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Wang, Zhiping. "Constructive generative design methods for qualified additive manufacturing." Thesis, Ecole centrale de Nantes, 2021. https://tel.archives-ouvertes.fr/tel-03670417.
Additive manufacturing (AM) technologies give more and more design freedom to designers and engi-neers to design and define highly complex geometries and material compositions. Due to a layer-by-layer processing, the constraints, methods, tools and processes of design in AM are different from that in traditional manufacturing processes. Traditional design methods and tools cannot meet the needs of design in AM. Therefore, a new re-search field, design for AM (DfAM), has emerged to serve this need. However, existing DfAM methods are either guidelines or pure computation-based, which have limited consideration of coupled constraints along the AM digital processing chain and are difficult to ensure manufactura-bility of design in AM. To obtain qualified design in AM, this research focuses on three typical existing problems in DfAM domain: Firstly, how to ensure manufacturability in (topology optimization) TO process? Secondly, how to design support structures with lightweight, easy-to-remove for post-processing and friendly heat-diffusion properties to ensure shape accuracy and improve surface roughness of printed parts? Finally, how to avoid accuracy loss in print-ing preparation of complex lattice structures and ensure their manufacturability in design?To solve the three identified problems, this research developed a set of new constructive genera-tive design methods: 1. CSG-based generative design method to ensure manufacturability in light-weight topology optimization; 2. Pattern-based constructive generative design method to optimize support structure design and 3. Toolpath-based inversed constructive design to directly ob-tain processing models of corresponding complex lattice or porous structures with qualified print-ing toolpaths. The three proposed methods can well embed AM process constraints, realize para-metric control and save computation cost in design process to obtain a set of candidate design solutions with ensured manufacturability. A set of comparison studies with existing DfAM meth-ods and a couple of experiment case studies in medical applications demonstrated the methods’ advantages. These constructive methods may have large application potential to be adopted as design and decision making tools for other industrial applications when qualified DfAM is required
Perrissol, Philippe. "Conception d'antennes pour biocapteurs implantables." Thesis, Nice, 2015. http://www.theses.fr/2015NICE4118.
The improvement of the methods of cure and prevention of diseases has always constituted a major objective in our societies. The possibilities offered by modern technologies allow the multiplication of the number of medical applications but all these new practices have an impact on pre-clinical animal studies which require a large-scale health status follow-up. This work, which aims at modernizing the supervision of laboratory mice in an animal facility, is a collaborative project between the LEAT and TIRO-MATOs labs. The objective is the design of a system allowing to facilitate this follow-up for the researchers while leading to new research areas. Thus, we first studied the conception of an antenna working at 433MHz, connected to a mouse implanted temperature sensor, taking also into account the biological environment impact. After having characterized the obtained elements, the feasibility of a localization system has been studied. In order to identify several mice within a cage, the study has focused on using an UHF RFID (Radio Identification Frequency) standard (868 MHz). In this part, a reader antenna placed under the cage has been investigated. Different solutions have been proposed and compared thanks to the received power (RSSI level) recorded by the reader. For that purpose, mice “phantoms” have been specifically developed. The comparison of the different results obtained particularly with numerical mice “phantoms”, led to the conception of a reading diversity system composed of 4 antennas. This last system allows to detect the presence of up to four phantoms within a cage divided into four zones
Bogo, Gilles. "Conception d'applications pour systèmes transactionnels coopérants." Habilitation à diriger des recherches, Grenoble INPG, 1985. http://tel.archives-ouvertes.fr/tel-00315574.
Bogo, Gilles. "Conception d'applications pour systèmes transactionnels coopérants." S.l. : Université Grenoble 1, 2008. http://tel.archives-ouvertes.fr/tel-00315574.
Arnoud, Justine. "Conception organisationnelle : pour des interventions capacitantes." Phd thesis, Conservatoire national des arts et metiers - CNAM, 2013. http://tel.archives-ouvertes.fr/tel-00962450.
LE, TANOU YANN. "Methodologie pour la conception d'architectures logicielles." Nantes, 1998. http://www.theses.fr/1998NANT2057.
DEROBERT-MAZURE, JEAN-CHARLES. "Conception d'ecrans acoustiques pour structures immergees." Paris, ENSAM, 1992. http://www.theses.fr/1992ENAM0034.
Andreani, Anna. "Conception d’un dispositif de mesure de BSDF pour l’éco-conception de bâtiments." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSET003.
