Results 51 to 60 of about 30,360 (174)
Mathematical Methods in the Applied Sciences, Volume 47, Issue 8, Page 6853-6867, 30 May 2024.Studying Arctic ice formation stays in the focus of research groups over the past decades in the context of ice cover changes, thermal budget and climate agenda in general. Nevertheless, the phenomenon's underlying mechanisms are still not completely understood and described.
Irina Nizovtseva +3 more
wiley +1 more source
The Hardy space of solutions of the generalized Beltrami system [PDF]
, 2007 The article focuses on the hardy space of solutions of the generalized Beltrami system. The Beltrami equation is considered the first-order system on the plane wherein its eigenvalues lie in the upper half-plane with a continuous coefficient.
Soldatov, A. P., Vashchenko, O. V.
core +1 more source
, 2014 In this paper, we present a decentralized variable gain robust controller for a class of large-scale serially connected systems with nonlinear perturbations via piecewise Lyapunov functions.
H. Oya, T. Kubo, K. Hagino
semanticscholar +1 more source
Advanced Intelligent Systems, Volume 6, Issue 5, May 2024.The application of physics‐informed neural networks in modeling and controlling intricate robotic systems is explored. This work accounts for nonconservative effects, combining learning models with first‐principles controllers. The synergy of model‐based and learning‐based techniques ensures precise control and establishes theoretical stability bounds.
Jingyue Liu +2 more
wiley +1 more source
Remarks on conformal invariants for piecewise smooth curves and Wilson loops [PDF]
arXiv, 2023 This short note is some obvious mathematical addendum to our papers on Wilson loops on polygon-like contours with circular edges \cite{Dorn:2020meb,Dorn:2020vzj}. Using the technique of osculating spheres and circles we identify the conformal invariants characterising the kinks (cusps) of generic piecewise smooth curves in 3-dimensional space.
arxiv
IET Control Theory &Applications, Volume 18, Issue 8, Page 977-986, May 2024.Abstract This paper is concerned with the synchronization of stochastic uncertain complex dynamic networks with time‐varying delays. In contrast to existing synchronization network models, the current study considers both internal time‐varying delays and coupling time‐varying delays. By analyzing the two factors (i.e.
Xuhui Guo +3 more
wiley +1 more source
Overapproximating the Reachable Values Set of Piecewise Affine Systems Coupling Policy Iterations with Piecewise Quadratic Lyapunov Functions [PDF]
arXiv, 2015 We have recently constructed a piecewise quadratic Lyapunov function to prove the boundedness of the reachable values set of piecewise affine discrete-time systems. The method developed also provided an overapproximation of the reachable values set.
arxiv
Counterexample-guided computation of polyhedral Lyapunov functions for hybrid systems [PDF]
arXiv, 2022 This paper presents a counterexample-guided iterative algorithm to compute convex, piecewise linear (polyhedral) Lyapunov functions for uncertain continuous-time linear hybrid systems. Polyhedral Lyapunov functions provide an alternative to commonly used polynomial Lyapunov functions.
arxiv
IET Image Processing, Volume 18, Issue 7, Page 1823-1843, 29 May 2024.A chaos‐based image encryption algorithm was coded. The algorithm was then implemented in an Altera RZ‐EasyFPGA board. Finally, the robustness tests were carried out using all the usual metrics. Abstract This paper proposes an image encryption algorithm based on combined 1D chaotic maps. First, a permutation technique was applied.
Alain Fanda Djomo +2 more
wiley +1 more source
, 1999 We investigate some properties of the WKB series for arbitrary analytic potentials and then specifically for potentials $x^N$ ($N$ even), where more explicit formulae for the WKB terms are derived.
Andrews G E +20 more
core +2 more sources