Auswahl der wissenschaftlichen Literatur zum Thema „Foresterie – Industrie et commerce – Modèles mathématiques“
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Dissertationen zum Thema "Foresterie – Industrie et commerce – Modèles mathématiques"
Bauer, Rodolphe. „La modélisation du volume des compartiments riches en composés chimiques extractibles (écorce et nœud) dans six essences d'intérêt des régions Grand-Est et Bourgogne Franche-Comté“. Electronic Thesis or Diss., Paris, AgroParisTech, 2021. http://www.theses.fr/2021AGPT0025.
Der volle Inhalt der QuelleIn a context of renewal of the chemical industry and the search for new outlets for forestry, extractives are becoming increasingly interesting molecules, both ecologically and financially speaking. In order to evaluate the relevance of these molecules as a new resource for the chemical industry and a potential outlet for forestry, it is necessary to make a preliminary evaluation of the resource. This requires knowledge of the volume of compartments rich in extractable material, particularly bark and knots. The present study therefore focuses on modeling bark and knot volumes. It focuses specifically on two French regions, the Grand Est and the Bourgogne-Franche-Comté, and on six important species, Abies alba, Picea abies, Pseudotsuga menziesii, Quercu robur, Quercus patraea, and Fagus sylvatica.This study is made possible, on one hand, by the use of a large database including numerous measurements of bark thickness made at different heights on the stems of many trees. On the other hand, new samplings have been made to allow X-ray scanning of nodes all along the stem and thus to determine precisely the volume on a computer picture.In order to model the available amount of bark, three types of models were built, models predicting the volume of bark, models predicting the surface area of bark along the stem and models predicting the thickness of bark at 1m30. The former achieved a relative root mean square error (RMSErel) of 16.7% to 27.5% depending on the species.The study of bark area models showed that it was possible to use a model independent of diameter-over-bark but that model using this variable are more accurate. The RMSErel achieved by these bark area models varied between 23 and 38% depending on the species and model considered.This work showed the importance of using the bark thickness at 1m30 as an input data. As it is rarely measured today, it was also modelled using the DBH. This allowed us to show the influence of altitude on bark thickness at 1.30 m for three species: Abies alba, Picea abies, Fagus sylvatica. The models obtained RMSErel of the models ranged from 26.8 to 36 % of RMSErel depending on the species considered.Finally, knot volumes have started to be studied. Although this work has not been fully completed, it already shows the importance of producing new models in order to fit the predicted knot patterns as closely as possible to reality. Moreover, the quantity of these compounds in the wood seems, at this stage of the study, to be too small to provide a large extractable resource, despite their great intrinsic richness. Their interest could therefore be more in the extraction of specific molecules
Ducloux, Pierre. „Modélisation du comportement dynamique et optimisation de la conduite d'une cristallisation discontinue de l'industrie sucrière“. Châtenay-Malabry, Ecole centrale de Paris, 1987. http://www.theses.fr/1987ECAP0061.
Der volle Inhalt der QuelleFournier, Gilles. „Application des modèles mathématiques de coût à la détermination des investissements dans l'industrie pétrolière“. Dijon, 1997. http://www.theses.fr/1997DIJOE008.
Der volle Inhalt der QuelleIt is today of paramount importance to realistically forecast the cost and time required to design and manufacture a given product, from the very first phase of the project. Furthermore, with the increasingly rapid development of technology, it is often impossible to draw a direct parallel with existing, well known products. Mathematical models of cost, and map models in particular, have been developed to meet this need. Although one may still refer to former products, they do not automatically have to be "analogous" to the product under consideration, because these methods use "universal relationships" between cost, weight, technology, performance and reliability, and also the nature and experience of the firm manufacturing the product. The purpose of this thesis is to demonstrate the pertinence, and more importantly the potential, of mathematical models of cost for the oil and gas industry, from exploration and production to refining, petrochemicals, and internal combustion engines. After a theoretical examination of estimation methods and a classification of existing ones, emphasis is placed on the logical aspect of these models. In addition, the complementarity between these tools and certain fields such as project management is pointed out, for example with respect to value control. The last chapter of the thesis is devoted to case studies. It aims chiefly at comparing theory with practice in order to identify the limits of mathematical models of cost so that they can be used judiciously
Minegishi, Shotaro. „Performance et fiabilité dans les délais de livraison de produits industriels assemblés : application à l'industrie automobile“. Châtenay-Malabry, Ecole centrale de Paris, 2003. http://www.theses.fr/2003ECAP0904.
Der volle Inhalt der QuelleArbod, Guillaume. „La croissance économique des pays pétroliers“. Dijon, 2007. http://www.theses.fr/2007DIJOE004.
