Dissertationen zum Thema „Optimisation de planification“
Geben Sie eine Quelle nach APA, MLA, Chicago, Harvard und anderen Zitierweisen an
Machen Sie sich mit Top-50 Dissertationen für die Forschung zum Thema "Optimisation de planification" bekannt.
Neben jedem Werk im Literaturverzeichnis ist die Option "Zur Bibliographie hinzufügen" verfügbar. Nutzen Sie sie, wird Ihre bibliographische Angabe des gewählten Werkes nach der nötigen Zitierweise (APA, MLA, Harvard, Chicago, Vancouver usw.) automatisch gestaltet.
Sie können auch den vollen Text der wissenschaftlichen Publikation im PDF-Format herunterladen und eine Online-Annotation der Arbeit lesen, wenn die relevanten Parameter in den Metadaten verfügbar sind.
Sehen Sie die Dissertationen für verschiedene Spezialgebieten durch und erstellen Sie Ihre Bibliographie auf korrekte Weise.
Tétreault, Mario. „Planification et optimisation de trajectoire pour un manipulateur“. Thesis, University of Ottawa (Canada), 1989. http://hdl.handle.net/10393/5793.
Der volle Inhalt der QuelleColin, Richard. „Optimisation de la planification des cueillettes d'huiles usagées“. Mémoire, École de technologie supérieure, 2011. http://espace.etsmtl.ca/918/1/COLIN_Richard.pdf.
Der volle Inhalt der QuelleFatemi, Seyyedeh Zohreh. „Planification des essais accélérés : optimisation, robustesse et analyse“. Phd thesis, Université d'Angers, 2012. http://tel.archives-ouvertes.fr/tel-01004379.
Der volle Inhalt der QuelleChaimatanan, Supatcha. „Planification stratégique de trajectoires d'avions“. Phd thesis, Université Paul Sabatier - Toulouse III, 2014. http://tel.archives-ouvertes.fr/tel-01064452.
Der volle Inhalt der QuelleHrouga, Mustapha. „Optimisation de la logistique inverse et planification du désassemblage“. Thesis, Troyes, 2016. http://www.theses.fr/2016TROY0021/document.
Der volle Inhalt der QuelleIn this thesis, we mainly deal with lot sizing problems by disassembling with a structure of products to disassemble with two levels and without commonality components. We treat two different problems. In the first problem, we consider a single product whose contribution focuses on developing the two programming models integers. The first model is considered without lost sales where all demands must be satisfied, and the second one is considered with lost sales where demands may not be met. To solve this problem, we first develop an analytical approach to calculate the surplus stocks (before solving the problem) at the end of the planning horizon. Then we adapt three heuristics known for their performance and widely used in the lot sizing problem of production "Silver Meal, Part Period Balancing and Least Unit Cost". In the second problem, we consider a number of products with capacity constraint, and the contribution relates to the extension of the two previous models. The first is considered without lost sales and the second with lost sales. Regarding the resolution of this problem and given its complexity, a genetic algorithm is first proposed. Then, to improve this algorithm, we integrate a Fix-and-Optimize heuristic in the latter while offering a hybrid approach. Finally, various tests are performed on different literature instances to demonstrate the effectiveness and limitations of each solving approach
Oulad, Kouider Tayeb. „Optimisation de la planification des tournées de véhicules électriques“. Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0154.
Der volle Inhalt der QuelleThe transport sector is the leading greenhouse gas-emitting sector, and accounts for nearly a third of the energy consumed in France. Therefore, in the current context of ecological emergency, the development of green mobility has become a global economic issue. The electric vehicle is a sustainable alternative that complies with environmental requirements. We were interested in how to adapt the delivery system of a company interested in converting its fleet of internal combustion vehicles with a fleet of electric vehicles. The electric vehicle has three challenges: driving range, recharging time and the lack of recharging stations. These three challenges impose a specific organization of delivery routing to determine the best routes at minimum cost. In our work, we propose and evaluate optimization methods for solving this problem in order to obtain viable solutions
Zhang, Pengcheng. „Optimisation de la planification en radiothérapie prostatique et ORL“. Thesis, Rennes 1, 2014. http://www.theses.fr/2014REN1S042/document.
Der volle Inhalt der QuelleThis work focuses on the optimization of planning in prostate and head-and-neck radiation therapy. In order to improve the dose calculation, the Pencil Beam method was firstly modified by considering a spherical coordinate system, by improving the heterogeneities correction method and by accelerating the calculation by performing the convolution operations using the Fast Fourier Transform. The proposed approach was compared to conventional methods using different numerical phantoms. This evaluation demonstrated the accuracy of the proposed method and the acceleration of the calculations by a factor 40 by the method using the Fast Fourier Transform, but at the cost of deterioration in the accuracy of the results. In a second step, the incorporation of biological criteria in the optimization of the treatment plan has been implemented through an equivalent convex NTCP constraints and its optimization. The evaluation of this approach has been performed on the data of ten patients treated for prostate cancer and has shown that the proposed method produces clinically satisfactory plans with better results in terms of predicted toxicity. A method to compensate geometric uncertainties occurring during treatment has also been proposed, based on the expansion in series of Taylor and a Butterworth filter. Its evaluation has shown its effectiveness in reducing high-frequency oscillations as well as the presence of hot and cold spots. Finally, in the context of adaptive radiotherapy in head and neck, a study was conducted to identify the optimal scenario of replannings, i.e. the number and timing of replannings. The comparison criteria were based on the calculation of the cumulative dose received by the parotid during the whole treatment. The effectiveness of the replanning has been demonstrated, for example with a decreased risk of toxicity 9% for the optimal scenario. The perspectives of this work relate to the combination of these methods in a comprehensive planning process to assess their clinical impact
Simonin, Cécile. „Planification de ressources multiples pour la recherche d’information“. Rennes 1, 2008. ftp://ftp.irisa.fr/techreports/theses/2008/simonin.pdf.
