Littérature scientifique sur le sujet « Générateur de temps stochastique »
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Articles de revues sur le sujet "Générateur de temps stochastique"
Zahar, Y., et J. P. Laborde. « Une méthode stochastique pour la prédétermination des fluctuations probables des durées de service des réservoirs collinaires en Tunisie ». Revue des sciences de l'eau 11, no 1 (12 avril 2005) : 25–42. http://dx.doi.org/10.7202/705295ar.
Texte intégralArnaud, P., et J. Lavabre. « La modélisation stochastique des pluies horaires et leur transformation en débits pour la prédétermination des crues ». Revue des sciences de l'eau 13, no 4 (12 avril 2005) : 441–62. http://dx.doi.org/10.7202/705402ar.
Texte intégralDetemple, Jérôme B., et Richard E. Kihlstrom. « Acquisition d’information dans un modèle intertemporel en temps continu ». L'Actualité économique 63, no 2-3 (27 janvier 2009) : 118–37. http://dx.doi.org/10.7202/601413ar.
Texte intégralAbi-Zeid, I., et B. Bobée. « La modélisation stochastique des étiages : une revue bibliographique ». Revue des sciences de l'eau 12, no 3 (12 avril 2005) : 459–84. http://dx.doi.org/10.7202/705360ar.
Texte intégralColrat, Jean-Luc. « Entre vie et mort : Figures troubles de la mort : Giacometti, Cotan, Zurbaran ». Figures de l'Art. Revue d'études esthétiques 5, no 1 (2001) : 195–211. http://dx.doi.org/10.3406/fdart.2001.1246.
Texte intégralAbdeladim, Kamel, Abdelhak Razagui, Smail Semaoui, Salim Bouchakour, Amar Hadj Arab et Saliha Boulahchiche. « Méthodologie de prévision du rayonnement solaire ». Journal of Renewable Energies 20, no 3 (30 septembre 2017) : 505–10. http://dx.doi.org/10.54966/jreen.v20i3.644.
Texte intégralLouvrier-Clerc, Maud, et Vanessa Mendez. « Le rapport au temps : un critère d’évaluation clé dans l’accompagnement d’entrepreneurs, activateur de sens et générateur de transformation ». Vie & ; sciences de l'entreprise 205, no 1 (2018) : 128. http://dx.doi.org/10.3917/vse.205.0128.
Texte intégralZili, Mounir. « Sur l'unicite forte des solutions d'une equation differentielle stochastique avec drift singulier dependant du temps en dimension un ». Stochastics and Stochastic Reports 62, no 1-2 (novembre 1997) : 21–29. http://dx.doi.org/10.1080/17442509708834126.
Texte intégralImberty, Michel. « Formes de la répétition et formes des affects du temps dans l'expression musicale ». Musicae Scientiae 1, no 1 (mars 1997) : 33–62. http://dx.doi.org/10.1177/102986499700100104.
Texte intégralCollard, Luc. « Approche sociologique des sports à risque ». STAPS 18, no 44 (1997) : 83–96. http://dx.doi.org/10.3406/staps.1997.1261.
Texte intégralThèses sur le sujet "Générateur de temps stochastique"
Bourotte, Marc. « Générateur stochastique de temps multisite basé sur un champ gaussien multivarié ». Thesis, Avignon, 2016. http://www.theses.fr/2016AVIG0415/document.
Texte intégralStochastic weather generators are numerical models able to simulate sequences of weather data with similar statistical properties than observed data. However, few of them are able to simulate several variables (with precipitation) at different sites from one region. In this thesis, we propose an original model of stochastic generator based on a spatio-temporal multivariate Gaussian random field. A first methodological work was needed to develop a completely non separable cross-covariance function suitable for the spatio-temporal multivariate nature of studied data. This cross-covariance function is a generalization to the multivariate case of spatio-temporal non-separable Gneiting covariance in the case of the family of Matérn. The proof of the validity of the model and the estimation of its parameters by weighted pairwise maximum likelihood are presented. An application on weather data shows the interest of this new model compared with existing models. The multivariate Gaussian random field allows the modeling of weather variables residuals (excluding precipitation). Residuals are obtained after normalization of variables by seasonal means and standard deviations, themselves modeled by sinusoidal functions. The integration of precipitation in the stochastic generator requires the transformation of a component of the Gaussian random field by an anamorphosis function. This anamorphosis function can manage both the occurrence and intensity of precipitation. The corresponding component of the Gaussian random field corresponds to a rain potential, correlated with other variables by the cross-covariance function developed in this thesis. Our stochastic weather generator was tested on a set of 18 stations distributed over the Mediterranean area (or close) in France. The conditional and non-conditional simulation of daily weather variables (maximum and minimum temperature, average wind speed, solar radiation and precipitation) for these 18 stations show good result for a number of statistics
Cassinelli, Alvaro. « Processeurs parallèles optoélectroniques stochastiques pour le traitement d'images en temps réel ». Phd thesis, Université Paris Sud - Paris XI, 2000. http://pastel.archives-ouvertes.fr/pastel-00715890.
