Relevant bibliographies by topics / Optimisation de concepts multidisciplinaires

Academic literature on the topic 'Optimisation de concepts multidisciplinaires'

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Published: 7 July 2024

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Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Journal articles on the topic "Optimisation de concepts multidisciplinaires":

1

Kupper, Danièle, Jean-Paul Gallice, Denis Rentsch, Vincent Barthassat, Christine Cedraschi, and Stéphane Genevay. "Programmes multidisciplinaires et lombalgies chroniques : concepts et aspects pratiques." Kinésithérapie, la Revue 10, no. 102 (June 2010): 35–39. http://dx.doi.org/10.1016/s1779-0123(10)74858-0.

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Gallice, Jean-Paul, Danièle Kupper, Denis Rentsch, Vincent Barthassat, Christine Cedraschi, and Stéphane Genevay. "Programmes multidisciplinaires et lombalgies chroniques : concepts et aspects pratiques." Kinésithérapie, la Revue 10, no. 102 (June 2010): 40–44. http://dx.doi.org/10.1016/s1779-0123(10)74859-2.

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Steinke, Hetzer, and Demartines. "Stuhlinkontinenz: Abklärung, Behandlungskonzept und neue Therapieansätze." Praxis 91, no. 42 (October 1, 2002): 1733–40. http://dx.doi.org/10.1024/0369-8394.91.42.1733.

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L'incontinence des selles est un problème qui entraine un isolement social et dont la fréquence est sous-estimée parce que les patients n'en parlent que trop peu souvent. De nouvelles méthodes d'investigations multidisciplinaires, comme par exemple la défécographie par IRM, ont amélioré de façon considérable le diagnostic et ainsi que la connaissance pathophysiologique. Grâce à de nouveaux concepts thérapeutiques et de nouvelles techniques, il est souvent possible de guérir l'incontinence ou, au moins, d'en améliorer les symptômes de façon considérable. Des développements modernes comme par exemple la stimulation nerveuse sacrale ont ouvert de nouvelles voies thérapeutiques prometteuses. Ce travail présente une revue des causes, des étapes diagnostiques ainsi que des possibilités d'une approche conservatrice et chirurgicale de l'incontinence des selles.
4

Bouvy, Claude, and Klaus Lucas. "Multicriterial optimisation of communal energy supply concepts." Energy Conversion and Management 48, no. 11 (November 2007): 2827–35. http://dx.doi.org/10.1016/j.enconman.2007.06.046.

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Jordan, V. Craig. "Optimisation of antioestrogen therapy: laboratory and clinical concepts." Proceedings of the Royal Society of Edinburgh. Section B. Biological Sciences 95 (1989): 239–46. http://dx.doi.org/10.1017/s026972700001071x.

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SynopsisTamoxifen, a non-steroidal antioestrogen, is the first line endocrine therapy for breast cancer. Laboratory studies during the past decade have provided valuable clues to understand the mode of action of tamoxifen so that the drug can be used to its best advantage in the clinic. Animal models (carcinogen-induced rat mammary carcinoma models, spontaneous mouse mammary tumours, and athymic mice inoculated with hormone-dependent human breast cancer cell lines) all demonstrate that tamoxifen is a tumouristatic agent and long-term or indefinite therapy is required to prevent the appearance of tumours. However, when treatment is stopped, tumours appear spontaneously or can be encouraged to re-appear with oestrogen therapy. These data clearly support the view that adjuvant clinical trials with tamoxifen should employ an indefinite treatment policy or at least until the time of treatment failure. Several clinical trials organisations in Great Britain (CRC and Scottish trial) have recruited a significant number of premenopausal patients. However, unlike postmenopausal patients, long-term tamoxifen therapy of premenopausal women often causes an increase in circulating oestrogen. Since tamoxifen has been shown to be a competitive inhibitor of oestrogen action, strategies to reduce ovarian steroidogenesis (oophorectomy or Zodalex®) may provide an optimal environment to sustain the long-term effectiveness of adjuvant tamoxifen therapy.
6

Hancock, Kathleen L. "Freight transport and distribution: concepts and optimisation models." Transport Reviews 39, no. 4 (June 12, 2018): 555–56. http://dx.doi.org/10.1080/01441647.2018.1487476.

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Chauvin, N., R. J. M. Konings, and Hj Matzke. "Optimisation of inert matrix fuel concepts for americium transmutation." Journal of Nuclear Materials 274, no. 1-2 (August 1999): 105–11. http://dx.doi.org/10.1016/s0022-3115(99)00078-1.

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Jin, S. L., D. Gruber, H. Harmuth, J. Soudier, P. Meunier, and H. Lemaistre. "Optimisation of monolithic lining concepts of channel induction furnace." International Journal of Cast Metals Research 27, no. 6 (April 14, 2014): 336–40. http://dx.doi.org/10.1179/1743133614y.0000000111.

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McDonald, Robert A., Brian J. German, T. Takahashi, C. Bil, W. Anemaat, A. Chaput, R. Vos, and N. Harrison. "Future aircraft concepts and design methods." Aeronautical Journal 126, no. 1295 (December 6, 2021): 92–124. http://dx.doi.org/10.1017/aer.2021.110.

