Literatura académica sobre el tema "EDP anisotrope"
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Artículos de revistas sobre el tema "EDP anisotrope"
Espinoza, Tomislav E. Monjak y Laura Teresa Piñero Feliciangeli. "CRUSTAL SEISMIC ANISOTROPY AT THE EDGE OF THE SOUTH-EAST BORDER OF CARIBBEAN AND SOUTH AMERICAN PLATES". Revista Brasileira de Geofísica 31, n.º 4 (1 de diciembre de 2013): 595. http://dx.doi.org/10.22564/rbgf.v31i4.340.
Texto completoTellier, C. R., T. G. Leblois y A. Charbonnieras. "Chemical Etching of {hk0} Silicon Plates in EDP Part I: Experiments and Comparison with TMAH". Active and Passive Electronic Components 23, n.º 1 (2000): 37–51. http://dx.doi.org/10.1155/apec.23.37.
Texto completoSukhomlinov, Vladimir S., Alexander S. Mustafaev, Hend Koubaji, Nikolay A. Timofeev y Oscar Murillo. "Kinetic theory of instability in the interaction of an electron beam and plasma with an arbitrary anisotropic electron velocity distribution function". New Journal of Physics 23, n.º 12 (1 de diciembre de 2021): 123044. http://dx.doi.org/10.1088/1367-2630/ac4125.
Texto completoKaviris, G., I. Spingos, V. Kapetanidis y P. Papadimitriou. "PRELIMINARY SHEAR-WAVE SPLITTING RESULTS IN THE BROADER AIGION AREA (GREECE) DURING 2013". Bulletin of the Geological Society of Greece 50, n.º 3 (27 de julio de 2017): 1153. http://dx.doi.org/10.12681/bgsg.11821.
Texto completoKonstantinopoulos, D., D. Giannopoulos, E. Sokos, K. I. Konstantinou y G. A. Tselentis. "THE CRUSTAL ANISOTROPY PATTERN IN THE EPICENTRAL AREA OF THE 2008 MW 6.4 EARTHQUAKE IN NORTHWEST PELOPONNESE, GREECE". Bulletin of the Geological Society of Greece 50, n.º 3 (27 de julio de 2017): 1174. http://dx.doi.org/10.12681/bgsg.11823.
Texto completoRahn, Perry H. y Christopher S. Johnson. "Effects of anisotropic transmissivity on a contaminant plume at Nemo, South Dakota". Environmental and Engineering Geoscience 8, n.º 1 (1 de febrero de 2002): 11–18. http://dx.doi.org/10.2113/gseegeosci.8.1.11.
Texto completoZhang, Yi, Jin Ma, Qiang Wang, Yongbiao Yang, Mingjie Zhu, Penglai Jia, Yuhao Duan y Zhimin Zhang. "Study on anisotropic behavior of 7075 Al alloy after extrusion". Materials Research Express 9, n.º 2 (1 de febrero de 2022): 026508. http://dx.doi.org/10.1088/2053-1591/ac4fdd.
Texto completoKroemer, R. T., Y. Michopoulos y B. M. Rode. "Intermolecular Potential Function Including Anisotropie Terms for Ammonia/Cu2+ Based on ab-initio Calculations". Zeitschrift für Naturforschung A 45, n.º 11-12 (1 de diciembre de 1990): 1303–8. http://dx.doi.org/10.1515/zna-1990-11-1212.
Texto completoTan, Michael y Mary Donnabelle Balela. "One-Pot Synthesis of High Aspect Ratio Copper Nanowires in Aqueous Solution". Advanced Materials Research 1119 (julio de 2015): 34–37. http://dx.doi.org/10.4028/www.scientific.net/amr.1119.34.
Texto completoLiu, Qingyu, Qinhe Zhang, Min Zhang y Jianhua Zhang. "Effect of Crystallographic Anisotropy on Micro EDM Process". Materials and Manufacturing Processes 30, n.º 8 (30 de septiembre de 2014): 961–67. http://dx.doi.org/10.1080/10426914.2014.962660.
