Results 111 to 120 of about 27,675 (302)

A Survey of Interlayer Interaction Models for Graphene and Other 2D Materials

Advanced Materials Interfaces, EarlyView.
Van der Waals interactions arising from electronic polarization at atomically close interfaces generate corrugated interlayer energy landscapes that govern normal and tangential tractions. This review presents an overview of quantum, atomistic, analytical, and continuum modeling approaches, highlighting their roles across length scales in capturing ...
Gourav Yadav, Shakti S. Gupta, Roger A. Sauer   +2 more
wiley   +1 more source

On the expansion formula for a class of Dirac operator with discontinuous coefficient

, 2009
In this paper we consider a first order differential equation system with a discontinuous coefficient and spectral parameter dependent boundary condition in the half line.
Çöl, Aynur, Mamedov, Kh. R.
core  

Stability of discontinuous diffusion coefficients and initial conditions in an inverse problem for the heat equation

, 2007
International audienceWe consider the heat equation with a discontinuous diffusion coefficient and give uniqueness and stability results for both the diffusion coefficient and the initial condition from a measurement of the solution on an arbitrary part ...
Gaitan, Patricia, Le Rousseau, Jérôme, Benabdallah, Assia   +2 more
core   +1 more source

An adaptive composite discontinuous Galerkin method for elliptic problems on complicated domains with discontinuous coefficients

, 2020
In this paper, we introduce the multi-region discontinuous Galerkin composite finite element method (MRDGCFEM) with hp-adaptivity for the discretization of second-order elliptic partial differential equations with discontinuous coefficients.
Giani, S.
core   +1 more source

Regulation characteristics of a step-down pulse regulator in continuous and discontinuous conduction mode

Electrical engineering & Electromechanics
Introduction. Pulse regulators (PRs) are widely used to regulate and stabilize the supply voltage of DC consumers. The main characteristic of any regulator is its regulation characteristic.
V. Y. Romashko, L. M. Batrak
doaj   +1 more source

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

Advanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz, Yaroslav Mudryk, Jun Cui, Lucas Griffith, Duane D. Johnson, Julie Slaughter   +5 more
wiley   +1 more source

Dynamic frictional contact for elastic viscoplastic material

Electronic Journal of Differential Equations, 2007
Using a general theory for evolution inclusions, existence and uniqueness theorems are obtained for weak solutions to a frictional dynamic contact problem for elastic visco-plastic material.
Kenneth L. Kuttler
doaj  

Advanced Design for Weakly Coupled Resonators by Automatic Active Optimization

Advanced Materials Technologies, EarlyView.
An Automatic Active Optimization (AAO) strategy integrates machine learning predictors and genetic algorithms in a closed‐loop workflow. By iteratively expanding its dataset with new discoveries, AAO overcomes the limits of conventional methods. This approach finds superior microstructural designs beyond the initial sample space. We demonstrate this on
Wei Yue, Yuan Gao, Fanping Sui, Jason Wang, Megan Teng, Peggy Tsao, Huicong Deng, Yande Peng, Liwei Lin   +8 more
wiley   +1 more source

A bilinear immersed finite volume element method for the diffusion equation with discontinuous coefficient

, 2009
This paper is to present a finite volume element (FVE) method based on the bilinear immersed finite element (IFE) for solving the boundary value problems of the diffusion equation with a discontinuous coefficient (interface problem).
He, X, Lin, T, Lin, Tao, Lin, Yanping, He, Xiaoming, Lin, Y   +5 more
core  

Uniqueness and Hölder stability of discontinuous diffusion coefficients in three related inverse problems for the heat equation

, 2007
We consider the heat equation ∂ t y − div(c∇y) = H with a discontinuous coefficient in three connected situations. We give uniqueness and stability results for the diffusion coefficient c(·) in the main case from measurements of the solution on an ...
Poisson, Olivier
core   +1 more source