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AbstractWith an annual growth in travel demand of about 5% globally, managing the environmental impact is a challenge. In 2019, the International Civil Aviation Organisation (ICAO) issued emission reduction targets, including well-to-wake greenhouse gas (GHG) emissions reduced at least 50% from 2005 levels by 2050. This discusses several technologies from an aircraft design perspective that can contribute to achieving these targets. One thing is certain: aircraft will look different in the future. The Transonic Truss-Braced Wing and Flying V configurations are promising significant efficiency improvements over conventional configurations. Electric propulsion, in various architectures, is becoming a feasible option for general aviation and commuter aircraft. It will be a growing field of aviation with zero-emissions flight and opportunities for special missions. Lastly, this paper discusses methods and design processes that include all relevant disciplines to ensure that the aircraft is optimised as a complete system. While empirical methods are essential for initial design, Multidisciplinary Design Optimisation (MDO) incorporates models and simulations integrated in an optimisation environment to capture critical trade-offs. Concurrent design places domain experts in one site to facilitate collaboration, interaction, and joint decision-making, and to ensure all disciplines are equally considered. It is supported by a Collaborative Design Facility (CDF), an information technology facility with connected hardware and software tools for design analysis.
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Dattoma, V., M. De Giorgi, S. Giancane, P. Manco, and A. E. Morabito. "A parametric–associative modelling of aeronautical concepts for structural optimisation." Advances in Engineering Software 50 (August 2012): 97–109. http://dx.doi.org/10.1016/j.advengsoft.2012.02.007.

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Journal articles Dissertations / Theses Books

Dissertations / Theses on the topic "Optimisation de concepts multidisciplinaires":

1

Saves, Paul. "High dimensional multidisciplinary design optimization for eco-design aircraft." Electronic Thesis or Diss., Toulouse, ISAE, 2024. http://www.theses.fr/2024ESAE0002.

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De nos jours, un intérêt significatif et croissant pour améliorer les processus de conception de véhicules s'observe dans le domaine de l'optimisation multidisciplinaire grâce au développement de nouveaux outils et de nouvelles techniques. Concrètement, en conception aérostructure, les variables aérodynamiques et structurelles s'influencent mutuellement et ont un effet conjoint sur des quantités d'intérêt telles que le poids ou la consommation de carburant. L'optimisation multidisciplinaire se présente alors comme un outil puissant pouvant effectuer des compromis interdisciplinaires.Dans le cadre de la conception aéronautique, le processus multidisciplinaire implique généralement des variables de conception mixtes, continues et catégorielles. Par exemple, la taille des pièces structurelles d'un avion peut être décrite à l'aide de variables continues, le nombre de panneaux est associé à un entier et la liste des sections transverses ou le choix des matériaux correspondent à des choix catégoriels. L'objectif de cette thèse est de proposer une approche efficace pour optimiser un modèle multidisciplinaire boîte noire lorsque le problème d'optimisation est contraint et implique un grand nombre de variables de conception mixtes (typiquement 100 variables). L'approche d'optimisation bayésienne utilisée consiste en un enrichissement séquentiel adaptatif d'un métamodèle pour approcher l'optimum de la fonction objectif tout en respectant les contraintes.Les modèles de substitution par processus gaussiens sont parmi les plus utilisés dans les problèmes d'ingénierie pour remplacer des modèles haute fidélité coûteux en temps de calcul. L'optimisation globale efficace est une méthode heuristique d'optimisation bayésienne conçue pour la résolution globale de problèmes d'optimisation coûteux à évaluer permettant d'obtenir des résultats de bonne qualité rapidement. Cependant, comme toute autre méthode d'optimisation globale, elle souffre du fléau de la dimension, ce qui signifie que ses performances sont satisfaisantes pour les problèmes de faible dimension, mais se détériorent rapidement à mesure que la dimension de l'espace de recherche augmente. Ceci est d'autant plus vrai que les problèmes de conception de systèmes complexes intègrent à la fois des variables continues et catégorielles, augmentant encore la taille de l'espace de recherche. Dans cette thèse, nous proposons des méthodes pour réduire de manière significative le nombre de variables de conception comme, par exemple, des techniques d'apprentissage actif telles que la régression par moindres carrés partiels. Ainsi, ce travail adapte l'optimisation bayésienne aux variables discrètes et à la grande dimension pour réduire le nombre d'évaluations lors de l'optimisation de concepts d'avions innovants moins polluants comme la configuration hybride électrique "DRAGON"
Nowadays, there has been significant and growing interest in improving the efficiency of vehicle design processes through the development of tools and techniques in the field of multidisciplinary design optimization (MDO). In fact, when optimizing both the aerodynamics and structures, one needs to consider the effect of the aerodynamic shape variables and structural sizing variables on the weight which also affects the fuel consumption. MDO arises as a powerful tool that can perform this trade-off automatically. The objective of the Ph. D project is to propose an efficient approach for solving an aero-structural wing optimization process at the conceptual design level. The latter is formulated as a constrained optimization problem that involves a large number of design variables (typically 700 variables). The targeted optimization approach is based on a sequential enrichment (typically efficient global optimization (EGO)), using an adaptive surrogate model. Kriging surrogate models are one of the most widely used in engineering problems to substitute time-consuming high fidelity models. EGO is a heuristic method, designed for the solution of global optimization problems that has performed well in terms of quality of the solution computed. However, like any other method for global optimization, EGO suffers from the curse of dimensionality, meaning that its performance is satisfactory on lower dimensional problems, but deteriorates as the dimensionality of the optimization search space increases. For realistic aircraft wing design problems, the typical size of the design variables exceeds 700 and, thus, trying to solve directly the problems using EGO is ruled out. In practical test cases, high dimensional MDO problems may possess a lower intrinsic dimensionality, which can be exploited for optimization. In this context, a feature mapping can then be used to map the original high dimensional design variable onto a sufficiently small design space. Most of the existing approaches in the literature use random linear mapping to reduce the dimension, sometimes active learning is used to build this linear embedding. Generalizations to non-linear subspaces are also proposed using the so-called variational autoencoder. For instance, a composition of Gaussian processes (GP), referred as deep GP, can be very useful. In this PhD thesis, we will investigate efficient parameterization tools to significantly reduce the number of design variables by using active learning technics. An extension of the method could be also proposed to handle mixed continuous and categorical inputs using some previous works on low dimensional problems. Practical implementations within the OpenMDAO framework (an open source MDO framework developed by NASA) are expected
2