Der volle Inhalt der QuelleThe literature tries to apprehend the weakness of the economic growth of oil countries by the assumption of ousted growth factors. In the Dutch Disease models the non-oil exporting sector would be ousted whereas in the analyses in terms of economic policies it would be the effective economic policies. We consider the phenomenon through the growth theories, the oil incomes being regarded as an additional exogenous income for the economy. In this manner the growth dynamic of oil countries, even the most unfavourable, can be modelled without utilizing any concept of economic inefficiency. The last part of our work is devoted to the Saudi economy. After having developed a macroeconometric model, and using scenarios of oil prices, we lead a forecasted analysis of this economy
Poncet, Anthony. „Fiabilité expérimentale : dimensionnement optimal d'essais sous contraintes : modélisation des facteurs endommageant le composant et intégration dans le dimensionnement de l'essai. Application à l'automobile“. Saint-Etienne, 2005. http://www.theses.fr/2005STET4016.
Der volle Inhalt der QuelleIn industry and in particular in automotive industry, it is important to contain engineering and manufacturing costs of products. However, it is also prejudicial not to contain reliability. Calculation of reliability and more precisely the link between field reliability and reliability in tests require new methods to take in account environmental factors during reliability test in order to validate a component. The developed method allows to have a representation of the damaging factors influences, with a proportional hazard model, in order to size an optimal validation test. The prior knowledge (expert judgments, passed tests,. . . ) is used to estimate these influences
Cadren, Muriel. „Modélisation à court terme des consommations de produits pétroliers en France“. Dijon, 1998. http://www.theses.fr/1998DIJOE007.
Der volle Inhalt der QuelleThe analysis of petroleum product demand became a privileged thrust of research following the modifications in terms of structure and level of the petroleum markets since eighties. The greatest importance to econometrics models of energy demand, joint works about nonstationary data, explained the development of error-correction models and the cointegration. In this context, the short term econometric modelling of petroleum product demand doesn't only focus on forecasts but also on the measure of the gain acquired from using error- correction techniques and cointegration. It's fitting to take the influence of technical improvement and environment pressures into account in econometric modelling of petroleum products demand. The first part presents the evolution of energy demand in France and more particularly the petroleum product demand since 1986. The objective is to determine the main characteristics of each product, which will help us to analyse and validate the econometrics models. The second part focus on the recent developments in times series modelling. We study the problem of nonstationary data and expose different unit root tests. We examine the main approaches to univariate and multivariate modelling with nonstationary data and distinguish the forecasts of the latter's. The third part is intended to applications. Its objective is to illustrate the theoretic developments of the second part with a comparison between the performances of different approaches (approach box and Jenkins, Johansen approach's and structural approach). The models will be applied to the main French petroleum market. The observed asymmetrical demand behaviour is also considered
Mathurin, Joël. „Applications de la théorie des jeux coopératifs à l'analyse économique de la coopération internationale : illustrations par l'étude du cas de la politique agricole commune“. Toulouse 1, 1997. http://www.theses.fr/1997TOU10081.
Der volle Inhalt der QuelleBeaudoin, Daniel. „Distributed wood procurement planning within a multi-firm environment“. Thesis, Université Laval, 2008. http://www.theses.ulaval.ca/2008/25120/25120.pdf.
Der volle Inhalt der QuelleDoucet, Carole. „Activités viticoles et développement régional“. Bordeaux 4, 2002. http://www.theses.fr/2002BOR40012.
Der volle Inhalt der QuelleBücher zum Thema "Foresterie – Industrie et commerce – Modèles mathématiques"
Soojin, Jun, und Irudayaraj Joseph 1961-, Hrsg. Food processing operations modeling: Design and analysis. 2. Aufl. Boca Raton: CRC Press, 2008.
Den vollen Inhalt der Quelle findenMian, M. A. Project economics and decision analysis. Tulsa, Okla: PennWell, 2002.
Den vollen Inhalt der Quelle findenGeroski, P. A. Barriers to entry and strategic competition. London: Routledge, 2001.
Den vollen Inhalt der Quelle findenProject Economics and Decision Analysis: Determinisitic Models. Fire Engineering Books & Videos, 2011.
Den vollen Inhalt der Quelle findenMian, Mohammad A., und M. A. Mian. Project Economics and Decision Analysis: Volume 1: Deterministic Models. Pennwell Books, 2002.
Den vollen Inhalt der Quelle findenMian, M. A. Project Economics and Decision Analysis: Probabilistic Models (Project Economics and Decision Analysis). Pennwell Books, 2002.
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