Results 61 to 70 of about 210,410 (185)

Fast Online Generalized Multiscale Finite Element Method using Constraint Energy Minimization

, 2017
Local multiscale methods often construct multiscale basis functions in the offline stage without taking into account input parameters, such as source terms, boundary conditions, and so on.
Chung, Eric T., Efendiev, Yalchin, Leung, Wing Tat   +2 more
core   +1 more source

A Multiscale Feature Learning Scheme Based on Deep Learning for Industrial Process Monitoring and Fault Diagnosis

IEEE Access, 2019
Considering that industrial data exhibit nonlinearity, high dimensionality and inherent multiscale characteristics, this paper proposes an intelligent industrial process monitoring and fault diagnosis method based on the discrete wavelet transform and ...
Jing Yuan, Ying Tian
doaj   +1 more source

Learning Algorithms for Coarsening Uncertainty Space and Applications to Multiscale Simulations

Mathematics, 2020
In this paper, we investigate and design multiscale simulations for stochastic multiscale PDEs. As for the space, we consider a coarse grid and a known multiscale method, the generalized multiscale finite element method (GMsFEM).
Zecheng Zhang, Eric T. Chung, Yalchin Efendiev, Wing Tat Leung   +3 more
doaj   +1 more source

A Multiscale Compositional Numerical Study in Tight Oil Reservoir: Incorporating Capillary Forces in Phase Behavior Calculation

Applied Sciences
Tight oil reservoirs offer significant development potential. Due to the pronounced capillary forces in their nanopores, phase behavior differs markedly from that in conventional reservoirs, challenging traditional equations of state and numerical ...
Junqiang Wang, Li Wu, Qian Sun, Ruichao Zhang, Wenbin Chen, Haitong Yang, Shuoliang Wang   +6 more
doaj   +1 more source

A Multiscale Method for Porous Microstructures [PDF]

Multiscale Modeling & Simulation, 2016
In this paper we develop a multiscale method to solve problems in complicated porous microstructures with Neumann boundary conditions. By using a coarse-grid quasi-interpolation operator to define a fine detail space and local orthogonal decomposition, we construct multiscale corrections to coarse-grid basis functions with microstructure. By truncating
Brown, Donald L., Peterseim, Daniel
openaire   +3 more sources

Coupled continuum hydrodynamics and molecular dynamics method for multiscale simulation [PDF]

, 2011
We present a new hybrid methodology for carrying out multiscale simulations of flow problems lying between continuum hydrodynamics and molecular dynamics, where macro/micro lengthscale separation exists only in one direction.
Borg, Matthew Karl, Lockerby, Duncan A., Reese, Jason   +2 more
core  

An adaptive GMsFEM for high-contrast flow problems

, 2013
In this paper, we derive an a-posteriori error indicator for the Generalized Multiscale Finite Element Method (GMsFEM) framework. This error indicator is further used to develop an adaptive enrichment algorithm for the linear elliptic equation with ...
Chung, Eric T., Efendiev, Yalchin, Li, Guanliang   +2 more
core   +1 more source

Refined Composite Multivariate Multiscale Dispersion Entropy and Its Application to Fault Diagnosis of Rolling Bearing

IEEE Access, 2019
Many nonlinear dynamic and statistic methods, including multiscale sample entropy (MSE) and multiscale fuzzy entropy (MFE), have been widely studied and employed to fault diagnosis of the rolling bearing. Multiscale dispersion entropy (MDE) is a powerful
Congzhi Li, Jinde Zheng, Haiyang Pan, Jinyu Tong, Yifang Zhang   +4 more
doaj   +1 more source

A Hierarchical Multiscale Super-Pixel-Based Classification Method for Extracting Urban Impervious Surface Using Deep Residual Network From WorldView-2 and LiDAR Data

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2019
High-resolution optical imagery can provide detailed information of urban land objects for impervious surface extraction, while airborne light detection and ranging (LiDAR) data can provide height features of land objects.
Mengfan Wu, Xiangwei Zhao, Zhongchang Sun, Huadong Guo   +3 more
doaj   +1 more source

Size-dependent heat conduction of thermal cellular structures: A surface-enriched multiscale method

Defence Technology
This paper examined how microstructure influences the homogenized thermal conductivity of cellular structures and revealed a surface-induced size-dependent effect. This effect is linked to the porous microstructural features of cellular structures, which
Xiaofeng Xu, Junfeng Li, Xuanhao Wu, Ling Ling, Li Li   +4 more
doaj   +1 more source