Results 61 to 70 of about 2,092,411 (198)

Robust Diffusion Affine Projection Algorithm With Variable Step-Size Over Distributed Networks

IEEE Access, 2019
The estimation performance of the standard diffusion affine projection algorithm may be degraded when the distributed network nodes are disturbed by impulsive noise. To overcome the limitation, a diffusion affine projection M-estimate (DAPM) algorithm is
Pucha Song, Haiquan Zhao, Xiangping Zeng
doaj   +1 more source

Advancing Machine Learning Optimization of Chiral Photonic Metasurface: Comparative Study of Neural Network and Genetic Algorithm Approaches

Advanced Physics Research, Volume 5, Issue 6, June 2026.
Two methods for the optimization of chiral reflection by a metamaterial made of either GaP/Air or PMMA/Air interfaces are compared, showing approaches towards fast design exploration and high‐performance results: a neural‐network pipeline and a genetic algorithm. The structures considered are characterized by a periodic, chiral texturation with a shape
Davide Filippozzi, Alexandre Mayer, Nicolas Roy, Wei Fang, Arash Rahimi‐Iman   +4 more
wiley   +1 more source

Distributed Optimization of Finite Condition Number for Laplacian Matrix in Multi‐Agent Systems

International Journal of Robust and Nonlinear Control, Volume 36, Issue 9, Page 5030-5043, June 2026.
ABSTRACT This paper addresses the distributed optimization of the finite condition number of the Laplacian matrix in multi‐agent systems. The finite condition number, defined as the ratio of the largest to the second smallest eigenvalue of the Laplacian matrix, plays an important role in determining the convergence rate and performance of consensus ...
Yicheng Xu, Faryar Jabbari
wiley   +1 more source

AAA+ protein unfoldases—the Moirai of the proteome

FEBS Letters, Volume 600, Issue 10, Page 1444-1474, May 2026.
AAA+ unfoldases are essential molecular motors that power protein degradation and disaggregation. This review integrates recent cryo‐electron microscopy (cryo‐EM) structures and single‐molecule biophysical data to reconcile competing models of substrate translocation.
Stavros Azinas, Marta Carroni
wiley   +1 more source

Solving hyperchaotic initial value problems using second derivative extended trapezoidal rule of the second kind blended with generalized backward differentiation formulae with variable step size

Recent Advances in Natural Sciences
This paper aims to evaluate the accuracy and performance of the second derivative block extended trapezoidal rule of the second kind, blended with generalized backward differentiation formulae using variable step sizes, in solving hyperchaotic initial ...
E. J. Onoja, U. W. Sirisena
doaj   +1 more source

Solubilities of CL‐20 and MDNT in Organic Solvents for Technical Cocrystallization

Propellants, Explosives, Pyrotechnics, Volume 51, Issue 5, Page 761-768, May 2026.
ABSTRACT The 1:1 molar cocrystal of 2,4,6,8,10,12‐hexanitro‐2,4,6,8,10,12‐hexaazaisowurtzitane (CL‐20) and 1‐methyl‐3,5‐dinitro‐1,2,4‐triazole (MDNT) is reported to show a detonation velocity 100 m/s faster than β‐HMX. To establish a scalable synthesis method, the solubility of ε‐CL‐20 and MDNT was investigated.
Eduard Wegert, Peter Schultz, Thomas M. Klapötke   +2 more
wiley   +1 more source

Test‐Negative Designs With Multiple Testing Sources

Statistics in Medicine, Volume 45, Issue 10-12, May 2026.
ABSTRACT Test‐negative designs, a form of case‐cohort studies, have been commonly used to assess infectious disease interventions. Early examples of the design included the evaluation of seasonal influenza vaccines in the field. Recently, they have also been widely used to evaluate the efficacy of COVID‐19 vaccines in preventing symptomatic disease for
Mengxin Yu, Nicholas P. Jewell
wiley   +1 more source

Delayless Block Individual-Weighting-Factors Sign Subband Adaptive Filters With an Improved Band-Dependent Variable Step-Size

IEEE Access, 2020
Delayless individual-weighting-factors sign subband adaptive filter (IWF-SSAF) algorithms with a band-dependent variable step-size (BDVSS) were recently introduced to achieve a robust convergence performance against the impulsive interference and to ...
Jung-Hee Kim, Jeong-Hwan Choi, Sang Won Nam, Joon-Hyuk Chang   +3 more
doaj   +1 more source

On Nonlinear Oscillations: Basins of Attraction, Harmonic Balance Solution Artifacts and Urabe's Existence Criterion for the Duffing Oscillator

ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, Volume 106, Issue 4, April 2026.
ABSTRACT The Duffing oscillator is often considered as “the” prototype of a nonlinear oscillator as it exhibits many characteristic phenomena of nonlinear dynamics. One of these phenomena is the occurrence of multiple periodic solutions as considered here for the case of the harmonically excited slightly damped Duffing oscillator.
Hannes Dänschel, Lukas Lentz, Nils Gräbner, Utz von Wagner   +3 more
wiley   +1 more source

Variable stepsize diagonally implicit multistage integration methods for ordinary differential equations

, 1995
We provide an alternative to the Nordsieck technique of changing the stepsize of integration. Order conditions are derived using a recent approach by Albrecht and examples of methods are given which are appropriate for stiff or nonstiff systems in ...
ZENNARO, MARINO, VERMIGLIO R., ZENNARO M., JACKIEWICZ Z., VERMIGLIO, Rossana   +4 more
core   +1 more source