Texto completoTesis sobre el tema "EDP anisotrope"
Dumas, Thomas. "Existence de solutions pour des équations apparentées au 1 Laplacien anisotrope". Thesis, Cergy-Pontoise, 2018. http://www.theses.fr/2018CERG0963/document.
Texto completoWe study anisotropic p-Laplacian equations when some components of p are equal to 1
Belhachmi, Ayoub. "Une méthode implicite pour la construction des modèles géologiques complexes via une interpolation à l'aide des splines et une régularisation basée sur les équations aux dérivées partielles". Electronic Thesis or Diss., Université Côte d'Azur, 2024. http://www.theses.fr/2024COAZ5000.
Texto completoThe construction of a geological numerical model is a key step in the study and exploration of the subsurface. These models are constructed from seismic or well data, which consist of data points associated with values corresponding to their geological ages. This task involves constructing an implicit function, known also as stratigraphic function, which interpolates this set of data points. Often the available data are sparse and noisy, which makes this task difficult, mainly for reservoirs where the geological structures are complex with distinct discontinuities and unconformities. To address this, the interpolation problem is typically supplemented with a regularization term that enforces a regular behaviour of the implicit function. In this thesis, we propose a new method to compute the stratigraphic function that represents geological layers in arbitrary settings. In this method, the data are interpolated by piecewise quadratic C^1 Powell-Sabin splines and the function can be regularized via many regularization energies. The method is discretized in finite elements on a triangular mesh conforming to the geological faults. Compared to classical interpolation methods, the use of piecewise quadratic splines has two major advantages. First, a better handling of stratigraphic surfaces with strong curvatures. Second, a reduction in mesh resolution, while generating surfaces of higher smoothness and regularity.The regularization of the function is the most difficult component of any implicit modeling approach. Often, classical methods produce inconsistent geological models, in particular for data with high thickness variation, and bubble effects are generally observed. To handle this problem, we introduce two new regularization energies that are linked to two fundamental PDEs, in their general form with spatially varying coefficients. These PDEs are the anisotropic diffusion equation and the equation that describes the bending of an anisotropic thin plate. In the first approach, the diffusion tensor is introduced and iteratively adapted to the variations and anisotropy of the data. In the second, the rigidity tensor is iteratively adapted to the variations and anisotropy in the data. We demonstrate the effectiveness of the proposed methods in 2D, specifically on cross-sections of geological models with complex fault networks and thickness variations in the layers
Veychard, Damien. "Conception et réalisation d'un convertisseur électro-thermique à grande constante de temps en technologie microsystème pour un disjoncteur thermique". Grenoble INPG, 1999. http://www.theses.fr/1999INPG0191.
Texto completoPeguiron, Florence. "Modélisations physique et numérique de la zone endommagée autour de galeries creusées dans l'argile de Boom". Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0318.
