Results 31 to 40 of about 166,841,558 (307)

Stability Analysis of a Strongly Displacement Time-Delayed Duffing Oscillator Using Multiple Scales Homotopy Perturbation Method [PDF]

open access: yesJournal of Applied and Computational Mechanics, 2018
In the present study, some perturbation methods are applied to Duffing equations having a displacement time-delayed variable to study the stability of such systems.
Yusry El-Dib
doaj   +1 more source

Source Location Identification of Distribution-Level Electric Network Frequency Signals at Multiple Geographic Scales [PDF]

open access: yes, 2017
The distribution-level electric network frequency (ENF) extracted from an electric power signal is a promising forensic tool for multimedia recording authentication.
Till, Micah J.   +14 more
core   +1 more source

Testing the method of multiple scales and the averaging principle for model parameter estimation of quasiperiodic two time-scale models [PDF]

open access: yes, 2022
summary:Some dynamical systems are characterized by more than one time-scale, e.g. two well separated time-scales are typical for quasiperiodic systems.
Matonoha, Ctirad, Papáček, Štěpán
core   +1 more source

ANALYSIS OF NONLINEAR FORCED VIBRATIONS OF FRACTIONALLY DAMPED SUSPENSION BRIDGES SUBJECTED TO THE ONE-TO-ONE INTERNAL RESONANCE

open access: yesInternational Journal for Computational Civil and Structural Engineering, 2020
Nonlinear force driven coupled vertical and torsional vibrations of suspension bridges, when the frequency of an external force is approaching one of the natural frequencies of the suspension system, which, in its turn, undergoes the conditions of the ...
Marina Shitikova, Aleks Katembo
doaj   +1 more source

Analysis of a Wind-Driven Power Generation System with Root Slapping Mechanism

open access: yesApplied Sciences
This study introduces a groundbreaking slap-type Vibration Energy Harvesting (VEH) system, leveraging a rotating shaft with magnets to induce vibrations in an adjacent elastic steel sheet through magnetic repulsion.
Yi-Ren Wang, Jin-Wei Chang, Chen-Yu Lin
doaj   +1 more source

Analytical and Experimental Studies of Double Elastic Steel Sheet (DESS) Vibration Energy Harvester System

open access: yesEnergies, 2020
This study provides a double elastic steel sheet (DESS) piezoelectric energy harvester system, in which the vibration generated by the deformation and clap of two elastic steel sheets is assisted by a piezo patch to generate electric energy.
Yi-Ren Wang, Ming-Syun Wong, Bo-Yan Chen
doaj   +1 more source

An Object-Based Approach for Mapping Crop Coverage Using Multiscale Weighted and Machine Learning Methods

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
Accurate mapping of crop distribution on Earth's surface aids in predicting grain production. Pattern classification along with remote sensing imagery can facilitate traditional manual field measurement techniques using machine learning.
Zengwei Tang   +5 more
doaj   +1 more source

Modelling of framework materials at multiple scales: current practices and open questions [PDF]

open access: yes, 2019
The last decade has seen an explosion of the family of framework materials and their study, both from the experimental and computational point of view.
Siwar, Chibani   +2 more
core   +1 more source

Technical note: Multiple wavelet coherence for untangling scale-specific and localized multivariate relationships in geosciences [PDF]

open access: yesHydrology and Earth System Sciences, 2016
The scale-specific and localized bivariate relationships in geosciences can be revealed using bivariate wavelet coherence. The objective of this study was to develop a multiple wavelet coherence method for examining scale-specific and localized ...
W. Hu, B. C. Si
doaj   +1 more source

A Robust Method for Large‐Scale Multiple Hypotheses Testing [PDF]

open access: yesBiometrical Journal, 2010
AbstractWhen drawing large‐scale simultaneous inference, such as in genomics and imaging problems, multiplicity adjustments should be made, since, otherwise, one would be faced with an inflated type I error. Numerous methods are available to estimate the proportion of true null hypotheses π0, among a large number of hypotheses tested.
Seungbong, Han   +2 more
openaire   +2 more sources

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