Results 61 to 70 of about 33,885 (237)
Management and incipient domestication of Chamaedorea tepejilote in agroforestry systems in Mexico
PLANTS, PEOPLE, PLANET, EarlyView.Native wild plants are key elements in addressing global biodiversity loss and supporting sustainable food systems. We investigated how rural communities in Mexico manage Chamaedorea tepejilote, a wild palm with edible male inflorescences, by combining ethnobotanical, genetic, morphological and ecological approaches.
Viviana Andrade +7 more
wiley +1 more source
Investigaciones Geográficas, 2012 Martínez Limón, E. (ed.: 2011) Gran Guía Turística. UNAM: Ciudad Universitaria y antiguo barrio del Centro Histórico, El País-Aguilar/UNAM, 223 pp., ISBN 978-607-11-0710 ...
Valeria Sánchez MIchel
doaj +1 more source
Optimal Homogeneous ℒp$$ {\boldsymbol{\mathcal{L}}}_{\boldsymbol{p}} $$‐Gain Controller
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT Nonlinear ℋ∞$$ {\mathscr{H}}_{\infty } $$‐controllers are designed for arbitrarily weighted, continuous homogeneous systems with a focus on systems affine in the control input. Based on the homogeneous ℒp$$ {\mathcal{L}}_p $$‐norm, the input–output behavior is quantified in terms of the homogeneous ℒp$$ {\mathcal{L}}_p $$‐gain as a ...
Daipeng Zhang +3 more
wiley +1 more source
Revista Española de Documentación Científica, 2006 El presente trabajo tiene por objetivo principal analizar los patrones de la colaboración en la producción científica de la Universidad Nacional Autónoma de México (UNAM) en revistas de corriente principal en términos de la política científica ...
Jane M. Russell +2 more
doaj +1 more source
Optimal Gain Selection for the Arbitrary‐Order Homogeneous Differentiator
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT Differentiation of noisy signals is a relevant and challenging task. Widespread approaches are the linear high‐gain observer acting as a differentiator and Levant's robust exact differentiator with a discontinuous right‐hand side. We consider the family of arbitrary‐order homogeneous differentiators, which includes these special cases.
Benjamin Calmbach +2 more
wiley +1 more source
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT This paper establishes an implementation‐aware framework for Barrier Function Adaptation (BFA) and shows that discrete‐time realizations fundamentally alter the logic of final‐set adjustment. In particular, sufficient conditions are derived to preserve the key benefits of BFA (predefined performance, gain adaptation with uncertain perturbation
Luis Ovalle +3 more
wiley +1 more source
Exact Robust Filtering and Differentiation Based on Sliding Modes and Homogeneity
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT This article addresses the problem of online estimation of the derivatives of a signal corrupted by measurement noise. The measured signal is modeled as the sum of a smooth nominal component and a uniformly bounded noise term. A key objective is to attenuate the effect of high‐frequency noise.
Jaime A. Moreno, Arie Levant
wiley +1 more source
High‐Order Sliding‐Mode control for MIMO Systems
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT This paper extends Lyapunov‐based homogeneous high‐order sliding‐mode control to a class of uncertain non‐square multi‐input multi‐output (MIMO) nonlinear systems with a well‐defined vector relative degree. The considered systems admit a normal‐form representation with an uncertain but full‐row‐rank input‐gain matrix.
Jaime A. Moreno, Angel Mercado‐Uribe
wiley +1 more source
Ultrafast Laser‐Driven Crystallization of LTA Zeolite
Small Methods, EarlyView.The ultrafast laser synthesis technique, using femtosecond laser pulses, enhances zeolite synthesis by providing high‐precision control over energy delivery and reaction kinetics. This technique accelerates the synthesis of high‐quality zeolite crystals with enhanced functionality.
Meryem Merve Doğan +2 more
wiley +1 more source