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Auswahl der wissenschaftlichen Literatur zum Thema „Jumeaux numériques“
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Zeitschriftenartikel zum Thema "Jumeaux numériques"
Josse, Fanny, und Sylvain Riss. „Le « jumeau numérique environnemental » à l’échelle du territoire, les données au cœur des cas d’usage“. SHS Web of Conferences 198 (2024): 03003. http://dx.doi.org/10.1051/shsconf/202419803003.
Der volle Inhalt der QuelleBertezene, Sandra. „Le jumeau numérique en santé“. médecine/sciences 38, Nr. 8-9 (August 2022): 663–68. http://dx.doi.org/10.1051/medsci/2022105.
Der volle Inhalt der QuelleSaddem, Ramla. „Retour d’expérience de l’utilisation de jumeaux numériques dans la formation d’ingénieurs autour de l'industrie 4.0“. J3eA 22 (2023): 1029. http://dx.doi.org/10.1051/j3ea/20231029.
Der volle Inhalt der QuelleLovato, David. „Le faux numérique ou la promesse d’une réalité nouvelle“. Revue de la recherche juridique, Nr. 1 (03.01.2022): 191–208. http://dx.doi.org/10.3917/rjj.193.0191.
Der volle Inhalt der QuelleBIDEUX, Gilles, und Bertrand VANDEN BOSSCHE. „Comment les jumeaux numériques vont révolutionner la gestion patrimoniale des usines“. TSM 12 2023, TSM 12 2023 (20.12.2023): 35–39. http://dx.doi.org/10.36904/tsm/202312035.
Der volle Inhalt der QuelleMoingeon, Philippe, Christiane Garbay, Muriel Dahan, Irène Fermont, Ali Benmakhlouf, Alain Gouyette, Pierre Poitou und Alain Saint-Pierre. „L’intelligence artificielle, une révolution dans le développement des médicaments“. médecine/sciences 40, Nr. 4 (April 2024): 369–76. http://dx.doi.org/10.1051/medsci/2024028.
Der volle Inhalt der QuelleTijus, Charles. „Après-propos. L’intelligence artificielle : une autre intelligence ?“ Enfance N° 1, Nr. 1 (28.03.2024): 51–60. http://dx.doi.org/10.3917/enf2.241.0051.
Der volle Inhalt der QuelleOrlhac, F., C. Nioche, I. Faouzi, M. Soussan und I. Buvat. „Identification de lésions tumorales présentant des caractéristiques radiomiques similaires : introduction du concept des jumeaux numériques“. Médecine Nucléaire 41, Nr. 3 (Mai 2017): 169–70. http://dx.doi.org/10.1016/j.mednuc.2017.02.083.
Der volle Inhalt der QuelleGellot, François, Stéphane Lecasse, Bernard Riera und Alexandre Philippot. „Retour d’expérience sur l’utilisation d’un jumeau numérique pour l’enseignement de l’automatisme“. J3eA 22 (2023): 1024. http://dx.doi.org/10.1051/j3ea/20231024.
Der volle Inhalt der QuellePetitpas, Laurent, und Frédérick Van Meer. „L’utilisation de fichiers 3D pour la création d’un clone virtuel“. Revue d'Orthopédie Dento-Faciale 55, Nr. 1 (Februar 2021): 53–72. http://dx.doi.org/10.1051/odf/2021005.
Der volle Inhalt der QuelleDissertationen zum Thema "Jumeaux numériques"
Hammoumi, Adam. „Analysis-Driven Design of Digital Multi-scale Microstructures of Materials“. Electronic Thesis or Diss., université Paris-Saclay, 2022. http://www.theses.fr/2022UPASG083.
