Căutare Annals of the University "Dunarea de Jos" of Galati. Fascicle III: Electrotechnics, Electronics, Automation Control and Informatics după Titlu

Afișează articolele 90-109 of 230

    • Improving the Power Factor at Unbalanced Consumers 

      Bălănuţă, Ciprian; Munteanu, Toader; Fetecău, Grigore ("Dunarea de Jos" University of Galati, 2010)
      Unbalanced consumers have led to power quality problems. It is therefore necessary to have on hand solutions and equipment capable of improving the power quality. This paper provides a comparison on improving the power ...

    • Indirect Control of a Low Power Single-Phase Active Power Filter 

      Epure, Silviu; Rosu, Emil ("Dunarea de Jos" University of Galati, 2010)
      This paper deals with a low power, single phase active filter used to compensate nonlinear loads. The filter uses the indirect control method and it is based on a particular connection between filter, polluting load and ...

    • Indirect Control of a Single-Phase Active Power Filter 

      Roşu, Emil; Culea, Mihai; Dumitriu, Teodor; Munteanu, Traian ("Dunarea de Jos" University of Galati, 2006)
      The control of shunt active power filters using PWM inverters consists in generating a reference by separating, using different methods, the harmonics to be eliminated. The methods used are time-consuming and need dedicated ...

    • The Influence of Electric Transformers' Specific Parameters Modification on Power Distributions and on Technological Appropriate Consumption (TAC) Within the Energetic System 

      Voncilă, Ion; Iliuţă, Maria; Dumitrescu, Mariana; Gurguiatu, Gelu (The Annals of "Dunarea de Jos" University of Galati, 2005)
      The paper deals with a comparative analysis – using DINIS(E) programming environment – of the way electric transformers' specific variables (Iron losses, the parameters of the equivalent scheme, the level of primary power ...

    • Influence of High Performance Voltage Converters Supply Upon the Induction Motors Behaviour 

      Alexandru, Decebal; Enache, Monica-Adela; Marinas, Paul ("Dunarea de Jos" University of Galati, 2002)
      The induction motors supply by converters leads to a distorted regime accompanied by some parasite torques and some supplementary losses. These aspects are emphasized further on because their quantitative determinations ...

    • The Influence of Non-Homogenous Dielectric Material in the Waveguide Propagation Modes 

      Badea, Nicolae; Voncilă, Ion ("Dunarea de Jos" University of Galati, 2006)
      The aim of this paper is to indicate the equations of electromagnetic wave in homogenous and non-homogenous dielectric material, estabilising the bundary conditions and solves by FEM the equations of the electromagnetic ...

    • The Influence of the Ship's Steering Machine Over Yan and Roll Motions 

      Nicolau, Viorel ("Dunarea de Jos" University of Galati, 2003)
      The steering machine is a nonlinear system, with two important limitations: the maximum rudder angle and rudder rate. Therefore, the commands from yaw and rudder-roll control systems are modified and the expected effect ...

    • Integrated Solid Oxide Fuel Cell Power System Characteristics Prediction 

      Gâlceanu, Marian; Orsello, Glanmichele ("Dunarea de Jos" University of Galati, 2009)
      The main objective of this paper is to deduce the specific characteristics of the CHP 100kWe Solid Oxide Fuel Cell (SOFC) Power System from the steady state experimental data. From the experimental data, the authors have ...

    • Integrating Hypermedia Objects in an Tutoring System 

      Pecheanu, Emilia; Ştefănescu, Diana; Sabin Corneliu, Buraga; Istrate, Adrian ("Dunarea de Jos" University of Galati, 2001)
      The paper describes the internal architecture of an Intelligent Tutoring System, CSTutor. The architectural design of the tutorial system was developed in a collaborative work at the Department of Computer Science of the ...

    • Intelligent Software Agents for decizion Making in Enterprise 

      Novac-Ududec, Cornelia (Universitatea "Dunarea de Jos" of Galati, 2013)
      This paper will attempt to highlight the complexity of decision-making mechanisms as well as the interest of integrating the cognitive dimension into the simulation models, with a view to evaluate the impact of technological ...

    • Invariance Properties of Time-Varying Linear Systems 

      Păstrăvanu, Octavian; Matcovschi, Mihaela ("Dunarea de Jos" University of Galati, 2007)
      This paper formulates and proves two types of necessary and sufficient conditions for the characterization of positively (flow) invariant sets with respect to the state-space trajectories of the time-varying (non-autonomous) ...

    • IT&C Solutions for Intelligent Transportation Systems 

      Vasiliu, Grigore ("Dunarea de Jos" University of Galati, 2013)
      Road traffic congestion has incredibly high social costs, due to unnecessary fuel consumption, environment pollution, wasted time, and increased risk of accidents. As the road infrastructure obviously grows slower than the ...

    • Knowledge Based Diagnostic System With Probabilistic Approach 

      Cocu, Adina ("Dunarea de Jos" University of Galati, 2007)
      This paper presents a knowledge learning diagnostic approach implemented in an educational system. Probabilistic inference is used here to diagnose knowledge understanding level and to reason about probable cause of learner’s ...

    • Learning Bayesian Dependence Model for Student Modelling 

      Cocu, Adina ("Dunarea de Jos" University of Galati, 2008)
      Learning a Bayesian network from a numeric set of data is a challenging task because of dual nature of learning process: initial need to learn network structure, and then to find out the distribution probability tables. ...

    • Limitations of a Static VAr Compensator (SVC) with Switched Capacitor Operating as an Active Filter 

      Judele, Stelian; Solea, Răzvan; Dugan, Viorel ("Dunarea de Jos" University of Galati, 2001)
      The goal of this paper is to analyze the limitations of a static VAr compensator (SVC) with switched capacitor, when this operate as an active filter. The limitations considered and studied by simulation are in the zone ...

    • Linear Predictive Control of a Wastewater Treatment Process 

      Vlad, Ciprian; Sbarciog, Mihaela; Barbu, Marian ("Dunarea de Jos" University of Galati, 2011)

    • Low Power Battery Charger with Solar Panel Input, the Electronic Circuit 

      Epure, Silviu; Roşu, Emil ("Dunarea de jos" University of Galati, 2011)

    • Machine Learning Techniques for Image Recognition Applications 

      Ciubucciu, George; Șolea, Răzvan; Filipescu, Adrian (Universitatea "Dunărea de Jos" din Galați, 2017-06-30)
      Abstract: In the present paper is presented an algorithm to detect sleepiness of the driver. The purpose of this system is to locate, track and analyze face and eyes to prevent falling asleep, or the inattention of the ...

    • Mathematical Analysis of Uncertainty 

      Garrido, Angel ("Dunarea de Jos" University of Galati, 2008)
      Classical Logic showed early its insufficiencies for solving AI problems. The introduction of Fuzzy Logic aims at this problem. There have been research in the conventional Rough direction alone or in the Fuzzy direction ...

    • Mathematical Modeling and Simulation Photovoltaic Converter Operation When Varying Parameters 

      Constantin, Miholcă; Munteanu, Cristian; Nicolau, Viorel ("Dunarea de Jos" University of Galati, 2008)
      The paper presents a method of mathematical modelling of a solar converter using the results of full-scale testing. The advantages of analytical modelling method applied to photovoltaic systems are also presented; this ...