Othmani, Imed. "Optimisation multicritère : fondements et concepts." Phd thesis, Université Joseph Fourier (Grenoble), 1998. http://tel.archives-ouvertes.fr/tel-00004900.

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L'optimisation multicritère consiste à choisir, en présence de critères multiples, une (des) alternative(s) parmi un nombre infini d'alternatives qui varient généralement dans un domaine continu. Depuis une trentaine d'années, le domaine de l'optimisation multicritère connaît une évolution importante. Cette évolution s'est traduite par le développement d'un grand nombre de méthodes. La multitude des méthodes d'optimisation multicritère est perçue comme une richesse incontestable de ce domaine. D'ailleurs, certains la justifient par la diversité des problèmes ainsi que par l'existence de différentes approches de résolution possibles et légitimes de ces problèmes. Cependant, ce phénomène révèle aussi des faiblesses certaines. En effet, la plupart de ces méthodes manquent de fondements axiomatisés, et il est difficile de choisir la méthode à appliquer face à une situation donnée. Le travail présenté dans ce mémoire propose une approche axiomatisée d'optimisation multicritère. Cette approche est fondée sur des concepts tels que l'efficacité partielle qui sont motivés et justifiés par des interprétation intelligibles. Elle est Robuste par rapport aux paramètres utilisés, opérationnelle, et évolutive. Elle peut être utilisée dans la résolution de différentes situations multicritères tels que les problèmes comportant des critères nombreux et incommensurables et les problèmes de décisions publiques.
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Ooi, Beng Lee. "Optimisation and frequency tuning concepts for a vibration energy harvester." Thesis, University of Hull, 2010. http://hydra.hull.ac.uk/resources/hull:4472.

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With current electronic designs becoming more versatile and mobile, applications that were wired and bulky before have now seen a great reduction in size and increase in portability. However, the issue is that the scaling down in size and cost of electronics has far outpaced the scaling up of energy density in batteries. Therefore, a great deal of research has been carried out to search for alternative power sources that can replace or enhance the conventional battery. Energy harvesting (also known as energy scavenging) is the process whereby ambient energy is captured and stored. The ambient energy here refers to energy that is pre-existing in nature, and is self-regenerating and has extended life time from a battery. After reviewing many possible energy scavenging methods, the conversion of ambient vibrations to electricity is chosen as a method for further research. There are plenty of different methods to transform ambient vibration to electricity, but in this research only piezoelectric and electromagnetic conversions are pursued. In order to harvest the most energy with the harvesting device, the harvester’s fundamental mode must be excited. However, this is not always possible due to fluctuations in the frequency of the vibration source. By being able to change the natural frequencies of the device, the harvester could be more effective in capturing ambient energy. In this thesis, the behaviour of the various types of energy sources is studied and the obtained information is later used to generate a vibration signal for subsequent simulation and experiments. A converter based on a piezoelectric bimorph is investigated. The resultant outputs from the design are compared to the model and the analysis is presented. The mechanical strain distributions on the beam’s surface for five different geometric structures are compared and discussed. This is followed by a discussion of the feasibility of improving the strain distribution by changing the beam’s depth (height) along the cantilever beam length. Lastly, a novel frequency tuning method, which involves applying a different effective electrical damping in different quadrants of the oscillating cycle, is proposed. The results of this analysis are presented, along with experimental results that indicate that the behaviour of the system can be changed over a limited range by changing the effective electrical damping during the oscillation cycle.
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Vilardaga, García-Cascón Santi. "An integrated framework for trajectory optimisation, prediction and parameter estimation for advanced aircraft separation concepts." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/668090.

