• Stability criteria for cellular neural networks 

      Danciu, Daniela; Răsvan, Vladimir ("Dunarea de Jos" University of Galati, 2001)
      A cellular neural network is an artificial neural network which features a multidimensional array of neurons and local interconnections among the cells. Neural networks are systems with several equilibrium states. It is ...
    • On Exponential and Asymptotic Estimation of State Variables in Bioprocesses 

      Selişteanu, Dan; Ionete, Cosmin; Petre, Emil ("Dunarea de Jos" University of Galati, 2001)
      The paper presents on-line estimation strategies for bioprocesses, which are characterized by strongly nonlinear dynamics. A general form for the state observers is analysed and the exponential observability of bioprocesses ...
    • Supervisory Control Technique for an Assembly Workstation as a Dynamic Discrete Event System 

      Cernega, Daniela Cristina; Mînzu, Viorel ("Dunarea de Jos" University of Galati, 2001)
      This paper proposes a control problem statement in the framework of supervisory control technique for the assembly workstations. A desired behaviour of an assembly workstation is analysed. The behaviour of such a workstation ...
    • On Activity Modelling in Process Modelling 

      Aiordăchioaie, Dorel ("Dunarea de Jos" University of Galati, 2001)
      The paper is looking to the dynamic feature of the meta-models of the process modelling process, the time. Some principles are considered and discussed as main dimensions of any modelling activity: the compatibility of ...
    • Robust Control Methods for a Recycle Bioreactor 

      Ionete, Cosmin; Petre, Emil; Selişteanu, Dan ("Dunarea de Jos" University of Galati, 2001)
      The paper presents a robust control design strategy for bioprocesses, which are characterized by strongly nonlinear dynamics. More precisely, we present the H2 methodology in order to compute the controller for a recycle ...
    • 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 ...
    • Comments on Clock Models in Hybrid Automata and Hybrid Control Systems 

      Oltean, Virginia Ecaterina; Cârstoiu, Dorian ("Dunarea de Jos" University of Galati, 2001)
      Hybrid systems have received a lot of attention in the past decade and a number of different models have been proposed in order to establish mathematical framework that is able to handle both continuous and discrete ...
    • Analysis of a Neuro-Fuzzy Approach of Air Pollution: Building a Case Study 

      Neagu, Ciprian-Daniel; Neagu, Daniela; Georgescu, Lucian; Palade, Vasile ('Dunarea de Jos" University of Galati, 2001)
      This work illustrates the necessity of an Artificial Intelligence (AI)-based approach of air quality in urban and industrial areas. Some related results of Artificial Neural Networks (ANNs) and Fuzzy Logic (FL) for ...
    • 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 ...
    • Software System for Generating, Identification and Simulation of the Biotechnological Processes Models 

      Caraman, Sergiu; Frangu, Laurenţiu; Turtoi, Maria ("Dunarea de Jos" University of Galati, 2001)
      The paper deals with the development of a software system (BIOCALC) for the modelling, identification and simulation of the biotechnological processes. BIOCALC is based on the algorithm developed by George Bastin and ...
    • Modeling of the Biodegradation in Multiphase Stirred Tank Reactor 

      Turtoi, Maria; Hopulele, Traian; Caraman, Sergiu ("Dunarea de Jos" University of Galati, 2001)
      The surface response methodology is used to verify predicted models and to adapt them on particular conditions of growth. The effect of solvent addition during the linear cell growth on the enhancement of biodegradation ...
    • Modelling Non-Stationary Wind Speed for Renewablwe Energy Systems Control 

      Nichita, Cristian; Luca, Daniel; Dakyo, B.; Ceangă, Emil; Cutululis, Nicolaos Antonio ("Dunarea de Jos" University of Galati, 2001)
      This paper deals with the modelling of the wind speed, treated as a nonstationary process. In the proposed modelling methods, the wind speed has two components: a long and medium term-component, described by an available ...
    • Energetic Macroscopic Representation Applied to an Electrical Urban Transport System 

      Popa, Ioan Şerban; Popescu, Mihai Octavian; Popescu, Claudia ("Dunarea de Jos" University of Galati, 2002)
      An energetic description of the electric transport urban system ASTRAIK 415T is proposed according to a specific formalism. This is used to simulate the trolleybus system, equipped with a chopper and a direct current ...
    • Considerations on the Effect of Plastic Deformation Over the Magnetic Behavior of Soft Ferromagnetic alloy FE-3%SI NO 

      Fetecău, Grigore; Iordache, Viorel-Eugen; Hug, Eric (2002)
      The paper synthetically presents the results obtained over the degradation of magnetic properties of soft ferromagnetic sheets Fe-3%Si NO required mechanically in plastic deformation area. Chronologically, the evolution ...
    • 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 ...
    • Simple Approach for Induction Motor Control Using Reconfigurable Hardware 

      Imecs, Maria; Incze I., Ioan; Szabó, Csaba ("Dunarea de Jos" University of Galati, 2002)
      The paper deals with rotor-field-oriented vector control structures for the induction motor drives fed by the so-called tandem frequency converter. It is composed of two different types of DC-link converters connected ...
    • Detecting the Liquid core in Continuous Casting Slabs by Load Torque Estimation in Unbending Zone 

      Bivol, Ion; Roşu, Emil; Ceangă, Emil ("Dunarea de Jos" University of Galati, 2002)
      The development in continuous casting process has been strongly dominated by the demands of quality improvement and reduced costs for steel products in recent years. To achieve these goals consideration has been given ...
    • Modeling, Identification and simulation of a Lighting Control System 

      De Keyser, Robin; Ionescu, Clara Mihaela ("Dunarea de Jos" University of Galati, 2002)
      This paper presents the results of the first phase in the design of a control system for closed-loop regulation of the light amount in office-building rooms. This project is a joint development of Ghent University and ...
    • Imperfect Data in Database Context. How are they Stored in Extended Relational Databases? 

      Tudorie, Cornelia ("Dunarea de Jos" University of Galati, 2002)
      Building a more accurate reality model requires taking into account imperfect information present in our knowledge and language. This paper presents several aspects of data imperfection in the database context and the ...
    • A Diferent Approach in the Parameters' Identification of a Jfet Using Genetic Algorithms 

      Belea, Radu; Beldiman, Liviu ("Dunarea de Jos" University of Galati, 2002)
      The genetic algorithms are developing in three directions: the genetic algorithms theory, the genetic algorithms programming and the study of the problems that can be solved with genetic algorithms. In this paper it is ...