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2009 10th European control Conference, ECC 2009

作者： Alvarez, Teresa Salim, Anuar Maestre, J.M. Department of Engineering Science and Automatic Control School of Computer Engineering University of Valladolid Spain Department of Engineering Science and Automatic Control Faculty of Science University of Valladolid Spain Dept. de Ingeniería de Sistemas y Automática Escuela Superior de Ingenieros University of Seville Spain

ISBN: (纸本)9783952417393

This paper shows how control techniques, such as PID or generalized predictive control, can improve the performance of TCP/IP networks when dealing with congestion. Drop tail, or more sophisticated AQM techniques such as RED, perform worse than process control techniques. A comparison between the different methods in different working scenarios is analyzed. Two different GPC controllers are evaluated. One considers the model resulting from on-line identification and the other is the linearization of the non-linear model. © 2009 EUCA.

关键词： Transmission control protocol

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Web Data Management Platform Integrating Encryption Algorithms 13

Web Data Management Platform Integrating Encryption Algorith...

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13th International Conference on Electronics, computers and Artificial Intelligence, ECAI 2021

作者： Dinca, Alexandru Angelescu, Nicoleta Popescu, Dan University POLITEHNICA of Bucharest Faculty of Automatic Control and Computer Science Bucharest Romania Valahia University of Targoviste Faculty of Electrical Engineering Electronics and Information Technology Targoviste Romania

ISBN: (纸本)9781665425346

The development area of web technologies has gained great popularity due to the power with which these new technologies can manage resources and due to developers or experts of various types who can build applications and scale them according to the needs of different application areas or companies which use these types of applications. In this paper we present a modern web platform for data management that includes current web technologies and security standards that ensure the integrity of data in the information flow of the application. © 2021 IEEE.

关键词： Information management

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Identification of Noisy Distributed Parameter Systems Using Optimal Stochastic Approximation Procedure

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IFAC Proceedings Volumes 1982年第4期15卷 1271-1276页

作者： S.A.F. Bassiouny Β.M. Abuelnasr M.N. El-Derini Department of Computer Science and Automatic Control Faculty of Engineering University of Alexandria Egypt

The optimal stochastic approximation procedure (OSAP) is applied to the parameter identification problem of distributed parameter system (DPS) driven by random disturbances and observed through noisy measurements. This procedure is a stochastic approximation procedure (SAP) with an optimal gain sequence and an optimal transformation on the gradient of the objective function: these optimal values accelerate the convergence rate by minimizing the mean squared parameter estimation error, under the assumption that the density functions of the system and observation noises are known, or can be easily estimated. An example of parameter identification of a stochastic parabolic DPS is simulated on the digital computer. A comparison is made among the results of the optimal, the modified, the nominal first-order, and the nominal second-order SAP. It is shown that the OSAP gives higher accuracy and faster rate of convergence as compared to the nominal SAP

关键词： Identification distributed parameter systems optimal stochastic approximation modified stochastic approximation nominal stochastic approximation

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The analysis of the disturbances in the measurements of the acoustic partial discharges

The analysis of the disturbances in the measurements of the ...

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41st International Congress and Exposition on Noise control engineering 2012, INTER-NOISE 2012

作者： Boczar, Tomasz Cichoń, Andrzej Borucki, Sebastian Zmarzly, Dariusz Automatic Control and Computer Science Institute of Electric Power Engineering Opole University of Technology ul. Proszkowska 76 45-758 Opole Poland

ISBN: (纸本)9781627485609

The subject matter of the paper refers to the improvement of the acoustic emission (AE) method used in diagnostics of insulation systems of electric power devices. During measurements of the AE pulses that are generated by partial discharges (PDs) in the insulation of electric power devices, there appear diverse kinds of interfering signals. These disturbances, occurring during measurements in laboratory as well as under industrial conditions, can be generated by sources placed inside the electric power device under study or/and by sources emitting in its surrounding. The sources mentioned can be physical phenomena of mechanical, electric or acoustic nature. If the disturbances appear at the same time during measurements as the AE pulses generated by PDs this can cause deformation of the gathered time-runs. This can have direct influence on the proper interpretation of the measurement results obtained by use of the AE method. Hence, the necessity of the influence estimation of the interfering signals on the by PDs generated AE pulses time-runs. The performed research works consider the following issues: The measurements and analysis of the acoustic disturbances generated by corona discharges in the overhead electric power transmission line.

