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Auswahl der wissenschaftlichen Literatur zum Thema „Mécanisme de contact“
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Zeitschriftenartikel zum Thema "Mécanisme de contact"
Karroua, Mohamed, P. Grange und Bernard Delmon. „Preuve expérimentale de la nature biphasique des catalyseurs et du mécanisme de synergie par contact dans l'hydrodésulfuration“. Bulletin de la Classe des sciences 75, Nr. 1 (1989): 127–34. http://dx.doi.org/10.3406/barb.1989.57828.
Der volle Inhalt der QuelleZhang, Yi, Sébastien Gilbert und Dominique Regallet. „Essais et analyses géotechniques sur les argiles plastiques du Sparnacien du Bassin parisien“. Revue Française de Géotechnique, Nr. 170 (2022): 5. http://dx.doi.org/10.1051/geotech/2021030.
Der volle Inhalt der QuelleGillot, Timothée. „Mécanisme et facteurs de risque de lésion du LCA hors contact chez la joueuse de sport pivot : revue narrative“. Kinésithérapie, la Revue 18, Nr. 194 (Februar 2018): 40. http://dx.doi.org/10.1016/j.kine.2017.12.003.
Der volle Inhalt der QuelleD'Or, L., und A. Orzechowski. „Sur le mécanisme de l'hydrogénation du phénol en phase gazeuse au contact de catalyseurs mixtes nickel-oxyde de cérium“. Bulletin des Sociétés Chimiques Belges 62, Nr. 1-2 (01.09.2010): 138–52. http://dx.doi.org/10.1002/bscb.19530620119.
Der volle Inhalt der QuelleMekhalef Benhafsa, Fouad, Smail Kacha, Abdelkader Leboukh und Kumar Djamel Belaid. „Étude comparative de l’adsorption du colorant Victoria Bleu Basique à partir de solutions aqueuses sur du carton usagé et de la sciure de bois“. Revue des sciences de l’eau 31, Nr. 2 (03.10.2018): 109–26. http://dx.doi.org/10.7202/1051695ar.
Der volle Inhalt der QuelleBigay, Joëlle, Bruno Mesmin und Bruno Antonny. „Un marché d’échange de lipides“. médecine/sciences 36, Nr. 2 (Februar 2020): 130–36. http://dx.doi.org/10.1051/medsci/2020009.
Der volle Inhalt der QuelleMeltz, Renaud. „Associer et dissimuler. Les essais nucléaires en Polynésie française, un « deuxième contact » entre secret et mensonge“. Revue d’histoire moderne & contemporaine 72, Nr. 3 (05.09.2023): 88–116. http://dx.doi.org/10.3917/rhmc.703.0090.
Der volle Inhalt der QuelleBlondelot, S., und G. Taché. „Comportement des bétons en contact avec des milieux contenant des micro-organismes. Cas particulier du mécanisme d’attaque des bétons dans les réseaux d’assainissement“. Matériaux & Techniques 98, Nr. 1 (2010): 19–29. http://dx.doi.org/10.1051/mattech/2009050.
Der volle Inhalt der QuelleTahina Lalaina, Randrianantoandro, und Herizo Ramanantsoa. „Etude De Mécanisme d’Adsorption Du Colorant d’Indigo Carmin (IC) Sur Du Charbon Actif A Base De Coques De Noix De Coco (CACC)“. International Journal of Progressive Sciences and Technologies 39, Nr. 1 (20.06.2023): 127. http://dx.doi.org/10.52155/ijpsat.v39.1.5364.
Der volle Inhalt der QuelleFisette, Jean. „La représentation de la folie comme thérapie. À propos de Claude Gauvreau“. Dossier 18, Nr. 3 (30.08.2006): 468–82. http://dx.doi.org/10.7202/201044ar.
Der volle Inhalt der QuelleDissertationen zum Thema "Mécanisme de contact"
Moureau, Frédérique. „Biodégradation des polymères au contact des tissus : mécanisme et applications“. Paris 5, 1988. http://www.theses.fr/1988PA05P252.
Der volle Inhalt der QuelleCrozet, Martial. „Analyse tribologique du contact siège-soupape d'un moteur diesel“. Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI106.
