Results 21 to 30 of about 4,543,260 (298)

Frequency extrapolation in the integral equationMEI [PDF]

open access: yesElectronics Letters, 1996
Peer ...
Rius Casals, Juan Manuel   +3 more
openaire   +2 more sources

Design of 2D TeraHertz band-gap photonic waveguides using an accelerated integral equation technique [PDF]

open access: yes, 2009
This paper describes the application of the buffered block forward backward (BBFB) method to the problem of modeling 2D terahertz (THz) photonic band gap waveguides at the frequency of 3 THz.
D. Bogusevschi   +7 more
core   +2 more sources

Frequency-Weighted Balancing Related Controller Reduction [PDF]

open access: yes, 2002
The efficient solution of a class of controller approximation problems by using frequency-weighted balancing related model reduction approaches is considered.
A. Varga   +3 more
core   +1 more source

Hexagonal vs. Rectilinear Grids for Explicit Finite Difference Schemes for the Two-dimensional Wave Equation [PDF]

open access: yes, 2013
Finite difference schemes for the 2-D wave equation operating on hexagonal grids and the accompanyingnumerical dispersion properties have received little attention in comparison to schemes operating on rectilinear grids.
Stefan Bilbao   +3 more
core   +1 more source

Improved equation to describe the induction motor currents during nearby three‐phase short‐circuits

open access: yesIET Electric Power Applications, 2023
This article shows an improved equation to describe the induction motor currents during a three‐phase short‐circuit near to motor terminals. The proposed equation considers three details which are not in the equation shown in the IEEE Std.
Elmer Sorrentino, Andres Vera
doaj   +1 more source

Nonlinear Schrödinger equation and frequency saturation [PDF]

open access: yesAnalysis & PDE, 2012
We propose an approach that permits to avoid instability phenomena for the nonlinear Schrodinger equations. We show that by approximating the solution in a suitable way, relying on a frequency cut-off, global well-posedness is obtained in any Sobolev space with nonnegative regularity.
openaire   +4 more sources

High-Frequency Solutions to the Constraint Equations

open access: yesCommunications in Mathematical Physics, 2023
36 pages, revised version after referee reports, accepted in Communications in Mathematical ...
openaire   +2 more sources

Fast computation of the nonlocal boundary condition in finite difference parabolic equation radiowave propagation simulations [PDF]

open access: yes, 2008
Finite difference parabolic equation method (FD-PEM) codes using a nonlocal boundary condition to model radiowave propagation over electrically large domains, require the computation of time consuming spatial convolution integrals. For the first time, we
Mias, Christos
core   +1 more source

Day-Ahead Scheduling Considering Demand Response as a Frequency Control Resource

open access: yesEnergies, 2017
The development of advanced metering technologies makes demand response (DR) able to provide fast response services, e.g., primary frequency control. It is recognized that DR can contribute to the primary frequency control like thermal generators.
Yu-Qing Bao   +4 more
doaj   +1 more source

Construction and Optimization Techniques for High Order Schemes for the Two-dimensional Wave Equation [PDF]

open access: yes, 2013
With the advent of high performance parallel computing, audio rate room auralization using finite difference time domain methods is becoming possible in a reasonable computation time. Yet, there are still deficiencies in the methods which are used for this
Stefan Bilbao   +3 more
core   +1 more source

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