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Статті в журналах з теми "Compression de dynamique"
Viot, Philippe, and Florent Beani. "Comportement de mousses polymères en compression dynamique." Revue des composites et des matériaux avancés 13, no. 3 (December 23, 2003): 283–92. http://dx.doi.org/10.3166/rcma.13.283-292.
Повний текст джерелаBaraka, Abdelhak, Mohammed Matallah, Mustapha Djafour, and Mokhtar Bouazza. "Caractérisation des effets régissant le comportement dynamique du béton." Matériaux & Techniques 106, no. 5 (2018): 502. http://dx.doi.org/10.1051/mattech/2018043.
Повний текст джерелаMichel, P., P. Finet, and C. Raftopoulos. "Compression médullaire cervicale sur manœuvre dynamique par deux neurofibromes C2." Neurochirurgie 63, no. 1 (March 2017): 62. http://dx.doi.org/10.1016/j.neuchi.2016.11.091.
Повний текст джерелаGuezzi-Messaoud, Fadoua, Antoine Dupret, Arnaud Peizerat, and Yves Blanchard. "Capteur d’images à grande dynamique et compression intégrée pour technologie 3D." Traitement du signal 30, no. 6 (April 28, 2013): 343–65. http://dx.doi.org/10.3166/ts.30.343-365.
Повний текст джерелаRastel, D., and B. Lun. "Vers une meilleure compréhension de la compression dynamique en médecine vasculaire." Journal des Maladies Vasculaires 30, no. 4 (September 2005): 34. http://dx.doi.org/10.1016/s0398-0499(05)86302-4.
Повний текст джерелаRastel, D., and B. Lun. "P27 - Vers une meilleure compréhension de la compression dynamique en médecine vasculaire." Journal des Maladies Vasculaires 30, no. 4 (September 2005): 48. http://dx.doi.org/10.1016/s0398-0499(05)86331-0.
Повний текст джерелаVeilleux, Mario, and René Tinawi. "Comportement dynamique d'une éolienne à axe vertical (application pratique)." Canadian Journal of Civil Engineering 15, no. 3 (June 1, 1988): 369–81. http://dx.doi.org/10.1139/l88-052.
Повний текст джерелаBoussakri, Hassan, Abdelhalim Elibrahimi, Mohammed Bachiri, Ahmed Bouziane Ouaritini, Mohammed Shimi, Mohammed Elidrissi, and Abdelmajid Elmrini. "Treatment Results Of Diaphyseal Forearm Fractures With Dynamique Compression Plate A Retrospective study of 156 Cases." International Journal of Medicine and Surgery 2, no. 2 (December 26, 2015): 36–39. http://dx.doi.org/10.15342/ijms.v2i2.51.
Повний текст джерелаVeilleux, Mario, and René Tinawi. "Comportement dynamique d'une éolienne à axe vertical (développement théorique)." Canadian Journal of Civil Engineering 15, no. 3 (June 1, 1988): 355–68. http://dx.doi.org/10.1139/l88-051.
Повний текст джерелаKabore, C., and J. F. Kaux. "Les effets de la compression externe dynamique péristaltique type Normatec sur la récupération sportive." Science & Sports 32, no. 5 (October 2017): 266–77. http://dx.doi.org/10.1016/j.scispo.2017.04.012.
Повний текст джерелаДисертації з теми "Compression de dynamique"
Xu, Xiaoqiang. "Modélisation dynamique d'un système frigorifique domestique à compression de vapeur." ENSMP, 1996. http://www.theses.fr/1996ENMP0713.
Повний текст джерелаIn this thesis, a dynamic simulation model and a dynamic exergy analysis of a domestic vapour compression refrigerating system are developed, in order to decrease system energy consumption. The system consists of a compressor, a condenser, a diabatic capillary tube, an evaporator, a capillary tube-suction line heat exchanger and an insulation cabinet. The mathematical model of exchangers is based on mass, momentum and energy conservation equations, in which the refrigerant phase change and the transient and distributive parameters are introduced. The Control-volume formulation and the "SIMPLE C" algorithm are applied in the numerical solutions. The diabatic capillary tube model is distributive and include heat exchange in the tube-suction line exchanger. The critical flow and refrigerant discharge at capillary tube outlet are taken into account. The hermetic compressor model includes lubricant oil effect and heat exchange inside the compressor. The coupling of natural convection and radiation is taken into account in the insulation cabinet model. Once component models have been established, a new iterative solution method for coupling system model is developed. This method presents a "self-convergence" based on the mass balance of exchangers and on compressor and capillary tube characteristics. A method to determine the initial conditon from the refrigerant charge is presented as well. It enables to optimize the system refrigerant charge dynamically over a given operational range. In order to analyze system transient behaviour, a dynamic exergy balance of the refrigeration system has been established. This exergy balance enables to localize and quantify instantaneously system exergy losses, and thus shows the possible system performance improvement. An exergy efficiency for refrigeration system has been defined in order to characterize the thermodynamic perfection of the system in comparison with a correspondent reversible system. The dynamic simulation model and exergy analysis have been used on a domestic regrigerator working with R134a
Sun, Jian. "Allocation dynamique des taches et application parallele a la compression d'images." Paris 11, 1994. http://www.theses.fr/1994PA112231.
