Tesis sobre el tema "Optimisation du coût total de production"
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Abubakar, Aminu Sahabi. "Contribution to the development of new maintenance strategies integrated to control charts for a production process under service levels, operational, and quality constraints". Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0055.
Texto completoThe current production industry is characterise by significant progress: a massive increase in high technology, the emergence of exigent customers, competitive markets, varied product quality, and random demands required the collaborations of the inter-related aspects of production. The production, maintenance, and quality are the most critical aspects of the industrial system. We are interested in optimising maintenance that plays a critical role in customer satisfaction, sustainability, and the development of companies. Our study is centred on developing production and maintenance integrated into a control chart of quality policy. We propose new integrated maintenance strategies with an in-depth analysis of the continuous production process reliability improvements and treated under customer requirements (Service, quality, and cost) constraints. The integration and optimal coordination of these factors of production is not easy and represent a challenge for industrial companies, and are more challenging with multi-assignable causes of production process variation. To address this problem, this research work employed the use of a control chart tool in combination with the AFNOR principles known as Rule of seven as involved in quality management. To monitor, analyses and direct appropriate maintenance actions for continuous system reliability improvements along the different multiple process scenarios as decision levels. We use the interactions between the production process and product quality for strategies of maintenance which reduce the failure of the production system by improving process reliability and reducing the no conformal products. The study Significantly focused on quality, quality tools, and their applications in production and maintenance control. The technique we used to optimise the maintenance and quality control of an integrated production system is a control chart tool based on statistical measurement and analysis of quality parameters. We model different production problems and develop a control policy for randomly failing production systems that must satisfy customer requirements dynamically throughout the finite production horizon. We introduced a mathematical model to minimise the total costs of production, inventory, maintenance, and quality control. The optimisation of the maintenance strategy was integrated into a control chart tool information. Based on the production rate variation and its impact on machine degradation the number of maintenance, times, and intervals needed for prudent decision-making is determined by the developed algorithm. In this context, this research presents the derivation for different cases of all the probabilities for the process to be in or out of control, the average run lengths, and the restoration cycle durations. Based on the degradation factor, new failure rate equations are formulated, and then the average failure rate for each case, we formulated different maintenance cost optimisation models. The proposed approach is useful for precise calculation and minimisation of the total maintenance cost. Which optimises total production cost considering all possible production process statuses due to multiple causes. Our work contributes to the emergence of quality management and performance improvement techniques that will contribute to the development of production companies
Bissey, Sebastien. "Optimisation du coût de la consommation d'électricité dans l'habitat individuel". Thesis, Tours, 2019. http://www.theses.fr/2019TOUR4029.
Texto completoThe work carried out as part of this thesis con'sisted in proposing solutions to optimize the cost of electricity consumption in individual housing. The hardware and software tools proposed here make it possible to estimate both the profitability of an electricity management system and the impact of good and simple daily actions. First, some solutions to save money in the single-family home were compared and evaluated. The electrical energy storage system has been introduced. Storage makes it possible, among other things, to shift electricity consumption from peak to off-peak hours and thus save money. In a second part, the prediction of electricity consumption based on fuzzy logic was introduced in order to use the storage system more efficiently. The profitability of storage systems and smart plugs was studied. In a third and final part, a highly efficient energy converter (above 95%) was introduced. The latter is necessarily bidirectional because the energy must be able to pass from the storage system to the distribution network and vice versa. The harmonic distortion rates of the signals must then be as low as possible (here, less than 8%). The originality of the proposed converter also lies in the simplicity of the necessary digital control circuits. SiC power devices were used to achieve the desired energy efficiency values. These components also increase the switching frequency and thus reduce the size of the filter elements
Berkoune, Djamel. "Optimisation de l'ordonnancement prenant en compte les tâches prévisionnelles". Valenciennes, 2005. http://ged.univ-valenciennes.fr/nuxeo/site/esupversions/447b7d18-7b4f-4074-8bd4-e36c1429ef39.