Texto completoThe disposal of high-level radioactive waste is a complex issue due to the very strict requirements to achieve a long-term security. Their storage in deep geological formation is considered as a highly promising solution. Due to its low permeability and self-sealing capability, Boom Clay is a particularly adequate formation. It has been studied at HADES (High Activity Disposal Experimental Site) underground research laboratory in Mol (Belgium) since 1974. The stress release occurring during the excavation of galleries in Boom Clay induces an Excavation Damaged Zone (EDZ). Mechanical, hydraulic and chemical properties can locally be disturbed. Therefore, it is particularly important to predict the extent of this damaged zone and to determine whether it could have an impact on the safety of a future disposal. This present thesis aims at contributing to the understanding of the Excavation Damaged Zone by using physical and numerical models. The low permeability of Boom Clay formation induces a high hydro- mechanical coupling that leads to a short-term pore water pressure disturbance. This phenomena has been observed during the excavation of the underground laboratory HADES. Piezometers installed in the clay formation indicate a slight increase followed by a significant drop of the pore water pressure as the tunnel front comes closer. Furthermore, a higher convergence was measured horizontally (i.e. parallel to the bedding planes) and the damaged zone was as well larger in the horizontal direction. This could be related to mechanical anisotropy (strength and/or strain) as well as hydraulic anisotropy. The initial anisotropic stress field in the clay formation could also play a role. The major part of the work is dedicated to physical modelling of tunnel excavation in Boom Clay. To achieve this, hollow cylinders are subjected to a rapid decrease of the inner confining pressure in a modified triaxial cell available at HEIA-FR. Straight before and several times after the unloading, the samples are scanned in a high resolution tomograph to retrieve the displacements. To simulate the clay response during the excavation of galleries and shafts, tests will be conducted on samples cored parallel, respectively perpendicular to the bedding planes. This will allow to underline the influence of the orientation of the bedding planes. In a second part of the research, numerical simulations of the laboratory tests will be performed with a focus on the anisotropic behavior of Boom Clay. The constitutive model will take into account the strength anisotropy as well as the strain anisotropy. The numerical results will be compared to experimental observations, and as far as possible to analytical solutions. After validation of the constitutive model on the laboratory results, it is foreseen to model the excavation of galleries of the underground research laboratory HADES and to compare the numerical results to in situ measurements obtained from CLIPEX project (CLay Instrumentation Program for the EXtension of an underground research laboratory)
Campana, Lorenzo. "Modélisation stochastique de particules non sphériques en turbulence". Thesis, Université Côte d'Azur, 2022. http://www.theses.fr/2022COAZ4019.
Texto completoThe motion of small non- spherical particles suspended in a turbulent flow is relevant for a large variety of natural and industrial applications such as aerosol dynamics in respiration, red blood cells motion, plankton dynamics, ice in clouds, combustion, to name a few. Anisotropic particles react on turbulent flows in complex ways, which depend on a wide range of parameters (shape, inertia, fluid shear). Inertia-free particles, with size smaller than the Kolmogorov length, follow the fluid motion with an orientation generally defined by the local turbulent velocity gradient. Therefore, this thesis is focused on the dynamics of these objects in turbulence exploiting stochastic Lagrangian methods. The development of a model that can be used as predictive tool in industrial computational fluid dynamics (CFD) is highly valuable for practical applications in engineering. Models that reach an acceptable compromise between simplicity and accuracy are needed for progressing in the field of medical, environmental and industrial processes. The formulation of a stochastic orientation model is studied in two-dimensional turbulent flow with homogeneous shear, where results are compared with direct numerical simulations (DNS). Finding analytical results, scrutinising the effect of the anisotropies when they are included in the model, and extending the notion of rotational dynamics in the stochastic framework, are subjects addressed in our work. Analytical results give a reasonable qualitative response, even if the diffusion model is not designed to reproduce the non-Gaussian features of the DNS experiments. The extension to the three-dimensional case showed that the implementation of efficient numerical schemes in 3D models is far from straightforward. The introduction of a numerical scheme with the capability to preserve the dynamics at reasonable computational costs has been devised and the convergence analysed. A scheme of splitting decomposition of the stochastic differential equations (SDE) has been developed to overcome the typical instability problems of the Euler–Maruyama method, obtaining a mean-square convergence of order 1/2 and a weakly convergence of order 1, as expected. Finally, model and numerical scheme have been implemented in an industrial CFD code (Code_Saturne) and used to study the orientational and rotational behaviour of anisotropic inertia-free particles in an applicative prototype of inhomogeneous turbulence, i.e. a turbulent channel flow. This real application has faced two issues of the modelling: the numerical implementation in an industrial code, and whether and to which extent the model is able to reproduce the DNS experiments. The stochastic Lagrangian model for the orientation in the CFD code reproduces with some limits the orientation and rotation statistics of the DNS. The results of this study allows to predict the orientation and rotation of aspherical particles, giving new insight into the prediction of large scale motions both, in two-dimensional space, of interest for geophysical flows, and in three-dimensional industrial applications
Oumouni, Mestapha. "Analyse numérique de méthodes performantes pour les EDP stochastiques modélisant l'écoulement et le transport en milieux poreux". Phd thesis, Université Rennes 1, 2013. http://tel.archives-ouvertes.fr/tel-00904512.
