Bulletin of the Polytechnic Institute of Iași. Electrical Engineering, Power Engineering, Electronics Section最新文献

{"title":"Automatic Real-Estate Image Analysis for Retrieval and Classification","authors":"C. Florea, Andrei Racoviteanu, L. Florea, B. Florea","doi":"10.2478/bipie-2022-0009","DOIUrl":"https://doi.org/10.2478/bipie-2022-0009","url":null,"abstract":"Abstract Nowadays, the real estate sector is also benefiting from the advance of the technology. Digital images accompany announcements advertising for renting or selling a property. Computer vision and image analysis contribute to the understanding of these images towards better consumer experience. In this paper we show how retrieval and description can be used efficiently to isolate cvasi-duplicate images and identify similar examples to the ones that have drawn viewer’s interest. Three problems related to real-estate imaging are identified and solutions are proposed and evaluated on large databases.","PeriodicalId":330949,"journal":{"name":"Bulletin of the Polytechnic Institute of Iași. Electrical Engineering, Power Engineering, Electronics Section","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129566454","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":"Synchronizing Analog - Discrete Nonlinear Systems","authors":"Carmen Grigoras, Victor Grigoras","doi":"10.2478/bipie-2022-0010","DOIUrl":"https://doi.org/10.2478/bipie-2022-0010","url":null,"abstract":"Abstract Using nonlinear chaotic systems for secure communication is an application field presented in recent published research. This paper aims at improving the security of signal transmission using chaotic encryption. The proposed approach uses a combined analogue and discrete-time structure, for both chaotic emitter and synchronizing receiver. The prototype system used is similar to the Lorenz nonlinear oscillator. Our study presents the emitter dynamic properties, develops the receiver synchronization using the emitter partitioning method, and designs a linear equalizer at the receiving end of the communication chain in order to improve the demodulated signal.","PeriodicalId":330949,"journal":{"name":"Bulletin of the Polytechnic Institute of Iași. Electrical Engineering, Power Engineering, Electronics Section","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115211024","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":"Discrimination of Focal and Non-Focal Epileptic Eeg Signals Using Different Types of Classifiers","authors":"Mădălina-Giorgiana Murariu, D. Tarniceriu","doi":"10.2478/bipie-2022-0011","DOIUrl":"https://doi.org/10.2478/bipie-2022-0011","url":null,"abstract":"Abstract Epilepsy is a neurological disorder characterized by recurrent seizures and has a high incidence rate. The aim of this research is to classify EEG signals as either focal and non-focal in order to identify the epileptogenic area of the brain, which can be surgically treated to manage epilepsy. In this paper, was proposed a classification method based on higher order spectra (HOS) parameters and four different classifiers: linear discriminant analysis (LDA), quadratic discriminant analysis (QDA), k-Nearest neighbors (KNN), and Mahalanobis distance (MD). The method was evaluated using a public dataset that consists in EEG recordings from epileptic patients. The classifiers performances were evaluated and it was shown that KNN classifier achieves a maximum classification rate of 99.55%, sensitivity of 100%, and specificity of 99.09%. The data classification was performed with maximum values of 0.96 for F1-score, and 0.91 for both Kappa and Matthews Coefficient. The results demonstrate the efficiency of the proposed method to identify the type of EEG signals.","PeriodicalId":330949,"journal":{"name":"Bulletin of the Polytechnic Institute of Iași. Electrical Engineering, Power Engineering, Electronics Section","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115800368","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":"A Comparative Energy and Exergy Analysis Between Organic Rankine Cycle and Kalina Cycle System 11 for the Waste Heat Recovery of a PEM Fuel Cell Power Station","authors":"V. Rezaee, A. Houshmand","doi":"10.2478/bipie-2022-0008","DOIUrl":"https://doi.org/10.2478/bipie-2022-0008","url":null,"abstract":"Abstract In this study, the performance analysis of waste heat recovery systems in a power generation system consisting of 13000 Proton Exchange Membrane Fuel Cells (PEMFC) in a stack has been investigated. Organic Rankine Cycle (ORC) and Kalina Cycle System 11 (KCS11) as bottoming cycles to convert generated waste heat of stack into electricity were compared with each other in a defined hybrid system. The improvement of system with an exact energy and exergy analysis after utilizing the waste heat in the hybrid system has been analyzed. Results show that the energy efficiency of combined system using Organic Rankine Cycle and Kalina Cycle System 11 increase by about 5% and 1.75% respectively. In addition, exergy analysis results indicate that exergy efficiency of combined system using Organic Rankine Cycle and Kalina Cycle System 11 increases by about 4% and 1.5% respectively. The total exergy destruction rate obtained for the hybrid power systems is 235.5 kW when ORC is used and 329.7 kW when KCS11 is used respectively. Results show that in presented systems ORC has higher energy and exergy efficiencies than KCS11 but different used working fluids and equipment of systems must also be considered from an economical point of