Dissertations / Theses on the topic 'Interconnexion des réseaux logistiques'
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Sarraj, Rochdi. "Interconnexion des réseaux logistiques : éléments de définition et potentiel." Phd thesis, Ecole Nationale Supérieure des Mines de Paris, 2013. http://pastel.archives-ouvertes.fr/pastel-00871048.
Full textYang, Yanyan. "Towards more efficient and resilient supply chain management through interconnection of logistics networks." Thesis, Paris Sciences et Lettres (ComUE), 2016. http://www.theses.fr/2016PSLEM036/document.
Full textIrrespective of significant performance achieved, today’s logistics networks are overwhelmingly dedicated to an actor and therefore poorly interconnected. This fragmentation exhibits inevitable inefficiency and needs to be changed in respond to today’s new arising challenges in efficiency and resilience. To solve this antagonism, an innovative concept - Physical Internet (PI) - has been proposed which is a fully interconnected, open, dynamic logistics system. In such a system, the facilities and means of transportation can be dynamically organized and allocated in the short-term or long-term according to the economic environment. As a result, decisions can be made dynamically, agilely, and thus optimally. This thesis studies the perspectives of the PI to inventory management and transportation regarding the challenges in efficiency and resilience.As the efficiency of the PI to transportation has been carried out in literature, the first objective of this thesis is to explore the potentials of the PI to inventory management. To this end, we firstly qualitatively examine the new practices brought by the PI and conclude three main characteristics: 1) Distributed stocks near end customers; 2) Transshipment of inventories; and 3) multiple dynamic source options. Corresponding inventory models and solutions are proposed and evaluated with numerical experiments in Fast Moving Consumer Goods (FMCG). This part of study gives a guideline for the vendors applying the PI to make inventory decisions in such an open logistic system.The second objective is to analyze the resilience of the proposed PI enabled inventory and transportation model confronted to disruptions. The proposed inventory and transportation model are extended with different disruptions at facilities including plants and hubs. Different disruption strategies are developed. Numerical studies in FMCG are carried out.In a word, this research investigates the inventory management in the PI and the resilience of PI enabled logistics models. It is the first time such a work is done and it should be upfront. From the results of studies, there is no doubt that the PI changes today’s supply chains design and improve the performance of supply chain management both in efficiency, effectiveness and resilience
Wu, Ming. "Interconnexion des réseaux locaux." Rennes 1, 1986. http://www.theses.fr/1986REN10025.
Full textYounsi, Marwen. "Protection collaborative des réseaux logistiques." Master's thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/26649.
Full textSaba, Ghassan. "Protocoles multipoint et interconnexion de réseaux FIP." Vandoeuvre-les-Nancy, INPL, 1996. http://docnum.univ-lorraine.fr/public/INPL_T_1996_SABA_G.pdf.
Full textThanh, Phuong Nga. "Conception et planification stratégique des réseaux logistiques complexes." Nantes, 2008. http://www.theses.fr/2008NANT2067.
Full textIn a context of strong competition, many companies will seok to improve the performance of their supply chain. Changes are necessary when the supply chain becomes obsolete or in case of signicative changes like mergers, outsourcing or substantial variations of the demand. This research aims at modelling and solving a supply chain design and planning problem over a strategic horizon with some operations research algorithms. The main decision variables concern the facilities that may be opened, expanded or closed, as well as capacity planning and the management of material flow along the supply chain. The objective is to minimise the total logistic cost while satisfying the demand. Additional options include, among others, the possibility to subcontract a part of the production, the possibility to increase the capacity of some facilities. The problem is modeled by a mixed-integer linear program where the integer variables are binary. Three resolution methods are developed. The first is a heuristic based on linear relaxation and some rounding procedures. An improved version of this method is developed by replacing the linear relaxation with the Difference of Convex Functions (D. C. ) approach. The last method is a decomposition method based on Lagrangean relaxation. The results of these methods are compared with the ones obtained with the solver Xpress-MP
Bricha, Naji. "Protection optimale des réseaux logistiques contre des attaques." Doctoral thesis, Université Laval, 2014. http://hdl.handle.net/20.500.11794/25427.