Texto completoSerege, Matthieu. "Développement d'une nouvelle technique d'analyse pour les nanosctructures gravées par plasmas : (S)TEM EDX quasi in-situ". Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAT097/document.
Texto completoAs the size of integrated circuit continues to shrink, plasma processes are more and more challenged and show limitations to etch nanometer size features in complex stacks of thin layers. The achievement of anisotropic etching relies on the formation of passivation layers on the sidewalls of the etched features, which act like a protective film that prevents lateral etching by the plasma radicals. However, this layer also generate a slope in the etch profile and it’s difficult to control its thickness. Another thin layer called “reactive layer” is also formed at the bottom of the features. Etch products are formed in this layer allowing a high etch rate of the substrate. It starts to be realized that controlling the thickness of this reactive layer is the key to achieve very high selective processes.However, the layers to be analyzed are chemically highly reactive because they contain large concentrations of halogens and they get immediately modified (oxidized) when exposed to ambient atmosphere.In this work we develop an original, simple and extremely powerful approach to observe passivation layers quasi in-situ (i.e. without air exposure): After plasma etching, the wafer is transported under vacuum inside an adapted suitcase to a deposition chamber where it is encapsulated by a metallic layer (magnetron sputtering PVD). Then, the encapsulated features can be observed ex situ without chemical / thickness modification thanks to (S)TEM-EDX analysis
Van, Den Eijnden Bram. "Modélisation multi-échelle du comportement hydro-méchanique des roches argileuses". Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAI034/document.
Texto completoFeasibility studies for deep geological radioactive waste disposal facilities have led to an increased interest in the geomechanical modelling of its host rock. In France, a potential host rock is the Callovo-Oxfordian claystone. The low permeability of this material is of key importance, as the principal of deep geological disposal strongly relies on the sealing capacity of the host formation. The permeability being coupled to the mechanical material state, hydromechanical coupled behaviour of the claystone becomes important when mechanical alterations are induced by gallery excavation in the so-called excavation damaged zone (EDZ). In materials with microstructure such as the Callovo-Oxfordian claystone [Robinet et al., 2012], the macroscopic behaviour has its origin in the interaction of its mi- cromechanical constituents. In addition to the coupling between hydraulic and mech- anical behaviour, a coupling between the micro (material microstructure) and macro will be made. By means of the development of a framework of computational homo- genization for hydromechanical coupling, a doublescale modelling approach is formu- lated, for which the macroscale constitutive relations are derived from the microscale by homogenization. An existing model for the modelling of hydromechanical coupling based on the distinct definition of grains and intergranular pore space [Frey, 2010] is adopted and modified to enable the application of first order computational homogenization for obtaining macroscale stress and fluid transport responses. This model is used to constitute a periodic representative elementary volume (REV) that allows the rep- resentation of the local macroscopic behaviour of the claystone. As a response to deformation loading, the behaviour of the REV represents the numerical equivalent of a constitutive relation at the macroscale. For the required consistent tangent operators, the framework of computational homogenization by static condensation [Kouznetsova et al., 2001] is extended to hy- dromechanical coupling. The theoretical developments of this extension are imple- mented in the finite element code Lagamine (Li` ege) as an independent constitutive relation. For the modelling of localization of deformation, which in classical FE meth- ods suffers from the well-known mesh dependency, the doublescale approach of hy- dromechanical coupling is combined with a local second gradient model [Collin et al., 2006] to control the internal length scale of localized deformation. By accepting the periodic boundary conditions as a regularization of the microscale deformation, the use of the multiscale model in combination with the local second gradient model can be used for modelling localization phenomena in HM-coupled settings with material softening. The modelling capacities of the approach are demonstrated by means of simula- tions of oedometer tests and biaxial compression tests. The approach is demonstrated to be a powerful way to model anisotropy in the mechanical as well as the hydraulic behaviour of the material both in the initial material state and as an effect of hy- dromechanical alterations. For the application to the modelling of Callovo-Oxfordian claystone, microstructural REVs are calibrated to geometrical characteristics of the inclusion that form the microstructure under consideration and to macroscale ex- perimental results of the mechanical behaviour. The calibrated constitutive relation is used in the simulation of gallery excavation processes. These computations give a proof of concept of the doublescale assessment of the hydromechanical behaviour of the excavation damaged zones around galleries in the context of nuclear waste disposal
Abdi, Hadj. "Mechanical and Hydromechanical Behavior of Host Sedimentary Rocks for Deep Geological Repository for Nuclear Wastes". Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/30924.