In a context of increasing scarcity of primary energy, it is necessary to work to reduce energy consumption related to lighting in buildings while ensuring that occupants enjoy good visual comfort. Physical-realistic simulation using light simulation software is a tool for evaluating various variants of a building. It can be used in multi-criteria optimization approaches with a view to deploying decision-support systems designed to identify the best possible trade-offs between energy consumption and user comfort. Insofar as the optical properties of building materials (opaque, transparent, coloured, isotropic, anisotropic and with textures or micro-reliefs) are an input to light simulation software, their characterization is an essential prerequisite for the implementation of this eco-design approach for buildings. The optical properties of materials are described by the mathematical formalism of the BSDF (Bidirectional Scattering Distribution Function) and can be integrated into most light simulation software in the form of analytical models or tabulated measurements. Widely used analytical models can be used to characterize optically simple materials but are difficult to extend to more complex materials. Moreover, no device currently exists that can finely characterise the full range of materials in a building in an operational time frame using tabulated measurements. Therefore, the aim of this thesis work is to design a device for the fast and accurate measurement of the optical characteristics of materials for the physico-realistic simulation of buildings. A first measuring device has been designed and has shown the feasibility of operating an instrument equipped with multi-sensors as a detector. It identified the pitfalls to be avoided as well as the obstacles to be circumvented for the design of a second, more operational measuring device with increased capabilities. Based on an instrument equipped with multi-sensors and a computer-controlled positioning system, it allows the measurement of the optical properties of the building's constituent materials in an operational context. The raw data acquisition and processing phases are supervised by computer. The duration of the measurements ranges from 5 minutes 40 seconds to 3 hours 2 minutes and 30 seconds. Their average repeatability is 97.88%
André, Julien. "Conception de réflecteurs pour des applications photométriques." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GRENT016.
The far-field reflector problem consists in building a surface that reflects light from a given source back into a target at infinity with a prescribed intensity distribution. This problem arises in many fields such as art or architecture. In this thesis, we are interested in applications to the car industry. Indeed, this thesis is conducted in partnership with the company Optis that develops lighting and optical simulation software used in the design of car headlights. Surfaces in car headlight reflectors must satisfy several constraints imposed by manufacturers as well as national and international regulatory authorities. These constraints can be objective such as space requirements or compliance with lighting legal standards but can also can be subjective such as the aesthetic aspects of surfaces. Our goal is to provide industrializable tools to solve the reflector problem while taking into account these constraints. First, we focus on the case of point light sources. We rely on the work of Oliker, Glim, Cafarrelli and Wang who show that the reflector problem can be formulated as an optimal transport problem. This formulation of the problem is presented and implemented in a discrete case. In a second step, we take into account some of the constraints imposed by car headlight manufacturers, such as the size and the style of the reflector. The chosen solution consists in using Bezier surfaces defined as the graph of a function parameterized over a planar domain. Bezier surfaces allow to obtain smooth surfaces and the parameterization over a planar domain allows to control the size and style of the reflector. To build the surface, we propose a heuristic based on a fixed-point algorithm. Finally, we take into account extended light sources. We present an approach that iteratively adapts the parameters of the reflector by minimizing the distance between the desired intensity and the reflected intensity. This led us to propose a method that efficiently evaluates the reflection of light on the surface. Methods developed in this thesis were implemented in an industrial setting at our partner company Optis
Semmaoui, Hicham. "Conception d'un lien de communication pour BioMicroRobot." Mémoire, Sherbrooke : Université de Sherbrooke, 2004. http://savoirs.usherbrooke.ca/handle/11143/1256.
Thomas, Baptiste. "Conception et synthèse d'hétéroglycoclusters pour l'immunothérapie anticancéreuse." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENV037/document.
Cancer is a major cause of mortality worldwide. Even if the rate of deaths has decreased thanks to early diagnostics and the creation of a variety of treatments, reccurence happen frequently. Among the main treatments, chimiotherapy shows a very high toxicity and radiotherapy often leads to the destruction of healthy cells, while released tumors can be left around by surgery. Immunotherapy offers a very interesting alternative to fight cancer. The development of therapeutical and/or prophylactical vaccines, able to treat and protect against tumors, seems to be an ambitious goal. Our team has recently described a new generation of synthetical vaccines which involve in the same molecule an oligosaccharide cluster (B cells epitopes), a chimer peptide (T cells epitopes) and a palmitic acid (adjuvant), bound on its N-terminal end. Immunological studies have revealed a reduction of the tumor size and a spectacular increase of the survival rate on mice, without having to administrate any extern adjuvant. On the basis of these studies, our goal has been to develop a chemical approach which would give access to more sophisticated and more immunogenic structures. To do this, we have developed methodologies of chemoselective synthesis, such as oxime ligation, Cu(I) catalysed alkyne-azide cycloaddition, (CuAAc), the thiol-chloroacétyle (TCC) and/or the thiol-ène coupling (TEC), to prepare homoglycoclusters (4-, 16- or 64- valent) or heteroglycoclusters of variable combination (2+2, 3+1, 4+2, 4x1, 8+8, 4x4) via different kind of chemical links (oxime, triazole, thioéther). These methods have been applied to the synthesis of vaccine candidates having the same carbohydrate Tn and/or TF and an immunostimulating peptide. Some biological studies with bacterial (LecB) or vegetal (UEA-I) lectines have been realised to highlight the glycosylated compounds's templates (Fuc, Man, Gal) synthesized during this PhD and have revealed nanomolar ligands. The immunological studies currently in progress on our vaccine candidates will help to understand the influence of the linker, the valence and the antigen composition on the immune response created
Hentz, Gauthier. "Outils numériques pour la conception de mécanismes." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAD021/document.
