Results 81 to 90 of about 6,302 (292)
Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.Quadrotor unmanned aerial vehicle control is critical to maintain flight safety and efficiency, especially when facing external disturbances and model uncertainties. This article presents a robust reinforcement learning control scheme to deal with these challenges.
Yu Cai +3 more
wiley +1 more source
Effects of small spatial variation of the reproduction rate in a two species competition model
Electronic Journal of Differential Equations, 2010 Of concern is the effect of a small spatially inhomogeneous perturbation of the reproduction rate of the first species in a two-species Lotka-Volterra competition-diffusion problem with spatially homogeneous reaction terms.
Georg Hetzer, Tung Nguyen, Wenxian Shen
doaj
A New Analytical Method for Stochastic Response of Structure-Damper System
Electronic Journal of Structural Engineering, 2009 Fundamental principles from structural dynamics, pseudo excitation method and perturbation techniques are used to develop a new fast stochastic method for seismic analysis of the combined structuredamper system.
Wei Guo, Hong-nan Li, Guo-huan Liu
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Eigenvalue problems for nonsmoothly perturbed domains
Journal of Differential Equations, 1991 Let \(\Omega_ 0\), \(D\subset\mathbb{R}^ N\) be bounded, connected and smooth domains and \(R\) a connected set such that there exist \(\alpha,\beta\) satisfying \[ \{(x,y)\in\mathbb{R}\times\mathbb{R}^{N-1}: | x|
José M. Arrieta, Jack K. Hale, Qing Han
openaire +3 more sources
Advanced Intelligent Systems, EarlyView.The combination of a parity‐time symmetry wireless technology with a cholesterol sensor integrated into a smart contact lens enables high‐sensitivity cholesterol sensing at low concentration. Cholesterol plays a critical role in physiological functions, but elevated levels increase the risk of cardiovascular disease.
Yang Cui +4 more
wiley +1 more source
Threshold Effects for the Generalized Friedrichs Model with the Perturbation of Rank One
Abstract and Applied Analysis, 2012 A family Hμ(p), μ>0, p∈𝕋2 of the Friedrichs models with the perturbation of rank one, associated to a system of two particles, moving on the two-dimensional lattice ℤ2 is considered. The existence or absence of the unique eigenvalue of the operator Hμ(p)
Saidakhmat Lakaev +2 more
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Eigenvalue spectrum of the spheroidal harmonics: A uniform asymptotic analysis
Physics Letters B, 2015 The spheroidal harmonics Slm(θ;c) have attracted the attention of both physicists and mathematicians over the years. These special functions play a central role in the mathematical description of diverse physical phenomena, including black-hole ...
Shahar Hod
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Perturbations of the spectrum of nonlinear eigenvalue problems
Journal of Mathematical Analysis and Applications, 1978 In the application of nonlinear eigenvalue problems, we are frequently faced with a degree of uncertainty concerning the description of the region or the values of the coefficients in both the differential equation and the boundary conditions. As with linear eigenvalue problems, it is therefore of interest to ascertain whether the “spectrum” of such ...
Graeme C. Wake, L.Ju Fradkin
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Advanced Intelligent Systems, EarlyView.This review explores how shape‐changing structures—origami, bistable, and laminate structures—enable multifunctionality in soft robotics and metamaterials. Starting from structural design, it examines core principles, real‐world applications, and ongoing challenges.
Lingchen Kong, Yaoyao Fiona Zhao
wiley +1 more source
A Simple Matrix Approach to Determination of the Helium Atom Energies
Jurnal Penelitian Fisika dan Aplikasinya, 2019 Calculation of He atomic energy levels using the first order perturbation theory taught in the Basic Quantum Mechanics course has led to relatively large errors.
Redi Kristian Pingak +2 more
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