Texte intégralKrouma, Meriem. « Ensemble weather forecast using a stochastic weather generator and analogs of the atmospheric circulation ». Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPASJ010.
Texte intégralEnsemble weather forecasts can help to better manage and anticipate the risks of extreme weather events. Nevertheless, weather forecasting is a complex task due to the chaotic behaviour of the atmosphere, which is a major source of uncertainties for sub-seasonal time scale (days to a month). To overcome these uncertainties, a large number of numerical simulations are required. It allows to determine the statistical distribution of the climate variables. In this thesis, we have developed a weather ensemble forecasting tool based on statistical and probabilistic methods to generate weather ensemble forecasts. The stochastic weather generator is designed to mimic the behaviour of climate variables based on atmospheric circulation analogs. We have tested this tool to forecast different climate variables such as European precipitation and the Madden-Julian oscillation. We have evaluated the performance of our forecasts using several forecast verification methods. In addition, we compared the performance of our forecast to other forecasts from international weather centers.We start by assessing the capacity of the stochastic weather generator to simulate precipitation in Europe at the local scale (city level). We found good performances in different regions of Europe for up to 10 days. We confirmed the importance of atmospheric circulation in the forecast of meteorological parameters. We also identified the influence of high and low pressure on good and bad forecasts. As a second step, we combined the stochastic weather generator with dynamical model outputs to obtain large ensembles of European precipitation forecasts up to 35 days ahead at a very local scale. This led to a significant improvement over the forecasts of the European Centre for Medium-Range Weather Forecasts and Météo-France.Finally, we adjusted our model to forecast the Madden Julian Oscillation (MJO). The MJO is responsible for heavy precipitation in densely populated regions such as India. Our model provides a forecast of the MJO up to 40 days in advance and is competitive with numerical weather predictions. The results of this thesis have been the subject of (published and in discussion) scientific papers.Some other work on the predictability of meteorological variables has also been developed
Semghouni, Samy Rostom. « Modélisation stochastique des transactions temps réel ». Le Havre, 2007. http://www.theses.fr/2007LEHA0012.
Texte intégralReal-time database systems (RTDBSs) are systems designed to address the applications which need real-time processing of large quantities of data. An RTDBS must guarantee the transactions ACID (Atomicity, Consistency, Isolation, Durability) properties on one hand, and must schedule the transactions in order to meet their individual deadlines, on the other hand. In this thesis, we focus on stochastic and probabilistic study of the behavior of real-time transactions. The study is conducted under some assumptions such as the arrival mean of transactions, transactions type, concurrency control protocol (an optimistic and a pessimistic), and scheduling policy. We have then designed and developed a flexible and extensible RTDBS simulator, on which the study is done. The obtained results have shown that the transactions behavior can be approximated by a probabilistic model. The model is used to predict the transactions success ratio according to the system workload. We also propose a new scheduling policy for real-time transactions which uses criteria based on both transaction deadlines and transaction importance. This policy contributes to enhance the system performances (maximization of committing transactions), improving then the RTDBSs quality of service
Bracquemond, Cyril. « Modélisation stochastique du vieillissement en temps discret ». Phd thesis, Grenoble INPG, 2001. http://tel.archives-ouvertes.fr/tel-00004670.
Texte intégralLomüller, Victor. « Générateur de code multi-temps et optimisation de code multi-objectifs ». Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENM050/document.
Texte intégralCompilation is an essential step to create efficient applications.This step allows the use of high-level and target independent languages while maintaining good performances.However, many obstacle prevent compilers to fully optimize applications.For static compilers, the major obstacle is the poor knowledge of the execution context, particularly knowledge on the architecture and data.This knowledge is progressively known during the application life cycle.Compilers progressively integrated dynamic code generation techniques to be able to use this knowledge.However, those techniques usually focuses on improvement of hardware capabilities usage but don't take data into account.In this thesis, we investigate data usage in applications optimization process on Nvidia GPU.We present a method that uses different moments in the application life cycle to create adaptive libraries able to take into account data size.Those libraries can therefore provide more adapted kernels.With the GEMM algorithm, the method is able to provide gains up to 100~\% while avoiding code size explosion.The thesis also investigate runtime code generation gains and costs from the execution speed, memory footprint and energy consumption point of view.We present and study 2 light-weight runtime code generation approaches that can specialize code.We show that those 2 approaches can obtain comparable, and even superior, gains compared to LLVM but at a lower cost
Cantet, Philippe. « Impacts du changement climatique sur les pluies extrêmes par l'utilisation d'un générateur stochastique de pluies ». Montpellier 2, 2009. http://www.theses.fr/2009MON20232.