In the medical and surgical background, robotics can be of great interest for safer and more accurate procedures. Size constraints are however strong and complex movements may be necessary. To date, the design of dedicated non-conventional mechanisms is then a difficult task because of a lack of generic tools allowing a fast evaluation of their performances. This thesis combines higher-order continuation and automatic differentiation to adress this issue through the introduction of a generic modelling method and a generic formalism for mechanism design. Our contributions especially concern the development of numerical tools for the evaluation of the workspace, of the singularity localization and nature, and for a higher-order sensitivity analysis. These tools are evaluated on reference mechanisms
Collin, Alexis. "Pour une conception renouvelée de la prescription." Paris 11, 2008. http://www.theses.fr/2008PA111009.
Alkarmo, Ahmad. "Conception de filtres dissipatifs pour applicateurs microondes." Toulouse, INPT, 1997. http://www.theses.fr/1997INPT058H.
Masmoudi, Mohamed. "Outils pour la conception optimale de forme." Nice, 1987. http://www.theses.fr/1987NICE4094.
Nguimjeu, Christelle. "Conception et réalisation d'emballages actifs pour l'agroalimentaire." Thesis, Dijon, 2012. http://www.theses.fr/2012DIJOS067.
No abstract
Maris, Ferreira Pietro. "Méthodologie de conception AMS/RF pour la fiabilité : conception d'un frontal RF fiabilisé." Phd thesis, Télécom ParisTech, 2011. http://pastel.archives-ouvertes.fr/pastel-00628802.
Halin, Gilles. "Modèles et outils pour l'assistance à la conception. Application à la conception architecturale." Habilitation à diriger des recherches, Institut National Polytechnique de Lorraine - INPL, 2004. http://tel.archives-ouvertes.fr/tel-00101454.
Enfin, afin d'assister certaines activités de conception qui peuvent être collectives, et en considérant la spécificité de l'activité de conception, nous proposons, sous la forme d'un meta-modèle, une représentation du contexte de coopération ainsi qu'une visualisation de ce contexte adaptée à la représentation imagière de l'architecte. Toutes ces approches ont fait l'objet d'applications et d'expérimentations en mettant en oeuvre les dernières technologies de l'information.
Di, pendina Gregory. "Conception innovante et développement d'outils de conception d'ASIC pour Technologie Hybride CMOS / Magnétique." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00750121.
Domette, Lauriane. "Les dispositifs de discussion sur le travail : conception pour l’usage, conception dans l’usage." Thesis, Paris, CNAM, 2019. http://www.theses.fr/2019CNAM1236/document.
This research deals with “Work Discussion Spaces”. Work Discussion Spaces (WDSs) are currently developed, both in practice and in theory. This thesis further reflects upon the design of these spaces, the methodology of their implementation, their conditions of use and their sustainability over time. It also examines their implications for management, participation and decision-making.The thesis builds upon the constructive ergonomics approach, aiming to open it to the management approach. The aspiration of constructive ergonomics is to develop “enabling organizations”, that is to say organizations which are able to develop themselves by creating a space for work discussions, thus permitting the growth of both the individual and the collectives. Management science develops the idea of a governance model “open to discussion” at every level of the hierarchy, thus permitting subsidiarity (i.e. decision-making at the lowest relevant level of the hierarchy). This thesis then defends the idea that enabling a sustainable debate in the workplace requires to apprehend Work Discussion Spaces in the light of activity issues, following bottom-up dynamics, while promoting institutional support for the discussion, with a more top-down logic.To that end, four situations of use of Work Discussion Spaces were studied in two social protection organizations, in a bank institute and at “La Poste”. The Work Discussion Spaces that were implemented were considered as “artifacts”, designed for use by designers and adapted in use by its users. In order to identify the various forms given to and taken by them, their evolution was studied following two different temporal scales: from one company to the other, and within two companies.Results show that, according to situations, Work Discussion Spaces were accommodated in different ways, emphasizing the importance of adapting modalities of discussion to local specificities. WDSs enabled regulation of work situations and have challenged some traditionally top-down managerial cultures, initiating an evolution towards a more participatory and subsidiary management style. In order to guarantee their sustainability, the Work Discussion Spaces need both to organize the “discussion space”, in particular by organizing subsidiarity, and to rely on an intervention that takes into account the specificity of each activity, following a participatory and voluntarist design approach
Di, Pendina Grégory. "Conception innovante et développement d'outils de conception d'ASIC pour Technologie Hybride CMOS / Magnétique." Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENT035/document.
