Results 21 to 30 of about 28,959 (169)

Some results on thermal stress of layered plates and shells by using Unified Formulation [PDF]

open access: yes, 2013
This work presents some results on two-dimensional modelling of thermal stress problems in multilayered structures. The governing equations are written by referring to the Unified Formulation (UF) introduced by the first author.
Argyris J.   +19 more
core   +1 more source

Block Iterative Eigensolvers for Sequences of Correlated Eigenvalue Problems [PDF]

open access: yes, 2013
In Density Functional Theory simulations based on the LAPW method, each self-consistent field cycle comprises dozens of large dense generalized eigenproblems.
Berljafa, Mario, Di Napoli, Edoardo
core   +2 more sources

The Deep Ritz Method for Parametric $p$-Dirichlet Problems

open access: yes, 2022
30 pages, 11 ...
Kaltenbach, Alex, Zeinhofer, Marius
openaire   +2 more sources

Variational Principle of Bogoliubov and Generalized Mean Fields in Many-Particle Interacting Systems [PDF]

open access: yes, 2015
The approach to the theory of many-particle interacting systems from a unified standpoint, based on the variational principle for free energy is reviewed.
Kuzemsky, A. L.
core   +1 more source

Observations and models for needle-tissue interactions [PDF]

open access: yes, 2009
The asymmetry of a bevel-tip needle results in the needle naturally bending when it is inserted into soft tissue. In this study we present a mechanics-based model that calculates the deflection of the needle embedded in an elastic medium.
Misra, Sarthak   +4 more
core   +5 more sources

A Comparison Study of Deep Galerkin Method and Deep Ritz Method for Elliptic Problems with Different Boundary Conditions

open access: yesCommunications in Mathematical Research, 2020
Recent years have witnessed growing interests in solving partial differential equations by deep neural networks, especially in the high-dimensional case. Unlike classical numerical methods, such as finite difference method and finite element method, the enforcement of boundary conditions in deep neural networks is highly nontrivial.
Chen, Jingrun, Du, Rui, Wu, Keke
openaire   +2 more sources

Reaction Pathways Based on the Gradient of the Mean First-Passage Time

open access: yes, 2002
Finding representative reaction pathways is necessary for understanding mechanisms of molecular processes, but is considered to be extremely challenging. We propose a new method to construct reaction paths based on mean first-passage times. This approach
Deyu Lu   +4 more
core   +1 more source

Analysis of nifH-RNA reveals phylotypes related to Geobacter and Cyanobacteria as important functional components of the N2-fixing community depending on depth and agricultural use of soil [PDF]

open access: yes, 2017
In this survey, a total of 80 787 reads and 28 171 unique NifH protein sequences were retrieved from soil RNA. This dataset extends our knowledge about the structure and diversity of the functional diazotrophic communities in agricultural soils from ...
Aguilar, Orlando Mario   +4 more
core   +3 more sources

Linear Stochastic Models of Nonlinear Dynamical Systems

open access: yes, 1998
We investigate in this work the validity of linear stochastic models for nonlinear dynamical systems. We exploit as our basic tool a previously proposed Rayleigh-Ritz approximation for the effective action of nonlinear dynamical systems started from ...
B. A. Finlayson   +17 more
core   +2 more sources

Skyrmionic magnetization configurations at chiral magnet/ferromagnet heterostructures [PDF]

open access: yes, 2015
We consider magnetization configurations at chiral magnet (CM)/ferromagnet (FM) heterostructures. In the CM, magnetic skyrmions and spin helices emerge due to the Dzyaloshinskii-Moriya interaction, which then penetrate into the adjacent FM.
66953   +5 more
core   +2 more sources

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