active and reactive power delivered from the grid, the goal is to reduce those costs as well as to reduce feeder loadings. Delivered energy can be reduced by installing compensation devices or by connecting photovoltaic power plant, which would produce active and reactive energy at the point of consumption. This paper analyzes the power flows and voltage conditions of a small industrial facility in three scenarios: the basic scenario, the second scenario with built-in compensation devices and in the third scenario with integrated photovoltaic power plant. For all three scenarios, power flow analysis is performed and results are presented in the form of tables and graphically. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Energy efficiency

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Genetic Algorithm Based Optimization of Circular Planar Coil Geometry With Homogeneous Magnetic Field Distribution 46

Genetic Algorithm Based Optimization of Circular Planar Coil...

引用

46th ICT and Electronics Convention, MIPRO 2023

作者： Bilandzija, Domagoj Vinko, Davor Filipovic, Luka Computer Science and Information Technology Osijek Faculty of Electrical Engineering Department of Communications Osijek Croatia

ISBN: (纸本)9789532331042

A prominent problem in planar resonant wire-less power transfer (WPT) systems is instability of efficiency and load power due to position misalignment of the receiver (RX) coil relative to postion of the transmitter (TX) coil. In order to keep stable efficiency and load power even in such misaligned condition it is necessary to design transmitter coil which generates homogeneous magnetic field in charging plane. In this paper, a geometry of planar transmitter coil which consist of multiple concentric circles is optimized by utilizing genetic algorithm. optimization goal is achieving as large as possible homogeneous region, i.e. portion of charging plane which is characterized by homogeneous magnetic field. Magnetic field evaluations are done by FEMM software. Proposed coil achieves continuous homogeneous region at 44.4% surface of charging plane. optimized coil and its homogenous region is compared to the state-of-the-art. © 2023 MIPRO Croatian Society.

关键词： Genetic algorithms

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The Impact of Electric Car Charging on the Power Grid 32nd

The Impact of Electric Car Charging on the Power Grid

引用

32nd International Conference on Organization and technology of Maintenance, OTO 2023

作者： Klaić, Zvonimir Đaković, Filip Primorac, Mario Fekete, Krešimir Faculty of Electrical Engineering Computer Science and Information Technology Osijek Kneza Trpimira 2b Osijek31000 Croatia

ISBN: (纸本)9783031514937

In recent years, the number of electric vehicles has been growing rapidly in the European Union, and in the world in general. Electric cars are more efficient than fossil fuel cars, they have better driving characteristics, and most importantly: they do not emit gas while driving. There are still some challenges related to electric cars. Energy storage - batteries - are still under development to increase the range of cars. An even bigger challenge is the car charging infrastructure - charging stations of increasing capacity are being installed to shorten charging times. The growing number of charging stations brings new challenges, and an important question is what impact car charging stations have on the power quality. The paper presents a detailed analysis of the impact of electric car charging stations on the power quality in the distribution power grid. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Power quality

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An Advanced Tactile-Haptic Controller for Smart Home 32nd

An Advanced Tactile-Haptic Controller for Smart Home

引用

32nd International Conference on Organization and technology of Maintenance, OTO 2023

作者： Radić, Miloš Keser, Tomislav Blažević, Damir Faculty of Electrical Engineering Computer Science and Information Technology Osijek University of Osijek Kneza Trpimira 2b Osijek31000 Croatia

ISBN: (纸本)9783031514937

A smart home philosophy strongly relies on a technical principle of automatization almost every aspect of today’s way of living. Sole automation of does not only manage system processes in household, or living environment in general, but all adjacent systems and corresponding subsystems which helps to maintain system-in-whole in operational state. From control of environmental temperature, air conditioning, lighting, utility control, etc., all existing "smart" systems predominantly control actuation part of smart home. Very miniscule "smart" systems do manage and serve human-machine interaction part of it and, if are made "smart", they rely on solutions that utilizes some sort of existing ICT technologies that are mainly optimized for communication and visual presentation, not for in-situ smart home interaction. This paper deals with the problem of development of a tactile-haptic solution for control of smart home specific subsystem and that utilize IoT platform, giving feel and user experience similar to traditional one in form of an advanced switch with regulation ability. Tactile commanding with haptic feedback is presented and applied in smart home temperature regulation. Finally, an IoT platform solution is developed, tactile-haptic relation investigated with optimal solution established, and its functionality is verified as well as is proven in real time environment. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Air conditioning

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Classification of Network Traffic and Anomaly Detection Using Entropy in NetFlow Records 66

Classification of Network Traffic and Anomaly Detection Usin...

引用

66th International Symposium ELMAR, ELMAR 2024

作者： Fosic, Igor Zagar, Drago HEP-Telekomunikacije Osijek Croatia Josip Juraj Strossmayer University of Osijek Faculty of Electrical Engineering Computer Science and Information Technology Osijek Croatia

ISBN: (纸本)9798350375411

Within the field of machine learning and classification techniques, entropy represents a concept with great potential, especially within algorithms like Random Forest. The paper proposes a method for calculating the Shannon entropy of all features within individual NetFlow records in the dataset. By comparing four variations of the LUFlow dataset with and without the entropy feature, the obtained results of the AUC metric and confusion matrix showed improved classification performance using the proposed method for calculating the entropy of NetFlow record features. The suggested approach for calculating the entropy feature demonstrates a greater impact than the entropy feature included in the original LUFlow dataset. © 2024 IEEE.