Der volle Inhalt der QuelleWithin diesel engines, the valve-seat contact is one of the few non-lubricated contacts. Due to the lack of lubrication it is exposed to significant degradation. It is put in evidence by material removal at the intake valve. This material pull out is promoted by the replication of combustion cycles (500 million) and by severe operating conditions (pressure 18 MPa). The wear can possibly lead to gas leakage and to the engine failure. In this context, the target of this work was to understand degradation mechanisms of the valve-seat contact in order to identify parameters affecting its wear. To address this question, the chosen approach based on the tribological triplet and material flows within the contact involved a double numerical and experimental vision. A dynamic model and a valvetrain test bench showed that the wear flows could be activated by the architecture of the valve opening system. Therefore, the limitation of these flows is obtained by the control of the "global" geometry of the system and thus without modification of materials. In the same way, a finite element model focusing on the local response of the 1st bodies (seat-valve) made it possible to highlight the impact of the "local" geometry of the contact. The change of this geometry is a lever to limit shear stresses applied to 1st bodies which reduces the tearing of particles (internal source flow) and therefore wear. Finally, tests carried out on the engine and on a specifically adapted test bench made it possible to finalize the understanding of degradation mechanisms (source flow, wear flow ...). Morphological interpretations of worn surfaces in terms of material flows made it possible to understand the build up stages of a protective layer : the 3rd body (internal flow). One solution to promote this internal flow is the optimized use of pollutants from combustion. For example, the burned oil in contact (external source flow), which is a priori harmful, becomes an opportunity here. In the same way, un-burned hydrocarbons from the combustion of biodiesel help to protect the contact
Renault, Jean-Christophe. „Étude du mécanisme de dégradation du méthanol au contact du nickel dans le cadre d'une boucle fluide diphasique à pompage capillaire“. Thesis, Pau, 2017. http://www.theses.fr/2017PAUU3017/document.
Der volle Inhalt der QuelleIn the railway field the constraints on electric traction systems are such that these systems constitute a separate branch of electronics, called "power electronics". Furthermore, the needs for cooling these systems are increased by the presence of very high electrical currents flowing in these systems. An adaptation to the railway field of two-phase fluid capillary pumped loops, initially designed for space applications, could be an advantageous response to this cooling need. The capillary pumped loops are passive and modular heat transfer devices, characterized by their highly efficient and highly reliable behavior. The vaporization of the heat transfer fluid takes place in a porous wick, generating a pressure difference between the vapor and the liquid phase, allowing the setting in motion of the fluid throughout the system. They therefore operate without pump or any mechanical element to set the fluid in motion. Adaptations have been made by ALSTOM and EHP (Euro Heat Pipe) on these loops, leading to a prototype called "Capillary Pumped Loop for Integrated Power" (CPLIP). The goal of this PhD, in this context, is to study the chemical compatibility of methanol, which is the fluid used in the CPLIP, with the material of the CPLIP wick based on sintered nickel. Their compatibility will be mainly studied for temperatures higher than those currently encountered in the loop, to take into account the increase of operating temperature due to the development of silicon carbide in power electronics.Two test benches have been developed specifically for the study of the aging of a couple fluid/catalytic solid in contact. The first one is a batch reactor used to determine the reaction kinetics. A second test bench has been designed with the aim to partially reproduce the operating conditions of the CPLIP. Because of the constraints related to the study of the reaction including analysis of the chemical compounds, it was not possible to generate capillary pumping to the setting in motion of the fluid. A gravitational two-phase fluid loop has therefore been developed. Since the use of this process is quite complex, a part of this work is devoted to describe its thermal behavior, using experimental results as well as a simple numerical model. On these two test benches, a gas chromatograph was used to perform chemical analyzes. Surface characterization tests, using scanning electron microscopy, X-ray spectrophotometry and BET analyzes, provided a more accurate knowledge of the surface area of the sintered nickel. Analyzes were also carried out after reaction, in order to obtain more information on the evolution of the surface state during the reaction. Various tests were then carried out for different temperatures and particle sizes which allowed us to offer a degradation mechanism of methanol in contact with the nickel of the porous wick. Finally, first tests were carried out on the gravitational two-phase fluid loop in order to study the degradation of methanol under conditions representative to those encountered in industrial loops
Camolezi, Marcos Daniel. „La causalité chez Henri Bergson : formation d'une pensée au contact des sciences expérimentales“. Thesis, Paris 1, 2017. http://www.theses.fr/2017PA01H210.
