Results 11 to 20 of about 12,117,820 (296)

Spectral Intrinsic Decomposition Method for Adaptive Signal Representation

open access: yesISRN Signal Processing, 2012
We propose a new method called spectral intrinsic decomposition (SID) for the representation of nonlinear signals. This approach is based on the spectral decomposition of partial differential equation- (PDE-) based operators which interpolate the characteristic points of a signal.
Oumar Niang   +3 more
openaire   +2 more sources

Advanced operator-splitting-based semi-implicit spectral method to solve the binary phase-field crystal equations with variable coefficients [PDF]

open access: yes, 2009
We present an efficient method to solve numerically the equations of dissipative dynamics of the binary phase-field crystal model proposed by Elder et al. [Phys. Rev. B 75, 064107 (2007)] characterized by variable coefficients.
Granasy, L   +5 more
core   +7 more sources

Deterministic numerical solutions of the Boltzmann equation using the fast spectral method [PDF]

open access: yes, 2013
The Boltzmann equation describes the dynamics of rarefied gas flows, but the multidimensional nature of its collision operator poses a real challenge for its numerical solution. In this paper, the fast spectral method [36], originally developed by Mouhot
Reese, Jason M.   +6 more
core   +4 more sources

Mach-Zehnder Interferometer Sensor Curvature Demodulation Method Based on the Orthogonal Decomposition of Spectral Curves

open access: yesIEEE Access, 2020
This paper proposes a curvature demodulation of Mach-Zehnder interferometer (MZI) sensors based on complete spectral information. An MZI sensor composed of two waist-enlarged single mode fibers (SMFs) was fabricated.
Mingyao Liu   +9 more
doaj   +1 more source

Spectral division methods for block generalized Schur decompositions [PDF]

open access: yesMathematics of Computation, 2004
We provide a different perspective of the spectral division methods for block generalized Schur decompositions of matrix pairs. The new approach exposes more algebraic structures of the successive matrix pairs in the spectral division iterations and reveals some potential computational difficulties.
Xiaobai Sun, Enrique S. Quintana-Ortí
openaire   +2 more sources

Comparative Study on Modal Decomposition Methods of Unsteady Separated Flow in Compressor Cascade

open access: yesXibei Gongye Daxue Xuebao, 2020
The present work investigated the vortex structure and fluctuation frequency characteristics generated by boundary layer separation of a high-load compressor cascade using modal decomposition methods.

doaj   +1 more source

Mathematical delay model based on QS with hyperexponential and Erlang distributions

open access: yesФизика волновых процессов и радиотехнические системы, 2022
This article is devoted to the study and obtaining a closed-form solution for the average delay of claims in the queue for a queuing system formed by two flows with hyperexponential and Erlang distributions of intervals.
Veniamin N. Tarasov
doaj   +1 more source

Model parameter estimations of the multi-channel turbulence response from flutter flight tests based on autoregressive spectra

open access: yesJournal of Low Frequency Noise, Vibration and Active Control, 2023
Signal processing of flutter flight test data enables verification of aircraft flutter design, and the signal from a flutter flight test excited by atmospheric turbulence is a particularly important form of the flutter test.
Shiqiang Duan, Hua Zheng
doaj   +1 more source

Spectral solution for a delay system with hyper-Erlang distributions

open access: yesФизика волновых процессов и радиотехнические системы, 2022
The article is devoted to the construction of a mathematical model for delaying claims in a queue in the form of a queuing system described by two flows with the laws of distribution of time intervals shifted to the right by hyper-Erlang distributions of
Veniamin N. Tarasov   +1 more
doaj   +1 more source

Proper Generalized Decomposition method for incompressible Navier–Stokes equations with a spectral discretization [PDF]

open access: yes, 2013
http://dx.doi.org/10.1016/j.amc.2013.02.022Proper Generalized Decomposition (PGD) is a method which consists in looking for the solution to a problem in a separate form.
ALLERY, Cyrille   +2 more
core   +1 more source

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