Results 61 to 70 of about 73,396 (227)

Zero Watermarking Using Convolutional Additive Self‐Attention Vision Transformer and Discrete Wavelet Transform‐Variance‐Based Feature Descriptor for Medical Image Security in Mobile Healthcare Services

Advanced Intelligent Systems, EarlyView.
A zero‐watermarking algorithm that combines a refined convolutional additive self‐attention vision transformer (CAS‐ViT) with a discrete wavelet transform variance‐based feature descriptor (DVFD) is proposed for protecting the privacy of medical images in mobile healthcare services.
Pei Liu, Yan Yan, Hao Huang, Ping Wang, Weirong Qin, Xiangjian Zuo, Yongqin Li   +6 more
wiley   +1 more source

Lyapunov Functions to Caputo Fractional Neural Networks with Time-Varying Delays

Axioms, 2018
One of the main properties of solutions of nonlinear Caputo fractional neural networks is stability and often the direct Lyapunov method is used to study stability properties (usually these Lyapunov functions do not depend on the time variable).
Ravi Agarwal, Snezhana Hristova, Donal O’Regan   +2 more
doaj   +1 more source

The Instability Transition for the Restricted 3-Body Problem. III. The Lyapunov Exponent Criterion

, 2011
We establish a criterion for the stability of planetary orbits in stellar binary systems by using Lyapunov exponents and power spectra for the special case of the circular restricted 3-body problem (CR3BP). The centerpiece of our method is the concept of
B. Quarles, Benettin, Catanzarite, Cockell, Cuntz, Duquennoy, Dvorak, Dvorak, Dvorak, Eberle, Eberle, Eggenberger, Fouchard, Froeschlé, Gonczi, Holman, J. Eberle, Jefferys, Lada, Lecar, Lissauer, Lyapunov, M. Cuntz, Malhotra, Milani, Murray, Musielak, Musielak, Patience, Pilat-Lohinger, Rabl, Raghavan, Smith, Szenkovits, Wolf, Yoshida, Z. E. Musielak   +36 more
core   +1 more source

The energy–momentum method for the stability of non-holonomic systems [PDF]

, 1997
In this paper we analyze the stability of relative equilibria of nonholonomic systems (that is, mechanical systems with nonintegrable constraints such as rolling constraints).
Bloch, Anthony M., Marsden, Jerrold E., Zenkov, Dmitry V.   +2 more
core   +5 more sources

Complexity Analysis of Bubble Plumes in Power Law Fluids Based on Chaos Theory

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT In order to reveal the complexity of the internal flow of bubble plume in power law fluid, the flow characteristics and chaotic characteristics of plume are studied by experiment and theory. The chaotic characteristic parameters (correlation dimension D, K entropy, and Lyapunov exponent λ) of gas velocity under different superficial gas ...
Xin Dong, Chong Dong, Can Xue, Meiheng Peng, Ying Feng, Jianwei Zhang, Yinuo Liu   +6 more
wiley   +1 more source

Stability of 1+1 dimensional causal relativistic viscous hydrodynamics

, 2010
The stability of the 1+1 dimensional solution of Israel-Stewart theory is investigated. Firstly, the evolution of the temperature and the ratio of the bulk pressure over the equilibrium pressure of the background is explored.
Adames, Adler, Arsene, Back, Baier, Baier, Chaudhuri, Chaudhuri, Chaudhuri, Chaudhuri, Denicol, Denicol, Eckart, Fries, G.L. Ma, Gyulassy, Heinz, Hiscock, Hiscock, Huovinen, Israel, Israel, Israel, J.W. Li, Kharzeev, Kolb, Kouno, Laine, Landau, Li, Li, Luzum, Meyer, Meyer, Muronga, Muronga, Muronga, Muronga, Paech, Policastro, Pratt, Pratt, Romatschke, Romatschke, Song, Song, Song, Teaney, Torrieri, Torrieri, Xu, Y.G. Ma   +51 more
core   +1 more source

Risk‐aware safe reinforcement learning for control of stochastic linear systems

Asian Journal of Control, EarlyView.
Abstract This paper presents a risk‐aware safe reinforcement learning (RL) control design for stochastic discrete‐time linear systems. Rather than using a safety certifier to myopically intervene with the RL controller, a risk‐informed safe controller is also learned besides the RL controller, and the RL and safe controllers are combined together ...
Babak Esmaeili, Nariman Niknejad, Hamidreza Modares   +2 more
wiley   +1 more source

LMI conditions for some dynamical behaviors of fractional-order quaternion-valued neural networks

Advances in Difference Equations, 2019
This paper addresses the issue of three dynamical behaviors including global Mittag-Leffler stability, robust stability and projection synchronization for fractional-order quaternion-valued neural networks (FQVNNs).
Dongyuan Lin, Xiaofeng Chen, Bing Li, Xujun Yang   +3 more
doaj   +1 more source

Global generalized synchronization in networks of different time-delay systems

, 2013
We show that global generalized synchronization (GS) exists in structurally different time-delay systems, even with different orders, with quite different fractal (Kaplan-Yorke) dimensions, which emerges via partial GS in symmetrically coupled regular ...
Kurths, J., Lakshmanan, M., Senthilkumar, D. V., Suresh, R.   +3 more
core   +1 more source

Categorical Lyapunov Theory II: Stability of Systems

CoRR
Lyapunov's theorem provides a foundational characterization of stable equilibrium points in dynamical systems. In this paper, we develop a framework for stability for F-coalgebras. We give two definitions for a categorical setting in which we can study the stability of a coalgebra for an endofunctor F.
Aaron D. Ames, Sébastien Mattenet, Joe Moeller   +2 more
openaire   +2 more sources