Texto completoIn this work, we consider the flexible job-shop scheduling problem with uncertain demands and we develop a new cooperative methodology to solve it. It is organized in two main parts. The first one consists in finding a scheduling for the firm demands. The second one consists in developing methods allowing of insertion the predicted demands in the solutions found initially with insertion methods (static method and dynamic method) while optimizing the considered criteria. To test the effectiveness of these solutions, we determine an approach based on the calculation of the lower bounds for the criteria, which calculation on the firm demands and on the estimated ones. A method of resolution for multicriterion problems is proposed to help the decision maker when it cannot give a particular preference to the criteria. Moreover, we validate these methods on a series of example. Finaly, we conclude this memory by listing some advantages of our methods
Babin, Anthony. "Optimisation du coût de revient global (TCO) d’un véhicule utilitaire électrique 3,5t ; modélisation multi-physique, dimensionnement et recharge intelligente". Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS356.
Texto completoThe electric vehicle is one of the environmentally friendly transport solutions that emit no pollutant during its use. Gruau, manufacturer-converter for light commercial vehicles (LCV), is actively involved in green transport in the 3.5t segment. In order to increase sales of electric LCV, it is necessary to reduce its total cost of ownership (TCO). The objective of this thesis is to study and model the behavior of the components of this electric vehicle in order to simulate TCO. The main component studied is the battery, whose limited lifetime will determine the profitability of the vehicle. The first part of the work was devoted to modeling the behavior of the vehicle according to a given customer mission. The study of battery cells was done with the aim of building a complete multi-physics model taking into account calendar aging and cycling aging. Then, this battery model is integrated in a complete energy model taking into account all the components of the studied vehicle. Then a global model, including this battery model, makes it possible to determine the energy required for a given path and to simulate the aging of the electrochemical cells in order to calculate the TCO. A second part is oriented towards the calculation of the TCO. The implementation of an optimization algorithm, with a methodology of computing acceleration, allowed to achieve the computations in reasonable times (reduction from 13h to 15min by iteration). After studying the impact of battery sizing on the TCO, it appears that the reduction of the battery capacity does not systematically lead to the reduction of the TCO. There is therefore an optimum TCO point for each mission (up to 17% savings). In order to improve the TCO, smart recharging strategies are developed and allow increasing e-LCV profitability (up to 29%). This work is integrated into a decision support software relative to the battery capacity according to customer needs, intended for commercial sales forces
Tan, Jun Liang. "Development of a pitch based wake optimisation control strategy to improve total farm power production". Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-304705.
Texto completoDoufene, Abdelkrim. "Architecture des systèmes complexes et Optimisation - Application aux véhicules électriques". Palaiseau, Ecole polytechnique, 2013. http://www.theses.fr/2013EPXX0011.
Texto completoBourry, Franck. "Management of uncertainties related to renewable generation participating in electricity markets". Paris, ENMP, 2009. http://tel.archives-ouvertes.fr/tel-00508345.
Texto completoThe operation of Renewable Energy Sources (RES) units, such as wind or solar plants, is intrinsically dependent on the variability of the wind or solar resource. This makes large scale integration of RES into power systems particularly challenging. The research work in the frame of this thesis focuses on the participation of renewable power producers in liberalized electricity markets, and more precisely on the management of the regulation costs incurred by the producer for any imbalance between the contracted and delivered energy. In such context, the main objective of the thesis is to model and evaluate different methods for the management of imbalance penalties related to the participation of renewable power producers in short-term electricity markets. First, the thesis gives a classification of the existing solutions for the management of these imbalance penalties. A distinction is made between physical solutions which are related to the generation portfolio, and financial solutions which are based on market products. The physical solutions are considered in the frame of a Virtual Power Plant. A generic model of the imbalance penalty resulting from the use of physical or financial solutions is formulated, based on a market rule model. Then, the decision-making problem relative to both physical and financial solutions is formulated as an optimization problem under uncertainty. The approach is based on a loss function derived from the generic imbalance penalty model. Finally, the uncertainty related to the RES production is considered in the risk-based decision making process. The methods are illustrated using case studies based on real world data
Aljubayli, Ramia. "Recherche opérationnelle et équilibrage de ligne d'assemblage orienté coût : le cas de la production d'automobiles dans l'usine syrienne de Hmisho". Nice, 2012. http://www.theses.fr/2012NICE0036.
