Results 101 to 110 of about 1,090,770 (243)

Asymptotic stochastic characterization of phase and amplitude noise in free-running oscillators [PDF]

, 2011
Starting from the definition of the stochastic differential equation for amplitude and phase fluctuations of an oscillator described by an ordinary differential equation, we study the associated Fokker–Planck equation by using tools from stochastic ...
Bonani, Fabrizio, FABRIZIO BONANI, Traversa, Fabio Lorenzo, FABIO L. TRAVERSA   +3 more
core   +1 more source

Cross‐scale Material‐Structure Synergy for 2D Metamaterials: Toward Customizable Intelligent Electromagnetic Manipulation in Multiphysics Fields

Advanced Science, EarlyView.
Recent advances in metasurface‐enabled low‐observable technologies are reviewed from the perspective of cross‐scale material–structure synergy. Electromagnetic, thermal, optical, and acoustic stealth are highlighted together with dynamic tuning, programmable coding, data‐driven inverse design, artificial intelligence, multispectral compatibility, and ...
Shuhao Wang, Xing Yang, Liping Liu, Yang Peng, Yangyang Wang, Hualiang Lv   +5 more
wiley   +1 more source

Active Oscillations of Elastic Membranes Arising from the Coupling with a Catalytic Reaction

Advanced Science, EarlyView.
Coupling an elastic membrane to a catalytic reaction produces active oscillations that self‐sustain for hours: the membrane cyclically inflates and deflates as the reaction spontaneously activates and deactivates, without external power. Energy release is directly embodied in the oscillation dynamics, opening elasto‐chemical strategies for the physical
Alberto Comoretto, Samuel D. Gollob, Erik Steur, Kaitlyn P. Becker, Ellen T. Roche, Johannes T.B. Overvelde   +5 more
wiley   +1 more source

On the performance of a nonlinear vibration isolator consisting of axially loaded curved beams [PDF]

, 2013
A desirable characteristic for nonlinear vibration isolators is a high static stiffness and a low dynamic stiffness. A curved beam is a possible candidate for this role provided that the amplitude of vibration about the static equilibrium position is ...
Brennan, MJ, Abolfathi, Ali, Waters, Tim P., Brennan, Michael J., Waters, TP, Abolfathi, A   +5 more
core   +1 more source

STATISTICAL LINEARIZATION METHOD OF DUFFING OSCILLATOR UNDER GAUSSIAN WHITE NOISE EXCITATION [PDF]

In this paper is presented a statistical linearization method of Duffing oscillator under Gaussian white noise excitation. Duffing oscillator’s dispersion response to various nonlinearities and spectral intensities is obtained by the statistical ...
Ovidiu Solomon
core  

Oscillator with Line of Equilibiria and Nonlinear Function Terms: Stability Analysis, Chaos, and Application for Secure Communications

Mathematics
We explore an oscillator with nonlinear functions and equilibrium lines that displays chaos. The equilibrium stability and complexity of the oscillator have been analysed and investigated.
Othman Abdullah Almatroud, Ali A. Shukur, Viet-Thanh Pham, Giuseppe Grassi   +3 more
doaj   +1 more source

Q‐LEAP: Millisecond Hyperdimensional Optimization for Full‐Spectrum Optical Metamaterials

Advanced Science, EarlyView.
Q‐LEAP integrates physics‐informed residual machine learning with factorization‐machine‐encoded quantum annealing to design full‐spectrum optical metamaterials. It explores a 2108 design space and, in a single 2.56 ms annealing step, reaches 85.83% of the theoretical FoM limit, enabling selective 5‐8 µm emission with 3–5 and 8–14 µm suppression and ∼40×
Zikang Guo, Yunwen Wu, Yuhui Guo, Shenghong Ju   +3 more
wiley   +1 more source

Excitation‐Selective Hydrochromic Upconversion in Zero‐Dimensional Metal Halides

Advanced Science, EarlyView.
Excitation wavelength dictates whether moisture speaks. In zero‐dimensional metal halides, the same humidity leaves the upconversion emission unchanged under 980 nm excitation yet triggers a distinct green‐to‐red shift under 1550 nm. This excitation‐selective hydrochromism, governed by the absorption at each wavelength, enables stimulus‐dependent ...
Joo Hyeong Han, Jeong Min Seo, Sung Woo Jang, Yong Min Park, San Ha Choi, Ji Hyeon Cha, Won Bin Im   +6 more
wiley   +1 more source

CW‐Pumped Amplified Spontaneous Emission From Thermally Evaporated CsPbBr3 Films

Advanced Science, EarlyView.
Thermally evaporated CsPbBr3 thin films sustain amplified spontaneous emission from short‐pulse toward quasi‐continuous‐wave excitation. Time‐resolved spectroscopy, controlled excitation, and substrate engineering reveal how excitation duration governs optical‐gain stability.
Yuliia Kominko, Willem Verheijen, Gabriele Rainò, Simon C. Boehme, Maksym V. Kovalenko, Sergii Yakunin   +5 more
wiley   +1 more source

EXACT SOLUTIONS TO CUBIC DUFFING EQUATION FOR A NONLINEAR ELECTRICAL CIRCUIT

Visión Electrónica, 2014
This work provides an exact solution to a cubic Duffing oscillator equation with initial conditions and bounded periodic solutions. This solution is expressed in terms of the Jacobi elliptic function (cn).
Álvaro H. Salas S., Jairo E. Castillo H
doaj