For several years many non-volatile technologies have been appearing and taking place mainly in the memory world, aiming at replacing all kind of memory. Their assets let thinking that some of them, specially the MRAM technologies, could improve the integrated circuit performances, using their so called magnetic components in the logic, in particular the magnetic tunnel junctions. To evaluate the potential benefits, it is necessary to be able to design such a circuit. That is the reason why we are proposing a full design kit for both full custom and digital designs, allowing all the design steps. Part of this kit has been used by partners in research project to design demonstrators. We also propose in this kit an innovative ultra-compact magnetic latch, for which 2 patents have been deposited, integrated in a flip-flop. Finally, we present the integration of magnetic components for two applications, security and low power, as well as a case study which shows that the static consumption reduction can be huge
Le, Xuan Sang. "Co-conception Logiciel/FPGA pour Edge-computing : promotion de la conception orientée objet." Thesis, Brest, 2017. http://www.theses.fr/2017BRES0041/document.
Cloud computing is often the most referenced computational model for Internet of Things. This model adopts a centralized architecture where all sensor data is stored and processed in a sole location. Despite of many advantages, this architecture suffers from a low scalability while the available data on the network is continuously increasing. It is worth noting that, currently, more than 50% internet connections are between things. This can lead to the reliability problem in realtime and latency-sensitive applications. Edge-computing which is based on a decentralized architecture, is known as a solution for this emerging problem by: (1) reinforcing the equipment at the edge (things) of the network and (2) pushing the data processing to the edge.Edge-centric computing requires sensors nodes with more software capability and processing power while, like any embedded systems, being constrained by energy consumption. Hybrid hardware systems consisting of FPGA and processor offer a good trade-off for this requirement. FPGAs are known to enable parallel and fast computation within a low energy budget. The coupled processor provides a flexible software environment for edge-centric nodes.Applications design for such hybrid network/software/hardware (SW/HW) system always remains a challenged task. It covers a large domain of system level design from high level software to low-level hardware (FPGA). This result in a complex system design flow and involves the use of tools from different engineering domains. A common solution is to propose a heterogeneous design environment which combining/integrating these tools together. However the heterogeneous nature of this approach can pose the reliability problem when it comes to data exchanges between tools.Our motivation is to propose a homogeneous design methodology and environment for such system. We study the application of a modern design methodology, in particular object-oriented design (OOD), to the field of embedded systems. Our choice of OOD is motivated by the proven productivity of this methodology for the development of software systems. In the context of this thesis, we aim at using OOD to develop a homogeneous design environment for edge-centric systems. Our approach addresses three design concerns: (1) hardware design where object-oriented principles and design patterns are used to improve the reusability, adaptability, and extensibility of the hardware system. (2) hardware / software co-design, for which we propose to use OOD to abstract the SW/HW integration and the communication that encourages the system modularity and flexibility. (3) middleware design for Edge Computing. We rely on a centralized development environment for distributed applications, while the middleware facilitates the integration of the peripheral nodes in the network, and allows automatic remote reconfiguration. Ultimately, our solution offers software flexibility for the implementation of complex distributed algorithms, complemented by the full exploitation of FPGAs performance. These are placed in the nodes, as close as possible to the acquisition of the data by the sensors† in order to deploy a first effective intensive treatment
Liang, Wanru. "Long Shu zai "Zhong lun" li suo chan fa de fang fa lun ji zhen li guan = A study of the methodology and the conception of truth as presented in the Mūlamadhyamakakārikā /." click here to view the abstract and table of contents, 1996. http://net3.hkbu.edu.hk/~libres/cgi-bin/thesisab.pl?pdf=b14245425a.pdf.
Konate, Jacqueline. "Approche système pour la conception d'une méthodologie pour l'élicitation collaborative des exigences." Phd thesis, Université Paul Sabatier - Toulouse III, 2009. http://tel.archives-ouvertes.fr/tel-00435878.
Konaté, Jacqueline. "Approche système pour la conception d'une méthodologie pour l'élicitation collaborative des exigences." Toulouse 3, 2009. http://thesesups.ups-tlse.fr/689/.