Texto completoHaving a closer look at an automobile manufacturing plant, we find that the assembly line consists of many stations arranged sequentially. A product unit runs through the line in one direction and visits all stations that are interconnected by an automatic conveyor. This unit is subject to a series of operations carried out by operators for a limited time. During this period the operators should carry out all the required operations assigned to this station (less automation). The important issue to be addressed in the workshop is assigning operations along an assembly line in a way that no station is loaded more than the others. This issue is known as: the assembly line balancing problem. The objective of this thesis is to provide an optimal solution to this problem. Our study discusses the case of a manufacturing plant located in Syria. The study tries to solve the assembly line balancing problem with an objective of reducing production costs. Therefore, our key issue deals with determining a configuration associated with the minimum costs including the examination of optimization methods to be used. Two algorithms of operational research are proposed. The first is an exact method based on dynamic programming and the second is a heuristic algorithm based on the “Greedy” algorithm. By applying these algorithms to data of the “Hmisho Syrian plant” we find that the second algorithm gives better results with respect to the minimization of the production costs
Allen, Benoît. "Optimisation d'échangeurs de chaleur : condenseur à calandre, réseau d'échangeurs de chaleur et production d'eau froide". Thesis, Université Laval, 2010. http://www.theses.ulaval.ca/2010/27364/27364.pdf.
Texto completoAl, Abo Omar Emad. "Nouvelle approche pour la maîtrise de production des chantiers de bâtiments : le prototype OSEP d'Organisation, de Suivi et d'Evaluation de la production". Chambéry, 2003. http://www.theses.fr/2003CHAMS002.
Texto completoProduction is incontestably a very complex activity, in particular for the production of buildings. The control of productivity in construction industry is a real problem since companies are confronted with a great challenge : for a given selling price, the company engages, in front of the owner, to complete the project. The margin obtained at the end of project is not easily foreseeable. We propose to insert a new powerfull approach based on a computer-integrated and logistic on the building sites and their organization for ensuring a better control of production. Then, we develop a whole methodology based on a new cost and productivity indicators model (CIPM) allowing to access the project cost and to measure the productivity according to various evaluation modes. Finely, we propose a new generation of decision support tools facilitating the comparison and follow-up tasks. The prototype OSEP was developed for the organization, follow-up and assessment of the production on building sites. It is validated on a real construction operation of sixty flats in Chambéry (France)
Marzougui, Taher. "Réduction du coût énergétique d'un réseau d'irrigation agricole : optimisation de la facture, diagnostic de fuites et production énergétique locale à base des énergies renouvelables". Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0742/document.
Texto completoWater is abundant on earth, however, it is not evenly distributed on the globe. Thus, water distribution systems have been designed to meet different needs. In this context, to make fertile lands above the source, irrigation networks were implemented by operating pumping systems. However, pressurized networks are a source of huge energy expenditures and water losses that represent important economic issues. This is a major challenge for optimizing energy expenditure. The present thesis aims to analyze the energy cost of an irrigation network with application to the Carpentras canal.The objective of this work is to minimize the energy expenditure of the network. To do so, three approaches have been explored. Firstly, a study focused on the optimization of electricity contracts from an administrative point of view. The aim was to propose a methodology to optimize the cost of the electricity bill by acting on elements chosen by the operator. Secondly, a methodology for the detection and localization of possible leaks, in the irrigation network, is proposed. This method is based on the analysis of the circulation of water. Finally, a part was dedicated to the sizing of an energy production system based on the use of renewable sources
Marzougui, Taher. "Réduction du coût énergétique d'un réseau d'irrigation agricole : optimisation de la facture, diagnostic de fuites et production énergétique locale à base des énergies renouvelables". Electronic Thesis or Diss., Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0742.