Texto completoHatchi, Roméo. "Analyse mathématique de modèles de trafic routier congestionné". Thesis, Paris 9, 2015. http://www.theses.fr/2015PA090048/document.
Texto completoThis thesis is devoted to the mathematical analysis of some models of congested road traffic. The essential notion is the Wardrop equilibrium. It continues Carlier and Santambrogio's works with coauthors. With Baillon they studied the case of two-dimensional cartesian networks that become very dense in the framework of $\Gamma$-convergence theory. Finding Wardrop equilibria is equivalent to solve convex minimisation problems.In Chapter 2 we look at what happens in the case of general networks, increasingly dense. New difficulties appear with respect to the original case of cartesian networks. To deal with these difficulties we introduce the concept of generalized curves. Structural assumptions on these sequences of discrete networks are necessary to obtain convergence. Sorts of Finsler distance are used and keep track of anisotropy of the network. We then have similar results to those in the cartesian case.In Chapter 3 we study the continuous model and in particular the limit problems. Then we find optimality conditions through a duale formulation that can be interpreted in terms of continuous Wardrop equilibria. However we work with generalized curves and we cannot directly apply Prokhorov's theorem, as in \cite{baillon2012discrete, carlier2008optimal}. To use it we consider a relaxed version of the limit problem with Young's measures. In Chapter 4 we focus on the long-term case, that is, we fix only the distributions of supply and demand. As shown in \cite{brasco2013congested} the problem of Wardrop equilibria can be reformulated in a problem à la Beckmann and reduced to solve an elliptic anisotropic and degenerated PDE. We use the augmented Lagrangian scheme presented in \cite{benamou2013augmented} to show a few numerical simulation examples. Finally Chapter 5 is devoted to studying Monge problems with as cost a Finsler distance. It leads to minimal flow problems. Discretization of these problems is equivalent to a saddle-point problem. We then solve it numerically again by an augmented Lagrangian algorithm
Capítulos de libros sobre el tema "EDP anisotrope"
Gerstein, Gregory, Florian Nürnberger y Hans Jürgen Maier. "Evolution of Void Shape Anisotropy in Deformed BCC Steels". En EPD Congress 2016, 173–79. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48111-1_20.
Texto completoGerstein, Gregory, Florian Nürnberger y Hans Jürgen Maier. "Evolution of Void Shape Anisotropy in Deformed BCC steels". En 2016 EPD Congress, 173–79. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119274742.ch20.
Texto completoHan, Guomin, Zhiqiang Han, Alan A. Luo, Anil K. Sachdev y Baicheng Liu. "Study on Effects of Interfacial Anisotropy and Elastic Interaction on Morphology Evolution and Growth Kinetics of a Single Precipitate in Mg-Al Alloy by Phase Field Modelling". En EPD Congress 2013, 95–105. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118658468.ch12.
Texto completoZinoviev, Peter A. y Yury N. Ermakov. "Elasto-Dissipative Characteristics (EDC) of Anisotropic Bodies". En Energy Dissipation in Composite Materials, 47–87. Routledge, 2018. http://dx.doi.org/10.1201/9780203757529-4.