Full textThe evolution of logistic networks is accompanied by the worrisome risk of intentional attacks and these networks increasingly become potential targets. It is essential to protect them against these attacks. This thesis develops a method for the optimal allocation of defensive resources among the entities’ logistic networks to protect against intentional attacks in the context of facility location optimization. This method is developed to calculate the expected damage, evaluate the value of a critical target and optimally distribute the limited defensive resources, taking the attacker’s strategy into account. Three cases of logistics networks are studied in this thesis. We first of all consider the context of the uncapacitated fixed-charge location where a strategy of optimal protection is selected. Then, extra-capacity is used as a means for indirect protection, allowing the reduction of the expected damage. Lastly, as the efficiency and effectiveness in any logistics network is largely determined by the correct operation of the warehouses, the latter are also protected in the same way as the plants. Whereas the defender’s objective is to minimize the damage, the attacker seeks to maximize this damage. In the three cases considered the problem formulation as a two-period game where the defender invests in the first period. This means that the defender selects a strategy in the first period that minimizes the maximum loss the attacker may cause in the second period. A method is developed to evaluate the utilities of the players. This method evaluates many expected costs, including the cost needed to restore disabled facilities, the backorder cost, and the cost incurred because of the change in transportation costs after attacks. An algorithm is developed to find the equilibrium solution and the optimal defence strategy. Our method is compared to other suggested strategies. Obtained results clearly indicate the effectiveness of our model and the indirect protection by extra-capacity deployment, as well as the importance of protecting the warehouses.
Tricoire, Benoît. "Optimisation dans les réseaux logistiques : du "terrain" à la prospective." Angers, 2013. http://www.theses.fr/2013ANGE0019.
Full textThe work carried out during this PhD thesis address three optimization issues that have been encountered by Optilogistic, a software company specialized in transport optimization. First, in a prospective approach, we consider a load plan design problem faced by express shipment companies. Then, we study a real world problem encountered by a french retail company. Lastly, our attention has been drawn to the computation of time-dependant shortest paths related to road networks submitted to traffic congestions
Moke, Nlandu Jean. "Prototype d'un système de conception dynamique de réseaux manufacturiers et logistiques." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0015/MQ49039.pdf.
Full textCarle, Marc-André. "La métaheuristique CAT pour le design de réseaux logistiques déterministes et stochastiques." Thesis, Université Laval, 2012. http://www.theses.ulaval.ca/2012/29637/29637.pdf.
Full textDiarrassouba, Ibrahima. "Survivable Network Design Problems with High Connectivity Requirement." Clermont-Ferrand 2, 2009. http://www.theses.fr/2009CLF21989.
Full textBerrada, Karima. "Extension de réseaux d'interconnexion." Paris 11, 1986. http://www.theses.fr/1986PA112216.
Full textThis thesis deals with problems in interconnexion networks, which can be either multiprocessor networks or telecommunication networks. In particular we study how these networks can be extended without increasing the diameter. We give some results on the extension of known good networks, and propose some other ones, having good extensibility properties
Syska, Michel. "Communication dans les architectures à mémoire distribuée." Nice, 1992. http://www.theses.fr/1992NICE4562.
Full textHsu, Tiente. "Proposition d'une architecture de réseau d'interconnexion à reconfiguration dynamique et asynchrone." Lille 1, 1993. http://www.theses.fr/1993LIL10052.
Full textCuesta, Fernand. "Synthèse des ressources de communication pour la conception de systèmes embarqués temps réel flots de données." Nice, 2001. http://www.theses.fr/2001NICE5659.
Full textBréholée, Benoît. "Interconnexion de simulations distribuées HLA." École nationale supérieure de l'aéronautique et de l'espace (Toulouse ; 1972-2007), 2005. http://www.theses.fr/2005ESAE0003.
Full textKtari, Salma. "Interconnexion et routage dans les systèmes pair à pair." Phd thesis, Télécom ParisTech, 2009. http://pastel.archives-ouvertes.fr/pastel-00005737.
Full textEssaid, Mohand. "Modélisation et simulation de la connectivité des flux logistiques dans les réseaux manufacturiers." Phd thesis, Ecole Nationale Supérieure des Mines de Saint-Etienne, 2008. http://tel.archives-ouvertes.fr/tel-00783593.
Full textKande, Sona. "Etude et résolution de problèmes de planification dans des réseaux logistiques multi-échelons." Thesis, Troyes, 2015. http://www.theses.fr/2015TROY0015/document.