view.","PeriodicalId":330949,"journal":{"name":"Bulletin of the Polytechnic Institute of Iași. Electrical Engineering, Power Engineering, Electronics Section","volume":"142 38","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131722353","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":"A Led Matrix Manager Sniffer","authors":"M. Sălcianu, A. Hariton, C. Zet","doi":"10.2478/bipie-2022-0007","DOIUrl":"https://doi.org/10.2478/bipie-2022-0007","url":null,"abstract":"Abstract This paper is focused on presenting the simulated solution for synchronizing the CAN communication, which is signal based, with the Pulse Width Modulation (PWM) for each LED connected to a LED matrix manager device. Using the presented solution, the user is able to read and verify each LEDand represents a very easy and fast testing approach for automotive lighting with LMM (LED Matrix Manager) devices. The information provided by the sniffer improves the error root cause detection time, offers an overview on the requirements compliance, and assures an efficient monitorisation of the LMM behaviour. The LMM sniffer is developed due to the missing of a dedicated standard solution for this purpose.","PeriodicalId":330949,"journal":{"name":"Bulletin of the Polytechnic Institute of Iași. Electrical Engineering, Power Engineering, Electronics Section","volume":"212 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120895721","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":"A Short Survey of the Development and Applications of Spiking Neural Networks of High Biological Plausibility","authors":"George-Iulian Uleru, M. Hulea, V. Manta","doi":"10.2478/bipie-2022-0012","DOIUrl":"https://doi.org/10.2478/bipie-2022-0012","url":null,"abstract":"Abstract Spiking neural networks (SNNs) are inspired from natural computing, modelling with high accuracy the interactions and processes between the synapses of the neurons focusing on low response time and energy efficiency. This novel paradigm of event-based processing opens new opportunities for discovering applications and developing efficient learning methods that should highlight the advantages of SNNs such as the large memory capacity and the fast adaptation, while preserving the easy-to-use and portability of the conventional computing architectures. In this paper, we do a brief review of the developments of the past decades in the field of SNNs. We start with a brief history of the SNN and summarize the most common models of spiking neurons and methods to implement synaptic plasticity. We also classify the SNNs according to the implemented learning rules and network topology. We present the computational advantages, liabilities, and applications suitable for using SNNs in terms of energy efficiency and response time. In addition, we briefly sweep through the existing platforms and simulation frameworks for SNNs exploration. The paper ends with conclusions that show predictions of future challenges and the emerging research topics associated with SNNs.","PeriodicalId":330949,"journal":{"name":"Bulletin of the Polytechnic Institute of Iași. Electrical Engineering, Power Engineering, Electronics Section","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114623412","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":"Towards Reliability and Safety Improvement of Measurement and Control Processes on Ships: Implementation of Wireless Hart Protocol","authors":"Mostafa Salaheldin Abdelsalam Abotaleb, J. Mindykowski, B. Dudojc, R. Maśnicki","doi":"10.2478/bipie-2022-0002","DOIUrl":"https://doi.org/10.2478/bipie-2022-0002","url":null,"abstract":"Abstract Measurement and control systems in maritime engineering applications are quite similar to those in shore based engineering applications except for some unique features which differentiate between each of them. These features are either related to the specific nature and purpose of the maritime application (Various types of commercial ships, oil/gas rigs and others) or linked to the harsh environmental conditions such as salinity, corrosion and vibration which usually exist in higher levels than shore based applications. Accordingly and due to such a specific nature of maritime engineering applications, more requirements should be considered to ensure reliability and stability for measurement and control process avoiding any negative effects that might be associated with such a unique engineering environment. As was discussed in (Abotaleb, 2021), smart transmitters based on hybrid analogue-digital (HART) and digital (Foundation Fieldbus and Profibus PA) communication protocols with additional diagnostic information, they might be a possible wired alternative for analogue transmitters (mostly based on 4-20 mA analogue standard). Similarly, wireless HART protocol can be an alternative for 4-20 mA analogue transmitters. This article will discuss the possibility of replacing classical 4-20 mA analogue transmitters with wireless HART smart transmitters on commercial ships as an example for maritime engineering application. The first section of the discussion will include a theoretical background for the basic principles of wireless HART protocol among other wireless technologies used in industrial automation. The second section of the article will discuss the possibility of utilising wireless HART protocol in the most common measurement and control systems on any commercial ship in order to discover the degree to which wireless HART can be fully or partially integrated with maritime engineering applications. Afterwards, better