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Since the birth of commercial aviation, the applications and benefits of aircraft have grown immensely. This, in perfect synchrony with the average increase of purchasing power of the society, has rocketed the number of aircraft flying the skies. This increase comes at a cost, both in environmental and airspace capacity aspects. This thesis works towards the alleviation of the issues caused by the high number of flights, proposing concepts and mechanisms to safely increase the airspace capacity whilst minimising the environmental impact of aviation. This incredibly complex and neverending pursuit is omnipresent in the literature. One promising topic is the four dimensional (4D) trajectory optimisation with higher levels of automation. The research in this PhD thesis proposes an integrated framework for trajectory optimisation, trajectory prediction and parameter estimation, with which new air traffic management concepts can be assessed. This framework has the flexibility to optimise trajectories ranging from a free-flight to a very strict route structure, from a complete freedom at the vertical profile to a specific adherence to flight levels, etc. The 4D optimisation strategy results in a trajectory that complies with the scenario characteristics, which minimises a given functional objective such as the operational cost, time, fuel, etc. Furthermore, the same framework is used in a novel strategy to perform adaptive trajectory prediction (with conformance monitoring), and to estimate unknown parameters of an aircraft. To resolve this problem, an optimal control problem is formulated and converted into a non-linear programming (NLP) problem with direct collocation methods, and numerically resolved by an NLP solver. A comprehensive software architecture is presented, taking benefit from the best of two worlds to enable the flexibility and genericity of the developed optimisation framework: an object-oriented software coding language (C++) and a very powerful algebraic modelling language (GAMS). Based on this optimisation framework, the thesis produces operationally relevant results, demonstrating that the framework can cope with a variety of problems, and contributing to the ultimate goal of safely increasing airspace capacity and air traffic efficiency. Illustrative examples are presented focussed on the departure phase within a terminal manoeuvring area. First, an assessment of the efficiency of required times of arrival as a ways to increase air traffic capacity is presented, providing results on the cost in terms of fuel and time of imposing these time requirements within a TMA (which can get to surprisingly low figures), and its effectiveness for traffic separation. Second, the implementation of an aircraft separation methodology is presented, where an intruder trajectory is predicted and the ownship calculates its own optimal trajectory that deviates from it. A conformance monitoring strategy is implemented to ensure that the separation is maintained throughout the flight, acknowledging deviations, and reacting accordingly. Third, the prediction of the intruder trajectory is enhanced by the estimation of an equivalent mass using known past states. An impressive accuracy is achieved early after the beginning of the flight. Finally, the implementation of a multi-aircraft separation strategy is presented, where multiple aircraft are simultaneously optimised in the same optimisation problem, all whilst maintaining separation between them. The complexity of the alignment of aircraft coordinates for a fair comparison is tackled from a novel perspective. Conclusively, the different strategies for aircraft separation are compared, and quite surprisingly the best results for each strategy are quite similar. Indeed, the increase in operational cost that the different strategies present (when compared to the individual optimal trajectory) is negligible and alledgedly better than the current air traffic control separation paradigm.
Des del naixement de l’aviació comercial, les aplicacions i beneficis dels avions han crescut immensament. Això, en perfecta sincronia amb l’augment mitjà del poder adquisitiu de la societat, ha augmentat el nombre d’avions que volen pel cel. Aquest augment comporta, tanmateix, un cost, tant en aspectes mediambientals com en la capacitat de l’espai aeri. Aquesta tesi és concebuda per treballar en l’alleujament dels problemes que resulten de l’elevat nombre de vols, proposant nous conceptes i mecanismes per augmentar la capacitat de l’espai aeri amb seguretat i alhora minimitzar l’impacte ambiental de l’aviació. Aquesta recerca, complexa però extremadament necessària, és la protagonista d’una gran quantitat de treballs científics publicats. Des de la propulsió, fins a les aerostructures i la gestió del transit aeri, avui en dia es dedica un gran esforç a la reducció de l’impacte ambiental, així com a l’augment de la seguretat i la capacitat de l’espai aeri. Un tema prometedor és la introducció de nous conceptes d’operació que aprofiten al màxim l’optimització de trajectòries en les quatre dimensions (4D) i nivells d’automatització més elevats, tant per a sistemes de bord com de terra. Conceptes com ara operacions de perfil vertical continu són cada cop més utilitzats en el dia a dia. També, la reducció de la distancia recorreguda dels avions mitjançant rutes més directes esdevé una realitat com més va més evident. Per tal d’abastar un àmbit més ampli, els sistemes embarcats i de terra hauran d’esser actualitzats. És per això que s’hauria d’explorar minuciosament la quantificació dels beneficis esperats per als nou conceptes que es proposin, abans d’introduir-los a escala local o global. La investigació d’aquesta tesi doctoral proposa un sistema integrat per a l’optimització de trajectòries, la predicció, i l’estimació de paràmetres, amb el qual es poden avaluar nous conceptes de gestió del trànsit aeri. Aquest sistema té la flexibilitat d’optimitzar trajectòries que van des d’un vol lliure (free-flight) fins a una estructura de ruta molt estricta, des d’una llibertat completa al perfil vertical fins a una adhesió especifica als nivells de vol, etc. La definició d’escenaris és prou genèrica com per permetre una àmplia varietat de tipologies de vol, fases de vol, fases de rendiment, restriccions al llarg de la trajectòria, entre molts altres aspectes. L’estratègia d’optimització 4D d´ona com a resultat una trajectòria que no només compleix les característiques del vol (i de l’entorn configurat), sinó que també minimitza un objectiu funcional determinat, com ara el cost operatiu, el temps, el combustible, etc. I com ja s’ha mencionat breument, aquesta mateixa estratègia d’optimització s’adapta lleugerament per presentar una innovadora estratègia per realitzar prediccions de trajectòria adaptativa (amb monitoratge de conformitat) i per estimar paràmetres crucials inicialment desconeguts d’un avió. Per resoldre un problema tan complex, es formula un problema de control òptim i es converteix en un problema de programació no lineal (NLP) amb mètodes de col·locació directa. Aquest problema es resol numèricament mitjançant un programari de resolució de problemes NLP i se n’extreuen els resultats per a l’anàlisi. Es presenta una arquitectura de programari integral, aprofitant el millor de dos mons: un llenguatge de programació orientat a objectes (C++) i un llenguatge matemàtic algèbric molt potent (GAMS). La interacció entre aquests dos mons permet la flexibilitat i la genericitat del sistema d’optimització desenvolupat A partir d’aquest sistema d’optimització, els diferents capítols de la tesi produeixen resultats operatius rellevants. Això no només demostra que el sistema pot fer front a una gran varietat de problemes, sinó que també contribueix a l’objectiu final d’augmentar de forma segura la capacitat de l’espai aeri i l’eficiència del transit aeri. Es presenten diferents casos d’ ´ us i exemples il·lustratius centrats en enlairaments dins l’àrea de maniobra terminal (TMA). Concretament, quatre etapes formen aquesta part de la tesi. Primer, es presenta una avaluació de l’eficiència dels temps requerits d’arribada (RTA) com a forma d’augmentar la capacitat del transit aeri. Aquest estudi proporciona resultats sobre el cost en termes de combustible i temps d’imposar aquests requisits de temps dins d’una TMA (que pot arribar a xifres sorprenentment baixes). A més, mostra com d’efectiva pot ser aquesta estratègia per a la separació del transit. En segon lloc, es presenta la implementació d’una metodologia de separació d’avions mitjançant el sistema d’optimització. En ella, una aeronau (l’aeronau) genera una predicció de trajectòria d’un avio extern amb qui preveu tenir un conflicte proper (l’intrús). Seguidament, l’aeronau calcula la seva pròpia trajectòria òptima que es desvia d’aquella predita de l’intrús. S’implementa una estratègia de control de la conformitat per assegurar que la separació es mantingui durant tot el vol, reconeixent les desviacions i reaccionant en conseqüència. En tercer lloc, la predicció de la trajectòria intrusa es veu millorada per l’estimació d’una massa equivalent mitjançant estats passats coneguts (el deixant). Com era d’esperar, com més llarg sigui aquest deixant, millor serà l’estimació de la massa. Tanmateix, s’aconsegueix una precisió impressionant molt poc després de l’inici del vol. Finalment, es presenta la implementació d’una estratègia de separació de múltiples aeronaus. En aquesta formulació, s’optimitzen simultàniament les trajectòries de diversos avions dins el mateix problema d’optimització, mantenint la separació entre ells. La complexitat de l’alineació temporal de les coordenades d’avions per a una comparació justa s’aborda des d’una perspectiva innovadora. En conclusió, es comparen les diferents estratègies de separació d’avions i, sorprenentment, els millors resultats de cada estratègia són força similars. De fet, l’augment del cost operatiu que presenten les diferents estratègies (en comparació amb la trajectòria òptima individual) és insignificant i sempre millor que el paradigma actual de separació del control de trànsit aeri.
5