Full textThis work presents a planning problem in a distribution network incorporating two levels inventory management of perishable products, lot-sizing, multi-sourcing and transport capacity with a homogeneous fleet of vehicles. A mixed integer linear programming (MILP) a greedy heuristic and a reactive randomized heuristic are developed to solve this real planning problem. There are some instances for which the solver CPLEX cannot give a good upper bound within the limited time and for other instances it takes a lot of time to solve MILP. The heuristics are alternatives to the mixed integer linear program to quickly solve some large instances taking into account original and difficult constraints. For some instances the gap between the solutions of the solver (MILP) and the heuristics becomes quite significant. The variable neighborhood descent (VND), the iterated local search (ILS) and the multi-start iterated local search (MS-ILS) are implemented. These methods are included in an APS (Advanced Planning System) and compared with a MILP solver. The instances are derived from actual data or built using a random generator of instances to have wider diversity for computational evaluation. A lagrangian relaxation is developed to compare the solutions of the instances, for which CPLEX cannot give a good upper bound within the limited time, with the other methods (greedy heuristic, VND, ILS and MS-ILS). A lagrangian heuristic is proposed; the solution of lagrangian relaxation is used to build a feasible solution with a repair heuristic
Mekaouche, Lynda. "Pilotage holonique auto-organisé de réseaux logistiques : validation par modélisation et simulation distribuée." Aix-Marseille 3, 2007. http://www.theses.fr/2007AIX30011.
Full textThe objective of this work is to improve decision making structures for product flow control of a supply network through Customer-Supplier Relationship (CSR) dynamics. The proposed decision making system relies on three complementary axes : - Self Organized holonic approach of decision making, obtained through the emergence of the best solution (i. E. , the best response to a call for proposals). This approach was described by using the PROSA reference architecture which allows specifying holonic approaches according to a breakdown into holons of several types (i. E. , Product, Resource, Order and Staff). The proposed approach is based on the association of an Autonomous Control Entity (ACE) to each partner of the network, allowing performance self-evaluation with respect to calls for proposals. - Performance evaluation through a multicriteria analysis based on the Analytic Hierarchy Process (AHP) method. - Coherence checking of the global solution and validation of the decision approach with distributed modelling and simulation. For that, each ACE was modelled according to the Discrete EVent system Specification (DEVS) formalism and was integrated into a High Level Architecture (HLA) distributed simulation environment. The simulation was used to illustrate the internal behaviour of an ACE and its interactions with other ACEs (illustration of the self-organization) as well as to highlight the advantages of the proposed approach
Yang, Zhen. "Etude de problèmes de localisation de sites dans la conception des réseaux logistiques." Troyes, 2009. http://www.theses.fr/2009TROY0036.
Full textFacility location is a strategic decision for supply chain management. In this thesis, we study several basic realistic facility location problems, which include a new variant of capacitated clustering problem (VCCP), facility location problem with single-sourcing (SSCFLP), with vehicle routing (CLRP) and with two stages (TSCFLP). We develop effective methods for finding high quality solutions and tight lower bounds for these problems by improving and extending existing cutting plane methods and applying cut-and-solve (CS) approach and La-grangian relaxation (LR) method. For the VCCP, a LR method coupled with effective multipliers updating techniques, is developed to find its high quality near optimal solution. For the SSCFLP and the TSCFLP, a CS approach combined with cutting plane methods and partial integrality strategy is proposed to their exact resolution. For the CLRP, a new model is proposed. New valid inequalities are identified to strengthen the linear relaxation of the model. A cutting plane method and a partial branch-and-cut approach are developed to find tight lower bounds of the problem. Numerical results show that our algorithms can: 1) produce a high quality near optimal solution for randomly generated instances of the VCCP with average duality gap 0. 51% and 2% in the worst case. 2) find optimal solutions for all benchmark instances of SSCFLP in a few seconds. 3) find optimal solutions for 50 bench-mark instances of TSCFLP for the first time. 4) reduce the optimality gap by 1. 2% on average for the CLRP
Thomas, Catherine. "Réseaux hexagonaux : modélisation géométrique et application à la téléphonie mobile." Amiens, 2006. http://www.theses.fr/2006AMIE0615.
Full textGrida, Ben Yahia Imen. "Mécanisme de gestion basé sur les principes de l'informatique autonome pour les services de la nouvelle génération." Evry, Institut national des télécommunications, 2008. http://www.theses.fr/2008TELE0012.
Full textGrepet, Cyril. "Méthodologie pour la validation de protocoles de routage Ad hoc." Evry, Institut national des télécommunications, 2007. http://www.theses.fr/2007TELE0001.