Texto completo"Numerical investigations on the anisotropic damage of the EDZ of drifts in rock salt". En Mechanical Behaviour of Salt VIII, 121–26. CRC Press, 2015. http://dx.doi.org/10.1201/b18393-16.
Texto completoActas de conferencias sobre el tema "EDP anisotrope"
Bush, Iain y Stuart Crampin. "Observations of EDA and PTL anisotropy in shear wave VSPs". En SEG Technical Program Expanded Abstracts 1987. Society of Exploration Geophysicists, 1987. http://dx.doi.org/10.1190/1.1892023.
Texto completoChen, Quanfang, Da-Jeng Yao, Chang-Jin “CJ” Kim y Greg P. Carman. "Influence of Fabrication and Crystal Orientation on the Strength of Silicon Microridges". En ASME 1998 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/imece1998-1278.
Texto completoEpov, Vladimir S., Alexander E. Klimov y Vladimir N. Shumsky. "Anisotropy of current-voltage characteristics in PbSnTe:In film structures". En 2009 International Conference and Seminar on Micro/Nanotechnologies and Electron Devices (EDM). IEEE, 2009. http://dx.doi.org/10.1109/edm.2009.5173945.
Texto completoTardan, Z. y Z. Abdul Halim. "Comparison of isotropic dry etching process using XeF2 and ANisotropic Wet Etching Process using EDP for microhotplate device". En 2011 3rd Asia Symposium on Quality Electronic Design (ASQED 2011). IEEE, 2011. http://dx.doi.org/10.1109/asqed.2011.6111708.
Texto completoNoguchi, Kenji, Chisato Mishima, Masao Yamazaki, Hiroshi Matsuoka, Hironari Mitarai y Yoshinobu Honkura. "Development of dy-free NdFeB anisotropic bonded magnet (New MAGFINE)". En 2011 1st International Electric Drives Production Conference (EDPC). IEEE, 2011. http://dx.doi.org/10.1109/edpc.2011.6085539.
Texto completoChesnitskiy, Anton V., Aleksey N. Kosmynin, Oleg M. Kaigorodov, Pavel A. Sibirtsev, Ksenia N. Kosmynina y Konstantin V. Lemberg. "Multibeam Antenna Implementation Using Anisotropic Metasurfaces". En 2022 IEEE 23rd International Conference of Young Professionals in Electron Devices and Materials (EDM). IEEE, 2022. http://dx.doi.org/10.1109/edm55285.2022.9855123.
Texto completoBadin, Aleksandr V., Aleksandr I. Berdyugin, Vasilii Y. Vigovskii y Grigorii E. Dunaevskii. "System of automated measurement of electromagnetic response of anisotropic materials in quasi-optical beams". En 2017 18th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM). IEEE, 2017. http://dx.doi.org/10.1109/edm.2017.7981760.
Texto completoKhmelev, Vladimir N., Viktor A. Nesterov y Andrey V. Shalunov. "Increasing the Uniformity of Amplitude Oscillations of Anisotropic Ultrasonic Disc Emitters for Gas Media". En 2018 19th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM). IEEE, 2018. http://dx.doi.org/10.1109/edm.2018.8434991.
Texto completoBaloglu, Maximilian Volkan y Kai Willner. "Influence of the Constitutive Contact Law on the Anisotropic Material Parameters of Sheet-Layered Lamination Stacks". En 2018 8th International Electric Drives Production Conference (EDPC). IEEE, 2018. http://dx.doi.org/10.1109/edpc.2018.8658276.
Texto completoChernov, Artyom S., Mikhail A. Chebanov, Viktor A. Gridchin, Vladislav Yu Vasilyev y Alexander D. Byalik. "A study of 3D boss structure formation in anisotropic etching of Si (100) in aqueous KOH". En 2015 16th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM). IEEE, 2015. http://dx.doi.org/10.1109/edm.2015.7184494.
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