Wennberg, David. "Multi-Functional Composite Design Concepts for Rail Vehicle Car Bodies." Doctoral thesis, KTH, Järnvägsgruppen, JVG, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-122391.

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Structures and material combinations, tailored for multiple purposes, are within the reach of vehicle manufacturers. Besides reducing the environmental impact of the transportation sector these multi-functional structures can reduce costs, such as development, manufacturing and maintenance, and at the same time offer improved comfort to the passengers. This thesis sets out to develop multi-functional design algorithms and evaluate concepts for future composite high speed train car bodies with the objective of optimising the amount of mass needed to fulfil all functions of the structure. In a first step complete composite car bodies were developed, optimised and evaluated based on global stiffness requirements and load cases. The knowledge gained in this step was used as requirements for the strength and stiffness of panels during the continued development of the multi-functional optimisation which, besides strength and stiffness, later also considers sound transmission, thermal insulation, geometric restrictions, manufacturability and fire safety. To be able to include fire safety in the analysis, a method for simulating the high temperature response of layered composite structures was needed, and developed. Significant weight reductions are proven when utilising carbon fibre in the load carrying structure of the vehicle, on component level as high as 60%. Structures can be made significantly thinner when using the algorithms developed in this thesis and wall thickness is reduced by 5-6 cm. Analysis carried out and extensive literature surveys also suggest significant cost savings in manufacturing, maintenance and use-phase, even thou the raw material cost can be significantly higher as compared to the conventional steel or aluminium alternatives. Results from drive cycle simulations showed that the benefit, with respect to reduced energy consumption, is in the range of 0.5-0.8% per reduced weight percentage, comparable to both automotive and air applications. The algorithms and methods established in this thesis can be directly applied for the development and analysis of future high speed train car bodies.

QC 20130521

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Eißner, Tobias [Verfasser]. "The new PWO crystal generation and concepts for the performance optimisation of the PANDA EMC / Tobias Eißner." Gießen : Universitätsbibliothek, 2013. http://d-nb.info/1068874198/34.

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Alix, Guillaume Champoussin Jean-Claude. "Comparaison de concepts de moteur diesel en vue de leur hybridation Bilan des émissions de Co2 suuivant l'usage en véhicule /." Ecully : Ecole Centrale de Lyon, 2008. http://bibli.ec-lyon.fr/exl-doc/galix.pdf.

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Gosselin, Émilie. "Optimisation des soins de santé par l'application de concepts Lean à Domrémy Mauricie/Centre-Du-Québec centre de réadaptaion en dépendance." Thèse, Université du Québec à Trois-Rivières, 2013. http://depot-e.uqtr.ca/6872/1/030466632.pdf.

