Results 91 to 100 of about 1,498,610 (256)
Business Strategy and the Environment, EarlyView.ABSTRACT This study examined how Bitcoin, energy prices, and geopolitical risk interact by examining the first four moments (mean, variance, skewness, and kurtosis) of their return distributions by using wavelet analysis. The findings reveal that the co‐movement patterns of energy index, geopolitical risk index, and Bitcoin prices are time and ...
Pooja Kumari +4 more
wiley +1 more source
Multiscale Finite Element approach for "weakly" random problems and related issues [PDF]
arXiv, 2011 We address multiscale elliptic problems with random coefficients that are a perturbation of multiscale deterministic problems. Our approach consists in taking benefit of the perturbative context to suitably modify the classical Finite Element basis into a deterministic multiscale Finite Element basis.
arxiv
Iterative Oversampling Technique for Constraint Energy Minimizing Generalized Multiscale Finite Element Method in the Mixed Formulation [PDF]
arXiv, 2020 In this paper, we develop an iterative scheme to construct multiscale basis functions within the framework of the Constraint Energy Minimizing Generalized Multiscale Finite Element Method (CEM-GMsFEM) for the mixed formulation. The iterative procedure starts with the construction of an energy minimizing snapshot space that can be used for approximating
arxiv
Battery Energy, EarlyView.Dendritic growth in batteries presents challenges to both performance and safety. In this study, we have successfully developed a two‐dimensional artificial neural network model that accurately identifies consistent growth modes observed in experimental data.
Zirui Zhao +7 more
wiley +1 more source
Communications on Pure and Applied Mathematics, EarlyView.Abstract We analyse and clarify the finite‐size scaling of the weakly‐coupled hierarchical n$n$‐component |φ|4$|\varphi |^4$ model for all integers n≥1$n \ge 1$ in all dimensions d≥4$d\ge 4$, for both free and periodic boundary conditions. For d>4$d>4$, we prove that for a volume of size Rd$R^{d}$ with periodic boundary conditions the infinite‐volume ...
Emmanuel Michta +2 more
wiley +1 more source
Multiscale discontinuous Petrov--Galerkin method for the multiscale elliptic problems [PDF]
arXiv, 2017 In this paper we present a new multiscale discontinuous Petrov--Galerkin method (MsDPGM) for multiscale elliptic problems. This method utilizes the classical oversampling multiscale basis in the framework of Petrov--Galerkin version of discontinuous Galerkin finite element method, allowing us to better cope with multiscale features in the solution. The
arxiv
A review of multiscale numerical modeling of rock mechanics and rock engineering
Deep Underground Science and Engineering, EarlyView.Multiscale numerical methods of rock mechanics and rock engineering are reviewed, and the review results show that more attention should be paid to the development of an advanced constitutive model in addition to numerical techniques themselves. Abstract Rock is geometrically and mechanically multiscale in nature, and the traditional phenomenological ...
Xindong Wei, Zhe Li, Gaofeng Zhao
wiley +1 more source
Review of artificial intelligence applications in geothermal energy extraction from hot dry rock
Deep Underground Science and Engineering, EarlyView.This paper systematically summarized the applications of artificial intelligence (AI) in hot dry rock (HDR) geothermal exploitation and discussed the limitations and opportunities. A novel intelligent HDR exploitation system was proposed to promote the development of HDR toward more efficiency, economy, and intelligence.
Kun Ji +5 more
wiley +1 more source
Three‐Dimensional Graphene Aerogel Materials for Supercapacitors: Strategies and Mechanisms
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.An overview of this review about synthesis and drying of GAs, modified aerogel materials and applications in various types of supercapacitors. Graphene aerogels (GAs) exhibit exceptional potential in energy storage, particularly for high‐capacity supercapacitors (SCs), owing to their unique three‐dimensional (3D) porous structure, high conductivity ...
Xiaobin Gong +4 more
wiley +1 more source
Multiscale Empirical Interpolation for Solving Nonlinear PDEs using Generalized Multiscale Finite Element Methods [PDF]
arXiv, 2014 In this paper, we propose a multiscale empirical interpolation method for solving nonlinear multiscale partial differential equations. The proposed method combines empirical interpolation techniques and local multiscale methods, such as the Generalized Multiscale Finite Element Method (GMsFEM). To solve nonlinear equations, the GMsFEM is used
arxiv