Littérature scientifique sur le sujet « MsFEM »
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Articles de revues sur le sujet "MsFEM"
Hollaus, Karl. « A MSFEM to simulate the eddy current problem in laminated iron cores in 3D ». COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 38, no 5 (2 septembre 2019) : 1667–82. http://dx.doi.org/10.1108/compel-12-2018-0538.
Texte intégralLegoll, Frédéric, Pierre-Loïk Rothé, Claude Le Bris et Ulrich Hetmaniuk. « An MsFEM Approach Enriched Using Legendre Polynomials ». Multiscale Modeling & ; Simulation 20, no 2 (30 juin 2022) : 798–834. http://dx.doi.org/10.1137/21m1444151.
Texte intégralLe Bris, Claude, Frédéric Legoll et Alexei Lozinski. « An MsFEM Type Approach for Perforated Domains ». Multiscale Modeling & ; Simulation 12, no 3 (janvier 2014) : 1046–77. http://dx.doi.org/10.1137/130927826.
Texte intégralKlimczak, Marek, et Witold Cecot. « An adaptive MsFEM for nonperiodic viscoelastic composites ». International Journal for Numerical Methods in Engineering 114, no 8 (12 février 2018) : 861–81. http://dx.doi.org/10.1002/nme.5768.
Texte intégralKlimczak, Marek, et Witold Cecot. « Higher Order Multiscale Finite Element Method for Heat Transfer Modeling ». Materials 14, no 14 (8 juillet 2021) : 3827. http://dx.doi.org/10.3390/ma14143827.
Texte intégralDegond, Pierre, Alexei Lozinski, Bagus Putra Muljadi et Jacek Narski. « Crouzeix-Raviart MsFEM with Bubble Functions for Diffusion and Advection-Diffusion in Perforated Media ». Communications in Computational Physics 17, no 4 (avril 2015) : 887–907. http://dx.doi.org/10.4208/cicp.2014.m299.
Texte intégralLi, Cui Yu, et Xiao Tao Zhang. « Multi-Scale Finite Element Method and its Application ». Advanced Materials Research 146-147 (octobre 2010) : 1583–86. http://dx.doi.org/10.4028/www.scientific.net/amr.146-147.1583.
Texte intégralChamoin, Ludovic, et Frédéric Legoll. « Goal-oriented error estimation and adaptivity in MsFEM computations ». Computational Mechanics 67, no 4 (17 mars 2021) : 1201–28. http://dx.doi.org/10.1007/s00466-021-01990-x.
Texte intégralBal, Guillaume, et Wenjia Jing. « Corrector Theory for MsFEM and HMM in Random Media ». Multiscale Modeling & ; Simulation 9, no 4 (octobre 2011) : 1549–87. http://dx.doi.org/10.1137/100815918.
Texte intégralEfendiev, Yalchin, Juan Galvis et M. Sebastian Pauletti. « Multiscale Finite Element Methods for Flows on Rough Surfaces ». Communications in Computational Physics 14, no 4 (octobre 2013) : 979–1000. http://dx.doi.org/10.4208/cicp.170512.310113a.
Texte intégralThèses sur le sujet "MsFEM"
Madiot, François. « Méthodes éléments finis de type MsFEM pour des problèmes d'advection-diffusion ». Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC1052/document.
Texte intégralThis work essentially deals with the development and the study of multiscale finite element methods for multiscale advection-diffusion problems in the advection-dominated regime. Two types of approaches are investigated: Take into account the advection in the construction of the approximation space, or apply a stabilization method. We begin with advection-dominated advection-diffusion problems in heterogeneous media. We carry on with advection-dominated advection-diffusion problems posed in perforated domains.Here, we focus on the Crouzeix-Raviart type boundary condition for the construction of the multiscale finite elements. We consider two different situations depending on the condition prescribed on the boundary of the perforations: the homogeneous Dirichlet condition or the homogeneous Neumann condition. This study relies on a coercivity assumption.Lastly, we consider a general framework where the advection-diffusion operator is not coercive, possibly in the advection-dominated regime. We propose a Finite Element approach based on the use of an invariant measure associated to the adjoint operator. This approach is unconditionally well-posed in the mesh size. We compare it numerically to a standard stabilization method
Biezemans, Rutger. « Multiscale methods : non-intrusive implementation, advection-dominated problems and related topics ». Electronic Thesis or Diss., Marne-la-vallée, ENPC, 2023. http://www.theses.fr/2023ENPC0029.