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Rached, Rabih Pla Fernand. "Mise au point de nouveaux outils et de concepts de modélisation et d'optimisation pour l'élaboration anionique par extrusion réactive de matériaux macromoléculaires multiphasés et nanostructurés à base de polyamides." Vandoeuvre-les-Nancy : INPL, 2005. http://www.scd.inpl-nancy.fr/theses/2005_RACHED_R.pdf.

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Abo, Al-Kheer Abd Al-Kareem. "Intégration des concepts d'optimisation et de fiabilité dans la conception des machines agricoles." Phd thesis, INSA de Rouen, 2010. http://tel.archives-ouvertes.fr/tel-00563690.

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Les machines agricoles doivent être conçues pour être optimales, fiables et résistantes à la rupture par fatigue. L'approche déterministe de la conception ne garantit pas ces exigences, elle est néanmoins traditionnellement appliquée pour la conception de machines agricoles. Cela est dû à la difficulté de modéliser la nature stochastique des forces agissant sur les machines agricoles, en particulier les machines de labour, car elles fonctionnent dans un environnement irrégulier et dans des conditions de fonctionnement variables. Le principal objectif de cette thèse est de développer un cadre général pour la conception de machines agricoles, en intégrant les outils d'optimisation, de fiabilité et de fatigue. En cela, nous visons à proposer une alternative à l'approche déterministe. Tout d'abord, cette thèse propose des méthodes et des modèles pour modéliser la variabilité des forces durant le labour en prenant en compte à la fois la variabilité des paramètres du système de labour et de rupture du sol. Deuxièmement, sur la base des méthodes d'optimisation fiabiliste et d'analyse de la fatigue, nous proposons des méthodologies pour la conception de machines agricoles. Tout au long de la thèse, les approches développées sont appliquées à la conception de la dent d'un chisel.
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Books on the topic "Optimisation de concepts multidisciplinaires":

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Michael, Affenzeller, ed. Genetic algorithms and genetic programming: Modern concepts and practical applications. Boca Raton: Chapman & Hall/CRC, 2009.

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Bektas, Tolga. Freight Transport and Distribution: Concepts and Optimisation Models. Taylor & Francis Group, 2017.

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Bektas, Tolga. Freight Transport and Distribution: Concepts and Optimisation Models. Taylor & Francis Group, 2017.

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Bektas, Tolga. Freight Transport and Distribution: Concepts and Optimisation Models. Taylor & Francis Group, 2017.

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Bektas, Tolga. Freight Transport and Distribution: Concepts and Optimisation Models. Taylor & Francis Group, 2017.

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Bektas, Tolga. Freight Transport and Distribution: Concepts and Optimisation Models. Taylor & Francis Group, 2017.

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Bektas, Tolga. Freight Transport and Distribution: Concepts and Optimisation Models. Taylor & Francis Group, 2019.

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Miclet, Laurent, Yves Kodratoff, Antoine Cornuéjols, and Tom Mitchell. Apprentissage artificiel : Concepts et algorithmes. Eyrolles, 2002.

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Wagner, Stefan, Michael Affenzeller, Stephan Winkler, and Andreas Beham. Genetic Algorithms and Genetic Programming: Modern Concepts and Practical Applications. Taylor & Francis Group, 2009.

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Wagner, Stefan, Michael Affenzeller, Stephan Winkler, and Andreas Beham. Genetic Algorithms and Genetic Programming: Modern Concepts and Practical Applications. Taylor & Francis Group, 2018.

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Book chapters on the topic "Optimisation de concepts multidisciplinaires":

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Koychev, Ivan, and Robert Lothian. "Tracking Drifting Concepts by Time Window Optimisation." In Research and Development in Intelligent Systems XXII, 46–59. London: Springer London, 2006. http://dx.doi.org/10.1007/978-1-84628-226-3_5.

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Michelucci, Umberto. "Calculus and Optimisation for Machine Learning." In Fundamental Mathematical Concepts for Machine Learning in Science, 21–62. Cham: Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-56431-4_3.

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Noel, Guillaume, Karim Djouani, and Yskandar Hamam. "Optimisation-Based Image Grid Smoothing for SST Images." In Advanced Concepts for Intelligent Vision Systems, 227–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-17691-3_21.

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Gratzer, Alexander L., Alexander Schirrer, Sebastian Thormann, and Stefan Jakubek. "Platoon Control Concepts." In Energy-Efficient and Semi-automated Truck Platooning, 105–20. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-88682-0_8.

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AbstractCooperative platoon control strategies utilise provided information from vehicle-to-everything (V2X) communication to reduce energy consumption and improve traffic flow and safety. In this chapter, a distributed control concept for cooperative platooning is developed that combines trajectory optimisation and local model-predictive control of each vehicle. The presented control architecture ensures collision safety by design, platoon efficiency and situational awareness with the option of exploiting V2X communication. The resulting platoon control performance is tested and validated in a realistic setting by utilising a co-simulation-based validation framework with detailed vehicle dynamics.
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Gratzer, Alexander L., Alexander Schirrer, Sebastian Thormann, and Stefan Jakubek. "Platoon Control Concepts." In Energy-Efficient and Semi-automated Truck Platooning, 105–20. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-88682-0_8.

