Results 21 to 30 of about 697,718 (284)

On artifact solutions of semi-analytic methods in nonlinear dynamics [PDF]

open access: yes, 2018
Nonlinear dynamics is a topic of permanent interest in mechanics since decades. The authors have recently published some results on a very classical topic, the dynamics of a softening Duffing oscillator under harmonic excitation focusing especially on ...
Lentz, Lukas, Wagner, Utz von
core   +1 more source

On an atomic decomposition in Banach spaces [PDF]

open access: yesSahand Communications in Mathematical Analysis, 2018
An atomic decomposition is considered in Banach space.  A method for constructing an atomic decomposition of Banach  space, starting with atomic decomposition of  subspaces  is presented. Some relations between them are established.
Telman Gasymov, Chingiz Hashimov
doaj  

Harmonic analysis

open access: yes2004 IEEE Electro/Information Technology Conference, 2004
This paper describes a method of calculating the transforms, currently obtained via Fourier and reverse Fourier transforms. The method allows calculating efficiently the transforms of a signal having an arbitrary dimension of the digital representation by reducing the transform to a vector-to-circulant matrix multiplying.
openaire   +2 more sources

Study on resonance characteristic of continuous co‐phase traction power supply system

open access: yesIET Generation, Transmission & Distribution, 2023
In order to solve the power quality problems and eliminate the neutral sections in the railway, the implementation of the continuous co‐phase traction power supply system (CCTPSS) is the development trend of the future. However, various parameters of the
Fan Zhong, Shaofeng Xie
doaj   +1 more source

Unbalance Response Analysis of a Rotor Kit with Two Identical Discs Located Between Bearings

open access: yesTehnički Glasnik, 2023
In this paper, the dynamic behavior of a rotor kit with two identical disks located between the plain bearings was analyzed. Modal and harmonic analysis of this rotor kit configuration were performed in the Ansys software package.
Marko Katinić   +3 more
doaj   +1 more source

Solyanik estimates in harmonic analysis

open access: yes, 2014
Let $\mathcal{B}$ denote a collection of open bounded sets in $\mathbb{R}^n$, and define the associated maximal operator $M_{\mathcal{B}}$ by $$ M_{\mathcal{B}}f(x) := \sup_{x \in R \in \mathcal{B}} \frac{1}{|R|}\int_R |f|.
A. Córdoba   +3 more
core   +1 more source

An application of the 3-dimensional q-deformed harmonic oscillator to the nuclear shell model [PDF]

open access: yes, 1997
An analysis of the construction of a q-deformed version of the 3-dimensional harmonic oscillator, which is based on the application of q-deformed algebras, is presented.
Iudice, N. Lo   +3 more
core   +3 more sources

PQ and Harmonic Assessment Issues on Low-Cost Smart Metering Platforms: A Case Study

open access: yesSensors, 2020
This paper presents a feasibility study on how to implement power quality (PQ) metrics in a low-cost smart metering platform. The study is aimed at verifying the possibility of implementing PQ monitoring in distribution networks without replacing ...
Giovanni Artale   +9 more
doaj   +1 more source

Power Quality Issues and Mitigation for Electric Grids with Wind Power Penetration

open access: yesApplied Sciences, 2020
Large penetration of wind energy systems into electric-grids results in many power quality problems. This paper presents a classification of power quality issues, namely harmonics and short-duration voltage variation observed due to the integration of ...
Sulaiman A. Almohaimeed   +1 more
doaj   +1 more source

Numerical Algorithm for Dynamic Impedance of Bridge Pile-Group Foundation and Its Validation

open access: yesAlgorithms, 2021
The characteristics of bridge pile-group foundation have a significant influence on the dynamic performance of the superstructure. Most of the existing analysis methods for the pile-group foundation impedance take the trait of strong specialty, which ...
Chenyu Wang   +3 more
doaj   +1 more source

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