Der volle Inhalt der QuelleThe global demand for energy is increasing rapidly around the world. Heterogeneous catalysis is behind most of the principles of green chemistry: energy saving processes, atom efficiency, cleaning processes, etc. Catalysis in general, and heterogeneous catalysis, has very quickly become an essential tool for the development of industrial chemistry. Currently, 85 % of the industrial processes used throughout the world are catalytic. In this context, many efforts are being made to optimize heterogeneous catalysts to meet the increasing demand for energy while reducing the environmental impact of fuels. For these reasons, and many others, the design of new catalytic materials today is a hot topic. The current approach regarding the design of catalysts tends towards a controlled elaboration of materials whose texture will be controlled, ordered, and hierarchically structured from the nanometer to the micrometer scale. These catalysts will have to be more active, and stable (energy efficiency), and more selective (saving atoms, less rejects). Within this framework, this research work focuses on the creation of numerical twins of microstructures aiming in-fine the retro-design of porous materials for optimal usage properties. The applications concern catalysis supports and construction materials, with priority given to the improvement of multi-physical properties considering textural properties of these materials. The contribution of this thesis is a new numerical framework allowing the modeling and characterization of these materials. This new approach builds upon random models to represent realistic multi-scale and complex microstructures. To extract the textural properties of these microstructures, two numerical methods have been developed in a first step. The first one allows us to characterize the porosity network of a microstructure and to compute its pore size distribution, and the second one allows us to compute the geometrical tortuosity of these materials with a fast graph search approach. Regarding the same topic, our major contribution is a morphological model that simulates in an original way gas physisorption by means of mathematical morphology and percolation operators. Gas physisorption is one of the most used experimental techniques for the characterization of the textural properties of porous materials. The model has been validated on real materials designed for this thesis. Deep learning has also been widely explored. First, a new approach building upon convolutional neural networks has been proposed. The latter proposes a solution to improve the learning quality when there is little input training data. A second contribution allowed us to store the morphological information of the previous model in a 3D volume, and to capture inter-slice information into 2D slices. The overall process transformed the initial problem into a deep learning problem, which considerably reduced the computation time of the gas physisorption model
Chabanet, Sylvain. „Contributions aux ombres et jumeaux numériques dans l’industrie : proposition d’une stratégie de couplage entre modèles de simulation et d’apprentissage automatique appliquée aux scieries“. Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0131.
Der volle Inhalt der QuelleThis thesis is part of the ANR project Lorraine-Artificial Intelligence, a multi-disciplinary project promoting research into both artificial intelligence itself, and its applications to other fields. As such, this thesis focuses on the development and use of machine learning models as a substitute for simulation models. Interest in this research topic is fueled by academic and industrial interest in the concept of digital shadows and twins, seen as an evolution of simulation models for long-term use at the heart of systems and processes. The main contribution of this thesis is the proposal of a coupling strategy between a simulation model and a surrogate model performing the same prediction task repeatedly on a data stream. The simulation model is assumed to have a high level of fidelity, but to be too slow or computationally expensive to be used alone to perform the full range of prediction required. The surrogate model is a fast machine-learning model that approximates the simulation model. The primary objective of the proposed coupling strategy is the efficient use of limited computational resources by intelligently allocating each prediction request to one of the two models. This allocation is, in particular, inspired by active learning and based on the evaluation of the level of confidence in the predictions of the machine learning model. Numerical experiments are first carried out on eight datasets from the scientific literature. An application to the sawmilling industry is then developed
Haoua, Abdoulaye affadine. „Smart Machining pour l’assemblage aéronautique“. Electronic Thesis or Diss., Paris, HESAM, 2023. http://www.theses.fr/2023HESAE090.
