Results 21 to 30 of about 2,534 (231)

Hyers–Ulam stability and hyperstability of a Jensen-type functional equation on 2-Banach spaces

open access: yesJournal of Inequalities and Applications, 2022
The main aim of this paper is to establish the Hyers–Ulam stability and hyperstability of a Jensen-type quadratic mapping in 2-Banach spaces. That is, we prove the various types of Hyers–Ulam stability and hyperstability of the Jensen-type quadratic ...
Arumugam Ponmana Selvan, Abbas Najati
doaj   +1 more source

Asymptotic stability of the Cauchy and Jensen functional equations [PDF]

open access: yes, 2016
The aim of this note is to investigate the asymptotic stability behaviour of the Cauchy and Jensen functional equations. Our main results show that if these equations hold for large arguments with small error, then they are also valid everywhere with a ...
A. Bahyrycz   +19 more
core   +2 more sources

A hyperstable collagen mimic

open access: yesChemistry & Biology, 1999
Collagen is the most abundant protein in animals. Each polypeptide chain of collagen is composed of repeats of the sequence: Gly-X-Y, where X and Y are often L-proline (Pro) and 4(R)-hydroxy-L-proline (Hyp) residues, respectively. These chains are wound into tight triple helices of great stability. The hydroxyl group of Hyp residues contributes much to
Holmgren, Steven K   +3 more
openaire   +2 more sources

Asymptotic Hyperstability and Input–Output Energy Positivity of a Single-Input Single-Output System Which Incorporates a Memoryless Non-Linear Device in the Feed-Forward Loop

open access: yesMathematics, 2022
This paper visualizes the role of hyperstable controllers in the closed-loop asymptotic stability of a single-input single-output system subject to any nonlinear and eventually time-varying controller within the hyperstable class.
Manuel De la Sen
doaj   +1 more source

Analysis of success of achieving fishing mortality levels for the Northwest Mediterranean Multi-annual plan. [PDF]

open access: yes, 2017
The evaluation of multi-annual plans to manage demersal fisheries performed by STECF (2016) is revisited to calculate an additional indicator of fishing mortality that better captures the effect of using ranges.
GAMITO JARDIM JOSÉ ERNESTO   +1 more
core   +1 more source

An implementation of rotor speed observer for sensorless induction motor drive in case of machine parameter uncertainty [PDF]

open access: yes, 2018
The paper describes observers using model reference adaptive system for sensorless induction motor drive with the pulse width modulator and the direct torque control under the circumstances of incorrect information of induction motor parameters.
Brandštetter, Pavel   +3 more
core   +3 more sources

Stability of a generalization of the Fréchet functional equation

open access: yesAnnales Universitatis Paedagogicae Cracoviensis: Studia Mathematica, 2015
We prove some stability and hyperstability results for a generalization of the well known Fréchet functional equation, stemming from one of the characterizations of the inner product spaces. As the main tool we use a fixed point theorem for the function
Renata Malejki
doaj   +1 more source

Adaptive control of nonlinear dynamical systems using a model reference approach [PDF]

open access: yes, 2003
In this paper we consider using a model reference adaptive control approach to control nonlinear systems. We consider the controller design and stability analysis associated with these type of adaptive systems.
Wagg, D.J.
core   +1 more source

Adaptive Controller Design for Faulty UAVs via Quantum Information Technology

open access: yesInternational Journal of Advanced Robotic Systems, 2012
In this paper, an adaptive controller is designed for a UAV flight control system against faults and parametric uncertainties based on quantum information technology and the Popov hyperstability theory.
Fuyang Chen, Rui Hou, Gang Tao
doaj   +1 more source

On Some Relations between Accretive, Positive, and Pseudocontractive Operators and Passivity Results in Hilbert Spaces and Nonlinear Dynamic Systems [PDF]

open access: yes, 2017
This paper investigates some parallel relations between the operators (I-G) and G in Hilbert spaces in such a way that the pseudocontractivity, asymptotic pseudocontractivity, and asymptotic pseudocontractivity in the intermediate sense of one of them ...
De la Sen Parte, Manuel
core   +3 more sources

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