Der volle Inhalt der QuelleThis thesis aims to understand the formation and the role of the causality concept in the philosophy of Henri Bergson (1859-1941 ), notably in the period from 1889 to 1907. Its first part is devoted to exposing the redefinition of causality concept within Time and Consciousness (1889). In this book, a set of statements were assumed by the philosopher so that causality in general becomes a sort of "psychological causality", particularly in order to question the importance of the concept of causality itself in determining the inner experience of time. It is our intent to underscore how this change is operated on a cautious philosophical basis. In the second part of this work, we try to disclose how Bergson abandons the path of the theory of knowledge on behalf of an ontology based on controversial physiological bases, notably regarding the idea of body, which the author presents in Matter and memory (1896). It is from the conceptual unfolding of a causality conceived as the "feeling of effort'' that we are concerned here. Finally, the third part of the thesis presents an overall reflection on the points of view mentioned above. In it, the relevance of the two causalities is highlighted by the analysis of an unpublished course by Georges Canguilhem, in which the problem of causality in Bergson's philosophy is valued according to the way in which we Il)' to understand and reveal it here. Thus, the discussion on the difficulties of material action may represent a prelude to the comprehension of the specificity of the problem of technical invention
Esta tese tem por objetivo compreender a formação e o papel do conceito de causalidade na filosofia de Henri Bergson (1859-1941), notadamente no período de 1889 a 1907. Sua primeira parte é dedicada à exposição da redefinição do conceito de causalidade dentro do Ensaio sobre os dados imediatos da consciência (1889). Neste livro, para que a causalidade em geral torne-se certa “causalidade psicológica”, uma série de posicionamentos teve de ser tomada pelo filósofo no intuito de questionar a importância de tal conceito na determinação da experiência interna do tempo. É nosso propósito pôr em evidência como essa mudança é operada sobre bases filosóficas seguras. Na segunda parte deste trabalho, procuramos expor como Bergson abandona a via da teoria do conhecimento em prol de uma ontologia fundamentada em bases fisiológicas inseguras, notadamente no que concerne à ideia de corpo que o autor apresenta em Matéria e memória (1896). Do ponto de vista filosófico, sua concepção de subjetividade, definida a partir de um campo de possibilidades, deixa em aberto modo como esse campo transforma-se, em retorno, da possibilidade à realidade. Dito de outro modo, o filósofo garante a especificidade da ação metafísica com precisão filosófica, mas não avança sobre o problema da realização com grau de precisão comparável. Com efeito, em algumas circunstâncias no ínterim de Matéria e memória (1896) e A evolução criadora (1907), Bergson ocupa-se do problema da realização em referência explícita ao próprio problema da causalidade. É dos desdobramentos conceituais desta causalidade concebida como “sentimento do esforço” que nos ocupamos aqui. Por fim, a terceira parte deste trabalho apresenta uma reflexão de conjunto sobre os pontos de vista acima mencionados. Nela, a relevância das duas causalidades é posta em destaque através da análise de um curso inédito de Georges Canguilhem, em que a problemática da causalidade na filosofia de Bergson é valorizada segundo o modo como procuramos entendê-la e expô-la nesta tese. Assim, a discussão das dificuldades da ação material poderá representar um prelúdio à compreensão da especificidade do problema da invenção técnica
Wang, Yu. „Multi-scale investigation and analysis of the friction behavior and wear in the manufacturing of the woven composite reinforcements“. Electronic Thesis or Diss., Mulhouse, 2024. http://www.theses.fr/2024MULH7126.
