Results 101 to 110 of about 5,721 (292)

Bifurcation, chaotic and hysteresis phenomena of broadband tristable energy harvesters

open access: yesMATEC Web of Conferences, 2018
We analyze energy harvesting using a mechanical resonator with three potential wells. Nonlinear effects are leading to frequency broadband voltage response via bifurcations, multiple solutions and dynamical hysteresis. We show the characteristic features
Zhou Shengxi, Cao Junyi, Litak Grzegorz
doaj   +1 more source

Is quinoa‐farming sustainable in marginal environments? Social, economical and environmental aspects

open access: yesJournal of the Science of Food and Agriculture, EarlyView.
Abstract Quinoa (Chenopodium quinoa Willd.) is an Andean grain crop introduced as a novel crop to many parts of the world in recent years. Recognized for nutritious seeds and high abiotic stress tolerance, it has been promoted as an element of climate‐resilient agriculture, particularly in marginal environments.
Anna Tabea Mengen   +5 more
wiley   +1 more source

Comprehensive analysis of the mechanism of sensitivity to initial conditions and fractal safe basins for wind turbine blade dynamics

open access: yesNext Energy
The aim of this work is to enhance the understanding of the nonlinear dynamics of wind turbine blade oscillators. A novel in-plane and out-of-plane dynamic model of wind turbine blade oscillators (featuring Mathieu-Duffing oscillators) is proposed to ...
Bo Qin, Ying Zhang
doaj   +1 more source

Geometric properties of isostables and basins of attraction of monotone systems [PDF]

open access: yes, 2017
In this paper, we study geometric properties of basins of attraction of monotone systems. Our results are based on a combination of monotone systems theory and spectral operator theory.
Sootla, Aivar   +3 more
core   +1 more source

Mathematical Analysis and Simulations of a Cancer Model With Interleukins and Delayed Immunotherapy

open access: yesMathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT A new system of delayed differential equations for tumor‐immune system interactions is proposed and studied. The system describes the interactions between tumor cells and the immune system at the most aggressive phase of cancer, where tumor cells have developed mechanisms from earlier stages to evade immune responses.
Laid Boudjellal   +2 more
wiley   +1 more source

Basins of Attraction for Third-Order Sigmoid Beverton Holt Difference Equation

open access: yesMathematics
The third-order difference equation yn+1=a1yn21+yn2+a2yn−121+yn−12+a3yn−221+yn−22, as a potential discrete time model of population dynamics with three generation involved, is studied.
Mustafa R. S. Kulenović, Ryan Sullivan
doaj   +1 more source

Some Iterative Methods Free from Derivatives and Their Basins of Attraction for Nonlinear Equations

open access: yesDiscrete Dynamics in Nature and Society, 2013
First, we make the Jain's derivative-free method optimal and subsequently increase its efficiency index from 1.442 to 1.587. Then, a novel three-step computational family of iterative schemes for solving single variable nonlinear equations is given.
Farahnaz Soleimani   +2 more
doaj   +1 more source

The relationship between the size of the basins of attraction and the two cost parameters.

open access: yes, 2015
Blue x’s represent the size of the basin of attraction of the hybrid equilibrium, black crosses represent the size of the basin of attraction of the handicap-signaling equilibrium.
Kevin J. S. Zollman (792857)   +1 more
core   +1 more source

Update on Ouratea cidiana Sastre (Ochnaceae), a microendemic species from the Amazon: enlightening the identity and conservation status

open access: yesNordic Journal of Botany, EarlyView.
Ouratea cidiana (Ochnaceae) is a microendemic shrub species from the Brazilian Amazonia, occurring along the banks of the Trombetas River and restricted to the Cachoeira Porteira region, in western Pará State. Since the original collection nearly forty years ago, no additional records have been made, which is concerning given the continuous decline in ...
Clebiana de Sá Nunes   +4 more
wiley   +1 more source

Smoothly Intertwined Basins of Attraction in a Prey-Predator Model

open access: yes, 1995
No fractals, no chaos, yet hard to predict. Using an easy version of the straddle-orbit procedure introduced by Grebogi and co-workers, we investigate the basins of attraction of a system of ODE in the plane of interest for the biological control of ...
TEDESCHINI LALLI, Laura
core   +1 more source

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