Full textNew kind of networks has emerged recently among them Ah hoc networks which are spontaneous, infrastrucreless networks composed of mobile communicating with each on a multihop basis. Wireless mobile networks leads to specific and routing challenges. Indeed, wired routing protocols are not efficient for mobility. Many specific protocols have been proposed for mobile Ah hoc networks. We can spread them into three classes : reactive,( on-demand routing), proactive and hybrid protocols which combiend the former ones. For these protocols, the mobility of nodes and the rasio medium imply new constraints for conformance testing. Conformance testing aims to ensure that an implementation has the correct behavior with respect to its formal specification. Most of its problems when tesing the conformity of an Ad hoc routing protocol aree due to the mobility of nodes. We proposed a framework for conformance and interoperability testing. Our framewrk relies on fitted testing architectures, realistic test assumptions, specification topology reduction method based on nodes self-similarity. We considered DSR , a reactive protocol, as case study. We noted an important number of inconclusive verdicts due to mobility when applying our testing methodology
François, Julien. "Planification des chaînes logistiques : modélisation du système décisionnel et performance." Bordeaux 1, 2007. http://www.theses.fr/2007BOR13521.
Full textSupply chain global management must be consistent with partners’ local management policies. The purpose of this thesis is to analyse the performance of supply chains with various management architectures compounding, in different levels, hierarchical and distributed approaches. These architectures are analyzed comparatively, using a generic planning model involving production, storage and transport constraints in distributed organisations. The specific problem of production capacity sharing of a partner working for several supply chains is also studied
Bruniaux, Romain. "Simulation continue de réseaux de sites industriels : application aux chaînes logistiques dans le secteur automobile." Clermont-Ferrand 2, 2000. http://www.theses.fr/2000CLF22226.
Full textComa, Céline. "Interopérabilité et cohérence de politiques de sécurité pour les réseaux auto-organisants." Télécom Bretagne, 2009. http://www.theses.fr/2009TELB0097.
Full textKoné, Ousmane. "Interconnexion de systèmes ouverts : test d'interopérabilité, test avec contraintes de temps physique." Bordeaux 1, 1994. http://www.theses.fr/1994BOR10514.
Full textFaure, Cécile. "Interconnexion de réseaux informatiques et réseau numérique à intégration de services : modélisation et vérification d'architectures de communication." Toulouse 3, 1990. http://www.theses.fr/1990TOU30157.
Full textDailly, Nicolas. "Optimisation des réseaux d'accès mobiles pour les systèmes EGPRS et B3G." Paris, ENST, 2007. http://www.theses.fr/2007ENST0008.
Full textThis thesis studies several problems to improve the quality of service offered to subscribers and to set up handover mechanisms. The first part deals with dynamic resources allocation mechanisms for the Abis interface. These mechanisms must allow the deployment of the E-GPRS technology, while preserving the existing Abis structure. The second part analyzes various handover approaches which can be set up to allow user mobility in the E-GPRS networks. We introduce several proposals to improve reselection performances and to set up a real handover. We details recent evolutions of the standardization, then we expose our results which allow to compare performances of the various studied mechanisms. The third part deals with inter-systems handovers. We analyze the terminal transfer from an E-GPRS base station to a WIFI access point integrated to the mobile access network. We also study the performances of several handover mechanisms which can be used in case of streaming traffic. Our results show the benefits offered by the introduction of a convergence layer at LLC level. The fourth part studies compression mechanisms which can be set up to reduce the size of SIP signalization messages. The aim of this study is to reduce the signalization transmission delays - through low data rate bearers - and to reduce the use of radio resources
Doğan, Pınar. "Essays on interconnection." Toulouse 1, 2001. http://www.theses.fr/2001TOU10094.
Full textThe central theme to this dissertation is economics of interconnection in physical networks. The first three chapters are devoted to the telecommunications industry: principal regulatory problems, entrants' incentives to adopt new technologies when they have an unbundles access to the local loop, in Chapter 2 and 3. Chapter 4 focuses the Internet industry: competition is modeled
Nicolle, Christophe. "Traduction multi-modèles dans les systèmes d'information coopératifs." Dijon, 1996. http://www.theses.fr/1996DIJOS004.
Full textIdel, Mahjoub Yassine. "Etude des systèmes de transport public et réseaux logistiques par les réseaux de Petri colorés et l'algèbre (max, +) : modélisation, évaluation de performances et optimisation." Electronic Thesis or Diss., Amiens, 2019. http://www.theses.fr/2019AMIE0055.