Повний текст джерелаBessard, Émeline. "Matériaux composites structuraux à base PEEK élaborés par thermo-compression dynamique : relation procédé-propriétés." Toulouse 3, 2012. http://thesesups.ups-tlse.fr/1893/.
Повний текст джерелаThe study objective is to investigate C/PEEK composites manufacturing by thermocompression by gauging two textile semi-products and by taking advantage of the EdyCO pilot capabilities featuring Cage System(r) technology. This process enables to reach high heating and cooling rate and to realise complex thermical cycles that offer new optimisation perspectives of application of thermoplastic resin composites. This work is about the study of manufacturing of two semi-products, the first one being a dry fabric of carbon powdered by PEEK, the other one being a multiaxial of continuous commingled yarns of C/PEEK. The first part of this work is focused on the study of the influence of semi-products and process parameters on consolidation phase of composite plates. Indeed, use of EDyCO pilot enabled to investigate high manufacturing temperature in order to suggest parameters propitious to reinforcement impregnation. The obtained results show that matrix degradation influences consolidation and that commingled structure may be harmful to impregnation. Cooling phase of thermo-compression cycle represents the second part of the this study. Thus, neat and reinforced PEEK crystallization and crystallization kinetics were characterised during anisotherm and isotherm cooling. A unified model was designed to predict crystallization kinetic of both neat and reinforced PEEK. This model describes PEEK crystallization as resulting from the contribution of two mechanisms to debrief of double melting peak phenomena. The influence of degradation is also analysed. To conclude this work, adapted optimal manufacturing cycles are proposed and mechanical properties are evaluated
Amélio, Sandrine. "Evolution microstructurale d'un alliage à base TiAl : sollicitation mécanique par compression dynamique et stabilité thermique." Vandoeuvre-les-Nancy, INPL, 2005. http://docnum.univ-lorraine.fr/public/INPL/2005_AMELIO_S.pdf.
Повний текст джерелаThe aim of this thesis is the study of the microstructural evolution of a γ-TiAl alloy during dynamic compression tests between 196 and 600 °C and isothermal heat treatments at 700 and 900 °C for various times, between 3 and 18 days. The alloy with a nominal composition of Ti-46. 5Al-4(Cr, Nb, Ta, B) (at. %) and a near lamellar microstructure presents a good combination of mechanical strength and ductility. The alloy is compound of three ordered phases: alpha-Ti3Al, gamma-TiAl and B2-TiAl. A study of the crystal structure of the B2, gamma and alpha2 phases, of their the orientation relationships and of the coincidence site lattices and the displacement shift complete lattices has been performed by convergent beam electron diffraction (CBED, Tanaka Multibeam Method and Microdiffraction)
Adalian, Céline. "Comportement du bois en compression dynamique multiaxiale : application à la simulation de crashs de conteneurs." Bordeaux 1, 1998. http://www.theses.fr/1998BOR10614.
Повний текст джерелаWood is a material used a energy absorbing device in containers for the transportation of dangerous materials. The design of these containers is more and more often done with finite element modelling. So, the aim of this research work was to create a numerical model for wood, the "wood model" in order to describe the behaviour of wood under dynamic multiaxial compression. We present experimental results and their analytical modelling for wood under static and dynamic compression which involves large deformations. This "wood model" is based on the experimental results mentioned before. It is used in a finite element explicit non-linear dynamic code. LS-DYNA3D. By this way, we can compare this model with other models used to characterize wood model as impact limiter crashed at 52 to 65 m/s with numerical results made with our wood model and with other numerical materials types used to model the behaviour of wood under compression with large deformations
Maurel, Martin. "Dynamique propagative d’impulsions optiques ultra-courtes pour un module de compression à base de fibre creuse." Thesis, Limoges, 2019. http://www.theses.fr/2019LIMO0116.