Texte intégralThis thesis is concerned with computational methods for multiscale partial differential equations (PDEs), and in particular the multiscale finite element method (MsFEM). This is a finite element type method that performs a Galerkin approximation of the PDE on a problem-dependent basis. Three particular difficulties related to the method are addressed in this thesis. First, the intrusiveness of the MsFEM is considered. Since the MsFEM uses a problem-dependent basis, it cannot easily be implemented in generic industrial codes and this hinders its adoption beyond academic environments. A generic methodology is proposed that translates the MsFEM into an effective problem that can be solved by generic codes. It is shown by theoretical convergence estimates and numerical experiments that the new methodology is as accurate as the original MsFEM. Second, MsFEMs for advection-dominated problems are studied. These problems cause additional instabilities for naive discretizations. An explanation is found for the instability of previously proposed methods. Numerical experiments show the stability of an MsFEM with Crouzeix-Raviart type boundary conditions enriched with bubble functions. Third, a new convergence analysis for the MsFEM is presented that, for the first time, establishes convergence under minimal regularity hypotheses. This bridges an important gap between the theoretical understanding of the method and its field of application, where the usual regularity hypotheses are rarely satisfied
Pham, Thanh Vinh. « The performance of Multilevel Structural Equation Modeling (MSEM) in comparison to Multilevel Modeling (MLM) in multilevel mediation analysis with non-normal data ». Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/7077.
Texte intégralMbogning, Cyprien. « Inférence dans les modèles conjoints et de mélange non-linéaires à effets mixtes ». Thesis, Paris 11, 2012. http://www.theses.fr/2012PA112415/document.
Texte intégralThe main goal of this thesis is to develop new methodologies for the analysis of non linear mixed-effects models, along with their implementation in accessible software and their application to real problems. We consider particularly extensions of non-linear mixed effects model to mixture models and joint models. The study of these two extensions is the essence of the work done in this document, which can be divided into two major parts. In the first part, we propose, in order to have a better control of heterogeneity linked to data of patient issued from several clusters, extensions of NLMEM to mixture models. We suggest in this Thesis to combine the EM algorithm, traditionally used for mixtures models when the variables studied are observed, and the SAEM algorithm, used to estimate the maximum likelihood parameters when these variables are not observed. The resulting procedure, referred MSAEM, allows avoiding the introduction of a simulation step of the latent categorical covariates in the estimation algorithm. This algorithm appears to be extremely fast, very little sensitive to parameters initialization and converges to a (local) maximum of the likelihood. This methodology is now available under the Monolix software. The second part of this thesis deals with the joint modeling of the evolution of a biomarker over time and the time between successive appearances of a possibly censored event of interest. We consider among other, the right censoring and interval censorship of multiple events. The parameters of the resulting joint model are estimated by maximizing the exact joint likelihood by using a MCMC-SAEM algorithm. The proposed methodology is now available under Monolix
Peng, Shuiran. « Analyse mathématique et numérique de plusieurs problèmes non linéaires ». Thesis, Poitiers, 2018. http://www.theses.fr/2018POIT2306/document.
Texte intégralThis thesis is devoted to the theoretical and numerical study of several nonlinear partial differential equations, which occur in the mathematical modeling of phase separation and micro-electromechanical system (MEMS). In the first part, we study higher-order phase separation models for which we obtain well-posedness and dissipativity results, together with the existence of global attractors and, in certain cases, numerical simulations. More precisely, we consider in this first part higher-order Allen-Cahn and Cahn-Hilliard equations with a regular potential and higher-order Allen-Cahn equation with a logarithmic potential. Moreover, we study higher-order anisotropic models and higher-order generalized Cahn-Hilliard equations, which have applications in biology, image processing, etc. We also consider the hyperbolic relaxation of higher-order anisotropic Cahn-Hilliard equations. In the second part, we develop semi-implicit and implicit semi-discrete, as well as fully discrete, schemes for solving the nonlinear partial differential equation, which describes both the elastic and electrostatic effects in an idealized MEMS capacitor. We analyze theoretically the stability of these schemes and the convergence under certain assumptions. Furthermore, several numerical simulations illustrate and support the theoretical results
Efendiev, Yalchin R. « The Multiscale Finite Element Method (MsFEM) and Its Applications ». Thesis, 1999. https://thesis.library.caltech.edu/4487/1/Efendiev_yr_1999.pdf.
