Results 51 to 60 of about 674,252 (208)
Medical Image Hybrid Watermark Algorithm Based on Frequency Domain Processing and Inception v3
Advanced Intelligent Systems, EarlyView.Frequency domain processing and Inceptionv3 method is used in this article for digital image watermarking of medical images. The algorithm extracts feature vectors from medical images using discrete wavelet transform and discrete cosine transform, enhancing the robustness of the image watermark With the widespread use of digital medical images in ...
Yu Fan +4 more
wiley +1 more source
Machine Learning in Nonlinear Dynamical Systems [PDF]
arXiv, 2020 In this article, we discuss some of the recent developments in applying machine learning (ML) techniques to nonlinear dynamical systems. In particular, we demonstrate how to build a suitable ML framework for addressing two specific objectives of relevance: prediction of future evolution of a system and unveiling from given time-series data the ...
arxiv
Nonlinear time-series analysis revisited
, 2015 In 1980 and 1981, two pioneering papers laid the foundation for what became known as nonlinear time-series analysis: the analysis of observed data---typically univariate---via dynamical systems theory.
Bradley, Elizabeth, Kantz, Holger
core +1 more source
Advanced Intelligent Systems, EarlyView.This study investigates 3D locomotion of surface‐rolling microrobots, revealing a trade‐off between hydrodynamic wall effects and gravity. Through experiments and simulations, it explores how robot size, inclination angle, actuation frequency, and surface microtopography affect the 3D locomotion.
Myungjin Park +5 more
wiley +1 more source
Deep Underground Science and Engineering, EarlyView.Hydraulic fracturing in tight sandstone and fracture propagation characteristics using backscattered electron‐scanning electron microscope (BSE‐SEM) images. Abstract This study focuses on hydraulic fracturing experiments conducted under triaxial conditions on tight sandstone specimens from Shivpuri district, Madhya Pradesh, India.
Pankaj Rawat, Narendra Kumar Samadhiya
wiley +1 more source
Nonlinear Dynamics Semi-classical Model of Quantum Spin [PDF]
International Journal of Advanced Research in Physical Science
2017,4(3) : 1-3, 2018 A nonlinear dynamics semi-classical model is used to show that standard quantum spin analysis can be obtained. The model includes a classically driven nonlinear differential equation with dissipation and a semi-classical interpretation of the torque on a spin magnetic moment in the presence of a realistic magnetic field, which will represent two ...
arxiv
Optimal Piecewise-Linear Approximation of the Quadratic Chaotic Dynamics [PDF]
, 2012 This paper shows the influence of piecewise-linear approximation on the global dynamics associated with autonomous third-order dynamical systems with the quadratic vector fields.
Petrzela, J.
core +1 more source
Discovering governing equations from data: Sparse identification of nonlinear dynamical systems
, 2015 The ability to discover physical laws and governing equations from data is one of humankind's greatest intellectual achievements. A quantitative understanding of dynamic constraints and balances in nature has facilitated rapid development of knowledge ...
Brunton, Steven L. +2 more
core +1 more source
Analysis of Cuttings Transport in Small‐Bore Horizontal Wells Considering Drill String Eccentricity
Energy Science &Engineering, EarlyView.Annular debris volume fraction distribution cloud image at different annular return velocity. ABSTRACT The narrow annulus in small‐bore horizontal wells causes marked differences in cuttings transport compared to conventional horizontal wells. To address this issue, a CFD‐based numerical model for solid‐liquid two‐phase flow in the annulus was ...
An Jintao +7 more
wiley +1 more source
Intermittent generalized synchronization in unidirectionally coupled chaotic oscillators
, 2005 A new behavior type of unidirectionally coupled chaotic oscillators near the generalized synchronization transition has been detected. It has been shown that the generalized synchronization appearance is preceded by the intermitted behavior: close to ...
A. A Koronovskii +7 more
core +1 more source