Der volle Inhalt der QuelleThis PhD is related to Search Theory, which is the field of Operations Research which deals with maximizing the detection of one or more (static or moving) targets, by optimizing the detection resources placement. Our work deals with the detection of Markovian targets, when search resources are scarce compared to the size of the space of search where targets are hidden. The space of search must then be partitioned into search zones, to which search resources (sensors) must be allotted. It results in hierarchical search problems, which have not been much studied in the literature. Two problems of importance for the Intelligence community are stated. First, we consider cross-cueing search. In such problems, a target needs to be detected at the same time by two different sensors. We also consider the cross-cueing search in a monosensor framework: a target must be detected by the same sensor at consecutive time periods. Then, the multitarget search is detailed. In this kind of problems, the goal is to optimize search of more than one targets by means of a unique sensor
Gibon, David. „Planification dosimétrique en radiochirurgie stéréotaxique : optimisation tridimensionnelle de la balistique“. Lille 1, 1993. http://www.theses.fr/1993LIL10148.
Der volle Inhalt der QuelleLu, Zhiqiang. „Planification hiérarchisée et optimisation des systèmes logistiques avec flux inverses“. Nantes, 2003. http://www.theses.fr/2003NANT2006.
Der volle Inhalt der QuelleBenhizia, Faten. „OPTIMISATION DU PLAN DE TRANSPORT PAR PLANIFICATION INTEGREE DES RESSOURCES“. Thesis, Saint-Etienne, EMSE, 2012. http://www.theses.fr/2012EMSE0668/document.
Der volle Inhalt der QuelleThe planning of railway production at the french national railways (sncf) is currently based on a mainly sequential process in which the design of railway timetabling widely conditioning design planning of railway equipment (rolling stock), then one of the train drivers (driver rosters). this strategy of sequential planning of railway resources massively adopted for practical and scientific reasons (expertise, complexity of the railway system, etc.). however, this strategy generates solutions which can be more expensive and less robust to uncertainties, because decisions taken at any given stage can significantly reduce the overall feasible solutions of the following steps.given this situation and the strong interaction between these heterogeneous and very expensive resources, the thesis deals with the feasibility and inputs of a process where these critical resources could be planned and optimized in an integrated way. the thesis focuses on the feasibility study, prototyping and validation of an integrated approach for planning rolling stocks and drivers, so as to improve the efficiency of the overall transportation plan, increase sncf competitiveness and enhance the quality of its services. we propose a mixed integer linear programming formulation of the rolling stock/ train drivers integrated planning problem. in this mathematical model, each planning sub-problem is formalized and coupling constraints are further introduced to model the interdependencies of these two resources when they are simultaneously used for train production. in this heuristic, the solution of the lagrangian dual and the calculation of feasible solutions are performed by calling two proprietary software modules available at sncf for planning rolling stocks and train drivers. the heuristic is tested experimentally with real data from the ter bretagne region, and several evolutions are introduced in the models and algorithms so as to improve their performances.validation tests on of real data sets at an industrial scale are encouraging and, when compared to a traditional (sequential) approach, show gain of up to 4% for train drivers used
Moad, Kamel. „Modélisation et optimisation multi-niveaux du transport forestier“. Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0101/document.
Der volle Inhalt der QuelleThe present manuscript tackles the supply chain forest transportation problem in the context of forestry primary industry. In this context, several risks may affect the forest supply chain: the unpredictable weather conditions (tree falling provoked by major storms); sanitary emergencies (tree pest and diseases); and, diverse commercial circumstances (the variability of market demands). The aforementioned issues motivate the diverse forest sector protagonists (entrepreneurs, forest operators and drivers) to seek support for improving their logistic operations. The aim of this effort is to improve the service quality (offer-demand agreement) diminishing in this way the total costs. Therefore, the main goal of this thesis is the proposal of a novel management model which improves forest-to-mill transport performance. At the same time, the proposed model accounts for the forest sector manners and constraints. The contribution of this thesis is threefold: first a transportation model is developed, later on the transport planning is managed, and finally an optimization procedure is proposed.The thesis results propose a hierarchical planning for the forestry transportation. Two decision levels are suggested: tactic and operational. At a tactic level, a multi-period optimization is considered. The multi-period optimization strategy meets the customer supply demands while minimizes the global transportation activity. Such strategy takes into account the restrictions of the total available transportation means. Moreover, at this level the activity balancing politics may be developed, as well as subcontractors coordination between transport companies. On the other hand, at the operational level, the tactic planning assigned for each transporter is divided so an optimization of the fleet’s transport assignation is done considering the vehicles constraints.The decision process is modelled as a Mixed Linear Programming formulation. The application considers a data set coming from the industry settled at the Aquitaine region in France. The results have shown a significant improvement on the transport capabilities with respect to the conventional transport practices.It is worth to mention that the decision models were designed such that they may be adapted to different context either collaborative or not. In both cases, the tactic planning has a generic purpose, in other words, it is independent of the kind of organization involved, whereas specific organizations are taken into account when planning actors’ activities at the operational level
Schmidt, Pascal. „Planification multi-niveaux avec expertise humaine“. Thesis, Toulouse, ISAE, 2012. http://www.theses.fr/2012ESAE0023/document.