This thesis treats the collaboration issues of design teams in the context of System Engineering (SE). Systems are more and more complex; their design requires the involvement of various skills, i. E. , several stakeholders. This also involves team work between different stakeholders. Since this needs to be done correctly, it is necessary to define the methods required. In order to accomplish this, we were interested in collaboration that we considered more elaborated than simply group work. Indeed, collaboration is intended to be a group work that is better organized and structured, with clearly defined rules. To understand this problem more clearly, we were particularly interested in the process of identifying the needs of the system also called Requirements Engineering (RE), which is the first phase of the Engineering System. RE is a very complex process during which system requirements have to be defined based on needs from different stakeholders concerned in one way or another by the realization of the system. We make a distinction between the need that is the perception of a final user of the system, and the requirement that is the vision, in technical terms, that a designer or a developer has of the system. Indeed, requirement is the technical expression of a need and it will be recorded in the specifications book in order to be transferred to the system realization team. The process of needs collection and the transformation of these needs into technical requirements is critical and requires involvement of all stakeholders. As a result of this, we decided to adopt a collaborative approach to deal with the complexity of this process. Thus, in order to define the boundaries and scope of our research work, we made a literature review on RE. We have more focused on the phase of Requirements Elicitation, the first phase of RE, because it requires the committed participation of all stakeholders. Given the nature of the problem, we have distinguished two domains in which our research work is located: RE through Requirements Elicitation and Collaboration. .
Orquéra, Myriam. "Conception pour la fabrication additive : approche méthodologique pour les systèmes mécaniques multicorps." Thesis, Toulon, 2019. http://bu.univ-tln.fr/userfiles/file/intranet/travuniv/theses/sciences/2019/2019_Orquera_Myriam.pdf.
Topological optimization (TO) is a mathematical tool used to obtain an optimal distribution of material density. From a given volume, subjected to loads, the TO leads to a concept of part fulfilling an objective and respecting constraints. The optimized part shapes are often too complex to be manufacturable thanks conventional processes. Additive manufacturing (AM) allows the material to be deposited where it is needed. Consequently, the choice of AM to manufacture topological optimized parts is often wise. In scientific literature, published design methods often remain applied to a single mechanical part, with few articles dealing with the design optimization of a product. The purpose of this PhD is to suggest a design method of an additively manufactured multibody mechanical system. It is composed of parts linked together and have relative motions. For this purpose, and in order to take advantage of all the possibilities of the AM, this manuscript suggests in a first step a classification of the optimizations achievable during the design of a product. Three optimizations are identified: architectural optimization, functional optimization and topological optimization. Both the application timeline and a demonstration of the contributions of each optimization are established. In a second step, a topology optimization methodology of multibody systems (denoted TOMS for Topological Optimization of a Mechanical System) is developed to take into account the interaction of the mass and inertia decrease on each part of the system. An organization chart is introduced. It presents a method of loop optimization in order to take into account new boundary conditions. Then, different paths for managing the impact of inertia are shown. Finally, a path ranking taking into account the objectives of the designer is proposed and some optimization principles are suggested. At last, these three optimizations are one step in the process of designing a product. In order to achieve this step with all the skills and knowledge in AM, a global design methodology is proposed. This methodology helps designers to design a single part as well as a multi-body mechanical system, from the specifications to final product
SCARAVETTI, Dominique. "Formulation préalable d'un problème de conception, pour l'aide à la décision en conception préliminaire." Phd thesis, Ecole nationale supérieure d'arts et métiers - ENSAM, 2004. http://tel.archives-ouvertes.fr/tel-00008800.
Nous proposons un système d'aide à la décision en conception préliminaire, permettant de partir de plusieurs concepts de solution pertinents, pour arriver à une architecture validée et prédimensionnée en objectivant les choix de conception.
Les grandes étapes sont : (i) l'écriture du problème de conception préliminaire sous forme de Problème par Satisfaction de Contraintes (PSC), (ii) la recherche exhaustive des architectures solutions, (iii) l'exploitation et la réduction de l'espace des solutions pour aider à la décision. C'est seulement ensuite qu'un choix est à faire parmi ces solutions, qui n'ont pas été arbitrairement restreintes par des choix initiaux.
Les étapes (i) et (iii) nécessitent une analyse préalable du problème de conception. Il faut, d'une part, le limiter aux seules caractéristiques nécessaires et suffisantes pour la conception architecturale, que nous nommons caractéristiques structurantes. D'autre part, il faut exprimer les objectifs de conception et les critères de qualification de la conception, qui permettent de hiérarchiser les architectures-solutions obtenues et ainsi aider au choix final parmi elles.
Nous proposons pour cela une démarche systématique d'analyse et structuration du problème de conception, basée sur quatre étapes, depuis l'analyse du besoin jusqu'à une approche physique, en passant par des approches fonctionnelle et organique du produit à concevoir. Des tableaux systématiques sont proposés.
Notre approche est confrontée avec la démarche 'classique' d'un groupe de concepteurs, pour une même conception architecturale. L'utilisation du système d'aide à la décision permet une amélioration de la satisfaction des objectifs de conception, le choix du concept de solution le plus performant, l'obtention d'architectures-solutions valides et respectant toutes les contraintes énoncées. On dispose ainsi d'éléments dimensionnels pour poursuivre en conception détaillée sans subir les itérations engendrées par le processus essai-erreur.