Повний текст джерелаUltra-short pulse laser, hundred femtoseconds, are currently an essential tool for many industrial or academic applications. However, their duration remains limited by the technology which composed this device itself. In addition, development of new microstructured optical fibers offers high-energy pulse guidance in gaseous media, thus allowing the generation of non-linear effects, key parameter for pulse compression and post-compression dynamics. The work of this thesis is therefore part of this context. Studies of ultra-short pulse compression dynamics are presented. Self-compression and post-compression are demonstrated at wavelengths ranging from 343 nm to 1030 nm with energy from few microJoules to several hundred microJoules and average power up to 100 W. Factor 29 of compressions are presented, with solitonic dynamic pulse with duration of 580 fs are compressed down to 19 fs. In addition, this technology has been integrated into an industrial platform installed at various customers' sites
Garabedian, Christian. "Modélisation et caractérisation des générateurs piézoélectriques de conversion mécanoélectrique par compression uniaxiale dynamique ou quasi-statique." Lyon, INSA, 1992. http://www.theses.fr/1992ISAL0097.
Повний текст джерелаThe mechano-electrical energy conversion in a piezoelectric element is achieved differently depending on the stress to be applied. Those differences are further analysed. After a brief summarize of the mechano-electrical conversion, a method leading ta the determination of the electrical parameters is achieved to characterize the piezo-element under dynamic compression conditions. The great differences between the low level coefficients values and those calculated from the experimental measurements lead us to go ahead in the establishment of a model better suite to this conversion and taking into account the dielectric and mechanical lasses as well as the mechanical environment in which the piezo-ceramic is held. This mode yielded the complete characterization of the ceramic working under dynamic compression and its high non linearities. This characterization has been achieved with the help of a computerized simulation. In the second part of this work, the analysis of the slow compression is made. The remaining electric field in the piezo-element yielded a new definition of the value of the electrical energy provided in the spark generation on a compression-decompression cycle and for a given cam position, ta optimize the inter-electrode distance. Then, after a comparison between bath conversion modes, we tried to determine which composition would be better suited in order ta get the higher electrical energy
Padovese, Linilson Rodrigues. "Etude des phénomènes dynamiques dans les pylônes compression des téléphériques monocâble." Grenoble 1, 1992. http://www.theses.fr/1992GRE10207.
Повний текст джерелаSchlumpf, Nicolas. "Adaptation dynamique de la compression d'un amplificateur RF pour des signaux modulés en amplitude et en phase /." [S.l.] : [s.n.], 2004. http://library.epfl.ch/theses/?display=detail&nr=3020.
Повний текст джерелаGuezzi, Messaoud Fadoua. "Analyse de l'apport des technologies d'intégration tri-dimensionnelles pour les imageurs CMOS : application aux imageurs à grande dynamique." Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST1022/document.
Повний текст джерелаWith the increase of systems complexity, integrating different technologies together has become a major challenge. Another challenge has traditionally been the limitation on the throughout between different part of the system coming from the interconnections. If traditional two dimensional integration solutions like System In a Package (SIP) bring heterogonous technologies together there is still limitations coming from the restricted number and lengths of interconnections between the different system components. Three Dimensional stacking (3D), by exploiting short vertical interconnections between different circuits of mixed technologies, has the potential to overcome these limitations. Still, despite strong interests for the 3D concepts, there is no advanced analysis of 3D integration benefits, especially in the field of imagers and smart image sensors. This thesis study the potential benefits of 3D integration, with local processing and short feedback loops, for the realisation of a High Dynamic Range (HDR) image sensor. The dense vertical interconnections are used to locally adapt the integration time by group of pixels, called macro-pixels, while keeping a classic pixel architecture and hence a high fill factor. Stacking the pixel section and circuit section enables a compact pixel and the integration of flexible and versatile functions. High Dynamic Range values producing an important quantity of data, the choice has been made to implement data compression to reduce the circuit throughout. A first level of compression is produced by coding the pixel value using a floating format with a common exponent shared among the macro-pixel. A second level of compression is proposed based on a simplified version of the Discrete Cosine Transform (DCT). Using this two level scheme, a compression of 93% can be obtained with a typical PSNR of 30 dB. A validation of the architecture was carried out by the development; fabrication and test of a prototype on a 2D, 180 nm, CMOS technology. A few pixels of each macro-pixel had to be sacrificed to implement the high dynamic range control signals and emulate the 3D integration. The test results are very promising proving the benefits that will bring the 3D integration in term of power consumption and image quality compared to a classic 2D integration. Future realisations of this architecture, done using a real 3D technology, separating sensing and processing on different circuits communicating by vertical interconnection will not need the sacrifice of any pixel to adjust the integration time, improving power consumption, image quality and latency
Книги з теми "Compression de dynamique"
Mathematical Theory of Compressible Fluid Flow. Dover Publications, 2004.
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