Texte intégralMultiscale problems occur in many scientific and engineering disciplines, in petroleum engineering, material science, etc. These problems are characterized by the great deal of spatial and time scales which make it difficult to analyze theoretically or solve numerically. On the other hand, the large scale features of the solutions are often of main interest. Thus, it is desirable to have a numerical method that can capture the effect of small scales on large scales without resolving the small scale details.
In the first part of this work we analyze the multiscale finite element method (MsFEM) introduced in [28] for elliptic problems with oscillatory coefficients. The idea behind MsFEM is to capture the small scale information through the base functions constructed in elements that are larger than the small scale of the problem. This is achieved by solving for the finite element base functions from the leading order of homogeneous elliptic equation. We analyze MsFEM for different situations both analytically and numerically. We also investigate the origin of the resonance errors associated with the method and discuss the ways to improve them.
In the second part we discuss flow based upscaling of absolute permeability which is an important step in the practical simulations of flow through heterogeneous formations. The central idea is to compute the upscaled, grid-block permeability from fine scale solutions of the flow equation. It is well known that the grid block permeability may be strongly influenced by the boundary conditions imposed on the flow equations and the size of grid blocks. We analyze the effects of the boundary conditions and grid block sizes on the computed grid block absolute permeabilities. Moreover, we employ the ideas developed in the analysis of MsFEM to improve the computed values of absolute permeability.
The last part of the work is the application of MsFEM as well as upscaling of absolute permeability on upscaling of two-phase flow. In this part we consider coarse models using MsFEM. We demonstrate the efficiency of these models for practical problems. Moreover, we show that these models improve the existing approaches.
Zhong, Hui-Ru, et 鍾惠如. « A Study Of MSEM in Learning Outcomes-A Case in IEET ». Thesis, 2013. http://ndltd.ncl.edu.tw/handle/83341245068650575499.
Texte intégral元智大學
工業工程與管理學系
101
Purpose of this study was to study assess the learning effect through multilevel structural equation model and collect data from a department participating IEET certification in Taiwan. Three different questionnaires used in this study course questionnaire,core competencies questionnaire and alumni questionnaire. And respondents are undergraduate student’s from the department. Procedure is as follows (1)calculate three questionnaires intra-class correlation index to confirm the data which fit the requirement of Multilevel SEM (2)calculate questionnaire’s reliability, and fit the model by confirmatory factory analysis. And then calculate variables factor loadings. (3)we discuss causality between course and core competencies indirect effect, and causality educational goals and core competencies in alumni. The analytic show that result indirect effect is not significant, but causality educational goals and core competencies in alumni is significant. The possible explanation is that the in-school students have not yet entered the job-market, so less understand how to cooperate what have learned into what will be used in his/her job. Keyword : Multilevel structural equation model、Intra-Class coefficient、Indirect effect
Costello, Kirt Allen. « Moving the Rice MSFM into a real-time forecast mode using solar wind driven forecast modules ». Thesis, 1998. http://hdl.handle.net/1911/19251.
Texte intégral« Resilience and Vulnerability Mechanisms in the Within-Day Pain Coping Process : Test of a Two-Factor Mediation Model ». Doctoral diss., 2018. http://hdl.handle.net/2286/R.I.50607.
Texte intégralDissertation/Thesis
Doctoral Dissertation Psychology 2018
Chapitres de livres sur le sujet "MsFEM"
Klimczak, Marek, et Witold Cecot. « MsFEM Upscaling for the Coupled Thermo-Mechanical Problem ». Dans Computational Science – ICCS 2021, 562–75. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-77977-1_45.
Texte intégralLe Bris, Claude, Frédéric Legoll et Alexei Lozinski. « MsFEM à la Crouzeix-Raviart for Highly Oscillatory Elliptic Problems ». Dans Partial Differential Equations : Theory, Control and Approximation, 265–94. Berlin, Heidelberg : Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41401-5_11.