Der volle Inhalt der QuelleAutomated planning is a field of Artificial Intelligence which aims at automatically computing a sequence of actions that lead to some goals from a given initial state. However, solving realistic problems is challenging because finding a solution path may require to explore an exponential number of states with regard to the number of state variables. To cope with this combinatorial explosion, efficient algorithms use heuristics, which guide the search towards optimistic or approximate solutions. Remarkably, hierarchical methods iteratively decompose the planning problem into smaller and much simpler ones. In a vast majority of problems, the planner must deal with constraints, such as multiple predefined phases or protocols. Such constraints generally help solving the planning problem, because they prune lots of search paths where these constraints do not hold. In this thesis, we assume that these constraints are known and given to the planner. We thus propose a new method to model and solve a deterministic planning problem, based on a hierarchical and heuristic approach and taking advantage of these constraints. We inspired ourselves from structured programming formalisms in order to offer a more intuitive modeling framework in the domain of hierarchical planning to the user. We also proposed a planning algorithm able to exploit this formalism and build strategies at various levels of granularity, thus allowing to plan quickly a global strategy, while still being able to overcome the difficulties at lower level. This algorithm showed its performances compared with the main HTN planner, SHOP2, on classical planning problems
Lengagne, Sébastien. „Planification et re-planification de mouvements sûrs pour les robots humanoïdes“. Montpellier 2, 2009. http://www.theses.fr/2009MON20104.
Der volle Inhalt der QuelleThese works deal with the computation of optimal motions for the humanoid robots. Most of the motion planning methods come from the motion planning of the manipulator robots. They rely on optimization algorithms which need a motion parametrization and a time-discretization of the constraints that define the physical limits of the robot. We show that a time-grid discretization is hazardous for the safety and the integrity of the robot. That is why, we propose a new method for the guaranteed discretization that computes the extrema of the constraints over time-interval that covers the whole motion duration. This method of discretization is time consuming. Thus, we developped a hybrid method that ensures the constraint validity within the same range of time of the state-of-the-art methods. With this method, we created a database of motions to follow a moving target. Consequently, we can generate an optimal motion that fits to the environment. However, there is no method which is fast enough to compute a new motion adapted to a new environment. Thus, we present a re-planning method that produces a new motion from a previous one. To do it, we compute, offline, a feasable sub-set around the motion that respects the constraint validity. The re-planning process consists in finding, in this sub-set, a new motion that is adapted to the new environment. We tested this re-planning method with a kicking motion where the position of the ball changes and we are able to find and adapted motion within 1. 5s of CPU-time
Comelli, Michael. „Modélisation, optimisation et simulation pour la planification tactique des chaînes logistiques“. Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2008. http://tel.archives-ouvertes.fr/tel-00730176.
Der volle Inhalt der QuelleGondran, Alexandre. „Modélisation et optimisation de la planification des réseaux locaux sans fil“. Phd thesis, Université de Technologie de Belfort-Montbéliard, 2008. http://tel.archives-ouvertes.fr/tel-00416060.
Der volle Inhalt der QuelleNotre modélisation est basée sur le calcul du débit réel offert en chaque point de demande de service du réseau. Nous montrons que ce critère de débit réel permet une modélisation complète de la qualité de service car il unifie les critères habituels de couverture, de gestion des interférences et de capacité.
Notre optimisation traite simultanément le problème de placement des points d'accès et le problème d'affectation de fréquences par un algorithme à Voisinages Variables Aléatoires VVA : à chaque itération de cette recherche locale le type de voisinage est tiré au hasard. Cet algorithme est très modulaire et permet facilement de combiner les deux sous problèmes (placement et affection).
Ces travaux ont donné lieu à des collaborations et partenariats industriels : logiciel de planification globale des WLAN avec Orange Labs et solutions de planification séquentielle avec la start-up Trinaps.
Enfin nous approfondissons la modélisation du problème en explicitant les liens entre le calcul du débit réel et les SINR. Dans une première étape, nous montrons que les contraintes de seuil sur les SINR induisent un problème de T-coloration de graphe (condition nécessaire). Pour obtenir une équivalence rendant compte des interférences multiples, une généralisation du problème de T-coloration pour les hypergraphes est introduite. Dans une seconde étape, nous définissons un algorithme déduisant les seuils de SINR à partir des contraintes sur les débits réels. Cette nouvelle modélisation est la base de nos développements futurs.
Al, Chami Zaher. „Planification en Distribution Urbaine : Optimisation des tournées dans un contexte collaboratif“. Thesis, Bourgogne Franche-Comté, 2018. http://www.theses.fr/2018UBFCA016/document.
Der volle Inhalt der QuelleNowadays, transportation plays a key role in our modern countries’life, in particular for the goods flows. The logistics of flows between regions, countries and continents have benefited from technological and organizational innovations ensuring efficiency and effectiveness. It has not been the same at the urban scale, especially in city centers: the management of flows in a high population density environment has not yet found its organizational model. Today, urban logistics or "last mile" management is therefore a major issue, both socio-political and environmental as well as economic. Urban logistics is characterized by several actors (shippers or owners of goods, customers, carriers, public authorities, ...) each with different priorities (reduction of pollution, improvement of service quality, minimization of total distance traveled, ...). To overcome these challenges, one possible lever is to optimize the distribution and/or collection of goods in the context and under the constraints of the city.The goal of this PhD work is then to plan the distribution of goods in a logistics network, approached from a collaboration angle between shippers. This collaboration consists in grouping the demands of several shippers to optimize the loading rate of the trucks and to obtain better transport prices. Here, managing the "last mile" is similar to what is known in the literature as the Pickup and Delivery Problem (PDP). In this thesis, we are interested in variants of this problem more adapted to the urban context. After having realized a state of the art on the combinatorial optimization problems around the transport and the methods used for their resolution, we study two new variants of the problem of collection and delivery: the Selective PDP with Windows and Paired Demands and the Multi-period PDP with Windows and Paired Demands. The first allows carriers to deliver the maximum number of customers in a day for example; with the second, and in case of impossibility of delivery in this period, we determine the best delivery date by minimizing the distance traveled. Each of them is the subject of a formal description, of a mathematical modeling in the form of a linear program, then of a resolution by exact methods, heuristics and metaheuristics, in single-objective and multi-objective cases. The performance of each approach was evaluated by a substantial number of tests on instances of different sizes from the literature and / or that we generated. The advantages and drawbacks of each approach are analyzed, in particular in the context of collaboration between shippers
Masmoudi, Oussama. „Optimisation de la planification des systèmes industriels en présence de contraintes énergétiques“. Thesis, Troyes, 2016. http://www.theses.fr/2016TROY0031/document.