Full textThe present work focuses on optimal management, resource sharing and conflicts resolution in Discrete Event Systems (DES). We mainly focus on public transportation systems and supply chains. The main objective of this work is to develop a generic approach to represent the functioning of a DES in a real and dynamic context, with fewer simplifying assumptions. More precisely, we aim to develop theoretical models, describing the behavior of the real system characterized by different phenomena including conflicts and resource sharing. In order to solve these phenomena, we develop algorithms and routing policies to arbitrate conflicts and thus determine and control the different states of the system. To this end, we propose a new modelling approach combining colored Petri nets and (max, +) algebra. The obtained models make it possible to study and evaluate the behavior of the system and therefore prove its performance properties. As a second contribution, and in order to improve the performance of the system, a control approach based on residuation theory in dioid algebra is developed. The purpose of this control is to ensure a certain performance both for users, in terms of waiting times and travel times, and for companies in terms of the number of transportation means to deploy in the network (vehicles, etc.) in order to minimize their costs. The developed models are generic and can be applied to any public transportation network (bus network, rail network, multimodal network, etc.) of any size. Similarly, these models are adapted to supply chain networks in order to minimize storage and transport times for goods in different warehouses and distribution hubs. Illustrative examples are given to show the applicability of the proposed approach and the obtained results are promising. These examples enables the verification and the validation of the developed models through concrete scenarios. Finally, a simulation tool, based on established models and programmed with python, is developed. This tool is used to study, analyze and control DES, particularly public transportation systems and supply chains
Bchini, Tarek. "Gestion de la Mobilité, de la Qualité de Service et Interconnexion de Réseaux Mobiles de Nouvelle Génération." Thesis, Toulouse, INPT, 2010. http://www.theses.fr/2010INPT0016/document.
Full textWith the rapid evolution of mobile radio telecommunications and networks technologies, researchers are currently preparing the arrival of a new generation called 4G. The 4th generation network aims to improve spectral efficiency and increase capacity to manage a large number of mobiles in a cell. It tries to provide high flow rates under high or low mobility. It also aims to enable and facilitate the interconnection and the interoperability between different technologies allowing transparent transition between networks. Finally, it aims to avoid interruption of services during the handover, and to switch an all-IP system. In this context, we are concerned first with QoS and mobility issues in Mobile WiMAX for the real-time traffic. We compared the performance of several mobility protocols in the context of the level 2 and level 3+ handovers. Several mobility models, configurations and scenarios were considered. Finally, we modeled a decision algorithm that manages the handover in mobile WiMAX based on several input parameters.Through these studies, we have identified mobility protocols that provide an acceptable QoS level for real-time traffic under the proposed scenarios. Secondly, we focused on the problems of interconnection and interoperability between networks, taking into account the mobility and vertical handovers between two technologies. For this, we proposed to compare mobility protocols or combine them to reduce delays for real-time traffic during the handover. We also proposed interconnection models between mobile WiMAX and many other standards (802.11e, UMTS, DVB-S/RCS, LTE). Besides interconnection solutions, we also highlighted the combination or combinations of management mobility protocols that can guarantee QoS
Mederreg, Amal Wafa. "Méthodologie de test pour les services et protocoles des réseaux mobiles." Evry, Institut national des télécommunications, 2004. http://www.theses.fr/2004TELE0007.
Full textThe domains of telecommunications and computing were marked these last years by major evolutions, in particular, with Internet and the mobile networks. These evolutions gave rise to the idea of a convergence between the Internet and the mobile networks, with the goal of providing more services and functionalities to the users. To reach this convergence, it was necessary ti think for new protocols and equpements. These elements (protocols, equipments, services. . . ) may be developed by different designers and this may complicate sometimes these elements correct work. Thus , before bringing them into the network, it is important to make them go through several steps of production. Among these steps appears the test step. The test step is provided in order to detect errors in the system, to correct them and to guarantee the correct operation of these elements. In the test phase, the system goes through several stages which we gather under the denomination of methodology of test. This methodology can be different according to the different test types we want to carry out. Moreover, it is important to automate these steps in order to reduce the time and the development cost an, mainly, to increase the reliability of the proposed products. In this thesis, we present two test methodologies for the mobile telecommunications domain : the services conformity test and the interoperability test. These two methodologies cover in an automatic way all the test production steps (from the systemunder test specification to the execution on a real platform)
Boraud, Martine. "Safir : un système d'aide à la formation interactive aux réseaux." Lyon, INSA, 1985. http://www.theses.fr/1985ISAL0060.
