Marius Fetoiu

Publications

• Study Case of Direct Sensitivity Analysis Applied to Host Pathogen Cycles in Self-Regulated Forest Insect Systems

  Marius FETOIU, Valentin ISTRATIE, Gabriel VLADUT, Matei VINATORU, Ciprian COMSA

  Automation, Quality and Testing, Robotics, Cluj-Napoca Romania; 01/2010

  In this paper, we present a case study on the calculation of variation of state variables from the nominal trajectory to variations in initial conditions and parameters variation applied on host-pathogen cycles in self-regulated forest insect system. In this study we used for numerical calculation a... [more] In this paper, we present a case study on the calculation of variation of state variables from the nominal trajectory to variations in initial conditions and parameters variation applied on host-pathogen cycles in self-regulated forest insect system. In this study we used for numerical calculation and computer simulation, direct sensitivity analysis. Mathematical model considered is the model's G Anderson and May (1981). For this system we calculated sensitivity functions with respect to initial conditions in relation to the parameters. With sensitivity functions with respect to initial conditions in relation to system parameters can be done various scenarios. The advantage of this method is that enables us to determine the contribution of each state perturbations to the trajectory deviation.

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• The online prediction of the faults for integrated maintenance and reliability

  C. Popa, M. Fetoiu, G. Vladut, A. Craciun

  Automation, Quality and Testing, Robotics, 2008. AQTR 2008. IEEE International Conference on; 06/2008

  The objective of this paper is to realize analytic studies and applications in oriented engineering, especially in maintenance, reliability and security of the big technical installations, particularly for the nuclear domain. Software applications were developed to permit the online automatic comput... [more] The objective of this paper is to realize analytic studies and applications in oriented engineering, especially in maintenance, reliability and security of the big technical installations, particularly for the nuclear domain. Software applications were developed to permit the online automatic computation of the reliability, maintenance, availability and predictive maintenance parameters. This paper presents a task of an integrated application that accomplishes structural and dynamic analysis computation, geometric simulation, software for monitoring on-line predictive maintenance for the installation meant to tritium elimination, all based on scientific methods.

• Tele-control and quality of the electric energy in electrical stations

  G. Vladut, M. Dobriceanu, M. Fetoiu, C. Cojocaru, C. Popa, A. Craciun

  Automation, Quality and Testing, Robotics, 2008. AQTR 2008. IEEE International Conference on; 06/2008

  The extension of computational technique for the generalization of automatics, information and process monitoring involve the conception and materialization of complex data acquisition equipments, processing, memorizing and sending data taken from those processes at a higher level-dispatcher. In thi... [more] The extension of computational technique for the generalization of automatics, information and process monitoring involve the conception and materialization of complex data acquisition equipments, processing, memorizing and sending data taken from those processes at a higher level-dispatcher. In this way, it is presented data acquisition equipment for energetic measures including parameters for quality of the electric energy which is incorporated in a dispatching system aiming the monitoring and storing of electrical measures which are taken from electrical cells which compose the supervised electrical station. There are distinguished the component elements of the monitoring system: Local data acquisition equipments (LDAqE), local data acquisition equipments synchronization subsystem, data communication subsystem, processing, storing and data displaying subsystem and the software for data processing at the dispatcher level and also at the local data acquisition equipment level.

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