Der volle Inhalt der QuelleIn this thesis, we deal with the production planning problem in a flow-shop system with energy consideration. The manufacturing system is composed of reliable machines separated by buffers with infinite capacities. The planning horizon is defined by a set of periods where each one is characterized by a length, an electricity price, a maximal allowed power and an external demand of each product. The purpose is to minimize the total production cost composed of electricity, inventory, set-up (or product series change) costs and a required power per period.In the first step, we propose mathematical models for a single item capacitated lot-sizing problem in a flow-shop system. Since this problem is known to be NP-hard, approximating methods are developed in order to provide solutions with good quality in a reasonable time (dedicated heuristics, Fix and Relax heuristic, genetic algorithm).In the second step, a generalization of the model for multi-items is considered. Similarly to the first case, approximating methods are proposed to solve this problem
BROCHET, CAMILLE. „Planification et maintien a poste de constellations de satellites : modelisation, optimisation, simulation“. Toulouse 3, 1999. http://www.theses.fr/1999TOU30017.
Der volle Inhalt der QuelleGomez, Urrutia Edwin David. „Optimisation intégrée des décisions en planification et ordonnancement dans une chaîne logistique“. Thesis, Saint-Etienne, EMSE, 2014. http://www.theses.fr/2014EMSE0744/document.
Der volle Inhalt der QuelleIn this thesis, we study the optimization of flow planning and scheduling, within a strategy to integrate decisions for supply chain planning at tactical level, taking into account operational constraints. The goal of this work is to address the need for consistency between decisions arising from production planning and scheduling. These decisions are often taken in a sequential order, leading most of the time to unfeasible production plans. We propose an integrated approach to solve single-level and multi-level problems in multi-item multi-resource systems configured as job-shops.Both capacitated production planning and scheduling problems, in complex manufacturing systems, are NP-hard. Therefore, integrating constraints of both problems generates a new problem which is even more difficult to solve. We propose a decomposition of the integrated problem into a set of several sub-problems with fixed sequence, solved by Lagrangian Relaxation. The sequence improvement is guided by a Tabu Search. The efficiency of the integrated approach comparing to a standard solver is proved in terms of solution quality and computational effort. In case of multi-level problems, we propose a new mathematical model based on the concept of echelon stock, as well as new algorithms and smoothing strategies to build production plans respecting detailed capacity and bill-of-materials constraints
Duquesne, Christophe-Marie. „Intégration du déploiement de flotte et du service aux passagers dans la gestion de la planification pour compagnie aérienne“. Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00953136.
Der volle Inhalt der QuelleLengagne, Sebastien. „Planification et re-planification de mouvements sûrs pour les robots humanoïdes“. Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2009. http://tel.archives-ouvertes.fr/tel-00431302.
Der volle Inhalt der QuelleHamiez, Jean-Philippe. „Coloration de graphes et planification de rencontres sportives : heuristiques, algorithmes et analyses“. Angers, 2002. http://www.theses.fr/2002ANGE0053.
Der volle Inhalt der QuelleSlama, Ilhem. „Modélisation et optimisation de problème de planification de désassemblage dans un environnement incertain“. Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2020. http://www.theses.fr/2020IMTA0192.
Der volle Inhalt der QuelleOur research proposes to model and optimize the disassembly lot-sizing problem. The contributions presented in this manuscript focus on disassembly planning in certain and uncertain context. We have considered three main models with their resolution approaches: (i) a deterministic multi-period modeling that deals with a multilevel product structure with a commonality of components that aims to maximize total profit. A Mixed Integer Linear Programming (MILP) model is proposed to optimally solve the problem, (ii) a single period stochastic model with a two-level disassembly system and a single type of end-of-life product under random refurbishing lead times. This model seeks to minimize the total expected cost, composed of inventory and backlog costs. A Newboy approach is proposed to solve the problem, and (iii) a multi-period stochastic model which deals with the uncertainty of refurbishing lead times when order crossover is considered. Stochastic Mixed Integer Linear Program, Monte Carlo simulation and scenario aggregation approaches are proposed to solve the proposed model. The performances of the proposed resolution approaches are presented by analyzing the optimization results on a set of randomly generated instances
Le, Maitre Amandine. „Optimisation de l'utilisation de l'imagerie TEP pour la planification de traitement en radiothérapie“. Thesis, Brest, 2012. http://www.theses.fr/2012BRES0029.