Texte intégralRecent studies showed difficulties to detect the trends on rainfall extreme phenomenon. That is why; an original approach is proposed to estimate the impacts of climate change on extreme rainfall by using an hourly rainfall stochastic generator. Climate evolution is detected from the generator parameterisation. Compared to usual methods, the generator parameters are estimated by average, and not by extreme, values of daily climatic characteristics. At the beginning, we focus on the modelisation of phenomena which influence the asymptotic behaviour of the generator. Based on the copula theory, the dependence between some generator variables is modelised and lead to a better regeneration of the extreme precipitation depth. Then a study shows the generator has a robust behaviour according to available data while it proposes a good estimation of rainfall quantiles. Simulations permit us to choose an adapted trend test and to show the modelisation of the studied phenomenon is of great importance in the relevance of the parameter stationarity rejection. A method is created to test a regional trend in a homogenous climatic zone from the construction of “regionalized” chronicles. From the daily information of 139 rain gauge stations, the stationarity of generator parameters was studied in metropolitan France between 1960-2003. Tests were performed from a local approach and from a regional one. A regional approach seems better to take into account a real change and to reduce the sampling problem. Changes observed on average rainfall characteristics are amplified when working with extreme events. The observed trends occur mainly between December and May when the rainfall occurrence increased during the four last decades in the most zones. Up to now, the taking into account of climate change does not lead to a big change in the quantiles estimation, when compared to their estimation under a hypothesis of stationary climate. However extreme rainfalls seem to be more frequent on the whole French territory except in the Mediterranean area. Besides, we propose an application by combining the climate model predictions and the rainfall generator. According to these results, it seems, for example, the heavy precipitation will increase in the Lorraine northern and in the Cevennes eastern during the 21st century
Peccati, Giovanni. « Chaos brownien d'espace-temps, décompositions d'Hoeffding et problèmes de convergence associés ». Paris 6, 2002. http://www.theses.fr/2002PA066288.
Texte intégralLeblanc, Frédérique. « Estimation par ondelettes de la densité marginale d'un processus stochastique : temps discret, temps continu et discrétisation ». Paris 6, 1995. http://www.theses.fr/1995PA066369.
Texte intégralMiliani, El Hadj. « Commande d'un convertisseur matriciel : application à un générateur actif ». Besançon, 2005. http://www.theses.fr/2005BESA2086.
Texte intégralThe author proposes a contribution to the control of a naturally commutated matrix converter used in a variable speed constant frequency generating system. The association of the matrix converter and the synchronous generator is called active generator. This work describes a low cost and robust solution for the frequency conversion by using natural commutations. In the first chapter, the author presents several examples of variable speed constant frequency generating systems which transform the variable speed mechanical energy to a constant frequency electrical power. The matrix converter topology and its operation principle are also described. In order to present the active generator, a detailed study of the association “matrix converter - six-phase synchronous generator” is detailed in the second chapter; the system operation under several constraints is given too. In the third chapter, the author presents an innovative control strategy which permits the simultaneous control of the frequency, the phase and the amplitude of the output wave; this strategy is based on cosine modulation waves. Contrary to the control strategy presented in the first chapter, this control philosophy permits to obtain a regulated output wave. The output voltage waveform is done in such a way that the actual output waveform always has the nearest possible instantaneous value to a sinusoidal reference waveform of desired output frequency, desired phase and amplitude. Commutation instants are determined by the intersection of the reference voltage and the cosine modulation waves. The last chapter deals with the implementation of the control strategies on a digital signal processor DSP. Experimental results are presented and compared to those obtained by simulation
Livres sur le sujet "Générateur de temps stochastique"
service), SpringerLink (Online, dir. Stochastic analysis in discrete and continuous settings : With normal martingales. Berlin : Springer, 2009.
Trouver le texte intégralP, Harrington David, dir. Counting processes and survival analysis. New York : Wiley, 1991.
Trouver le texte intégralNonlocal quantum field theory and stochastic quantum mechanics. Dordrecht : D. Reidel pub. Co., 1986.
Trouver le texte intégralPrivault, Nicolas. Stochastic Analysis in Discrete and Continuous Settings : With Normal Martingales. Springer London, Limited, 2009.
Trouver le texte intégralDong, Hongli, Zidong Wang et Nan Hou. Networked Non-Linear Stochastic Time-varying Systems. Taylor & Francis Group, 2021.
Trouver le texte intégralDong, Hongli, Zidong Wang et Nan Hou. Networked Non-Linear Stochastic Time-Varying Systems : Analysis and Synthesis. Taylor & Francis Group, 2021.
Trouver le texte intégralDong, Hongli, Zidong Wang et Nan Hou. Networked Non-Linear Stochastic Time-Varying Systems : Analysis and Synthesis. Taylor & Francis Group, 2021.
Trouver le texte intégralChapitres de livres sur le sujet "Générateur de temps stochastique"
Bertoin, Jean. « Temps locaux et integration stochastique pour les processus de dirichlet ». Dans Lecture Notes in Mathematics, 191–205. Berlin, Heidelberg : Springer Berlin Heidelberg, 1987. http://dx.doi.org/10.1007/bfb0077634.
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