realization for such a concept will be rendered by an analytical planning case study conducted for tank level measurement system on different types of commercial ships. Based on both the theoretical and the analytical sections, the experimental section will manifest the importance of some of the necessary key elements to implement a reliable wireless HART network. These key elements are RSSI levels, supply voltage stability and the capability of wireless HART adapters to integrate between wired HART protocol and wireless HART network.","PeriodicalId":330949,"journal":{"name":"Bulletin of the Polytechnic Institute of Iași. Electrical Engineering, Power Engineering, Electronics Section","volume":"83 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131377245","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":"Analogous Mode Implementation of State Space Based Control of Buck Converter","authors":"Diana-Elena Cucoș, D. Neacşu","doi":"10.2478/bipie-2022-0006","DOIUrl":"https://doi.org/10.2478/bipie-2022-0006","url":null,"abstract":"Abstract The new requirements for point-of-load converters include the dynamic behavior, leading to the need for improvements in the control system for the conventional buck converter. Usually, the regulator design, in order to secure stability at parameter or mode variation, aims a zero steady-state error and a phase margin over 60 degrees. The design based on Venable’s K-factor method (Venable, 1983) helps achieve this topic. A more modern control design method based on State Space is used progressively on digital platforms. This paper extends the merits of the State Space based design procedure with an analogous mode implementation.","PeriodicalId":330949,"journal":{"name":"Bulletin of the Polytechnic Institute of Iași. Electrical Engineering, Power Engineering, Electronics Section","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131545995","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":"DBD System Operating in Ambient Air for Surface Treatment of Polyethylene Terephthalate Films","authors":"Ciprian-Cătălin Rusu, D. Cretu, R. Burlica, D. Astanei, O. Beniuga","doi":"10.2478/bipie-2022-0004","DOIUrl":"https://doi.org/10.2478/bipie-2022-0004","url":null,"abstract":"Abstract Polymers are materials widely used in many important technologies and applications because of their optical, physical, mechanical, thermal and chemical properties. Polyethylene terephthalate (PET) foil is often used as an insulating material in printed electronics, flexible circuitry, displays, industrial applications, graphic films, or for clinical and healthcare applications. A big inconvenience of PET film is the low surface tension which also implies a low wettability, resulting in poor coating adhesion and poor printing properties. In order to eliminate this disadvantage, a surface treatment was used by means of a dielectric barrier discharge (DBD) operating in ambient air at atmospheric pressure which consisted of a high voltage AC source and two circular metal electrodes 60 mm in diameter. The paper aims are to treat two different PET film substrates designed in this work as PET 1, without thermal treatment, and PET 2 which is heat stabilized. The effect of plasma exposure was assessed by determining the water contact angle by means of an Ossila goniometer and by measuring the surface tension with a special ink. The considered foils were exposed to different DBD treatment times (0.2, 0.5, 1, 5, 10, 30 s) and the evolution of the water contact angle overtime after treatment up to 96 hours was monitored. It was found that the water contact angle of the untreated PET 1 and PET 2 was 74° and 73.5°, respectively, and after 30 s DBD treatment time it decreased to 30.9° and 30°, respectively.","PeriodicalId":330949,"journal":{"name":"Bulletin of the Polytechnic Institute of Iași. Electrical Engineering, Power Engineering, Electronics Section","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124923574","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":"Video Distance Measurement Method Based on Three Focus Positions","authors":"Elena Serea, Mihai Penciuc, M. Temneanu, C. Donciu","doi":"10.2478/bipie-2022-0001","DOIUrl":"https://doi.org/10.2478/bipie-2022-0001","url":null,"abstract":"Abstract Several precision technologies require video measuring systems that perform fast an extensive number of routine measurements and deliver high accuracy outcome. The quality of achievement is intrinsically determined by the measurement technique where with the applications that operate these systems are designed. The paper advances a simplified and at the same time comprehensive approach, proposing a new video distance measuring method using a single camera. It is designed to assess the distance at which the visual task is from the camera, using three adjacent focus positions. Practically, the method involves two stages: calibration and measurement. Calibration is realized only once for each camera type and involves setting the measuring range for all positions of the focus lens where maximum clarity is obtained. Distance measurement involves the use of the maximum sharpness position of the lens and the correlation with the sharpness values of the positions next to the maximum sharpness position.","PeriodicalId":330949,"journal":{"name":"Bulletin of the Polytechnic Institute of Iași. Electrical Engineering, Power Engineering, Electronics Section","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134578787","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}