Der volle Inhalt der QuelleThere has been an increasing interest for the use Positron Emission Tomography (PET) combined with Computed Tomography for radiotherapy treatment planning. It improves target volume delineation by reducing inter and intra-observer variability and allows visualizing biological heterogeneities. Plethoras of segmentation algorithm have been proposed but there is a lack of consensus regarding which one to use. Monte Carlo simulations are interesting to validate these algorithms since they allow creating datasets with known ground-truth and for which all acquisition parameters are controlled.We proposed several methodologies for improving the realism of simulations. Several datasets incorporating patient specific variability in terms of anatomy and activity distributions, realistic tumor shape and activity modeling and integrating the respiratory motions were created.These data were used in a first study concerning target volume definition. Several algorithms were compared for radiotherapy treatment planning. The accuracy of segmentation was related to the quality of ground-truth volume coverage. We also studied the impact of respiratory motion on segmentation accuracy.We investigated the use of an advanced segmentation method able to define high uptake sub-volumes, for heterogeneous dose prescriptions. Several scenarios of prescriptions were compares in terms of Tumor Control Probability (TCP) computed on PET images. Variability of this TCP due to acquisition parameters was quantified. The impact of contrast and size of sub-volume was studied. Finally we studied the usefulness of the addition of compartments to such heterogeneous prescriptions
Hamdi, Faiza. „Optimisation et planification de l'approvisionnement en présence du risque de rupture des fournisseurs“. Thesis, Ecole nationale des Mines d'Albi-Carmaux, 2017. http://www.theses.fr/2017EMAC0002/document.
Der volle Inhalt der QuelleTrade liberalization, the development of mean of transport and the development economic of emerging countries which lead to globalization of supply chain is irreversible phenomen. They can reduce costs, in return, they multiply the risk of disruption from upstream stage to downstream stage. In this thesis, we focus on the inbound supply chain stage. We treat more specifically the case of a purchasing central to select suppliers and allocate the orders. Each of the suppliers cannot deliver its orders due to internal reasons (poor quality problems) or external reasons (natural disasters, transport problems). According to the selected suppliers deliver their orders or not, the transaction operation will generate a profit or loss. The objective of this thesis is to provide decision support tools to a decision maker faced with this problem by taking into account the behavior of decision maker toward risk. We proposed stochastic mixed integer linear programs to model this problem. In the first part, we focuses on the development of a decision support visual tool that allows a decision maker to find a compromise between maximizing the expected profit and minimize the risk of loss. In the second part, we integrated the techniques of estimation of risk VaR and CVaR in this problem. The objective is to help decision maker to minimize the expected cost and minimize the conditional value at risk simultanously via calculating of VaR. Result shows that the decision maker must tack into account the different scenarios of disruption regardless their probability of realisation
Chamaret, Blaise. „Outils de planification pour les réseaux cellulaires“. Saint-Etienne, 1999. http://www.theses.fr/1999STET4002.
Der volle Inhalt der QuelleJauberthie, Carine. „Méthodologies de planification d'expériences pour systèmes dynamiques“. Compiègne, 2002. http://www.theses.fr/2002COMP1434.
Der volle Inhalt der QuelleDesport, Pierre. „Planification tactique de chaîne d'approvisionnement en boucle fermée : modélisation, résolution, évaluation“. Thesis, Angers, 2017. http://www.theses.fr/2017ANGE0012/document.
Der volle Inhalt der QuelleSupply chains are ubiquitous across industries and a considerable effort has been invested in supply chain management techniques over the last decades. In Telecommunications service industries, it often involves repair operations and consequently takes place in a closed-loop supply chain. In this context, supply chain management is concerned with optimally planning movements of faulty parts and spare parts based on a demand forecast and in the face of conflicting objectifs (stock out, storage, repair, transfer). This thesis describes this optimisation problem and based on a case study. Specifically, we consider a tactical planning decision support system. This system depends on a generic modeling of the problem that can be applied on a wide range of supply chains. We present an exact method and a metaheuristic to solve this problem and evaluate our approaches against a variety of instances of different sizes. We also study the ability to emulate specific management policies (e.g., just-in-time replenishment, minimal repair) by weighting the objectives. Finally, we investigate how to apply successive plans generated by the system and study the capability to face forecast uncertainties
Phouratsamay, Siao-Leu. „Coordination des décisions de planification dans une chaîne logistique“. Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066547/document.
Der volle Inhalt der QuelleThis thesis focus on the coordination of planning decisions in a two-level supply chain composed of one supplier and one retailer. Each actor wants to minimize his own cost. The planning decisions independently took by the actors can lead to a poor performance in terms of costs, hence the necessity of coordination. We study cost sharing mechanisms between the actors by designing contracts. In this work, we consider the case where the retailer (resp. supplier) can impose his optimal production plan to the supplier (resp. retailer). Different cost sharing hypothesis, as well as the asymmetric information problem are taking into account in this thesis. We also perform an experimental analysis in order to evaluate the decrease of the supply chain cost obtained when the actors cooperate. This context leads us to study new lot-sizing problems for which we propose a complexity analysis and dynamic programming algorithms in order to solve them. We also propose a theoritical study of two-level lot-sizing problems with inventory bounds
Afilal, Mohamed. „Optimisation de la prévision et de la planification des activités d’un centre d’urgence hospitalier“. Thesis, Troyes, 2017. http://www.theses.fr/2017TROY0035.
Der volle Inhalt der QuelleOur research focuses on the optimization of the activities of a hospital emergency department in order to improve the quality of services offered to patients. We have decomposed our approach into two areas: demand forecasting and optimization of activities. The first axis consists in forecasting the daily inflow of patients into the department. To this end, a new emergency classification of emergency patients, named EP, is introduced, taking into account the medical resources needed to treat the patient and post-emergency affiliation. We developed predictive models to forecast the daily inflow by EP class in the long-term and short-term. The second axis is to optimize service activities to minimize the average waiting time of patients in the service. To achieve this purpose, a system performance evaluation tool based on discrete event simulation was developed. This tool allowed us to evaluate the average waiting time of patients for different organizations of the service. Afterwards, we focused on optimizing the allocation of human resources (doctors, interns, nurses and caregivers). A meta-heuristic approach has been developed to solve the problem, since the objective function is not linear, which is based on the coupling of a genetic algorithm with the simulation model to evaluate the solutions. This approach also optimizes service in the future by injecting patient forecasts into the simulator
Fortuny, Cédric. „Estimation du trafic, planification et optimisation des ressources pour l'ingénierie des réseaux IP/MPLS“. Toulouse 3, 2008. http://thesesups.ups-tlse.fr/1198/.
