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Статті в журналах з теми "Extinction (biologie) – Modèles mathématiques":
Feugeas, J. P. "Quand imagerie et modèles mathématiques viennent au secours de la biologie clinique." Bio Tribune Magazine 28, no. 1 (August 2008): 5. http://dx.doi.org/10.1007/bf03001638.
HOCH, T., P. PRADEL, and J. AGABRIEL. "Modélisation de la croissance de bovins : évolution des modèles et applications." INRAE Productions Animales 17, no. 4 (October 5, 2004): 303–14. http://dx.doi.org/10.20870/productions-animales.2004.17.4.3605.
Дисертації з теми "Extinction (biologie) – Modèles mathématiques":
Gaucel, Sébastien. "Analyse mathématique et simulations d'un modèle prédateur-proie en milieu insulaire hétérogène." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2005. http://tel.archives-ouvertes.fr/tel-00263910.
Fabre, Virginie. "Réponse démographique des Néandertaliens face aux pressions environnementales du stade isotopique 3 : approche par modélisation écologique." Thesis, Aix-Marseille 2, 2011. http://www.theses.fr/2011AIX20711/document.
The Neanderthal population lived and thrived in Europe during about 300ky in Middle Pleistocene. The causes of their disappearance about 30ky ago are strongly debated. Among the current hypotheses developed to explain this demographical crisis, competition with Modern humans, climate changes, epidemic diseases or demographical changes have often been evoked. The aim of this thesis was to re-analyse these assumptions and their determinants by using mathematical modelling. Models are used here to synthesize the data obtained by classical paleoanthropological studies and try to understand the complex and unknown phenomenon relative to the dramatic demographic fluctuation observed in Neanderthal populations during OIS3. Classical mathematical models are firstly used to analyse the influence of both demographical parameters and environmental stresses on the Neanderthal population. Next, we created new deterministic models more specified to the Neanderthal population. After checking the relevance of these models, we used them to analyse the demographical crisis of OIS3 and the information given by modelling have been checked with the information supplied by classical paleoanthropological, zooarchaeological and prehistorical studies. Our results allowed us to exclude the assumption of an epidemic disease or a climate change or even a resource competition as a cause of Neanderthal extinction whereas competition in a broad sense and above all demographic change could have led, under specific conditions, to Neanderthal demise. A demographic modification in the Neanderthal population across the time, in terms of fecundity or maturation speed, could be the reason of Neanderthals disappearance
Ed-Darraz, Abdelkarim. "Modèles de dynamique des populations dans un environnement aléatoire." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066591/document.
This thesis addresses some issues associated with population dynamics in random environment. Random environment is described by a Markov process with values in a finite space and which, involve certain forces on the choice of vital rates, will lead the population dynamics. When the dynamic is modeled by a birth and death process, we will answer the question : When almost surely extinction settled ? (Bacaër and Ed-Darraz, 2014). In (Ed-Darraz and Khaladi, 2015) we are interested to the final size of an epidemic in random environment. J Math Biol. 69 (1) :73-90 Ed-Darraz A, Khaladi M (2015) On the final epidemic size in random environnement, Math. Biosc 266 : 10-14
Zalduendo, Vidal Nicolás Mauricio. "Processus de branchement bi-sexués multi-types." Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0285.
The bisexual Galton-Watson process, introduced by Daley, is an extension of the classical Galton-Watson process, but taking into account the mating of females and males, which form couples that can accomplish reproduction. Properties such as extinction conditions and asymptotic behaviour have been studied in the past years in the single-type case, but multi-type versions have only been treated in some particular cases. In this thesis we deal with a general multi-dimensional version of Daley's model, where we consider different types of females and males, which mate according to a “mating function”. We consider that this function is superadditive, which in simple words implies that two groups of females and males will form a larger number of couples together rather than separate. One of the main difficulties in the study of this process is the absence of a linear operator that is the key to understand its behavior in the asexual case, but in our case it turns out to be only concave. To overcome this issue, we use a concave Perron-Frobenius theory which ensures the existence of eigen-elements for some concave operators. Using this tool, we find a necessary and sufficient condition for almost sure extinction as well as laws of large numbers. We also study the convergence of the process in the long-time through the identification of a supermartingale, and the existence of quasi-stationary distributions for the subcritical regime. Finally, some extensions to models with random mating function and models in continuous time are considered
Pellegrin, Xavier. "Oscillations dans des modèles mathématiques issus de la biologie." Paris 7, 2014. http://www.theses.fr/2014PA077263.
Ln this report, we focus on mathematical analysis of two models coming from biology. The first model, a Kuramoto model, describes the time-evolution of a large number of mean-field coupled phase oscillators. The second one is an original oscillation model, based on a singuiar perturbation of a delayed differential equation. It had been introduced in relation with oscillatory patterns observed in neural networks, and it is subject fo mathematical analysis since the 1980's
Djermoune, Makhlouf. "Explosion et extinction de la température dans les matériaux viscoplastiques thermo-adoucissants." Metz, 1999. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/1999/Djermoune.Makhlouf.SMZ9946.pdf.
Yoccoz, Gilles Nigel. "Le rôle du modèle euclidien d'analyse des données en biologie évolutive." Lyon 1, 1988. http://www.theses.fr/1988LYO10111.
Cardin-Bernier, Guillaume. "Simplification de modèles mathématiques représentant des cultures cellulaires." Thèse, Université de Sherbrooke, 2015. http://hdl.handle.net/11143/8159.
Baup, Stéphane. "Elimination de pesticides sur lit de charbon actif en grain en présence de matière organique naturelle : élaboration d'un protocole couplant expériences et calculs numériques afin de simuler les équilibres et les cinétiques compétitifs d'adsorption." Poitiers, 2000. https://tel.archives-ouvertes.fr/tel-00983252.
Consalvi, Jean-Louis. "Développement d'un modèle diphasique dédié au calcul de l'interaction d'un brouillard d'eau et d'un feu en milieu compartimenté : application à la lutte incendie." Aix-Marseille 1, 2002. http://www.theses.fr/2002AIX11058.
Книги з теми "Extinction (biologie) – Modèles mathématiques":
Pavé, Alain. Modélisation en biologie et en écologie. Lyon: Aléas, 1994.
V, Jean Roger, ed. Une approche mathématique de la biologie. Chicoitimi, Québec: Gaëtan Morin, 1987.
1940-, Jean Roger, ed. Une Approche mathématique de la biologie. Chicoutimi, Qué: Morin, 1987.
Bertrandias, F. Mathématiques pour les sciences de la nature et de la vie. Grenoble: Presses universitaires de Grenoble, 1990.
Thom, René. Structural stability and morphogenesis: An outline of a general theory of models. Redwood City, Calif: Addison-Wesley, Advanced Book Program, 1989.
Thom, René. Structural stability and morphogenesis: An outline of a general theory of models. Reading, Mass: Addison-Wesley Pub., 1989.
Chauvet, Gilbert. Comprendre l'organisation du vivant et son évolution vers la conscience. Paris: Vuibert, 2006.
Gotelli, Nicholas J. A primer of ecology. Sunderland, Mass: Sinauer Associates, 1995.
Gotelli, Nicholas J. A primer of ecology. 2nd ed. Sunderland, Mass: Sinauer Associates, 1998.
Mazumdar, J. An introduction to mathematical physiology and biology. 2nd ed. Cambridge: Cambridge University Press, 1999.