关键词： Partial discharges

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The possibilities of using acoustic signals generated by the on load tap changer

The possibilities of using acoustic signals generated by the...

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41st International Congress and Exposition on Noise control engineering 2012, INTER-NOISE 2012

作者： Cichoń, Andrzej Borucki, Sebastian Boczar, Tomasz Zmarzly, Dariusz Automatic Control and Computer Science Institute of Electric Power Engineering Opole University of Technology ul. Proszkowska 76 45-758 Opole Poland

ISBN: (纸本)9781627485609

An important part of electric power transformer is the on load tap changer (OLTC) which enables for voltage regulation in the network. Due to high level of failure frequency of these devices it is necessarily to look for new diagnostic methods which enable for theirs technical state estimation under transformer normal operating condition. Presently at the electric Power Institute at Opole University of Technology there are works in progress aspiring to determine the application possibility of the AE method for OLTC diagnosis. Results of scientifically-research works aiming to characterize the acoustic emission (AE) signals generated by OLTC constructed from a separated selector and a power switch are presented in the paper. AE signals generated during the whole OLTC joining cycle are presented. Within the signal four characteristic acoustic structures have been enhanced which regard to succeeding stages of the joining process. AE signals generated by the selector and by the power switch have been analyzed in detail. Analysis of the timefrequency components of signals generated by OLTC has been carried out with the short time Fourier transform (STFT) and continuous wavelet transform (CWT).

关键词： Voltage regulators

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Efficient Detection of Invasive Stink Bugs Using Convolutional Neural Networks 31

Efficient Detection of Invasive Stink Bugs Using Convolution...

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31st Telecommunications Forum, TELFOR 2023

作者： Dinca, Alexandru Angelescu, Nicoleta Ichim, Loretta Serghei, Trandafir-Liviu Popescu, Dan National University of Science and Technology Politehnica Bucharest Faculty of Automatic Control and Computer Science Bucharest Romania Valahia University of Targoviste Faculty of Electrical Engineering Electronics and Information Technology Targoviste Romania

ISBN: (纸本)9798350303131

Timely pest detection and identification is critical as part of modern agriculture. Halyomorpha Halys is a prevalent pest with proven harmful impacts on numerous crops and agricultural regions. The paper proposes an efficient model to improve the detection of two invasive stink bugs: Halyomorpha halys and Nezara Viridula. automatic detection of these two bugs is essential in various fields, such as precision agriculture and integrated pest management. The high performances obtained in the present study open new perspectives for the further development of insect pest detection systems and can serve as a basis for future modifications and improvements of these models. © 2023 IEEE.

关键词： Convolutional neural networks

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Industrial Teleassistance with the Help of Augmented Reality 23

Industrial Teleassistance with the Help of Augmented Reality

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23rd RoEduNet Conference: Networking in Education and Research, RoEduNet 2024

作者： Bobeica, Valentin Popescu, Dan Angelescu, Nicoleta Ichim, Loretta National University of Science and Technology Politehnica Bucharest Faculty of Automatic Control and Computer Science Bucharest Romania Valahia University of Targoviste Faculty of Electrical Engineering Electronics and Information Technology Targoviste Romania