Der volle Inhalt der QuelleIP networks have become critical systems in the last decade: service interruptions or even significant service degradations are less and less tolerable. Therefore, a new network engineering approach is required to help design, plan and control IP architectures on the basis of supervision information. Our contributions to this new approach are related to traffic matrix estimation from SNMP link loads, to IP routing weights optimization and to network dimensioning. The models and algorithms proposed in this thesis take into account many technological constraints in order to provide operational solutions
Sassi, Ons. „Planification de la recharge et optimisation des tournées dans le cas de flottes captives“. Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0303.
Der volle Inhalt der QuelleElectric Vehicles may decrease transportation-related emissions and provide for less dependence on foreign oil. However, electric vehicles are still facing many weaknesses related to the high purchase prices, limited battery range and scarce charging infrastructure. The deployment of electric vehicles must then involve the design and the deployment of charging infrastructures. Within this study, the overall objective is to provide enhanced optimization methods and decision tools for electric vehicles assignment, charging and routing that are relevant to different real-world constraints. Firstly, we propose to study the joint scheduling and optimal charging of electric vehicles problem. This problem consists in assigning a set of already constructed routes to the available electric and conventional vehicles and in, simultaneously, optimizing the electric vehicles charging costs while ensuring that all constraints are satisfied. The objective of this problem is to maximize the use of EVs and to minimize charging costs. Secondly, we propose different extensions to our baseline problem and we vary the objective functions and the considered constraints. Moreover, our problem can be seen as a fixed interval scheduling problem with complementary constraints of energy. We propose then to study the complexity and the approximability of many variants of this new problem. Finally, we consider a new variant of the electric vehicle routing problem with a heterogeneous fleet of vehicles and we propose different heuristics and metaheuristics to solve it. We test the different solving methods on benchmark instances and we evaluate the efficiency of each method
Forsell, Nicklas. „Planification dans le risque et l'incertain : optimisation des stratégies de gestion spatiale des forêts“. Toulouse 3, 2009. http://www.theses.fr/2009TOU30260.
Der volle Inhalt der QuelleThis thesis concentrates on the optimization of large-scale management policies under conditions of risk and uncertainty. In paper I, we address the problem of solving large-scale spatial and temporal natural resource management problems. To model these types of problems, the framework of graph-based Markov decision processes (GMDPs) can be used. Two algorithms for computation of high-quality management policies are presented: the first is based on approximate linear programming (ALP) and __ the second is based on mean-field approximation and approximate policy iteration (MF-API). The applicability and efficiency of the algorithms were demonstrated by their ability to compute near-optimal management policies for two large-scale management problems. It was concluded that the two algorithms compute policies of similar quality. However, the MF-API algorithm should be used when both the policy and the expected value of the computed policy are required, while the ALP algorithm may be preferred when only the policy is required. In paper II, a number of reinforcement learning algorithms are presented that can be used to compute management policies for GMDPs when the transition function can only be simulated because its explicit formulation is unknown. Studies of the efficiency of the algorithms for three management problems led us to conclude that some of these algorithms were able to compute near-optimal management policies. In paper III, we used the GMDP framework to optimize long-term forestry management policies under stochastic wind-damage events. The model was demonstrated by a case study of an estate consisting of 1,200 ha of forest land, divided into 623 stands. We concluded that managing the estate according to the risk of wind damage increased the expected net present value (NPV) of the whole estate only slightly, less than 2%, under different wind-risk assumptions. Most of the stands were managed in the same manner as when the risk of wind damage was not considered. However, the analysis rests on properties of the model that need to be refined before definite conclusions can be drawn
Abdoul, Soukour Anas. „Planification d’employés dans le secteur de la sûreté aéroportuaire“. Amiens, 2012. http://www.theses.fr/2012AMIE0110.
Der volle Inhalt der QuelleIn this thesis, we present a staff scheduling problem in airport security service. The work developed here is held as part of CIFRE thesis (2009-2012), with collaboration of ICTS France, MIS laboratory of the University of Picardy Jules verne, HeuDiaSyc laboratory of the University of Technology of Compiègne and with the ANRT. Elaborating planning is a hard process which requires satisfying legal constraints, employee's satisfaction and client's satisfaction. Staff scheduling problem is commonly solved in several steps (days-off scheduling, shift scheduling, and staff assignment). We focus on the last step staff assignment. First we propose a mathematical modeling of the problem and then propose approximate solving methods by providing two algorithms, a greedy algorithm and a global assignment algorithm which provide an initial solution. This solution will be improved by an iterative time out Destruction/Construction algorithm which alternates partial destruction and reconstruction steps. Then we propose a simulated annealing algorithm, and we propose a memetic algorithm based on a local search which uses three neighborhoods. These algorithms have been validated on real cases. Besides providing better solutions than the software currently used, these algorithms enable to provide solutions with significant improvements towards initial solution
Morin, Pierre-Antoine. „Planification et ordonnancement de projets sous contraintes de ressources complexes“. Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30291/document.