Der volle Inhalt der QuelleIn the manufacturing process of textile reinforcements, friction between twisted yarns is a critical factor that significantly influences the mechanical properties of fiber-reinforced composites. Excessive friction can deteriorate these properties. This study develops a comprehensive analytical framework to understand the friction behavior in the manufacturing of textile reinforcements. Two novel analytical models were introduced to describe friction behaviorof yarns. The models account for the full-scale contact dynamics influenced. Experimental validations confirm the model's efficacy by providing a detailed characterization of friction under various conditions, which reveal the influence of critical parameters on friction behavior of fabric architectures. Additionally, an innovative numerical model for predicting yarn friction and wear behavior was introduced, incorporating both geometric and mechanical components. A yarn model,considering fiber damage behavior based on the Timoshenko beam, was developed to explore friction and wear during reinforcement manufacturing. The model effectively addresses penetration problems through self-coding and was validated by experimental results and microCT imaging, confirming its accuracy. This method provides valuable insights into the mechanical response of yarns during reinforcement manufacturing, allowing for an in-depth understanding of the effect of yarn geometrical and mechanical parameters on friction and wear behavior. Future improvements can further characterize friction behavior during composite forming and optimize the manufacturing process, promoting longer product lifespans and reduced waste
Vincent, Julien. „Étude expérimentale des interactions aube-abradable à très grandes vitesses : influence du matériau et de sa microstructure“. Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0334.
Der volle Inhalt der QuelleThe turbofan efficiency can be improved by minimizing the blade-casing gap, thus reducing the aerodynamic loss. The reduced gap conduces to contact risk between the high-speed rotating blades and the engine case. Sacrificial materials, called abradable materials, are deposited on the casing to limit the damage caused by these contacts. These interactions involve a lot of damage mechanisms, which can be adverse or beneficial to the proper performance of the abradable seal and to the reliability of the engine. The aim of this thesis is to understand, predict and quantify the different damages and the interaction forces associated for abradable materials obtained with different process parameters. A triaxial dynamometer was developed to reproduce the local high-speed interactions (50 – 300 m/s) between the blade tip and the abradable material during transitional phases. The interaction forces measurement during short-lived contacts (300 µs – 1 ms) requires a large bandwidth. A correction method based on experimental modal analysis was implemented to extend the natural bandwidth of the device and attenuate the crosstalk between the different measurement channels. The damage mechanisms of abradable materials were studied by post-mortem analysis and correlated to the interaction forces and velocity
Delebarre, Corentin. „Etude expérimentale des systèmes d'étanchéité de type labyrinthe pour turbomachine par l'étude du contact grande vitesse“. Thesis, Toulouse, INPT, 2015. http://www.theses.fr/2015INPT0130.
Der volle Inhalt der QuelleS of turbomachinery. Especially in the secondary air sealing system, the tight clearance between the stationary and rotating parts improves control of engine seals and cooling levels between the different modules of the engines but may cause undesirable interactions between the static and rotating components. Dynamic sealing systems are composed of labyrinth seals coupled to a sacrificial abradable coating, which can accommodate interactions to preserve the global geometrical seal integrity. The objective of this thesis is to study and reproduce, through a technological high speed test rig specifically designed for the study, the labyrinth-abradable interactions applied to stainless steel/Al-Si 6% couple, under similar turbo-engine operating conditions. A suitable instrumentation is developed on the test ring to complete missing experimental data to characterize abradable labyrinth interactions. A tribological study, based on the third body concept, is proposed to identify wear mechanisms process of the Al-Si 6% coating. The influence of interaction control parameters and the seal geometry was investigated. Finally, a statistical study, based on the iconography of the correlation, is proposed to model the overall labyrinth-abradable system behavior and to identify influential parameters of the system and provide suitable criteria to monitor labyrinth seal interactions. This work was achieved within the framework of cooperation between TURBOMECA Bordes (SAFRAN Group), and the Laboratoire Génie de Production (LGP) de Tarbes
Raffalli, Chloé. „Les allergies cutanées aux fragrances : mécanisme d'action et rôle du facteur de transcription Nrf2. Du modèle 2D au modèle 3D“. Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS045/document.
