Now showing items 1874-1893 of 2981

    • 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 ...
    • On Dynamics of Bucket Wheel Excavators with Radial Digging 

      Debeleac, Carmen (Universitatea "Dunărea de Jos" din Galați, 2013-10-01)
      The paper presents the influence of some structural and operating parameters on external load characteristics caused by resistances to reclaiming at bucket wheel in the radial digging process.
    • On Estimation of the Orientation of Mobele Robots Ising Turning Fuctions and Sonar Information 

      Aiordăchioaie, Dorel ("Dunarea de Jos" University of Galati, 2003)
      SONAR systems are widely used by some artificial objects, e.g. robots, and by animals, e.g. bats, for navigation and pattern recognition. The objective of this paper is to present a solution on the estimation of the ...
    • 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 ...
    • On Image Transmission in Communication Channels Using Alamouti Space-Time Codes 

      Andrei, Mihaela; Nicolau, Viorel ("Dunarea de Jos" University of Galati, 2012)
      Transmitting large amounts of data through wireless communication channels, at high speed and low error probability, is a major challenge for the researchers in the field. In this paper, aspects of image transmission in ...
    • On Kerosene Lubrication of Hybrid Ball Bearings 

      Paleu, Viorel; Nelias, Daniel (Universitatea "Dunărea de Jos" din Galaţi, 2007)
      The hybrid ball bearings with silicon nitride balls are employed in special applications, e.g. high-speed machine tools and aeronautics. The kerosene can be used not only as a fuel for the jet engine, but also as lubricant ...
    • On Line Competitiveness Based on Adeptive Control of the Manufacturing System 

      Dașchievici, Luiza; Ghelase, Daniela (Universitatea "Dunărea de Jos" din Galați, 2010)
      Competitiveness fully and synthetically characterizes the viability of an enterprise. In the economics literature competitiveness is analyzed in particular in economic and managerial terms with almost no insight into the ...
    • On Phenomena Based Metamodelling - A Process System Engineering Point Of View 

      Aiordăchioaie, Dorel; Aoyama, Atsushi; Chatterjee, Ranajit; Naka, Yuji ("Dunarea de Jos" University of Galati, 2000)
      This work is looking to methodological aspects of process modelling. The point of view is more from Process System Engineering (PSE) in order to develop formal and generic techniques for process modelling, and to use ...
    • On Process Modelling Using Physical Oriented and Phenomena Based Principles 

      Aiordăchioaie, Dorel; Popa, Rusten; Culea, Mihai ("Dunarea de Jos" University of Galati, 2000)
      This work presents a modelling framework based on phenomena description of the process. The approach is taken to easy understand and construct process model in heterogeneous possible distributed modelling and simulation ...
    • On the Applicability of State-of-the-Art Fault Diagnosis Methodologies to Simple and Complex Systems 

      Bocănială, Cosmin Dănuţ; Costa, José Sá da; Bumbaru, Severin ("Dunarea de Jos" University of Galati, 2010)
      This paper performs an analysis on the applicability of state-of-the-art fault diagnosis methodologies to both simple and complex systems. Here, a complex system represents a system whose global behavior, which emerges ...
    • On the Constitutive Equation of a Low Carbon Steel 

      Canănău, Nicolae; Alexandru, Petrică; Ionel, Petrea; Gurău, Gheorghe (Universitatea "Dunărea de Jos" din Galaţi, 2008)
      The paper shows the results of the researches concerning the equation of deformation behavior of low carbon steel. The behavior law is established starting from the experimental torsion moment. The composed constitutive ...
    • On the Control of the Element Finite Meshes with Dimension in Arithmetic Progression 

      Dumitrache, Petru (Universitatea "Dunărea de Jos" din Galați, 2012)
      The purpose of this article is to present the formulae for calculating the parameters defining the finite element meshes with variable dimensions in arithmetical progression along some user defined paths within the ...
    • On the Correction Factor for Calibration of the Flowemeters with Axial Turbine 

      Axinti, Gavril; Axinti, Adrian-Sorin (Universitatea "Dunărea de Jos" din Galați, 2010)
      This paper refers to axial turbine flowmeters used for technical measurements of volumetric flows at hydraulic driving systems. This study demonstrates that volumetric flow through the transducer has proportional value ...
    • On the Corrosion Behavior of Organic Nanocomposite Coatings 

      Gheorghieș, Constantin; Gheorghieș, Livia; Oancea, Constantin; Hagioglu, Petrica (Universitatea "Dunarea de Jos" din Galați, 2009)
      Recently, researches on composite coatings of organic nature with the addition of metallic oxide nanopowders have shown an increasing corrosion resistance of metallic materials. Carbon steel shows an improved behavior ...
    • On the Corrosion Resistance of Cu-Mo Composite Materials Obtained by PVD Method 

      Grechanyuk, V.G.; Grechanyuk, N.I.; Orac, L.; Denisenko, V.A. (Universitatea "Dunărea de Jos" din Galați, 2008)
      The Cu – Mo composite materials have been obtained by electron flow vaporizing followed by vapor –phase condensing. Researches have shown that corrosion resistance in wet environment varies with the content of ...
    • On the Effect of Spectral Characteristics of Roughness on Contact Pressure Distribution 

      Crețu, Spiridon; Bălan, Mihaela Rodica; Urzică, Ana (Universitatea ”Dunărea de Jos” din Galați, 2009)
      In the first part of the paper, the matrix containing the roughness heights is obtained by a linear transformation of the Gaussian input matrix, the coefficients of the transformation matrix being found as solutions of a ...
    • On the Efficiency of Compacting Equipment 

      Debeleac, Carmen (Universitatea "Dunărea de Jos" din Galați, 2010)
      In this paper, the efficiency of vibratory rammer during compaction is examined. A three-degree-of-freedom model has been established for analytical representation of the soil-rammer interaction. In the first approach, it ...
    • On the harmonics reduction using wavelet based signal processing 

      Culea, Mihai; Aiordăchioaie, Dorel; Găiceanu, Marian ("Dunarea de Jos" University of Galati, 2000)
      This paper presents a method for calculating the reference currents needed for the command of an active filter. By using the Discrete Wavelet Transform (DWT) the high-frequency components of the currents are eliminated. ...
    • On the Influence of temperature the Cushioning Ability of the Hydraulic Cylinders 

      Hauk, Niculai (Universitatea "Dunărea de Jos" din Galați, 2015)
      This paper presents some aspects related to the way the cushioning capacity of hydraulic cylinder is affected by the temperature variations of the hydraulic fluid. We have analysed the case of the hydraulic cylinders with ...
    • On the Influence of the Working Tools Shape in the Mixing Proces 

      Debeleac, Carmen-Nicoleta; Năstac, Silviu-Marian (Universitatea "Dunărea de Jos" din Galați, 2011)
      Optimisation of the working tools used in industrial factory becomes a fast and effective method to be implemented easier in the production process. The article presents more design variants of a concrete mixer tools. The ...