Texte intégralHasan, Mohamad K., et Xuegang (Jeff) Ban. « A Link-Node Nonlinear Complementarity Model for a Multiclass Simultaneous Transportation Dynamic User Equilibria ». Dans Transportation Systems and Engineering, 370–92. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-8473-7.ch018.
Texte intégralActes de conférences sur le sujet "MsFEM"
Legoll, F., et L. Chamoin. « Certified Computations with PGD Model Reduction in the MsFEM Framework ». Dans 10th International Conference on Adaptative Modeling and Simulation. CIMNE, 2021. http://dx.doi.org/10.23967/admos.2021.025.
Texte intégralHollaus, Karl, Joachim Schöberl et Markus Schöbinger. « MOR for the MSFEM of the Eddy Current Problem in Linear Laminated Media ». Dans 9th Vienna Conference on Mathematical Modelling. ARGESIM Publisher Vienna, 2018. http://dx.doi.org/10.11128/arep.55.a55284.
Texte intégralSchöbinger, Markus, Joachim Schöberl et Karl Hollaus. « MSFEM for the Linear 2D1D-Problem of Eddy Currents in Thin Iron Sheets ». Dans 9th Vienna Conference on Mathematical Modelling. ARGESIM Publisher Vienna, 2018. http://dx.doi.org/10.11128/arep.55.a55285.
Texte intégralSchobinger, Markus, et Karl Hollaus. « A Novel MSFEM Approach Based on the A-Formulation for Eddy Currents in Iron Sheets ». Dans 2022 IEEE 20th Biennial Conference on Electromagnetic Field Computation (CEFC). IEEE, 2022. http://dx.doi.org/10.1109/cefc55061.2022.9940800.
Texte intégralSchobinger, Markus, et Karl Hollaus. « A Computationally Cheap Error Estimator for the 3D Eddy Current Problem Using a MSFEM Approach Based on the A-Formulation ». Dans 2022 IEEE 20th Biennial Conference on Electromagnetic Field Computation (CEFC). IEEE, 2022. http://dx.doi.org/10.1109/cefc55061.2022.9940671.
Texte intégralKoruk, Hasan, et Kenan Y. Sanliturk. « Assessment of Modal Strain Energy Method : Advantages and Limitations ». Dans ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/esda2012-82281.
Texte intégralWang, Xiaowei, Liying Cheng, Danyang Huang, Xuanshuang Gao, Daili Liang, Liuye He, Zhimei Zhang, Nan Li et Wenjun Tan. « Segmentation of pulmonary vessels based on MSFM method ». Dans 2020 IEEE International Conference on E-health Networking, Application & Services (HEALTHCOM). IEEE, 2021. http://dx.doi.org/10.1109/healthcom49281.2021.9399043.
Texte intégralFei Wang, Sixin Liu et Xinxin Qu. « Ray-based crosshole radar traveltime tomography using MSFM method ». Dans 15th International Conference on Ground-Penetrating Radar (GPR) 2014. IEEE, 2014. http://dx.doi.org/10.1109/icgpr.2014.6970494.
Texte intégralXu, Yiwen, Dengfeng Liu, Zhiquan Lin, Tiesong Zhao et Nian He. « MSFEN-AM : A Non-intrusive Load Identification Method for Power Saving ». Dans 2023 IEEE 11th International Conference on Information, Communication and Networks (ICICN). IEEE, 2023. http://dx.doi.org/10.1109/icicn59530.2023.10393122.
Texte intégralKumar, Komal, Balakrishna Pailla, Kalyan Tadepalli et Sudipta Roy. « Robust MSFM Learning Network for Classification and Weakly Supervised Localization ». Dans 2023 IEEE/CVF International Conference on Computer Vision Workshops (ICCVW). IEEE, 2023. http://dx.doi.org/10.1109/iccvw60793.2023.00258.
Texte intégralRapports d'organisations sur le sujet "MsFEM"
Hilmer, R. V. A Magnetospheric Neutral Sheet-Oriented Coordinate System for MSM and MSFM Applications. Fort Belvoir, VA : Defense Technical Information Center, juillet 1997. http://dx.doi.org/10.21236/ada338067.
Texte intégral