Der volle Inhalt der QuelleAllergic contact dermatitis (ACD) represents a severe health problem. It is a dendritic cells (DCs) mediated skin disease caused by repeated exposure to an allergenic compound. ACD cases of fragrances in general population is estimated from 1.7 % to 4.1%. Contact sensitizers are compounds termed haptens and they will form a conjugate with epidermis and dermis proteins. Example is cinnamaldehyde (CinA), a molecule found in cinnamon. Linalool and limonene are terpenes found in lavender and oranges. In contact with the air, they will autoxidize to form highly allergenic compounds: allylic hydroperoxides. The first aim of this thesis was to study the mechanism of action of those terpenes and their respective allylic hydroperoxides on THP-1 cell-line, described as a surrogate of DCs. The transcription factor Nrf2 is playing a major role in oxidative stress and was also investigated.Consumers of cosmetic products are exposed to low quantities of allergenic compounds, but several times a day or a week. We wanted to study repeated exposure of low concentration of haptens on the skin.KCs also play a key role in ACD: they are the first cells that will encounter the allergenic compound in the skin. The second aim of this thesis was to study the impact of repeated exposure of low concentrations of CinA on those KCs and more particularly on the epidermis differenciation, using a 3D organotypic culture of skin
Tran, Thierry. „Programmation graphique interactive de tâches non répétitives de manipulation au contact“. Toulouse 3, 1990. http://www.theses.fr/1990TOU30223.
Der volle Inhalt der QuelleFathi, Ali. „Dégradation des aspérités des joints rocheux sous différentes conditions de chargement“. Thèse, Université de Sherbrooke, 2015. http://hdl.handle.net/11143/8176.
Der volle Inhalt der QuelleAbstract: The objective of the current research is to interpret the asperity degradation of rock joints under different loading conditions. For this aim, the changes of asperities during different stages of shearing in the three-dimensional joint surface are tracked. According to a concept named ‘tiny window’, a new methodology for the characterization of the joint surfaces was developed. The methodology is based on the three-dimensional coordinates of the joints surface that are captured before and after each test. After the reconstruction of geometric models of joint surface, in-contact areas were identified according to the height comparison of the face to face tiny windows. Therefore, the distribution and size of just in-contact areas, in-contact damaged areas and not in-contact areas are identified. Image analysis method was used to verify the results of the proposed method. The results indicated that the proposed method is suitable for determining the size and distribution of the contact and damaged areas at any shearing stage. A total of 38 replicas were prepared by pouring non-shrinking cement mortar on a fresh joint surface of a split granite block. Various loading conditions include monotonic and cyclic loading were applied to study the asperities degradation at different stages of shearing. The geometric properties of the in-contact tiny windows in the pre-peak, peak, post-peak softening and residual shearing stages were investigated based on their angle and height. It was found that those asperities facing the shear direction have the primary role in shearing. It is remarkable that different part of these asperities has their own special cooperation in shearing. The steepest parts (steeper tiny windows) are wore and the flatter parts (flatter tiny windows) are slid. The borderlines between these tiny windows defined as “damaged threshold angle” and “in-contact threshold angle”. By increasing normal load, both the amounts of threshold angles are decreased and contact and damaged areas increased. During low numbers of cycles (with low amplitude and frequency), independent of the type of cycle, contraction occurs and consequently the contact area and the shear strength parameters slightly increased. During larger number of cycles, degradation occurred on the second order asperities, therefore the shear strength parameters slowly decreased. It was also observed that tiny windows with different heights participate in the shearing process, not just the highest ones. The results of the proposed method indicated that considering differences between just in-contact areas and damaged areas provide useful insights into understanding the shear mechanism of rock joints.
Bücher zum Thema "Mécanisme de contact"
L, Johnson K. Contact mechanics. Cambridge [Cambridgeshire]: Cambridge University Press, 1987.
Den vollen Inhalt der Quelle findenL, Johnson K. Contact mechanics. Cambridge [Cambridgeshire]: Cambridge University Press, 1985.
Den vollen Inhalt der Quelle findenWeimin, Han, und Shillor M, Hrsg. Analysis and approximation of contact problems with adhesion or damage. Boca Raton: Chapman & Hall/CRC, 2006.
Den vollen Inhalt der Quelle findenJiří, Janušek, und Krbec Miroslav 1950-, Hrsg. Unilateral contact problems: Variational methods and existence theorems. Boca Raton: Chapman & Hall/CRC Press, 2005.
Den vollen Inhalt der Quelle findenW, Hutchinson John, und Wu Theodore Y, Hrsg. Advances in applied mechanics. Boston: Academic Press, 1994.