Full textNahas, Michel. "Réseaux coopératifs asynchrones : analyse de performances et conception de codes." Paris, Télécom ParisTech, 2010. http://www.theses.fr/2010ENST0073.
Full textRecently, cooperation was proposed as an alternative technique of multiple antennas (MIMO) systems, in order to provide high spectral efficiency and spatial diversity to improve the link reliability. The main idea is that multiple nodes, in a network, cooperate together to form a virtual antenna array. Cooperation permits, like the MIMO, to exploit space-time or cooperative diversity. This new configuration can result in an asynchronism due to the difference in local oscillators and the different propagation and processing delays. In the first part of the thesis, the effect of asynchronism on cooperative networks is studied by asymptotic approximation of the outage probability at high Signal to Noise Ratio. The performances of networks with two cooperative transmitters or two relays are evaluated. It is shown that when no relative delay exists between cooperative nodes sending the same information, the diversity order of the network is equal to one, but with the presence of a delay, full transmit diversity is obtained. In the second part, appropriate Space Time Block Codes are investigated for asynchronous cooperative networks. A general construction method based on optimal synchronous codes is designed to build delay tolerant codes for an arbitrary number of cooperative nodes and for bounded delay profiles. This design method consists of changing the order of the symbols to send by concatenation and permutation of several code matrices. Moreover, low complexity decoding methods, providing good performances, are proposed
Feng, Ming Gang. "Une plate-forme distribuée basée sur les services de communication." Versailles-St Quentin en Yvelines, 1996. http://www.theses.fr/1996VERSA002.
Full textMenouar, Hamid. "Prédiction de mouvement pour le routage et le contrôle d'accès au canal dans des réseaux ad hoc véhiculaires." Paris, ENST, 2008. http://www.theses.fr/2008ENST0002.
Full textVehicular Ad-hoc Networks (VANETs) represent a rapidly emerging, particularly challenging class of Mobile Ad-hoc Networks (MANETs). VANETs are distributed, self-organizing communication networks built up from traveling vehicles, and are thus characterized by very high speed and limited degrees of freedom in nodes movement patterns. This makes the network topology changes very frequently and very rapidly, therefore more unstable when compared to MANETs, and existing protocols initially proposed for MANETs, mainly at the NET and the MAC layers, are not suitable for VANETs as they are. The vehicles' movement information assumes an important parameter which should be considered when designing any protocol for VANETs. In this work, we propose a concept which exploits the movement information of involved vehicles to predict the future status of the network topology. We call this concept MOPR (MOvement PRediction). Based on the prediction of the network topology evolution, the MOPRcross-layer architecture introduces a new metric called Link Stability (LS) metric to each communication link. This metric is then used at the NET layer to help the routing protocol in selecting the most stable routes, and at the MAC layer to help the MAC protocol to guarantee a better control between nodes when accessing the medium. Based on extensive simulations, we show the network performances improvements that MOPR can bring, mainly in case of highly dynamic networks. We present as well a preliminary prototype of MOPR. This prototype, even if still at an early stage, gives already an idea on the problems we may meet in implementing MOPR for realistic environments which will help us to improve our proposals
Elmahi, Ilham. "Modélisation et commande des systèmes de chaînes logistiques par les réseaux de Petri et l'algèbre des dioïdes." Besançon, 2006. http://www.theses.fr/2006BESA2008.
Full textIn the supply chains domain, competitiveness by the deadlines and the quality of the services became an essential factor for the survival of the companies. The problems of the organization and the improvement of the supply chain have caused, for several years, a growing number of research tasks. We are interested in this work to study the supply chain systems using the recently called, the discrete events system theory. This thesis work relates to the modelling, the control and the optimization of the supply chain systems that are max-plus-linear. The timed event graphs (TEG) -a subclass of Petri nets where are synchronization phenomena only- are typical examples of such systems. The purpose is to propose an analysis and control approach, within a just-in-time context, for the production and the transport in a supply chain. A TEG and (max,+) algebra based model is proposed and the performance evaluations in term of delivery dates and in-process storage times are performed. The proposed model is then enriched by a new type of transitions in order to take into account the characteristics of the studied system. Indeed, more adapted modelling leads us to distinguish, at least, two different operating modes in the transport phase of the supply chain. Thus, we integrate, in the initial model, varying constraints in order to model the operating mode of loading or the operating mode of shipment, each one during its corresponding time interval. The obtained model is then applied in order to determine the optimal control of a supply chain system knowing the desired output for this system. For this purpose, taking into account the introduced constraints, we compute the optimal input dates to make the deliveries, at the latest, on their due dates. This led us to consider the problem of minimization of the storage durations and to raise the costs optimization problem within supply chains. Hence, we propose a model predictive control (MPC) based approach in which the computation of the input dates of the model is performed while minimizing a predefined cost criterion
Gouya, Anahita. "Gestion des interactions de service dans la sous-couche de contrôle de service des réseaux de nouvelle génération : ims." Evry, Institut national des télécommunications, 2008. http://www.theses.fr/2008TELE0004.