关键词： classification entropy NetFlow supervised machine learning

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Using Peer Grading to Improve the Objectivity of Grades in GUI Design Courses 65

Using Peer Grading to Improve the Objectivity of Grades in G...

引用

65th International Symposium ELMAR, ELMAR 2023

作者： Romic, Kresimir Leventic, Hrvoje Mandic, Laura Galic, Irena Faculty of Electrical Engineering Computer Science and Information Technology Osijek OsijekHR-31000 Croatia

ISBN: (纸本)9798350325126

This paper deals with examining the possibility of peer grading when ranking graphical user interface (GUI) design images. The assessment was made on real images created by students on a GUI design course. Students' assignments to design a graphical user interface were being subjected to pairwise comparison and ranking was made based on pairwise comparison matrix. Obtained students' ranking was compared to experts' opinion using Spearman's and Kendall's metrics. The results suggest the possibility of using students' peer to peer grades to obtain objective rank from their subjective comparisons. © 2023 IEEE.

关键词： Graphical user interfaces

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MQTT based monitoring and control system for remote stations in automotive industry

MQTT based monitoring and control system for remote stations...

引用

2023 IEEE Zooming Innovation in Consumer Technologies Conference, ZINC 2023

作者： Ivanovic, Denis Job, Josip Puntaric, Marko Herceg, Marijan TTTech-Auto CX Osijek Croatia Faculty of Electrical Engineering Computer Science and Information Technology Department of Software Engineering Osijek Croatia Faculty of Electrical Engineering Computer Science and Information Technology Department of Communications Osijek Croatia

ISBN: (纸本)9798350347722

In this paper is presented implementation of a lightweight supervisory control and data acquisition system for remote test stations as a part of a larger test house in the automotive industry. It is necessary to allow remote set up and monitoring of the test stations, which means defining the structure of a system with numerous test stations as endpoints. The test stations are meant to be virtual machines but can be both virtual and physical machines. A communication protocol must be used that enables this within the organization's network, regardless of actual distance and location. The parameters of the test stations to be monitored can be defined according to the needs and purpose. Even when creating your own tool, this function is not unique, i.e. on one test station parameters of operating system resources such as memory usage can be monitored, while on another test station logged-in users or running programs, reported system errors and others must be monitored. Data storage is one of the mandatory functions of this system. This process allows viewing data throughout history and more detailed analysis of events. There are numerous benefits that can be drawn and used from the data stored in the database. It is necessary to pay attention to the data stored as well as the scope and retention throughout history. The correct and secure setup of a database is one of the prerequisites for any serious system that processes data. Appropriate views should be created for users involved in the data monitoring process using all the elements mentioned so far. Creating a visually acceptable and easy-To-use interface that serves the main purpose is the final presentation of the entire system to users. A complete system leads to higher productivity, profitability and better organization of the company. It also allows project managers to better plan the use and occupancy of test stations. At any time, they have insight into the status of individual test stations, their activitie

关键词： Automotive industry

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The impact of different prosumer configurations on achieving savings due to the increase in electricity prices 4

The impact of different prosumer configurations on achieving...

引用

4th International Conference on Smart Grid Metrology, SMAGRIMET 2023

作者： Simic, Zvonimir Misljenovic, Nemanja Dubravac, Marina Topic, Danijel Josip Juraj Strossmayer University of Osijek Faculty of Electrical Engineering Computer Science and Information Technology Osijek Osijek Croatia

ISBN: (纸本)9798350323597

This paper investigates the consumption, and the cost of electricity for different configurations of prosumers in Croatia and additionally considers the current increase in electricity prices. In April 2022, electricity prices for households increased by 15%. Furthermore, from October 2022, electricity prices for households with annual electricity consumption above 5000 kWh are 50% higher than for households with annual electricity consumption below 5000 kWh. The load shifting from a period with a higher price to a period with a lower price can reduce electricity costs but cannot reduce the total amount of electricity imported from the distribution grid. Therefore, there is a possibility to install a PV power plant to meet consumers' own needs for electricity and to reduce the total amount of electricity imported from the distribution grid. Prosumers with different configurations regarding a PV power plant, battery energy storage, and optimal load shifting are simulated, and the total amount of electricity imported from the grid and total electricity costs are compared. According to simulation results, a prosumer with a PV power plant can reduce electricity consumption below 5000 kWh. On the other side, a prosumer with a PV power plant, battery energy storage, and optimal load shifting can significantly reduce total electricity costs. © 2023 IEEE.

关键词： Electric batteries

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Predicting the Specific Gravity of Must During Fermentation Using Machine Learning Models 32nd

Predicting the Specific Gravity of Must During Fermentation ...

引用

32nd International Conference on Organization and technology of Maintenance, OTO 2023

作者： Kovačević, Ivana Orić, Mihaela Tolić, Ivana Hartmann Nyarko, Emmanuel Karlo Faculty of Electrical Engineering Computer Science and Information Technology Osijek Croatia Kneza Trpimira 2B Osijek31000 Croatia

ISBN: (纸本)9783031514937

In this article, the process of fermentation in winemaking is investigated. The authors analyze fermentation data and propose several machine learning models to assess the effectiveness of ongoing fermentation processes based on measurements of specific gravity and temperature. To evaluate the performance of each model, various metrics such as R-squared, Mean Squared Error, Root Mean Squared Error, and Maximum Absolute Error are employed. The results suggest that the models have the potential to predict fermentation outcomes in winemaking and provide winemakers with a valuable tool to optimize the process and ensure high-quality wine production. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Machine learning

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