DUCOUSSO, LAURENT. "Methodologie de conception de microprocesseurs vlsi pour unite centrale de grands systemes : conception physique." Paris 6, 1990. http://www.theses.fr/1990PA066487.
Noomtong, Chaiwat. "Conception des matrices pour l'extrusion de profilés d'aluminium dans un contexte de conception intégrée." Grenoble INPG, 2006. http://www.theses.fr/2006INPG0120.
Aluminium extrusion die design is one of the crucial areas of aluminium hot extrusion process. Traditionally, the die designer creates a new die based on his/her previous experiences and skills by using sketching on blue print or CAD drawing that is not weIl defined and cannot share information to other departments. Ln concurrent engineering philosophy, die design knowledge should be shared in central database and related department operators can access it concurrently. Furthermore, the die designer knowledge integration and cooperative work each design phase among die design team members would be discussed. Ln order to support cooperative design, the CORBA technology is presented. The knowledge of die design is stored in the computer system and we can use it to design a die. The objectives of this research are development the tools in order to help a die designer design an extrusion die based on integrated design and to evaluate the process cost of the extrusion workpiece
Scaravetti, Dominique. "Formulation préalable d'un problème de conception, pour l'aide à la décision en conception préliminaire." Paris, ENSAM, 2004. https://pastel.archives-ouvertes.fr/pastel-00001138.
In the early phases of a traditional design process, many decisions are often made by designers. For that purpose, they take advantage of their experience and company knowledge. These decisions are necessary in a sequential design process but may hide many embodiment solutions. Moreover, designers often use a time consuming trial-and-error mode to find a working combination of standard elements. To overcome these difficulties, a decision support system based on constraint programming is proposed. The object of the design process set out in this work is to facilitate the embodiment design phase by avoiding a-priori decision making and searching for feasible architectures in which all the points of view of the various participants in the project are taken into account. The main stages are: the writing of the design problem into a Constraints Solving Problem (CSP) form, the exhaustive search for the feasible architectures, the exploitation and the reduction of the solutions space to help in the decision making. A preliminary analysis of the design problem is necessary. On one hand, it is essential to restrict the design problem to the only necessary and sufficient characteristics for the embodiment design phase, which we name structuring characteristics. On the other hand, it is necessary to express the design objectives and the qualification criteria of the design, in order to sort the embodiment solutions being obtained. An exhaustive four step method is detailed in this thesis. To determine the most interesting solutions, objectives and performance indicators are entered. Finally, the benefits of our approach are discussed
Altabban, Wissam. "Conception portable d'une ADPLL pour des applications TV." Phd thesis, Télécom ParisTech, 2009. http://pastel.archives-ouvertes.fr/pastel-00570695.
Jeangeorges, Mickaël. "Conception d'antennes miniatures intégrées pour solutions RF SiP." Phd thesis, Université de Nice Sophia-Antipolis, 2010. http://tel.archives-ouvertes.fr/tel-00544576.
Hoël, Antonin. "Conception et analyse d'un microsystème pour l'injection transdermique." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2007. http://tel.archives-ouvertes.fr/tel-00463096.
Kreuawan, Sangkla. "Modélisation et conception optimale pour les applications ferroviaires." Phd thesis, Ecole Centrale de Lille, 2008. http://tel.archives-ouvertes.fr/tel-00363633.
La conception systémique optimale de composant électrotechnique est abordée dans cette thèse. Une chaîne de traction électrique est choisie comme exemple représentatif d'un système complexe. La démarche et les outils sont mis en œuvre sur deux applications: la conception d'un moteur de traction et la conception simultanée de plusieurs composants clés.
Pour concevoir un moteur de traction, le cycle de fonctionnement et le comportement thermique transitoire sont primordiaux. La bonne adaptation du moteur à sa mission permet de réduire considérablement sa masse. L'approche multidisciplinaire est utilisée pour gérer les interactions entre modèles de disciplines différentes au sein d'un même processus d'optimisation. Suivant la méthode employée, le temps d'optimisation peut être réduit grâce à la répartition des taches par domaine physique et d'en paralléliser l'exécution. Des optimisations multiobjectif ont également été appliquées. Des fronts de Pareto sont obtenus malgré l'utilisation d'un modèle précis mais coûteux, le modèle éléments finis.
L'approche décomposition hiérarchique de la méthode "Target Cascading" est appliquée au problème de conception de la chaîne de traction. Le système et ses composants sont conjointement conçus. Cette méthode est bien adaptée à la démarche de conception optimale des systèmes complexes, tout en respectant l'organisation par produit de l'entreprise.