Der volle Inhalt der QuelleHybrid stacks comprising of composite CFRP layers, TA6V, and aluminum alloy, referred to as multi-material, are widely used in aerospace components. One-shot drilling, using an Automatic Drilling Unit (UPA), of these stacks poses major challenges due to the difference in machinability among the various materials within the stack. To meet quality requirements, improve tool life and achieve optimal productivity during the drilling of multi-material stacks with an electric UPA, it is essential to adapt cutting parameters during machining. However, there are currently no tools available to meet this need. This theisis conerns machine learning-based solutions for the implementation of smart drilling strategies incorporating adaptive machining. These solutions focus on the development of robust and reliable methodologies for identifying materials, detecting tool wear, and detecting multi-material drilling-related incidents (tool breakage, chip jamming, lubrication issues, cutting edges chipping). Fristly, a new approach to incident detection was proposed, based on unlabeled industrial data and clustering algorithms: K-means and hierarchical ascending classification. This approach enabled us to identify a number of incidents, and highlighted the difficulties associated with processing industrial data (rarity of incidents and absence of labels) and the difficulties associated with defining the optimum parameters for machine learning algorithms. Subsequently, experiment are performed on an specialized instrumented drilling bench and on Al7175/CFP and CFRP/Al7175 stacks. This led to the development and validation of an original material identification methodology based on Random Forest (RF). The results, in terms of material classification (Al7175, CFRP), enabled the extension of the RF model to different stack configurations with various tool diameters and a wide range of cutting conditions. This methodology will enable the implementation of an adaptive machining process on an electric UPA for multi-material drilling.Keywords : Adaptive drilling, Multi-material stacks drilling, Material recognition, Random Forest, Tool Wear, Unsupervised learning, Electric UPA, Signals analysis
Leclerc, Lucas. „Quantum computing with Rydberg atoms : control and modelling for quantum simulation and practical algorithms“. Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP046.
Der volle Inhalt der QuelleRefining our understanding of an unknown system through modelling lays the groundwork for optimally controlling it and opens the door to a myriad of potential applications, exploiting the once enigmatic and unpredictable effects of this now-known system. This thesis applies this paradigm to analog quantum computing with Rydberg atoms, showcasing how careful noise modelling, optimal control and machine learning frameworks can support and enhance the simulation of quantum magnetism and the solving of graph-based optimisation and classification problems. After describing the experimental platform enabling the control of Rydberg atoms, we introduce classical tools such as digital twins of noisy systems, tensor network modelling, robust optimal control, and Bayesian optimisation for variational algorithms. We apply the latter to several applications. We improve the preparation of antiferromagnetic state in the Ising model and benchmark the noisy behaviour of a dipolar XY quantum simulator when probing continuous symmetry breaking and performing quantum state tomography. Using optimisation techniques and machine learning methods, we also tackle industrial use cases such as maximum independent set on graphs representing smart charging tasks, binary classification of toxic or harmless molecular compounds, and prediction of fallen angel companies in financial risk management
Coupry, Corentin. „Approche mixte RV/RA, couplée au concept de jumeau numérique, comme support d’opérations de maintenance collaborative à distance : application aux équipements techniques de bâtiment“. Electronic Thesis or Diss., Angers, 2023. http://www.theses.fr/2023ANGE0066.
Der volle Inhalt der QuelleTechnological advances in Industry 4.0 have paved the way for new methodologies and technologies, including digital twins (DT) and extended reality (XR) tools. While these innovations are already widely exploited in industrial maintenance, their potential in the construction sector remains to be demonstrated. They promise to help decision-making by providing access to specific information, via XR, during maintenance operations, and by enabling behavioral simulations thanks to the DT. However, the growing complexity of installations, combined with the need to call on external expertise during maintenance operations, calls for a rethinking of remote assistance methods, particularly in the light of environmental and health concerns. To explore these challenges, our research work, based on an in-depth review of scientific and technological literature, focuses on exploiting these technologies to improve maintenance procedures. Firstly, a literature review explored how XR tools and digital twins can enrich the information used during maintenance operations. This analysis highlights the value of leveraging BIM (Building Information Modeling) data to create a digital twin, as well as the improvements XR tools bring to the visualization of this data. In addition, a study of existing collaboration solutions revealed the requirements and constraints inherent in collaborative work between a field operation and a remote expert, such as the need for common work environment and difficulties in synchronizing exchanges. In a second phase of our research, based on these findings, we developed an architecture to enhance collaboration during inspections between an on-site operator and a remote expert, using the visualization capabilites of XR tools and data from the system’s digital twin. This led to the creation of the DT-RAMCoRE solution, enabling Information to be shared via indirect manipulation of the system’s digital twin usingthe RAMCoRE method. Aware of the diversity of XR devices and the rapid evolution of the technology, we designed this solution with the aim of ensuring its durability and interoperability between the different media available, thanks to the OpenXR standard. By analyzing a case study, we have demonstrated that using the DT-RAMCoREsolution during a collaborative inspection helps the operator to understand the information transmitted by an expert more quickly than with a conventional approach based on a video call, while reducing errors linked to the identification of system components. In conclusion, we formulate recommendations for optimizing the information provided to collaborative users. Finally, we have developed a simulation concept, a key component of the DT, to provide the field operator and the remote expert with advanced analysis tools to facilitate inspection work. As a perspective to this work, we present a methodology for exploiting DT simulation models via XR tools
Kherbache, Mehdi. „Toward Optimized 802.15.4 Industrial Wireless Networks : Harnessing Machine Learning and Digital Twins“. Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0253.
