Zobrazeno 1 - 10
of 107
pro vyhledávání: '"Tewfik SARI"'
Autor:
Tewfik Sari
Publikováno v:
AIMS Mathematics, Vol 9, Iss 7, Pp 18625-18669 (2024)
The aim of this paper is to show that Tilman's graphical method for the study of competition between two species for two resources can be advantageously used for the study of commensalism or syntrophy models, where a first species produces the substr
Externí odkaz:
https://doaj.org/article/4c77a0a01b984eeca86c0d0077edbfea
Publikováno v:
Mathematical Biosciences and Engineering, Vol 17, Iss 6, Pp 6278-6309 (2020)
This paper deals with thorough analysis of serial configurations of two chemostats. We establish an in-depth mathematical study of all possible steady states, and we compare the performances of the two serial interconnected chemostats with the perfor
Externí odkaz:
https://doaj.org/article/ec395e0bddd14efdafae21e9d7637204
Autor:
Boumediene Benyahia, Tewfik Sari
Publikováno v:
Mathematical Biosciences and Engineering, Vol 17, Iss 5, Pp 5504-5533 (2020)
This paper deals with a mathematical analysis of two-steps model of anaerobic digestion process, including dynamics of soluble microbial products (SMP). We propose to investigate effects of the new variable SMP on qualitative properties of the proces
Externí odkaz:
https://doaj.org/article/aff700ef7b814e86925e7fe53f8a81c8
Publikováno v:
Revista Integración, Vol 40, Iss 1 (2022)
Externí odkaz:
https://doaj.org/article/c4a071b7920942a899893c1d2cb61c0a
Autor:
Mustapha Lakrib, Tewfik Sari
Publikováno v:
Electronic Journal of Differential Equations, Vol 2010, Iss 40,, Pp 1-24 (2010)
We prove averaging theorems for non-autonomous ordinary differential equations and retarded functional differential equations in the case where the vector fields are continuous in the spatial variable uniformly with respect to the time and the soluti
Externí odkaz:
https://doaj.org/article/60e87ff45b7e4c5cb92b5508f5db13c7
Publikováno v:
Electronic Journal of Differential Equations, Vol 1998, Iss 19, Pp 1-22 (1998)
Slow and fast systems gain their special structure from the presence of two time scales. Their analysis is achieved with the help of Singular Perturbation Theory. The fundamental tool is Tykhonov's theorem which describes the limiting behaviour, for
Externí odkaz:
https://doaj.org/article/53442bcabeac4f048d353432e4ddc7a2
Publikováno v:
Qualitative Theory of Dynamical Systems. 22
Publikováno v:
Journal of Mathematical Biology. 85
In this paper, we consider a three-tiered food web model in a chemostat, including chlorophenol, phenol, and hydrogen substrates and their degraders. The model takes into account the three substrate inflowing concentrations, as well as maintenance, t
In our search for emergent catchment-scale hydrological laws, we discuss here how a class of widely-used water-balance formulas (Turc-Mezentsev and Tixeront-Fu) were conceived by their authors more than 60 years ago. Because these water balance formu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09f8aa5072d8c20873be35e1b5ed04db
https://doi.org/10.5194/iahs2022-692
https://doi.org/10.5194/iahs2022-692
Publikováno v:
Bulletin of Mathematical Biology. 84
The present work considers the model of two chemostats in series when a biomass mortality is considered in each vessel. We study the performance of the serial configuration for two different criteria which are the output substrate concentration and t