Den vollen Inhalt der Quelle findenContact mechanics. Cambridge [Cambridgeshire]: Cambridge University Press, 1989.
Den vollen Inhalt der Quelle findenEck, Christof, Miroslav Krbec und Jiri Jarusek. Unilateral Contact Problems. Taylor & Francis Group, 2019.
Den vollen Inhalt der Quelle findenHan, Weimin, Mircea Sofonea und Meir Shillor. Analysis and Approximation of Contact Problems with Adhesion or Damage. Taylor & Francis Group, 2005.
Den vollen Inhalt der Quelle findenEck, Christof, Miroslav Krbec und Jiri Jarusek. Unilateral Contact Problems: Variational Methods and Existence Theorems. Taylor & Francis Group, 2005.
Den vollen Inhalt der Quelle findenEck, Christof, Miroslav Krbec und Jiri Jarusek. Unilateral Contact Problems: Variational Methods and Existence Theorems. Taylor & Francis Group, 2005.
Den vollen Inhalt der Quelle findenBuchteile zum Thema "Mécanisme de contact"
Ploog, Katja. „Mécanismes discursifs entre contact de langues et dynamiques linguistiques“. In XXVe CILPR Congrès International de Linguistique et de Philologie Romanes, herausgegeben von Maria Iliescu, Heidi Siller-Runggaldier und Paul Danler, 1–357. Berlin, New York: De Gruyter, 2010. http://dx.doi.org/10.1515/9783110231922.1-357.
Der volle Inhalt der QuelleWANG, Xinxia, Xialing SHEN und Jing GUO. „La métaphore dans les dictionnaires bilingues d’apprentissage :“. In Dictionnaires et apprentissage des langues, 79–88. Editions des archives contemporaines, 2021. http://dx.doi.org/10.17184/eac.4627.
Der volle Inhalt der QuelleCraveur, Jean-Charles, und Philippe Jetteur. „Chapitre 12. Contact“. In Introduction à la mécanique non linéaire, 223–46. Dunod, 2020. http://dx.doi.org/10.3917/dunod.crave.2020.01.0223.
Der volle Inhalt der QuelleYASTREBOV, Vladislav A. „Méthodes numériques en contact micromécanique“. In Modélisation numérique en mécanique fortement non linéaire, 87–145. ISTE Group, 2023. http://dx.doi.org/10.51926/iste.9081.ch3.
Der volle Inhalt der QuelleCHOULY, Franz, Patrick HILD und Yves RENARD. „Méthodes de lagrangien et de Nitsche pour le contact avec frottement“. In Modélisation numérique en mécanique fortement non linéaire, 7–52. ISTE Group, 2023. http://dx.doi.org/10.51926/iste.9081.ch1.
Der volle Inhalt der QuelleALART, Pierre. „Calcul intensif en mécanique multicontact : de l’élastostatique à la dynamique granulaire“. In Modélisation numérique en mécanique fortement non linéaire, 53–85. ISTE Group, 2023. http://dx.doi.org/10.51926/iste.9081.ch2.
Der volle Inhalt der QuelleCurtis, Scott, und Oliver Gaycken. „Cinema and Science in the Silent Era“. In The Oxford Handbook of Silent Cinema, 305–31. Oxford University Press, 2024. http://dx.doi.org/10.1093/oxfordhb/9780190496692.013.10.
Der volle Inhalt der QuelleELIMARI, Nassim, und Gilles LAFARGUE. „Influence du système immunitaire comportemental sur la xénophobie et l’altruisme en temps de pandémie“. In Les épidémies au prisme des SHS, 75–82. Editions des archives contemporaines, 2022. http://dx.doi.org/10.17184/eac.5992.
Der volle Inhalt der QuelleBerichte der Organisationen zum Thema "Mécanisme de contact"
Amine, Razan, und Fabrizio Santoro. Rendre obligatoires les outils fiscaux numériques en réponse à la Covid : l’exemple d’Eswatini. Institute of Development Studies, April 2023. http://dx.doi.org/10.19088/ictd.2023.020.
Der volle Inhalt der QuelleRousseau, Henri-Paul. Gutenberg, L’université et le défi numérique. CIRANO, Dezember 2022. http://dx.doi.org/10.54932/wodt6646.
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