Der volle Inhalt der QuelleThe Industrial Internet of Things (IIoT) presents a complex landscape with numerous constraints, particularly due to their use to control critical applications in Industry 4.0. The requirements in such a context in terms of energy efficiency and quality of service (delay, reliability, determinism and robustness) are strict and of paramount importance. Consequently, there is a pressing need for sophisticated management mechanisms throughout their entire lifecycle to meet these needs. This thesis explores two technological fronts to address this challenge: Reinforcement Learning-based Time Slotted Channel Hopping (TSCH) scheduling and Network Digital Twin (NDT). TSCH scheduling in IIoT, is identified as a crucial area to optimize the performance of these networks. Several works proposed Reinforcement Learning-based scheduling techniques for TDMA (Time Division Multiple Access ) MAC protocols, and particularly for TSCH. However, using this approach in a constrained network like the IIoT carries the risk of elevated energy consumption. This is due to the continuous learning process and coordination among the nodes necessary to manage the non-stationarity issue in the network, which is viewed as a Multi-Agent System. This thesis introduces a novel Reinforcement Learning-based distributed scheduling algorithm, QL-TSCH-plus. This algorithm has been designed to be adaptive and efficient, with reduced energy consumption and delay targets inherent to IIoT environments. Parallel to the development of TSCH scheduling, this thesis adopts the concept of NDT as a viable solution for effective IIoT management. Digital twins have been increasingly used to optimize the performances of industrial systems. Capitalizing on this technology, a holistic NDT architecture for the IIoT is proposed, where the network is integrated with other industrial components. The architecture leverages Software Defined Networking to enable closed-loop network management across the entire network life-cycle (from design to service). This architecture enables quick validation of networking solutions in an industrial environment because of the continuous link between the NDT and the physical IIoT network. Moreover, we propose to model the IIoT in the NDT using Petri-nets, enabling data-driven Petri-nets. These serve as coarse-grained formal models enabling fast simulation time for what-if scenarios execution, and real-time fault detection that is crucial in mission-critical industrial applications
Rifi, Léah. „Digital twin-based decision support system for the prospective and the retrospective analysis of an operating room under uncertainties“. Electronic Thesis or Diss., Ecole nationale des Mines d'Albi-Carmaux, 2023. http://www.theses.fr/2023EMAC0020.