Texto completoWater is abundant on earth, however, it is not evenly distributed on the globe. Thus, water distribution systems have been designed to meet different needs. In this context, to make fertile lands above the source, irrigation networks were implemented by operating pumping systems. However, pressurized networks are a source of huge energy expenditures and water losses that represent important economic issues. This is a major challenge for optimizing energy expenditure. The present thesis aims to analyze the energy cost of an irrigation network with application to the Carpentras canal.The objective of this work is to minimize the energy expenditure of the network. To do so, three approaches have been explored. Firstly, a study focused on the optimization of electricity contracts from an administrative point of view. The aim was to propose a methodology to optimize the cost of the electricity bill by acting on elements chosen by the operator. Secondly, a methodology for the detection and localization of possible leaks, in the irrigation network, is proposed. This method is based on the analysis of the circulation of water. Finally, a part was dedicated to the sizing of an energy production system based on the use of renewable sources
Schuller, Stéphane. "Optimisation technico-économique d'un cycle organique de Rankine : application à la géothermie et prise en compte de la variabilité de la source froide". Thesis, Nantes, 2016. http://www.theses.fr/2016NANT4016/document.
Texto completoGeothermal power production plants equipped with Organic Rankine Cycles (ORC) represent an alternative to conventional power stations and are in full expansion especially thanks to their low impact on global warming. Their development is accompanied by a deployment of this technology on increasingly complex operating sites, including relatively low temperature heat sources. From an engineering point of view, these features make it particularly difficult to achieve a real economic profitability. With this in mind, we developed an ORC plant sizing model, which takes into account physical data related to the site (temperature and flow of the hot source, meteorological data of the cold source) and economic data (price of equipment according to their size, business plan including the cost of production and the specific cost). By applying of exergendobar and pseudocricondenpolytropic new concepts, the study also gives the process engineer concrete benchmarks among the multitude of cycle design possibilities. This sizing model helps to confirm the importance of cold sink temperature and its variability in ORC plant design. Parametric studies of the model demonstrate that the objectives of production cost and specific cost could not be simultaneously satisfied, but the analysis of results aims to help project decision-makers make the best possible technical-economic decision
Rezig, Wafa. "Problèmes de multiflots : état de l'art et approche par décomposition décentralisée du biflot entier de coût minimum". Phd thesis, Université Joseph Fourier (Grenoble), 1995. http://tel.archives-ouvertes.fr/tel-00346082.
Texto completoMertz, Théophile. "Optimisation simultanée de la configuration et du dimensionnement des réseaux de chaleur urbains". Thesis, Pau, 2016. http://www.theses.fr/2016PAUU3019/document.
Texto completoThe aim of this thesis is to develop a method that provides design assistance for District Heating Network (DHN). This tool allows simultaneously the optimization of the configuration and its sizing, thanks to an MINLP formulation (Mixed Integer Non-Linear Programming). Binary variables help to choose the optimal configuration (network layout and technologies of production), whereas continuous variables help DHN sizing (temperature, diameter, velocity, heat exchanger area, thermal generating capacity …). The objective function to minimize is the total cost (capex and opex), subjected to numerous nonlinear constraints (e.g. thermal losses, pressure drop, energy balance).This method enables to design temperature cascade between consumers, when consumer temperature requirements are different, and also looped network (only one pipe in one trench). It helps also the decision to connect (or not) consumers to the main network and also the location(s) and type(s) of the heating plant. Moreover, the arbitrage between heat losses and pressure drops is taken into account thanks to physical considerations (non-linear equations). Eventually, it is possible to design 4th generation DHN and prove their financial profitability over the long terms (30 years). First a multi-step resolution strategy is proposed to ensure finding global optimum of the complex MINLP problem. Then academic study cases are analyzed to underline the numerous assets of the formulation. Finally, the optimal design compared to an existing DHN ensures the consistency of the method and allows to build a study case at a wider scale, which can be solved thanks to the comprehensive strategy developed. The design assistance method is available for initial design as well as for extension of existing DHN
Apete, Geoffroy Kokou. "Optimisation médico-économique et organisation des services d'urgences hospitalières : apport des systèmes multi-agents". Phd thesis, Université du Droit et de la Santé - Lille II, 2011. http://tel.archives-ouvertes.fr/tel-00668083.
