| HAL : hal-00286131, version 1 |
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| A model for dissipation: cascade SDE with Markov regime-switching and Dirichlet prior |
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| Didier Bernard 1Richard Emilion 2 |
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| (17/06/2008) |
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| Cascade Stochastic Differential Equation (SDE), a continuous time model for energy dissipation in turbulence, is a generalization of the Yaglom discrete cascade model. We extend this SDE to a model in random environment by assuming that its two parameters are switched by a continuous time Markov chain whose states represent the states of the environment. Moreover, a Dirichlet process is placed as a prior on the space of sample paths of this chain. We propose a Bayesian estimation method of this model which is tested both on simulated data and on real data of wind speed measured at the entrance of the mangrove ecosystem in Guadeloupe. |
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| 1 : | Laboratoire de physique de l'Atmosphère Tropicale (LPAT) |
| Université des Antilles et de la Guyane | |
| 2 : | Mathématiques - Analyse, Probabilités, Modélisation - Orléans (MAPMO) |
| Université d'Orléans – CNRS : UMR7349 | |
| 3 : | CEntre de REcherches en MAthématiques de la DEcision (CEREMADE) |
| CNRS : UMR7534 – Université Paris IX - Paris Dauphine | |
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| Domaine | : | Mathématiques/Statistiques Statistiques/Théorie |
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| Cascade model – Dirichlet process – dissipation – Mangrove – Markov regime switching – random environment – Stochastic Differential equation. |
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| Liste des fichiers attachés à ce document : | |||||
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| hal-00286131, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00286131 | |
| oai:hal.archives-ouvertes.fr:hal-00286131 | |
| Contributeur : Adaté Tossa | |
| Soumis le : Mardi 17 Juin 2008, 14:40:51 | |
| Dernière modification le : Mardi 17 Juin 2008, 16:07:18 | |