Der volle Inhalt der QuelleWith healthcare demand rising worldwide, hospital services are increasingly needed. Hospitals' performance is tightly linked to their surgical suite performance. Indeed, the surgical suite is an important revenue and expense center with over 40% of the hospital's budget dedicated to it (Macario et al. 1997) and 60% of the patient coming into the hospital for surgical intervention (Fugener et al. 2017). This makes it necessary for surgical suites to be efficient. However, running a profitable surgical suite is quite hard and requires a methodological approach due to the complexity of its functioning: the diversity of patient pathways, the multiplicity of professions, the tight link with upstream and downstream wards, the synchronization of several resources and logistic flows (drug and medical devices), etc. On the other hand, durations variability and disruptions inherent in medical care like emergency cases are the main factors and events that degrade the scheduled execution and involve the staff making decisions frequently to preserve the surgical suite activity in an optimal way. Therefore, OR planning and scheduling activities are of increasing interest to the scientific community. In this PhD thesis, we focus on offline operational and online operational levels (Hans and Vanberkel 2012). This leads us to the following research questions: (1) How can we assess the robustness and the resilience of the schedule before its execution (prospective way)? (2) How can we replay the schedule to have feedback and assess the decisions made during its execution (retrospective way)? The contribution of this manuscript is threefold: (1) we propose a digital twin-based decision support system for the prospective and retrospective simulation and analysis of the operating room schedule execution, (2) we describe a standardized methodology to conceive, build and implement this tool in any surgical suite, (3) This methodology is applied to an operating room inspired by the Private Hospital of La Baie (Vivalto Santé group, France), in order to have a proof of concept allowing to simulate an operating program prospectively and retrospectively
Nerlikar, Vivek. „Digital Twin in Structural Health Monitoring for Aerospace using Machine Learning“. Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPASG080.
Der volle Inhalt der QuelleModern engineering systems and structures often utilize a combination of materials such as metals, concrete, and composites, carefully optimized to achieve superior performance in their designated functions while also minimizing overall economic costs. Primarily, engineering structures are subjected to dynamic loads during their operational life. The manufacturing issues and/or the perpetual dynamic operations often lead to some changes into a system that adversely impact its present and/or future performance; these changes can be defined as damage. The identification of damage is a crucial process that ensures the smooth functioning of equipment or structures throughout their life cycle. It alerts the maintenance department to take the necessary measures for repair. Structural Health Monitoring (SHM) is a potential damage identification technique which has attracted more attention in the last few decades. It has the capability to overcome the downsides of traditional Non-Destructive Testing (NDT). In this thesis, we used Ultrasonic Guided Waves (GW) technique for SHM. However, sensitivity of GW to Environmental and Operational Conditions (EOC) modify the response signals to mask defect signatures. This makes it difficult to isolate defect signatures using methods such as baseline comparison, where damage-free GW signals are compared with current acquisitions Baseline-free methods can be an alternative, but they are limited to simple geometries. Moreover, high sensitivity of GW to EOC and measurement noise poses a challenge in modelling GW through physics-based models. The recent advancements in Machine Learning (ML) has created a new modelling axis, including data-driven modelling and physics-based modelling, often referred to as Scientific ML. Data-driven modelling is extremely helpful to model the phenomena that cannot be explained by physics, allowing for the isolation of subtle defect signatures and the development of robust damage detection procedures. However, ML-based methods require more data to capture all the information to enhance the generalization capability of ML models. SHM, on the other hand, tends to generate mostly damage-free data, as damage episodes seldom occur. This particular gap can be filled through physics-based modeling. In this approach, the modeling capabilities of physics-based models are combined with measurement data to explain unexplainable phenomena using ML. The primary objective of this thesis is to develop a data-driven damage detection methodology for identifying defects in composite panels. This methodology is designed for monitoring similar structures, such as wind or jet turbine blades, without requiring pristine (damage-free) states of all structures, thereby avoiding the need for direct baseline comparisons. The second goal is to develop a physics-based ML model for integrating physics-based simulations with experimental data within the context of a Digital Twin. The development of this physics-based ML model involves multi-fidelity modeling and surrogate modeling. To validate this model, we utilize an experimental and simulation dataset of an Aluminium panel. Furthermore, the developed model is employed to generate realistic GW responses at the required damage size and sensor path. These generated signals are then used to compute a Probability of Detection (POD) curve, assessing the reliability of a GW-based SHM system
Hosni, Houssem. „Conception d’un jumeau numérique pour un procédé d’aspiration industrielle“. Electronic Thesis or Diss., La Rochelle, 2022. http://www.theses.fr/2022LAROS031.
