Results 81 to 90 of about 106,166 (304)

A Concise and Efficient MLFMA Scheme for Electromagnetic Surface Integral Equations From Dielectric Objects

open access: yesIEEE Access, 2020
In the surface field integral equations (SIEs) from three-dimensional homogeneous dielectric objects, the equivalence electric and magnetic currents on the discontinuous interfaces between different homogeneous media are two independent sources. When the
Wei-Dong Li, Jun-Xia Miao, Wei Hong
doaj   +1 more source

Implicit methods for the simple wave equation

open access: yes, 1984
A family of finite difference methods is developed for the numerical solution of the simple wave equation. Local truncation errors are cal- culated for each member of the family and each is analyzed for stability.
Tirmizi, S I A, Twizell, E H
core  

Finite and infinite element method applied to water wave diffraction problems [PDF]

open access: yes, 1999
In this work, three types of infinite elements are developed to solve the problem of linear water wave diffraction by objects in a 2D unbounded domain. The infinite elements, which model the far field wave potential stretching to infinity, are coupled to
Baghbani, A., Baghbani, Alireza
core  

From Shear to Sound: Mechanics–Acoustics Mapping of TPMS Lattices

open access: yesAdvanced Engineering Materials, EarlyView.
Triply periodic minimal surface (TPMS) lattices are mapped across mechanical and acoustic performance, revealing that descriptors validated in compression fail under shear. First‐time comparison with trusses included. A transition from porous to resonance‐driven absorption emerges at 25% density.
Lucía Doyle   +3 more
wiley   +1 more source

A Force Method Model for Dynamic Analysis of Flat-Sag Cable Structures

open access: yesShock and Vibration, 2009
A new force method is proposed for analysing the dynamic behaviour of oscillating cables with small sags. The accepted dynamic model of such cables reduces to a partial differential equation (the equation of motion) and an integral equation (the ...
Xing Ma, John W. Butterworth
doaj   +1 more source

Stable And Unstable Solitary-Wave Solutions Of The Generalized Regularized Long-Wave Equation

open access: yes, 2007
. Investigated here are interesting aspects of the solitarywave solutions of the generalized Regularized Long-Wave equation u t + u x + ff(u p ) x \Gamma fiu xxt = 0: For p ?
WILLIAM R. MCKINNEY   +4 more
core  

Designing Polymer Nanocomposites for X‐Ray Shielding: Mechanisms, Architectures, and Scalable Processing

open access: yesAdvanced Engineering Materials, EarlyView.
This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele   +2 more
wiley   +1 more source

Precipitation Simulations of the O‐Phase in Ti2AlNb Alloys Processed by Laser Powder Bed Fusion

open access: yesAdvanced Engineering Materials, EarlyView.
Simulated and experimental evolution of the O‐phase volume fraction during postprocessing of a Ti‐21Al‐25Nb (at.%) alloy processed by laser powder bed fusion. With results of sensitivity to input parameters from a thorough and quantified analysis, the interfacial energy matrix/precipitate is the most relevant input parameter for the simulation of the O‐
Silvana Tumminello   +7 more
wiley   +1 more source

COMPARATIVE ANALYSIS OF 3D RTM IMPLEMENTATION STRATEGIES FOR AN EFFICIENT USE OF MEMORY IN A SINGLE GPU

open access: yesCT&F Ciencia, Tecnología & Futuro
Reverse-Time Migration (RTM) is a two-way wave-equation based method used to generate images of the Earth's subsurface. RTM has been successfully used in seismic imaging as it allows defining complex structural areas.
William-A Salamanca   +2 more
doaj   +1 more source

Experimental and Numerical Modal Analysis of Composite Sandwich Structures Using Surfboards as Model Systems

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents an experimental and numerical modal investigation of composite sandwich structures using surfboards as model systems. By comparing different core materials and reinforcement strategies, the study demonstrates how local stiffeners influence vibrational response and introduce characteristic modal features, highlighting modal ...
Brett Connellan   +4 more
wiley   +1 more source

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