Listar Publicaciones Científicas Nanociencias y Materiales por autor "Ibarra Junquera, Vrani"

Mostrando ítems 1-11 de 11

    • A robust estimation of the exponent function in the Gompertz law 

      Ibarra Junquera, Vrani; Monsiváis Alonso, María del Pilar; Rosu Barbus, Haret-Codratian; López Sandoval, Román (Elsevier, 2006)
      "The estimation of the solution of a system of two differential equations introduced by Norton et al. (1976) that is equivalent to the famous Gompertz growth law is performed by means of the recent adaptive scheme of ...

    • Application of multifractal wavelet analysis to spontaneous fermentation processes 

      Ibarra Junquera, Vrani; Escalante Minakata, María del Pilar; Rosu Barbus, Haret-Codratian (Elsevier, 2008)
      "An algorithm is presented here to get more detailed information, of mixed cul-ture type, based exclusively on the biomass concentration data for fermentation processes. The analysis is performed with only the on-line ...

    • Cellular automata modeling of continuous stirred tank reactors 

      Pérez Terrazas, Jaime Enrique; Ibarra Junquera, Vrani; Rosu Barbus, Haret-Codratian (2008)
      "The classical dynamical systems model of continuous stirred tank reactors (CSTR) in which a first order chemical reaction takes place is reformulated in terms of stochastic cellular automata by extending previous works of ...

    • Detection of mixed-culture growth in the total biomass data by wavelet transforms 

      Rosu Barbus, Haret-Codratian; Ibarra Junquera, Vrani (2010)
      "We have shown elsewhere that the presence of mixed-culture growth of microbial species in fermentation processes can be detected with high accuracy by employing the wavelet transform. This is achieved because the crosses ...

    • FRW barotropic zero modes: dynamical systems observability 

      Rosu Barbus, Haret-Codratian; Ibarra Junquera, Vrani (2007)
      "The dynamical systems observability properties of barotropic bosonic and fermionic FRW cosmological oscillators are investigated. Nonlinear techniques for dynamical analysis have been recently developed in many engineering ...

    • High-gain nonlinear observer for simple genetic regulation process 

      Torres González, Luis Adolfo; Ibarra Junquera, Vrani; Escalante Minakata, María del Pilar; Rosu Barbus, Haret-Codratian (Elsevier, 2007)
      "High-gain nonlinear observers occur in the nonlinear automatic control theory and are in standard usage in chemical engineering processes. We apply such a type of analysis in the context of a very simple one-gene reg-ulation ...

    • Inferring mixed-culture growth from total biomass data in a wavelet approach 

      Ibarra Junquera, Vrani; Escalante Minakata, María del Pilar; Rosu Barbus, Haret-Codratian (Elsevier, 2006)
      "It is shown that the presence of mixed-culture growth in batch fermentation processes can be very accurately inferred from total biomass data by means of the wavelet analysis for singularity detection. This is accomplished ...

    • Nonlinear software sensor for monitoring genetic regulation processes with noise and modeling errors 

      Ibarra Junquera, Vrani; Torres González, Luis Adolfo; Rosu Barbus, Haret-Codratian; Argüello Astorga, Gerardo Rafael (2005)
      "Nonlinear control techniques by means of a software sensor that are commonly used in chemical engineering could be also applied to genetic regulation processes. We provide here a realistic formulation of this procedure ...

    • Online monitoring of Mezcal fermentation based on redox potential measurements 

      Escalante Minakata, María del Pilar; Ibarra Junquera, Vrani; Rosu Barbus, Haret-Codratian; De León Rodríguez, Antonio; González García, Raúl (2009)
      "We describe an algorithm for the continuous monitoring of the biomass and ethanol concentrations as well as the growth rate in the Mezcal fermentation process. The algorithm performs its task having available only the ...

    • PI-controlled bioreactor as a generalized Liénard system 

      Ibarra Junquera, Vrani; Rosu Barbus, Haret-Codratian (Elsevier, 2007)
      "It is shown that periodic orbits can emerge in Cholette’s bioreactor model working under the influence of a PI-controller. We find a diffeomorphic coordinate trans-formation that turns this controlled enzymatic reaction ...

    • Supersymmetric free-damped oscillators: adaptive observer estimation of the Riccati parameter 

      Ibarra Junquera, Vrani; Rosu Barbus, Haret-Codratian; Cornejo Pérez, Octavio (2006)
      "A supersymmetric class of free damped oscillators with three parameters has been obtained in 1998 by Rosu and Reyes through the factorization of the Newton equation. The supple-mentary parameter is the integration constant ...