Der volle Inhalt der QuelleThis thesis is devoted to the design of a digital twin for industrial ventilation systems in a monitoring and diagnostic context. The input measurements of the model are exclusively electrical and no mechanical sensors are used. The particular cases of fixed and variable speed are studied. At constant speed, the demodulation of electrical currents is particularly studied and an original algorithm, based on an orthogonal signal generator, is proposed, compared to the main known methods, and validated experimentally. At variable speed, the proposed approach is based on order tracking methods without mechanical sensor in which the analysis signals are sampled as a function of the mechanical angle. In this case, the spectral components become independent of the rotation speed and the frequency analysis can be exploited. An original method is presented. It is based on the definition of an observer from a reduced number of information on the considered motor. The estimated speed is used to deduce the mechanical position and to perform the angular resampling. A generalization of the concept of ordertracking is also presented, allowing to define resampling angles adapted to the monitored faults. This method is tested on a LIAS test bench and on the industrial ventilation process
Tchana, De Tchana Yvan. „Proposition d’un jumeau numérique pour soutenir la gestion de l'exploitation d'une infrastructure linéaire“. Thesis, Troyes, 2021. http://www.theses.fr/2021TROY0012.
Der volle Inhalt der QuelleThe digital growth of the construction industry led to BIM (Building Information Modeling). Developed for buildings, BIM is later used on linear infrastructure projects. Such projects require end-to-end control of information. PLM (Product Lifecycle Management) supports digital continuity in the manufacturing industry. Studies evaluate the relevance of a complementary use of the BIM and PLM approaches for linear infrastructure projects. With an adaptation of methods used for building construction, those studies are mostly restricted to the implementation of data repositories. This makes it difficult to consider the infrastructure post-construction phase, where the 3D model is no longer a digital model, but a digital twin. This research work consists in developing a strategy for the design, the implementation and the operations and maintenance of a linear infrastructure. The digital twin of the infrastructure is the target of our approach. It will take into consideration not only BIM and PLM methodologies, but also any other data source positioning the infrastructure in its geographical environment. Data aggregator, our digital twin should make it possible to manage the lifecycle of a linear infrastructure. This system is tested on a specific linear infrastructure, a level crossing. Digital continuity and data traceability are important factors for those constructions. Through the digital twin, our proposal helps to follow the data, and thus to link operational data to the design and construction data of the linear infrastructure
Buchteile zum Thema "Jumeaux numériques"
HADDADOU, Kamel, und Guy PUJOLLE. „L’IA pour le Cloud et l’Edge Networking“. In Cloud et Edge Networking, 221–38. ISTE Group, 2024. http://dx.doi.org/10.51926/iste.9128.ch13.
Der volle Inhalt der QuelleROXIN, Ana, Christophe CASTAING und Charles-Édouard TOLMER. „Structurer l’information pour le jumeau numérique“. In Le BIM, nouvel art de construire, 89–105. ISTE Group, 2023. http://dx.doi.org/10.51926/iste.9110.ch4.
Der volle Inhalt der Quelle„Bibliographie“. In Le jumeau numérique, 227–29. Dunod, 2020. http://dx.doi.org/10.3917/dunod.julie.2020.01.0227.
Der volle Inhalt der QuelleKonferenzberichte zum Thema "Jumeaux numériques"
GIRAUDEL, Cyril, Steven LE BARS, Alberto GUTIERREZ, Timothée LAUNEY und Vincent MACAIGNE. „Méthode innovante d’inspection des carapaces de digues par l’utilisation de jumeaux numériques – retour d’expérience de deux chantiers“. In Journées Nationales Génie Côtier - Génie Civil. Editions Paralia, 2022. http://dx.doi.org/10.5150/jngcgc.2022.061.
Der volle Inhalt der QuelleVaré, Christophe. „Le jumeau numérique GV : pronostic de la DDV du GV“. In Poursuivre le fonctionnement des réacteurs nucléaires après 40 ans. Les Ulis, France: EDP Sciences, 2019. http://dx.doi.org/10.1051/jtsfen/2019pou10.
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