Results 21 to 30 of about 5,859 (117)

Multiple-rank modification of symmetric eigenvalue problem

MethodsX, 2018
Rank-1 modifications applied k-times (k > 1) often are performed to achieve a rank-k modification. We propose a rank- k modification for enhancing computational efficiency. As the first step toward a rank- k modification, an algorithm to perform a rank-2
HyungSeon Oh, Zhe Hu
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Robust Subsynchronous Damping Control of PMSG-Based Wind Farm

Energies, 2023
This paper provides an H∞ robust control strategy for a permanent magnet synchronous generator (PMSG)-based wind farm to realize subsynchronous resonance suppression (SSR) subject to uncertain system distortions and parameter perturbation.
Yun Wang, Fengyun Luo, Chaoyang Long, Guoqing Tao, Ying Xu, Rong Yang   +5 more
doaj   +1 more source

Development of an adjoint flux calculation technique for exact perturbation theory in Monte Carlo transport

EPJ Nuclear Sciences & Technologies
A calculation technique computing the adjoint flux of perturbed system is developed for the exact perturbation theory in Monte Carlo transport. By using a correlated sampling and iterated fission probability methods together, the adjoint flux of ...
Jo Yunki, Lee Deokjung
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THE HYPERBOLIC QUADRATIC EIGENVALUE PROBLEM

Forum of Mathematics, Sigma, 2015
The hyperbolic quadratic eigenvalue problem (HQEP) was shown to admit Courant–Fischer type min–max principles in 1955 by Duffin and Cauchy type interlacing inequalities in 2010 by Veselić.
XIN LIANG, REN-CANG LI
doaj   +1 more source

First and Second-Order Energy Eigenvalues of One-Dimensional Quantum Harmonic and Anharmonic Oscillator with Linear, Quadratic, Cubic and Polynomial Perturbation Potential

ASM Science Journal, 2022
This work is aimed at obtaining the energy eigenvalues for one-dimensional quantum harmonic and anharmonic oscillators perturbed by linear, quadratic, cubic and polynomial potentials.
B.I Madububa, N. I. Achuko, JohnPaul Chiagoziem Mbagwu, C.I Jonas, J.O Ozuomba   +4 more
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Teoría de perturbaciones de Brillouin-Wigner: Oscilador armónico perturbado

Momento, 1993
An harmonic oscillator is subject to a perturbation [Physical Formula] where [Physical Formula] is an eigenket of the momentum operator. The Brillouin-Wigner perturbation theory is applied to solve the eigenvalue equation of the perturbed Hamiltonian.
D. Campos
doaj  

A Modal Perturbation Method for Eigenvalue Problem of Non-Proportionally Damped System

Applied Sciences, 2020
The non-proportionally damped system is very common in practical engineering structures. The dynamic equations for these systems, in which the damping matrices are coupled, are very time consuming to solve.
Danguang Pan, Xiangqiu Fu, Qingjun Chen, Pan Lu, Jinpeng Tan   +4 more
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ON CALCULATION OF MULTIPLE EIGENVALUES OF THE LINEAR OPERATOR-FUNCTION BY REDUCTION PSEUDO-PERTURBATION METHODS

International Islamic University Malaysia Engineering Journal, 2013
: In this article, methods of theory of bifurcations, applies to the problem of retaining of the approximately given multiple eigenvalues and their generalized eigenvectors.
Rakhimov Davran Ganievich
doaj   +1 more source

Analysis of Semi-Blind Channel Estimation in Multiuser Massive MIMO Systems With Perturbations

IEEE Access, 2019
In the massive multiple-input multiple-output (MIMO) systems, pilot contamination and signal perturbation are two important issues in the semi-blind channel estimation methods.
Cheng Hu, Hong Wang, Rongfang Song
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Exact solution of the relationship between the eigenvalue discreteness and the behavior of eigenstates in Su–Schrieffer–Heeger lattices

New Journal of Physics
The interplay between eigenvalue discreteness and eigenstate localization is a fundamental characteristic of one-dimensional Su–Schrieffer–Heeger (SSH) lattices.
Huitong Wei, Xiumei Wang, Xingping Zhou
doaj   +1 more source