Relun, Nicolas. "Stratégie multiparamétrique pour la conception robuste en fatigue." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2011. http://tel.archives-ouvertes.fr/tel-00669449.
Rey, Laurent Edouard. "Environnement pour la conception de commandes de robots /." [S.l.] : [s.n.], 1997. http://library.epfl.ch/theses/?nr=1663.
Paychère, Cédric. "Conception d'entraînements électriques intégrés pour dispositifs multi-axiaux /." [S.l.] : [s.n.], 1997. http://library.epfl.ch/theses/?nr=1693.
Palanchoke, Ujwol. "Conception et réalisation de trieur spectraux pour l'imagerie." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GRENT018/document.
The advancement and scaling effect in complementary metal oxide semiconductor (CMOS) and micro-electro-mechanical system (MEMS) technology has made possible to make smaller image sensors with higher density of imaging pixels to respond at the demand of low cost imagers. Generally, the higher pixel density in imaging system is achieved by shrinking the size of each pixel in an array. The shrinking of pixel dimension however deteriorates the optical efficiency and therefore impose the tradeoff between the performance and minimum achievable pixel size. As the pixel size continues to shrink and approach the dimensions comparable to the wavelength, the spectral separation techniques used in current generation imaging system should be revised and new design methodologies have to be explored. This dissertation explored different techniques that could be used to efficiently sort the band of different wavelengths, mainly in far-infrared (8µm - 12µm) and visible (0.4 µm – 0.7 µm) spectrum in different spatial locations. We introduced the concept of spectral sorting based on normalized optical efficiency (NOE). For given number of pixels (N) or detectors, we define the phenomenon of sorting if NOE of individual pixels, considering incidence power from all pixel domain, is greater than 1/N. First we study differently sized optical patch antenna to efficiently sort the infrared light in different spatial locations using numerical techniques. Using array of such antennas we find the near perfect absorption of multiple wavelengths in infrared spectrum. The antenna arrays are fabricated and characterized in CEA-LETI platform to validate our study. We also report our study on using two differently sized Metal-Semiconductor-Metal (MSM) nanostructures to achieve absorption higher than 50% in individual silicon detector for visible spectrum. Finally we present our study on grating based dielectric multilayer structure for sorting of visible light which could enable to shrink the pixel size of visible imaging system to submicron dimension. We derived the comprehensive design strategy of such sorting structure and present the sorting structure designed to achieve optical efficiency as high as 80% in pixel size of as less as 0.5µm
Crespo, Olivier. "Conception par simulation pour la conduite de culture." Phd thesis, Université Paul Sabatier - Toulouse III, 2008. http://tel.archives-ouvertes.fr/tel-01054339.
Rubbert, Lennart. "Conception de mécanismes compliants pour la robotique chirurgicale." Phd thesis, Université de Strasbourg, 2012. http://tel.archives-ouvertes.fr/tel-00801892.
Nguyen, Trong duc. "Conception d'antenne intelligente reconfigurable pour la radio cognitive." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00859818.
Plouzeau, Noël. "Eléments pour une conception méthodique des algorithmes répartis." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376175866.
Langlois, Olivier Roboam Xavier Piquet Hubert. "Conception d'un réseau de secours électrique pour l'aéronautique." Toulouse : INP Toulouse, 2006. http://ethesis.inp-toulouse.fr/archive/00000243.
Atoui, Hussein Rubel Paul Fayn Jocelyne. "Conception de systèmes intelligents pour la télémédecine citoyenne." Villeurbanne : Doc'INSA, 2006. http://docinsa.insa-lyon.fr/these/pont.php?id=atoui.
Ríos, zapata David. "Démarche méthodologique pour la conception préliminaire et interactive." Thesis, Paris, ENSAM, 2018. http://www.theses.fr/2018ENAM0066/document.
Preliminary design decision-making processes are related to the prioritisation of design specifications and variables in order to develop solutions that are closer to product's requirements. Nevertheless, the size of the information is often large and hard to understand: keeping in track the list of dependent variables, independent variables and design objectives is a challenging task, with potentially reprocessing and loss of time, especially when it is necessary to identify how a modification on a variable might impact the performance of the product.The objective of this thesis is to generate a method that can obtain a trade-off among the design objectives desirability. This trade-off process is supported on two aspects: i) the development of a traceability model, managing information from the input requirements (in the linguistic field) up to the variables definition (in the real numbers field). ii) A design amelioration framework, based on the definition of the design objectives desirability functions; the propagation of these functions until design variables allow to calculate the combinations of values that maximise the global desirability of the solution.The proposal of the thesis can be understood as a hybrid approach, including an interactive exploratory part and an inductive interactive part. On the exploratory part, designers can modify the variables using visual tools in order to understand in real time how these modifications have an impact on the design objectives. On the inductive part, designers make use a proposed pre-sizing method that calculates the values of the variables that maximise the desirability of the design objectives. This proposal is developed to perform on a multidisciplinary design environment, facing, either convex and non-convex problems
Onambélé, Essono Ela Charles. "Conception de convertisseurs de puissance pour applications contraignantes." Thesis, Amiens, 2018. http://www.theses.fr/2018AMIE0013/document.