Texto completoSavourey, David. "Ordonnancement sur machines parallèles : minimiser la somme des coûts". Phd thesis, Université de Technologie de Compiègne, 2006. http://tel.archives-ouvertes.fr/tel-00156405.
Texto completoinférieures a également été réalisée. Enfin, nous avons proposé une méthode de résolution exacte utilisant les règles de dominance ainsi que les bornes inférieures.
Boukef, Hela. "Sur l’ordonnancement d’ateliers job-shop flexibles et flow-shop en industries pharmaceutiques : optimisation par algorithmes génétiques et essaims particulaires". Thesis, Ecole centrale de Lille, 2009. http://www.theses.fr/2009ECLI0007/document.
Texto completoFor flexible job-shop and pharmaceutical flow-shop scheduling problems resolution, two optimization methods are considered: a genetic algorithm one using a new proposed coding and a particle swarm optimization one modified in order to be used in discrete cases.The criteria retained for the considered packaging lines in pharmaceutical industries multi-objective problems are production cost minimization and total stopping cost minimization. For the flexible job-shop scheduling problems treated, the criterion taken into account is Makespan minimization.These two methods have been applied to various work-shops with distinct complexities to show their efficiency.After comparison of these methods, the obtained results allowed us to notice the efficiency of the based particle swarm optimization method in terms of convergence and reaching optimal solution
Basma, Hussein. "Energy management strategies for battery electric bus fleet". Thesis, Université Paris sciences et lettres, 2020. http://thesesprivees.mines-paristech.fr/2020/2020UPSLM036_archivage.pdf.
Texto completoInitiatives to decrease emissions from the transport sector are increasing worldwide by seeking alternative technologies to replace oil-based mobility. Battery Electric Buses (BEB) present a promising solution thanks to their high energy efficiency, low greenhouse gas emissions and the absence of local pollutant emissions. However, this technology still faces many challenges, especially its high total cost of ownership (TCO) and other operational factors such as the limited bus driving range, the high energy refueling time, and the required charging technologies and strategies. In this context, this thesis presents a systematic methodology that aims at developing solutions to help overcoming these challenges by providing optimal battery sizing and charging strategy for BEB. First, a comprehensive multi-physical bus energy model is developed to evaluate its energy needs considering all the energy systems encountered within. The energy consumption of the bus is then evaluated at a variety of operating conditions. Then, a techno-economic model of an entire bus line is developed in order to assess the impact of different battery sizing and charging strategies on the costs and operation of BEB. A TCO model is introduced considering the BEB unit costs, battery purchase and replacement costs, energy and power costs, infrastructure, and maintenance costs. A case study in Paris city is presented and the analysis reveals the resulting tradeoff between the TCO and BEB schedule disruptions and delays as function of different battery sizes and charging strategies. A methodology to minimize the TCO of BEB deployment is presented providing the optimal battery sizing and charging strategy for BEB, while respecting the BEB operation constraints. The methodology is a 2-step optimization algorithm that utilizes both Dynamic programming and Genetic Algorithm optimization routines. The results show that the proposed methodology could reduce the BEB TCO between 15-25% compared to the currently adopted approaches to deploy BEB