Full textIn the Next Generation Networks the control plane and the service plane are entirely separated. This separation ensures the autonomy of each plane and enables their independent development and deployment. The specification of the IP Multimedia Subsystem (IMS), as a unique service control overlay over the heterogeneous networks, eases the interaction between these planes. However, this interaction becomes challenging when multiple services are invoked during a session. The goal of this thesis is to provide IMS, with mechanisms to manage the interactions between services. We addressed two problems in this field: the negative interactions that are due to the conflicts between services and the positive interactions that enable the composition of services. The service conflicts occur as services invoked during an IP session behave correctly when processed separately from each other, but not when running together. We defined a SIP-based algorithm and the associated mechanisms to enhance IMS service invocation. This algorithm is the core of the Service Broker, a new functional entity in charge of managing the service conflicts. We validated our proposal through a performance evaluation and prototyped the Service Broker on an open source IMS platform. By means of service composition all kinds of service inter-working scenarios, independently of the underlying control functionalities, can be achieved. We defined a SIP-based service composition management algorithm, over the Service Capability Interaction Manager (SCIM) of IMS. This algorithm enables the interoperability and cooperation between different services and allows enriching and personalizing the services based on the user needs and preferences. We presented the application of our proposition in different use cases and validated it through the analytical studies
Francois, Julien. "Planification des chaînes logistiques : modélisation du système décisionnel et performance." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2007. http://tel.archives-ouvertes.fr/tel-00267825.
Full textSaracci, Francesca. "L'interconnexion, objet du droit communautaire des télécommunications : exemple de régulation : application comparée France-Italie." Lyon 3, 2003. http://www.theses.fr/2003LYO33014.
Full textJavaid, Usman. "Routage et gestion de la mobilité dans les réseaux personnels." Bordeaux 1, 2008. http://www.theses.fr/2008BOR13570.
Full textThe aim of this thesis is to investigate methods and strategies for efficient routing and mobility management in personal environments. The concept of Personal Ubiquitous Environments (PUE) is introduced which accommodates heterogeneous devices and access networks of different users and sustain the notion of sharing resources in a distributed manner. A prerequisite for achieving the resource (devices, networks) sharing in personal environments is the deployment of suitable communication protocols which establish efficient multi-hop routes betweens the devices of the PUE. Personal Network Routing Protocol (PNRP) has been developed to perform policy-based routing in personal environments. Moreover, in certain personal networking scenarios, the infrastructure network components (i. E. Gateways) are more than one-hop distance from the user's devices; Adaptive Distributed gateway Discovery (ADD) protocol is thereby proposed to efficiently discover the multi-hop routes towards the gateway in a totally distributed manner. All the more, since the personal environments regroups heterogeneous access networks, an efficient mobility management architecture is proposed which offers unified location management and seamless handover experience to dynamic personal nodes. The proposed protocols are assessed by means of numerous communication scenarios; the simulation results demonstrate the applicability of the proposed protocols
Diarrassouba, Ibrahima. "Survivale Network Design Problems with High Connectivity Requirement." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2009. http://tel.archives-ouvertes.fr/tel-00724580.
Full textFlochel, Laurent. "Économie des réseaux : l'impact de différentes formes de libéralisation sur les comportements et structures de marché." Paris 1, 1997. http://www.theses.fr/1997PA010089.
