Article
Automation & Control Systems
Sangwon Lee, Jin-Su Hong, Jaehoon Shim, Minha Kim, Jung-Ik Ha
Summary: This study proposes an iterative control method that achieves both a wide magnetic-feasible workspace and low conduction loss.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Kun-Long Chen
Summary: This study proposes an intelligent and contactless current measurement method using magnetic field sensors and conductor geometry specifications of overhead lines. The experimental results show that the proposed method achieves a maximum measurement error of less than 10%.
IEEE TRANSACTIONS ON SMART GRID
(2022)
Article
Chemistry, Physical
Wensen Wei, Lin Zu, Yuyan Han, Yimin Xiong, Zhe Qu, Yangfan Hu, Biao Wang, Haifeng Du
Summary: The critical behavior of antiskyrmion material Mn2Rh0.95Ir0.05Sn was investigated using bulk DC magnetization method. The obtained critical exponents were consistent and verified by Widom scaling relation, indicating a near Landau mean-field behavior in Mn2Rh0.95Ir0.05Sn. The reduced magnetization versus reduced magnetic field curves collapsed into two bunches around the Curie temperature T-C, confirming the reliability of the critical exponents.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Multidisciplinary
Xinxin Kong, Fei Yu, Wei Yao, Cong Xu, Jin Zhang, Shuo Cai, Chunhua Wang
Summary: This paper proposes a paradigm for constructing conservative chaotic systems and presents an example with complex dynamic behaviors. To address the slow encryption speed of high-dimensional continuous chaotic systems, a new algorithm is proposed. Through sufficient testing, it is proven that the algorithm achieves excellent results in practical applications.
APPLIED MATHEMATICAL MODELLING
(2024)
Article
Astronomy & Astrophysics
A. B. Lotekar, I. Y. Vasko, T. Phan, S. D. Bale, T. A. Bowen, J. Halekas, A. Artemyev, Yu Khotyaintsev, F. S. Mozer
Summary: This study presents statistical analysis of proton kinetic-scale current sheets observed by the Parker Solar Probe. The analysis reveals the range and typical values for the thickness and current density of these current sheets, as well as their asymmetry and relationship with scale and magnetic shear angles. The findings suggest that these proton kinetic-scale current sheets are produced by turbulence cascade and are not suppressed by the diamagnetic mechanism.
ASTROPHYSICAL JOURNAL
(2022)
Article
Physics, Applied
Lijun Wang, Zhefeng Zhang, Jieli Chen, Ze Yang, Jing Jiang, Hongda Wang, Shenli Jia
Summary: In the vacuum DC circuit breaker based on the artificial current zero, the change of arc luminosity delays the change of current value significantly in the fast current-zero stage. This phenomenon has impacts on the breaking capacity of the DC vacuum circuit breaker. The study establishes a 3D transient magneto-hydro-dynamic model to investigate the dynamic characteristics of arc plasma under this condition. The simulation results show that the fast current-zero stage is too short for the plasma to diffuse, and the changes of physical characteristics of the arc plasma lag the change of current value.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Mathematics, Applied
Matheus S. Palmero, Ibere L. Caldas, Igor M. Sokolov
Summary: In this work, the authors demonstrate the usefulness of finite-time recurrence analysis in studying the dynamical behavior of chaotic trajectories in two-dimensional non-linear Hamiltonian systems. They find that orbits with high recurrence rates experience stickiness and are trapped in specific regions of the phase space.
Article
Mechanics
Quang-Thai Nguyen, Van-Tu Nguyen, Thanh-Hoang Phan, Trong-Nguyen Duy, Seong-Ho Park, Warn-Gyu Park
Summary: This paper numerically studies the dynamics of initially spherical bubble collapse near an oscillating rigid wall. Numerical simulations were conducted using a compressible two-phase flow model and the volume of fluid (VOF) interphase-sharpening technique on a general curvilinear moving grid. The effects of the oscillating wall on bubble collapse were investigated, and the interface deformation, jetting behavior, bubble collapse time, and bubble migration were determined.
Article
Mathematics, Applied
Christophe Letellier, Sylvain Mangiarotti, Ludovico Minati, Mattia Frasca, Jean-Pierre Barbot
Summary: Controlling chaos is important in many applications, and various techniques have been proposed for this purpose. In this study, we propose a strategy that involves optimal placement of sensors and actuators to achieve global observability and controllability. This strategy allows for the derivation of a system model using a global modeling technique, which is then used for designing a control law through feedback linearization. The effectiveness of this strategy is demonstrated through the application to three case studies, including two piecewise linear circuits, and the sensitivity to the system dynamics' time constant is also discussed.
Article
Astronomy & Astrophysics
P. Colangelo, F. Giannuzzi, N. Losacco
Summary: This study examines the influence of a magnetic field on the chaotic dynamics of a string with endpoints on the boundary of an asymptotically AdS(5) space with a black hole. Poincare sections and Lyapunov exponents are used to analyze the string perturbed from a static configuration in two different orientations, with endpoints on the boundary either orthogonal or parallel to the magnetic field. The findings indicate that the magnetic field stabilizes the string dynamics, with the largest Lyapunov exponent remaining below the Maldacena-Shenker-Stanford bound.
Article
Computer Science, Information Systems
Kanan Babanli, Rana Ortac Kabaoglu
Summary: This paper investigates the use of a hybrid approach combining fuzzy logic and chaos theory to model the uncertainty and complexity of a secure communication system. The approach involves constructing a fuzzy rule base to describe the behavior of the chaotic system, resulting in lower computational complexity and increased security.
INFORMATION SCIENCES
(2022)
Article
Engineering, Electrical & Electronic
Zhi Gong, Shiyou Yang
Summary: This paper introduces the Euler-Lagrange method for the rigorous modeling of low-frequency metamaterial (MTM) slabs in near field systems. The mechanisms of the extraordinary performance-enhancing capabilities of MTM slabs in near field systems are analyzed through numerical studies. The proposed method is verified through experimental studies of a prototype MTM-coil system. This work focuses on low-frequency MTM slabs and enables rigorous, flexible, and feasible analysis of MTM-based near field systems in electrical engineering.
INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS
(2023)
Article
Mathematics, Applied
Iacyel G. Silva, Wojciech Korneta, Stavros G. Stavrinides, Rodrigo Picos, Leon O. Chua
Summary: This paper presents experimental observation of stochastic resonance in a Chua circuit, showing the possibility of stochastic resonance for weak subthreshold magnetic field signals in chaotic systems, with a multi-peaked structure in residence times probability distribution under specific noise intensity, indicating synchronization between forcing and response in different regions of phase space.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2021)
Article
Materials Science, Multidisciplinary
D. S. Smirnov, A. Shumilin
Summary: In organic semiconductors, nuclear spin fluctuations lead to electric current noise, manifesting as pronounced magnetoresistance, with the current noise spectrum reflecting the role of nuclei in magnetoresistance through high-frequency peaks related to nuclear spin precession and low-frequency peaks related to nuclear spin relaxation, dependent on external magnetic and radio frequency fields.
Article
Mathematics, Applied
Olga I. Moskalenko, Alexey A. Koronovskii, Anton O. Selskii, Evgeniy V. Evstifeev
Summary: Multistability has been observed in unidirectionally coupled chaotic systems in the intermittent generalized synchronization regime. A method for revealing the existence of multistable states in interacting systems has been proposed, and its efficiency has been demonstrated using examples of logistic maps and Rossler systems in the intermittent generalized synchronization regime. Quantitative characteristics of multistability have been introduced into consideration.