ISBN: (纸本)9798331540388

This paper details the integration of augmented reality (AR) in a new factory, focusing on enhancing maintenance efficiency and optimization. The innovative approach involves combining AR technology, an Android application, and Siemens PLCs (Programmable Logic controller), for efficient automation. The robustness of the PLC enables seamless integration within manufacturing environments, accommodating diverse programming paradigms. The software aspect features Human Machine Interface (HMI) configuration using Siemens' WinCC software, offering dynamic visualizations, alarm handling, and data logging. WinCC's scalability suits applications of varying sizes. The HMI architecture is designed for easy parameter display. The Android application, developed with Java and Python, leverages their respective strengths in Android app development and image processing. Data exchange is facilitated by OPC-UA, supporting multiple programming languages for seamless communication. The AR Teleassistance is highlighted as a revolutionary solution, fostering real-Time communication among global experts, technicians, and operators. Beyond gaming origins, AR teleassistance enhances efficiency in various sectors, minimizing downtime and facilitating global knowledge transfer. The integration of Teleassistance promotes effective collaboration between human expertise and automated systems, crucial for optimal performance in modern industrial settings. Continuous development is suggested through the addition of more 3D mechanical drawings and real-Time stock information for parts in the application, aiming for future optimization and performance enhancement. © 2024 IEEE.

关键词： augmented reality data exchange global knowledge image processing manufacturing environment production processes smart industrial

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Global optimization in complex circuits design

Global optimization in complex circuits design

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ISSCS 2005: International Symposium on Signals, Circuits and Systems

作者： Pruteanu, Codrin Galea, Dan Haba, Cristian-Gyözö Faculty of Automatic Control and Computer Science Gh. Asachi Technical University Iasi Romania Faculty of Electrical Engineering Gh. Asachi Technical University Iasi Romania

ISBN: (纸本)0780390296

Today's circuit design process is become a complex task. Sequential logic synthesis is an important part of the circuit design flow. The logic synthesis phase is a bottleneck during the overall design process since heuristic techniques which take a considerable amount of time are often used during this phase. A good solution is realized in a constrained design space by using global optimization techniques. The purpose of this paper is to develop a robust optimization algorithm that searches the solution space as efficiently as possible in order to find a global optimization of the internal states of a specified circuit, as a global solution to a high level synthesis problem. © 2005 IEEE.

关键词： Global optimization

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Earliest computer vision systems in Poland

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Advances in Intelligent and Soft Computing 2010年 84卷 3-13页

作者： Tadeusiewicz, Ryszard Faculty of Electrical Engineering Automatic Control Computer Science and Electronics Department of Automatic Control AGH University of Science and Technology Poland

ISBN: (纸本)9783642162947

In the paper is presented the brief history of research conducted in Poland (at AGH University) in the area of image processing, analysis and recognition. The history is connected with changes of the technology used for problem solving. First systems are build from the separate integrated circuits of low and medium scale of integration, after this we develop some systems build on the base of VLSI elements, and now the new systems are constructed on the base of FPGA technology. Nevertheless all the time scientific group from AGH was conducted research in technological applications of vision systems. At 70th and 80th years of XX century it was pioneer works devoted to building of second in Poland and one of the first in Europe systems for computer processing of the images, now research is dedicated mainly toward real time image processing systems. © 2010 Springer-Verlag Berlin Heidelberg.

关键词： Problem solving

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Influence of agglomerations on magnetic properties of polymer matrices filled with magnetic nanoparticles

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Materials Today: Proceedings 2022年 67卷 792-796页

作者： Blachowicz, Tomasz Grzybowski, Jacek Ehrmann, Andrea Institute of Physics – Centre for Science and Education Silesian University of Technology Gliwice 44-100 Poland Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology Gliwice 44-100 Poland Faculty of Engineering and Mathematics Bielefeld University of Applied Sciences Bielefeld 33619 Germany

Magnetic nanoparticles can be embedded in electrospun nanofibers and other polymeric matrices to prepare magnetic composites with defined magnetic and mechanical properties. Metal-oxide nanoparticles, such as magnetite or nickel-ferrite, are of special interest since they do not need a coating to avoid oxidation. Like other nanoparticles, these metal-oxide nanoparticles tend to form agglomerations, in this way modifying the magnetic properties of the composites. After studying this effect for the magnetic elements Co, Fe, Ni as well as permalloy (Py) in a previous study, defining a new method to quantify the nanoparticle distribution in a polymer, here we concentrate on the influence of agglomerations on the magnetic properties of metal-oxide nanoparticles with different diameters in non-magnetic matrices. © 2022

关键词： Magnetite

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