The use of multiphase electromechanical conversion systems is increasing steadily in different fields like energy and transportation. This thesis aims to propose solutions which are technologically viable, allowing to design power converters for severe applications: both in terms of performances (high efficiency, modularity, etc.) and physical environment (high ambient temperature, reduced volume...). Wide band gap semiconductor technologies are studied (silicon carbide and gallium nitride) in order to integrate them in co-simulation models with hexaphase machines. Besides, a 3D thermal analysis of power electronic systems for such applications is proposed, knowing that the finite element model considers different severe requirements of the system. An experimental validation of the semiconductor technology is carried out successfully
Delgerie, Xavier. "Conception d’un simulateur de conduite pour véhicule Spyder." Mémoire, Université de Sherbrooke, 2013. http://hdl.handle.net/11143/9572.
Loup, Guillaume. "Conception et développement d’interactions immersives pour jeux sérieux." Thesis, Le Mans, 2017. http://www.theses.fr/2017LEMA1041/document.
This thesis is in the field of the virtual environments for human learning. Digital Epistemic Games (DEG) are a category of serious games dedicated to solving complex, multidisciplinary and non-deterministic problems. The objective of DEGs is to propose authentic learning situations in terms of interactions so that learners can construct and anchor knowledge in their context of use.The first part of the thesis is devoted to exploring spatial, temporal and social dimensions of DEG interactions. Experiments were conducted in ecological environment and showed an educational contribution through an increase in the learner engagement. The design of the prototypes showed that the development of the immersive interactions of a virtual environment for human learning currently remains reserved for specialists in Mixed Reality or Virtual (MVR).So the second part of the thesis was the proposal of a development environment named MIREDGE. A visual programming interface allows developers to model interactions without specific knowledge in MVR through the reuse of blocks. Experiments have evaluated the effectiveness and efficiency of MIREDGE for specialist and non-specialist developers in MVR.As specialist developers in MVR have to continue their algorithm beyond visual programming, MIREDGE allows automatic generation of code providing the corresponding script being totally re-editable in their game engine. The MIREDGE approach ensures wide compatibility with development environments and peripherals. This opens perspectives on the study of the logics of universal interactions
Nguyen, Trong Duc. "Conception d'antenne intelligente reconfigurable pour la radio cognitive." Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENT027/document.
Reconfigurable antennas offer multiple functions by dynamically changing their properties such as operating frequency, polarization, radiation pattern, and a combination of all these factors. Their agility and diversity create a wide range of different and new applications for radio systems such as local networks, satellites, and especially in cognitive radio. In this thesis, two new frequency reconfigurable antennas are proposed. The frequency reconfiguration is obtained by changing the geometry of radiating patch. Their dimensions have been optimized by genetic algorithm embedded in the electromagnetic simulation software. These antennas operate at the frequency band for IEEE 802.11b/g standard with satisfactory radiation characteristics. This thesis also presents a method of controlling the operation of the frequency reconfigurable antenna by a micro-controller. The operation of electronic switches (PIN diodes) are carried out through programs which allows an adaptive operating system like smart antennas and work well in cognitive radio environment
Nefzaoui, Elyes. "Conception et optimisation d'émetteurs sélectifs pour applications thermophotovoltaïques." Thesis, Poitiers, 2013. http://www.theses.fr/2013POIT2257/document.
Thermo-photovoltaic conversion of thermal radiation is a concept that has been thoroughly investigated during the two last decades because of its high efficiency when compared to classical photovoltaics (PV). These high performances are mainly due to the good-matching between the thermal source radiation spectrum and the PV cell conversion spectrum. Maximal efficiencies areobtained with coherent sources that emit in narrow spectral bands, just above the band gap energy of the cell. In this report, a stochastic method to design and optimize such sources, the particle swarm optimization in this case, is firstly presented. This method leads to simple one-dimensional structures, composed of thin films of dielectrics, metals and semiconductors. The radiativeproperties of these sources are easily tunable with control parameters as simple as films thicknesses and doping concentrations. They are stable at high temperatures up to 1000 K. Second, a parametric optimization study of usual materials optical properties models (Drude and Lorentz) is presented in order to maximize radiative heat transfer between semi-infinite planes separated by nanometric gaps. This leads to a simple tool in the form of abacuses which would guide the choice of relevant materials to maximize the output power of nano thermo-photovoltaic devices