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AbstractCooperative platoon control strategies utilise provided information from vehicle-to-everything (V2X) communication to reduce energy consumption and improve traffic flow and safety. In this chapter, a distributed control concept for cooperative platooning is developed that combines trajectory optimisation and local model-predictive control of each vehicle. The presented control architecture ensures collision safety by design, platoon efficiency and situational awareness with the option of exploiting V2X communication. The resulting platoon control performance is tested and validated in a realistic setting by utilising a co-simulation-based validation framework with detailed vehicle dynamics.
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Poluha, Rolf G. "Innovative Concepts for Supply Chain Design and Optimisation." In The Quintessence of Supply Chain Management, 103–41. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-48515-6_4.

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Wang, D. N., and I. Petrounias. "Utilisation Organisational Concepts and Temporal Constraints for Workflow Optimisation." In Studies in Computational Intelligence, 19–42. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-77623-9_2.

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Shorin, Al, Georgy Gimel’farb, Patrice Delmas, and Patricia Riddle. "Constraint Optimisation for Robust Image Matching with Inhomogeneous Photometric Variations and Affine Noise." In Advanced Concepts for Intelligent Vision Systems, 476–87. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-17688-3_44.

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Kaveh, A. "Canonical Forms for Combinatorial Optimisation, Nodal Ordering and Graph Partitioning." In Optimal Analysis of Structures by Concepts of Symmetry and Regularity, 115–29. Vienna: Springer Vienna, 2013. http://dx.doi.org/10.1007/978-3-7091-1565-7_5.

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Stahl, Bernd Carsten. "Concepts of Ethics and Their Application to AI." In SpringerBriefs in Research and Innovation Governance, 19–33. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69978-9_3.

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AbstractAny discussion of the ethics of AI needs to be based on a sound understanding of the concept of ethics. This chapter therefore provides a brief overview of some of the key approaches to ethics with a particular emphasis on virtue ethics and the idea of human flourishing. The chapter reviews the purposes for which AI can be used, as these have a bearing on an ethical evaluation. Three main purposes are distinguished: AI forefficiency, optimisation and profit maximisation, AI forsocial control and AI for human flourishing. Given the focus on human flourishing in this book, several theoretical positions are introduced that provide insights into different aspects and ways of promoting human flourishing. The chapter concludes with a discussion of the currently widespread principle-based approach to AI ethics.

Conference papers on the topic "Optimisation de concepts multidisciplinaires":

1

Smith-Miles, Kate A. "Towards insightful algorithm selection for optimisation using meta-learning concepts." In 2008 IEEE International Joint Conference on Neural Networks (IJCNN 2008 - Hong Kong). IEEE, 2008. http://dx.doi.org/10.1109/ijcnn.2008.4634391.

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Wang, Adeline H., Rebecca Brown, Julia Bryant, and Sergio Leon-Saval. "Development and focal ratio degradation optimisation of integral field units on Hector." In UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts IX, edited by James B. Breckinridge, H. Philip Stahl, and Allison A. Barto. SPIE, 2019. http://dx.doi.org/10.1117/12.2529212.

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Schneeloch, Jana, and Mohamed Eldakadosi. "Impact of Size Optimisation on the Multi-Criteria Assessment of Local Cross-Sectoral Energy Supply Concepts." In 36th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2023). Las Palmas De Gran Canaria, Spain: ECOS 2023, 2023. http://dx.doi.org/10.52202/069564-0298.

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Herbert, Luke T., and Robin Sharp. "Optimisation of BPMN Business Models via Model Checking." In ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-13047.

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We present a framework for the optimisation of business processes modelled in the business process modelling language BPMN, which builds upon earlier work, where we developed a model checking based method for the analysis of BPMN models. We define a structure for expressing optimisation goals for synthesized BPMN components, based on probabilistic computation tree logic and real-valued reward structures of the BPMN model, allowing for the specification of complex quantitative goals. We here present a simple algorithm, inspired by concepts from evolutionary algorithms, which iteratively generates candidate improved processes based on the fittest of the previous generation. The evaluation of the fitness of each candidate in a generation is performed via model checking, detailed in previous work. At each iteration, this allows the determination of the precise numerical evaluation of the performance of a candidate in terms of the specified goals. A discussion of this method’s application, and the degree of optimization which is possible, is illustrated using an example drawn from the healthcare industry.
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Aliyev, Rezo. "Specifics of the Planning of Additive Manufacturing Processes." In 2nd International Scientific-Practical Conference "Machine Building and Energy: New Concepts and Technologies". Switzerland: Trans Tech Publications Ltd, 2024. http://dx.doi.org/10.4028/p-9xbdh3.

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This paper describes a new approach for planning additive manufacturing (AM) technology. Based on the technological heredity between the stages of the process chain, an optimisation method is proposed that makes it possible to minimise manufacturing costs under consideration of the quality requirements.
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Lin, Wei, Yinghui Tian, and Mark J. Cassidy. "A Preliminary Study on Design Optimisation of Submerged Floating Tunnels." In ASME 2023 42nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/omae2023-107918.

