Results 1 to 10 of about 27,050 (116)

Investigating Power Density and the Degree of Nonlinearity in Intrinsic Components of Anesthesia EEG by the Hilbert-Huang Transform: An Example Using Ketamine and Alfentanil. [PDF]

PLoS ONE, 2016
Empirical mode decomposition (EMD) is an adaptive filter bank for processing nonlinear and non-stationary signals, such as electroencephalographic (EEG) signals.
Feng-Fang Tsai, Shou-Zen Fan, Yi-Shiuan Lin, Norden E Huang, Jia-Rong Yeh   +4 more
doaj   +2 more sources

Comprehensive degree of nonlinearity in the dynamic response of high-speed Maglev train

Measurement + Control
The aim of this study is to propose a method for evaluating the comprehensive degree of nonlinearity in the dynamic response of high-speed maglev train system through mathematical modeling and numerical simulation.
Chen Shuangxi
doaj   +2 more sources

Parametric Characteristics and Bifurcation Analysis of Multi-Degree-of-Freedom Micro Gyroscope with Drive Stiffness Nonlinearity

Micromachines, 2019
The dynamic equations of a four-degree-of-freedom micro gyroscope system were developed considering the nonlinearity of driving stiffness, the primary resonance, and the 1:1 internal resonance.
Mingjiang Han, Qichang Zhang, Shuying Hao, Weixiong Li   +3 more
doaj   +3 more sources

Quantum squeezing amplification with a weak Kerr nonlinear oscillator [PDF]

Nature Communications
Quantum squeezed states, with biased quantum noise, have been widely utilized in quantum sensing and quantum error correction applications. However, generating and manipulating these nonclassical states with a large squeezing degree typically requires ...
Yanyan Cai, Xiaowei Deng, Libo Zhang, Zhongchu Ni, Jiasheng Mai, Peihao Huang, Pan Zheng, Ling Hu, Song Liu, Yuan Xu, Dapeng Yu   +10 more
doaj   +2 more sources

Preliminary analysis of nonlinear site response at the S-net seafloor sites during three Mw 7 class earthquakes

Frontiers in Earth Science, 2023
In this paper, we investigated the characteristics of nonlinear site response (NLSR) at 23 S-net seafloor sites using strong-motion records obtained during three Mw 7 class earthquakes that occurred directly beneath the network.
Yadab P. Dhakal, Takashi Kunugi
doaj   +1 more source

Propagation of chirped optical solitons for perturbation higher order nonlinear Schrödinger equation with dual-power law nonlinearity by ϕ6 expansion method

Results in Physics, 2023
New exact solutions for the perturbation higher order nonlinear Schrödinger equation (NLSE) with dual-power law nonlinearity are investigated using the ϕ6 expansion method.
Noha M. Kamel, Hamdy M. Ahmed, Wafaa B. Rabie   +2 more
doaj   +1 more source

Structural changes in the COPD lung and related heterogeneity. [PDF]

PLoS ONE, 2017
This paper proposes a mathematical framework for understanding how the structural changes in the COPD lung reflect in model parameters. The core of the analysis is a correlation between the heterogeneity in the lung as COPD degree changes (GOLD II, III ...
Dana Copot, Robin De Keyser, Eric Derom, Clara Ionescu   +3 more
doaj   +1 more source

A comprehensive study of the delay vector variance method for quantification of nonlinearity in dynamical systems [PDF]

Royal Society Open Science, 2016
Although vibration monitoring is a popular method to monitor and assess dynamic structures, quantification of linearity or nonlinearity of the dynamic responses remains a challenging problem.
V. Jaksic, D. P. Mandic, K. Ryan, B. Basu, V. Pakrashi   +4 more
doaj   +1 more source

Experimental and theoretical study of the features of the amplitude-frequency response features of the anharmonic Duffing oscillator [PDF]

Омский научный вестник: Серия "Авиационно-ракетное и энергетическое машиностроение"
In this paper, experimental waveforms of the bifurcation phenomena in a Duffing oscillator weakly damped by viscous friction. The bifurcation points are found by solving the numerical solution of a harmonically linearized system with respect to the ...
B. A. Kalashnikov, V. V. Bokhan, V. E. Smolko   +2 more
doaj   +1 more source

Oscillator with Time-Variable Degree of Nonlinearity: Theory and Application in Aging of Polymer Composite Structure

Mathematics, 2023
In this paper, a new type of one-degree-of-freedom pure nonlinear oscillator with a time variable degree of nonlinearity is introduced. Namely, the degree of the nonlinearity in the restitution force is not a constant but a ‘slow time’ variable function.
L. Cveticanin, M. Zukovic
doaj   +1 more source