Der volle Inhalt der QuelleThe project structure arises in many fields of industry and services. It consists in performing a set of activities that may be linked by precedence relations, and use resources whose capacity is limited. The objective is to minimize a criterion usually linked to the duration or the cost of the project. Most of project scheduling problems in the literature assume that the same time scale should be used to determine activity start and completion dates and check resource constraints at each time. However, although it is often required in practice to build a precise schedule specifying the execution range of each activity, the resource usage can be evaluated on an aggregated basis, like worker shifts. In this thesis, a new model that enables the integration of these two time scales is presented in order to define the periodically aggregated resource-constrained project scheduling problem (PARCPSP). This problem is studied within the framework of complexity theory and several structural properties are established, highlighting major differences with the standard resource-constrained project scheduling problem (RCPSP). These properties allow deriving exact formulations based on integer linear programming, whose linear relaxations are compared. Moreover, several heuristics, such as schedule generations schemes, or an approached method based on a multi time scale iterative process, are proposed. Experimental results show the interest of these different methods and point out the intractability of the problem
Kanoun, Oussama. „Contribution à la planification de mouvement pour robots humanoïdes“. Phd thesis, Université Paul Sabatier - Toulouse III, 2009. http://tel.archives-ouvertes.fr/tel-00446757.
Der volle Inhalt der QuelleAmadou, Bachir. „Planification à long terme de réseaux d'aéroports, approche d'optimisation“. Thesis, Toulouse 3, 2021. http://www.theses.fr/2021TOU30016.
Der volle Inhalt der QuelleIn the last decades with the era of globalisation, air transportation has been playing an important economic role by easing the transportation of people and goods between the different parts of the World and to remote areas within countries. The airports as ground/air intermodal terminals are the ground segment of the air transport system. Sustained investments over long periods of several decades appear essential to maintain or expand airport operations. These investments are in general costly and airport investment planning is an important issue at the local and national levels. The objective of this thesis is to present a long-term planning approach for the investments in national airports networks. A framework for the long-term generation of multimodal transportation demand scenarios at the national level, which insures coherency between the prediction of the different transportation modes and assure compatibility between the predicted air transportation flows between the considered airports, is proposed. Then the central decision problem for long-term resource allocation between the different airports of a national network is formulated as an optimization problem. This model can be solved with different demand scenarios, where extreme scenarios should provide an interval for the necessary financial effort at each stage of the planning horizon for each airport. To solve the resulting optimization problems a Dynamic Programming approach has been considered where the candidate states to be processed at each stage are generated by a Petri Net built from the undated master plans of the airports of the considered network. The proposed approach is illustrated in the case of a large under developed country (Niger Republic)
Boudia, Mourad. „Coordination de la planification de la production et de la distribution“. Troyes, 2006. http://www.theses.fr/2006TROY0012.
Der volle Inhalt der QuelleThis thesis studies an optimisation problematic in supply chain. Usually, production planning is treated without considering the distribution level and handles rarely transportation costs. In the same way, vehicle routing problems suppose that the amounts to be delivered are known and work on a production plan already built. This work presents a coordinated optimisation method in which a production plan and delivery trips are simultaneously built, over several periods. This approach is mostly profitable in sectors where production costs are of the same order as tranportations costs, like livestock feed or fertilizers industry. Two main parts compose this thesis. The first one considers the case with one product. One mathematical model is presented and several heuristics reinforced by local search are developped. More powerful methods based on the GRASP metaheuristic with path-relinking and on memetic algorithms are also elaborated. The second part is devoted to the case with several products and ressources conflicts. A iterative and hybrid approach is developed for this configuration. It is based on the solution of one linear program representing the production planning and on a tabu search metaheuristic with post-optimisation procedures for the distribution level. All the methods presented in this theses for the two cases are validated by an intensive testing. Significant savings are obtained compared to classical decoupled methods, that consider production and distribution separately
Ouzizi, Latifa. „Planification de la production par co-décision et négociation de l'entreprise virtuelle“. Metz, 2005. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/2005/Ouzizi.Latifa.SMZ0501.pdf.
Der volle Inhalt der QuelleProduction planning using co-decision and negotiation whitin a virtual enterprise in this thesis, we are interested to a problem related to the evolution of the industrial production which is organized innetworks of enterprises coordinating their activities to produce the same finished product. After a detailed bibliographical study on modelling, coordination and planning within supply chains in general and on thevittual enterprise (VE) in particular, we centred our research task on collaborated and coordinated production's modellingand planning of a virtual enterprise. Our work consists in proposing on the one hand an architecture of the virtual enterprise by level and, on the other hand, models of planning which make it possible to ensure a plan of feasible and quasi optimal production planning according to the architecture suggested. This is carried out initially by coordinating enterprise's plannings of the same level, then by coordinating plannings of each level with those of upstream and downstream levels. To achieve our goal, we proposed a whole of definitions of data which we used and which we consider necessary for a quasi complete modelling of planning processes within the virtual enterprise. The definition of forecasts and contracts with outside make it possible to know the extemal environment of the VE. In the same way, definitions of ceulated curves, contracts and models of cost used by the partners make it possible to know the internal environment with the VE as well as the retained objectives for a virtual enterprise. To describe a global planning process of the VE in a progressive way, we start with the description of a node of the VE by specifying its various planning problems and proposing optimization models to minimize the production costs. Then, we studied problems of planning on a level by describing and modelling coordination between nodes of the same level. At the end, we describe the iterative process of supply chain planning. In order to assure coordination within the virtual enterprise, we use negotiation and mediation. Negotiation permits to partners to wide the field of planning. While mediation permits, using constraints relaxation, to solve conflicts in the event of no convergence of negotiations. Highlight distributed and centralized models of planning, we used the multi-agents approach. After a description of the different agents constiiuting our architecture and their tûnctionalities, we describe the various behaviours, data and messages used by the agents to ensure communications between them
Robert, Anna. „Optimisation des batches de production“. Paris 6, 2007. http://www.theses.fr/2007PA066657.
