Results 51 to 60 of about 81,469 (234)

A nested Krylov subspace method to compute the sign function of large complex matrices [PDF]

open access: yes, 2011
We present an acceleration of the well-established Krylov-Ritz methods to compute the sign function of large complex matrices, as needed in lattice QCD simulations involving the overlap Dirac operator at both zero and nonzero baryon density.
Bloch   +22 more
core   +1 more source

Experimental Modal Analysis‐Driven Gaussian Process Regression Modeling of Rectangular Steel Beams With Various Hole Geometries

open access: yesInternational Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Understanding the dynamic behavior of structural components is crucial for optimizing performance and ensuring structural integrity. This study presents a new method that combines a systematic experimental investigation of four distinct hole geometries (circular, square, compact rectangular, and long rectangular) with varying hole counts, all ...
Amir Hossein Rabiee   +3 more
wiley   +1 more source

Free and Forced Vibration Characteristics Analysis of a Multispan Timoshenko Beam Based on the Ritz Method

open access: yesShock and Vibration, 2021
The uniform formulation of dynamic vibration analysis of multispan beams is presented by using an efficient domain decomposition method in this paper.
Cong Gao   +5 more
doaj   +1 more source

Transient vibration analysis of a completely free plate using modes obtained by Gorman's superposition method [PDF]

open access: yes, 2010
This paper shows that the transient response of a plate undergoing flexural vibration can be calculated accurately and efficiently using the natural frequencies and modes obtained from the superposition method.
Ilanko, Sinniah, Yusuke, Mochida
core   +2 more sources

Bending Analysis of Thickness‐ and Shear‐Deformable Materially Imperfect Composite Shells With von Kármán‐Type Geometric Nonlinearities

open access: yesInternational Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Geometrically nonlinear static analysis of materially imperfect composite doubly curved shells is investigated via the generalised differential quadrature method. The effects of both shear and thickness deformation are considered through a thickness‐ and shear‐deformable third‐order theory formulated in curvilinear coordinates, while the ...
Behrouz Karami   +3 more
wiley   +1 more source

Righting Past Wrongs Through Restorative Justice: Managerial Motivations for Collaboration

open access: yesNonprofit Management and Leadership, EarlyView.
ABSTRACT Nonprofits are crucial to state collaborations as their embedded nature in communities allows them to gain the trust necessary to facilitate change and enhance strengths. As nonprofits collaborate with the public sector to tackle systemic challenges, understanding managerial motivations for collaboration and implications for social change is ...
Kara L. Lawrence   +2 more
wiley   +1 more source

Free Vibration Of Functionally Graded Carbon Nanotube Reinforced Composite Annular Sector Plate With General Boundary Supports

open access: yesCurved and Layered Structures, 2018
In this paper, an efficient and unified approach for free vibration analysis of the moderately thick functionally graded carbon nanotube reinforced composite annular sector plate with general boundary supports is presented by using the Ritz method and ...
Pang Fuzhen   +4 more
doaj   +1 more source

On the Methods of Rayleigh-Ritz-Weinstein [PDF]

open access: yesProceedings of the American Mathematical Society, 1952
The Rayleigh-Ritz-Weinstein methods are concerned with the connection between eigenvalues of a completely continuous symmetric operator in a Hilbert space and the eigenvalues of its projection into a subspace X of H such that the difference Hex-x is finitedimensional.
openaire   +1 more source

Incorporating soil biological and functional attributes to advance ecological restoration

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Earth is currently experiencing a mass extinction crisis, predominantly driven by anthropogenic activities, with land use change causing widespread loss and degradation of native ecosystems and indigenous species. There is an urgent need to halt this trend and restore degraded habitat to preserve biodiversity and protect threatened plants and animals ...
Uffe N. Nielsen   +3 more
wiley   +1 more source

Buckling Analysis of Laminated Composite Plate with Different Boundary Conditions using modified Fourier series

open access: yesJournal of Engineering, 2019
Buckling analysis of a laminated composite thin plate with different boundary conditions subjected to in-plane uniform load are studied depending on classical laminated plate theory; analytically using (Rayleigh-Ritz method).
Widad I. Majeed   +1 more
doaj   +1 more source

Home - About - Disclaimer - Privacy