Full textThis thesis deals with network industries liberalization and is divided in three parts. The first chapter proposes a survey on the evolution of network industries organisation of and regulatory tools. The second chapter is a survey on final services tarification, access charges and discusses the optimal regulatory policy. The second part of the thesis deals with access conditions to an essential facility. Chapters 3 and 4 show that the historic operator is not always incited to forclose a potential competitor by using access tariffs conditions (access charges) to the essential facility. Chapter 5 compares two regulatory regimes when the incumbent has a non tariff barrier to entry, which is represented in our case by the quality of the essential facility. The third part deals with competition of interconnected and different qualities networks between operators possessing their own network. Consumers are supposed to valuate the network quality, the calls they send and the calls they receive. In this framework, operators are unilateraly incited to impose low access charges to their own network. This effect is amplified when price discrimination between on-net and off-net calls is autorised. Moreover, the imposition of a reciprocity principle reinforces this effect
Villa, Monteiro Daniel. "Stratégies d'alliances dans la satisfaction bout en bout de la QoS au sein d'un réseau inter-domaines hiérarchique et égoïste." Versailles-St Quentin en Yvelines, 2011. http://www.theses.fr/2011VERS0007.
Full textThis thesis focuses on satisfying the QoS end to end in a inter-domain hierarchical network and selfish. Routing protocols only offer a single road between two domains (direct route), whose composition is mainly influenced by economic interests. Our main contribution has consisted in proposing a new model based on the concept of alliance. In this model, an alliance is a set of independent areas of an economic perspective that decide to share part of their information network and a particular routing service (service stop). The goal of this alliance is to improve customer service requests among the members area by using alternative routes to better direct routes respecting QoS constraints. We establish a first-time mechanisms for the construction of these alternative routes and how to obtain the necessary estimates. Subsequently, our work focuses on studying the characteristics defining an effective alliance. We propose, then, different possible compositions of alliance based on local characteristics of areas but also on their topological position. To validate our model and study the effectiveness of alliances, we have conducted numerous simulations on realistic topologies and hierarchical. We find that the effectiveness of an alliance depends of course on its size, its composition but also the nature and difficulty of QoS constraints to satisfy
Vila, Didier. "La modélisation mathématique des réseaux logistiques : procédés divergents et positionnement par anticipation. Application à l'industrie du bois d'œuvre." Phd thesis, Ecole Nationale Supérieure des Mines de Saint-Etienne, 2005. http://tel.archives-ouvertes.fr/tel-00778631.
Full textVila, Didier. "La modélisation mathématique des réseaux logistiques: procédés divergents et positionnement par anticipation. Applications à l'industrie du bois d'oeuvre." Thesis, Université Laval, 2006. http://www.theses.ulaval.ca/2006/23295/23295.pdf.
Full textStrategic decisions on the location, the capacity, the layout, and the mission of production and distribution facilities are key drivers of manufacturing company’s competitiveness. The aim of supply chain design models is to recommend economically efficient decisions to the company’s administrator. The realism of the mathematical modeling of the aforementioned issues conditions the validity and the applicability of the prescribed solutions. The elaboration of realistic methodologies is thus one of the main success factors of decision support processes. This thesis first proposes a generic methodology to design the production-distribution network of divergent process industry companies. The approach is validated by applying it to Virtu@l-Lumber, a virtual but realistic case from the lumber industry. Second, an approach that takes into account market opportunities when designing production-distribution networks is proposed and tested. This approach is based on a stochastic programming with recourse model. Lastly, a mathematical model combining the two previous formulations is proposed and its potential impact on the lumber industry is investigated with the Virtu@l-Lumber case.
Vila, Didier. "La modélisation mathématique des réseaux logistiques : procédés divergents et positionnement par anticipation : applications à l'industrie du bois d'œuvre." Doctoral thesis, Université Laval, 2006. http://hdl.handle.net/20.500.11794/18741.
Full textStrategic decisions on the location, the capacity, the layout, and the mission of production and distribution facilities are key drivers of manufacturing company’s competitiveness. The aim of supply chain design models is to recommend economically efficient decisions to the company’s administrator. The realism of the mathematical modeling of the aforementioned issues conditions the validity and the applicability of the prescribed solutions. The elaboration of realistic methodologies is thus one of the main success factors of decision support processes. This thesis first proposes a generic methodology to design the production-distribution network of divergent process industry companies. The approach is validated by applying it to Virtu@l-Lumber, a virtual but realistic case from the lumber industry. Second, an approach that takes into account market opportunities when designing production-distribution networks is proposed and tested. This approach is based on a stochastic programming with recourse model. Lastly, a mathematical model combining the two previous formulations is proposed and its potential impact on the lumber industry is investigated with the Virtu@l-Lumber case.