Der volle Inhalt der QuelleAgung, Adnyana Putera Igusti. „Génération et évaluation des activités de construction des bâtiments : optimisation de la planification par les algorithmes génétiques“. Chambéry, 2002. http://www.theses.fr/2002CHAMS004.
Der volle Inhalt der QuelleLandry, Jean-François. „Planification optimale discrète et continue : un joueur de billard autonome optimisé“. Thèse, Université de Sherbrooke, 2012. http://hdl.handle.net/11143/6681.
Der volle Inhalt der QuelleSt-Hilaire, Jason. „Planification multimodale et optimisation de la dose pour la radiothérapie externe du cancer du poumon“. Thesis, Université Laval, 2013. http://www.theses.ulaval.ca/2013/29478/29478.pdf.
Der volle Inhalt der QuelleAguilera, Luiz Manoel. „Ordonnancement de production avec coûts de changements dépendant de la séquence“. Grenoble INPG, 1993. http://www.theses.fr/1993INPG0183.
Der volle Inhalt der QuelleBen, Hamouda Zied. „Conception et optimisation robuste des réseaux de télécommunications“. Toulouse 3, 2010. http://thesesups.ups-tlse.fr/1193/.
Der volle Inhalt der QuelleWith communication networks getting more and more present in our daily activities, network outages or even significant degradations of the quality of service become less and less tolerable. This calls for a robust design of communication networks anticipating possible failures or shifts in the expected traffic demands. This thesis addresses several robust design and planning problems arising in the telecommunication area. We first address the problem of designing and dimensioning a survivable network topology. We propose a novel network design model integrating all equipment costs and constraints and including several operational constraints (potential nodes, modular capacities, delay constraints). One exact and two heuristic algorithms are proposed to solve this problem. Numerical results show that significant cost-savings can be achieved when equipment costs are taken into account in the early stages of the design process. The variation in traffic volumes has become one of the most important problems faced by network operators. Designing a network using a single ``busy hour'' traffic matrix more and more strains credibility due to the high volatility of traffic patterns. Thus, there is a need to incorporate demand uncertainty into the network routing problems explicitly. We study two robust route optimization problems: (1) the problem of VPN design under the hose model of demand uncertainty and (2) the problem of link weight optimization under demand uncertainty. We establish mathematical models for both problems and propose efficient approximation algorithms based on local-search techniques to solve them
Taix, Michel. „Contribution à la planification de mouvements en robotique“. Habilitation à diriger des recherches, Université Paul Sabatier - Toulouse III, 2011. http://tel.archives-ouvertes.fr/tel-00644801.
Der volle Inhalt der QuelleTeichteil, Florent. „Approche symbolique et heuristique de la planification en environnement incertain : optimisation d'une stratégie de déplacement et de prise d'information“. Toulouse, ENSAE, 2005. http://www.theses.fr/2005ESAE0028.
Der volle Inhalt der QuelleSoulignac, Michaël. „Planification de trajectoire en présence de courants : application aux missions de drones“. Nice, 2009. http://www.theses.fr/2009NICE4006.
Der volle Inhalt der QuelleRecent advances made in the fiel of autonomous vehicles suggest that, in a near future, Unmanned Air Vehicles (UAVs) will be more and more deployed in order to achieve various missions (such as surveillance, intelligence or search and rescue). Moreover, since UAVs may be slow, the impact of current is significant and cannot be neglected. That is why we introduce in the proposed thesis two new trajectory planning algorithms in presence of currents, which are extensions of wavefront expansion techniques. The first one, called sliding wavefront expansion, allows to handle strong currents, i. E. Currents which are faster than the UAV. We show that this approach is much more reliable than the existing one, which can return, in this particular context, physically infeasible paths. The second one, called symbolic wavefront expansion, allows to handle time-varying currents. Given some weather forecast (through current charts), this approach determine both the departure time and the trajectory minimizing the UAV’s travel time
Lucas, Rémi. „Planification adaptative des ressources ferroviaires“. Electronic Thesis or Diss., Institut polytechnique de Paris, 2020. https://theses.hal.science/tel-03009036.
Der volle Inhalt der QuelleRailway planning consists of drawing up a transportation plan before operational time, specifying a planning for each resource: the train paths, which correspond to the schedules, the rolling stock that will be used to move the trains, and the crew on board the trains. Given the complexity of the railway system, this transportation plan is carried out potentially several years in advance, when a precise transportation plan is drawn up.However, once a resource has been planned, it is sometimes necessary to adapt the transportation plan and therefore change it. There may be many reasons for this: schedule changes due to work, partially damaged infrastructure, request for an additional train set for a train, damage to a type of rolling stock, etc. Thus, the transportation plan may sometimes be adapted several times between its design, potentially several years in advance, and its execution on the day of traffic. It is therefore legitimate to ask whether the design of a precise transport plan with such large time scales is reasonable.In this thesis, we consider the adding of flexibility to the planning process so that the effort to adapt the transportation plan when necessary is reduced. We introduce the notion of transportation plan adaptation costs, and we propose to make these adaptation costs explicit for the rolling stock resource. In particular, we specify the structural adaptation costs, which make it possible to quantify the similarities between two different rolling stock plannings. Adaptive planning consists in anticipating possible future adaptations of the transport plan as early as the design phase. Several Integer Linear Programs are introduced and experimental results are proposed on real SNCF instances. The adaptive planning approach can be compared with the current approach, and it is shown that the adaptation costs can be effectively reduced by adopting this new way of planning