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Abstract This paper systematically studies the submerged floating tunnel, a concept initially proposed in the 19th century, only sporadically built, but possibly more viable potential in the future. The first part of this paper presents a literature review on submerged floating tunnel concepts with different design variables, where various type, plane alignment, cross-sections, tethers, and anchoring systems are discussed. Critical parameters for potential design are discussed, including submergence depth, Buoyancy-Weight-Ratio, and cross-section dimensions. The second part introduces an optimisation model of the complex engineering system of submerged floating tunnel, with a balanced approach to address appropriate type selection, weight balance consideration, structural deflection, tether capacity and slack prevention, and uplift/sliding stability of gravity type foundation taken. With given environmental parameters of water depth, crossing length, and wave/current characteristics, the optimal solution with minimum cost is obtained, with design variables including the tunnel’s outer and inner diameters, tether’s diameter and layout, and anchor mass optimised.
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Clemen, C., P. Albrecht, and S. Herzog. "Systematic Optimisation of a Turbofan Bypass Duct System." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-68276.

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A reduction of CO2 emissions of aero engines can only be achieved by a reduction in the fuel consumption. For turbofan engines a major key for this is an increase in the engine bypass ratio to enhance the propulsive efficiency. This leads to an increased mass flow in the bypass duct and hence higher contributions of the bypass duct system to the flow pressure losses and hence the engine fuel consumption. Additionally the turbofan core engine gets smaller in size and the overall diameter of the engine increases. This requires advanced engine mounting concepts, such as core mounted subsystems, which influence the arrangement and the mechanical and aerodynamic design of components in the bypass duct such as fan outlet guide vane, struts, fairings or bifurcations. This requires an optimized design of the turbofan bypass system with regards to structural, aerodynamic and acoustic criteria. The topology of the bypass duct as well as the position and the design of the individual components have a significant impact on the weight, the efficiency and the noise radiation of the engine and hence need to be investigated in a systematic approach. Such a design approach was developed in the R&T project OPAL, led by Rolls-Royce Deutschland and funded by the German Federal State of Brandenburg. The design approach covers the following steps: - Optimization of the bypass duct shape with regards to minimum pressure loss taking into consideration the mechanical requirements of an engine with core mounted subsystems. - Optimization of strut, fairing and bifurcation shapes with regards to minimum pressure loss, robustness against flow deviations and minimized upstream flow effects taking into consideration structural and mechanical requirements by engine loads and subsystem routings. - Optimization of fan outlet guide vane profile and plan form shape with regards to minimum pressure losses and maximum working range taking into consideration structural and acoustic constraints. - Optimization of fan-outlet guide vane, strut and bifurcation interaction with regards to minimum pressure losses and maximized aerodynamic stability of the fan and outlet guide vanes. The current paper will present the design approach, the optimization processes and the results of the optimization of the turbofan bypass duct system for the application on modern high-bypass ratio aero engines.
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Qiao, Geng, and George Barakos. "Verification and Optimisation of Distributed Propulsion Using High-Fidelity CFD Method." In Vertical Flight Society 79th Annual Forum & Technology Display. The Vertical Flight Society, 2023. http://dx.doi.org/10.4050/f-0079-2023-17986.

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This work presents CFD verifications and comparisons related to distributed propulsion concepts. The work started with validation studies using experimental data from the NASA Workshop for Integrated Propeller Prediction (WIPP) and the folding conformal high lift propeller (HLP) projects. The high fidelity CFD results from HMB3 for isolated and installed configurations at different forward flight speeds were compared with experiments. Expanding from that, the second part of the paper examined several configurations of propellers similar to the ones used in modern eVTOL designs to identify performance differences for propellers located at different positions around a lifting wing. Results from different methods show that distributed propellers with a small radius have much stronger interference with the lifting wing compared to the tip-mounted propeller. The interference also depends on the location of the propellers, with propellers placed ahead of the leading edge showing slightly better performance than propellers placed on top of the wing. However, both methods indicate that the wing's performance improved significantly after optimizing the propeller from a traditional tractor configuration to a novel over-wing configuration. More specifically, the fully resolved results show that the wing lift-to-drag ratio has totally increased by 69%.
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Tsotskas, Christos, and Malamati Louta. "Investigating the application of multi-objective optimisation and multi-criteria decision making to future concepts of intelligent mobility and telecommunications." In 2016 7th International Conference on Information, Intelligence, Systems & Applications (IISA). IEEE, 2016. http://dx.doi.org/10.1109/iisa.2016.7785390.

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Persky, Rodney, Emilie Sauret, and Lin Ma. "Optimisation Methods for Coupled Thermodynamic and 1D Design of Radial-Inflow Turbines." In ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fedsm2014-21665.

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Optimisation is a fundamental step in the turbine design process, especially in the development of non-classical designs of radial-inflow turbines working with high-density fluids in low-temperature Organic Rankine Cycles (ORCs). The present work discusses the simultaneous optimisation of the thermodynamic cycle and the one-dimensional design of radial-inflow turbines. In particular, the work describes the integration between a 1D meanline preliminary design code adapted to real gases and the performance estimation approach for radial-inflow turbines in an established ORC cycle analysis procedure. The optimisation approach is split in two distinct loops; the inner operates on the 1D design based on the parameters received from the outer loop, which optimises the thermodynamic cycle. The method uses parameters including brine flow rate, temperature and working fluid, shifting assumptions such as head and flow coefficients into the optimisation routine. The discussed design and optimisation method is then validated against published benchmark cases. Finally, using the same conditions, the coupled optimisation procedure is extended to the preliminary design of a radial-inflow turbine with R143a as working fluid in realistic geothermal conditions and compared against results from commercially-available software RITAL from Concepts-NREC.

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