Results 1 to 10 of about 79,746 (274)

Orbit-resolved photometry and echelle spectroscopy of the cataclysmic variable ST LMi during a 2007 high state [PDF]

open access: bronze, 2008
We present high-resolution echelle spectra and contemporaneous photometry of the polar ST LMi during a high state in 2007 March. Emission lines at Hα, He I λ5876, and He I λ7065 show similar line profiles over orbital phase and have narrow and broad ...
Campbell, T.   +4 more
core   +4 more sources

Evaluation of Delays-based Stability of LFC Systems in the Presence of Electric ‎Vehicles Aggregator [PDF]

open access: yesJournal of Operation and Automation in Power Engineering, 2022
In the integrated electrical systems, frequency control service considering the electric vehicle (EV) aggregators could lead to time-varying delay in load frequency control (LFC) schemes.
F. Babaei, A. Safari, J. Salehi
doaj   +1 more source

Robust Model Predictive Control Design

open access: yesСовременные информационные технологии и IT-образование, 2021
Recently, many control designers have worked on design methods that meet several design specifications called multi-objective control design. However, the main challenge for the Model Predictive Control design is the high computational load preventing ...
Abdelillah Otmane Cherif   +1 more
doaj   +1 more source

Exponential synchronization control of delayed memristive neural network based on canonical Bessel-Legendre inequality

open access: yesAIMS Mathematics, 2022
In this paper, we study the exponential synchronization problem of a class of delayed memristive neural networks(MNNs). Firstly, a intermittent control scheme is designed to solve the parameter mismatch problem of MNNs.
Xingxing Song   +4 more
doaj   +1 more source

An improved stability criterion for discrete-time time-delayed Lur'e system with sector-bounded nonlinearities

open access: yesAutomatika, 2022
The absolute stability problem of discrete-time time-delayed Lur'e systems with sector bounded nonlinearities is investigated in this paper. Firstly, a modified Lyapunov-Krasovskii functional (LKF) is designed with augmenting additional double summation ...
Lijuan Zhu, Chengyun Zhu
doaj   +1 more source

Further results on stability analysis of Takagi–Sugeno fuzzy time-delay systems via improved Lyapunov–Krasovskii functional

open access: yesAIMS Mathematics, 2022
The problem of delay-range-dependent (DRD) stability analysis for continuous time Takagi–Sugeno (T–S) fuzzy time-delay systems (TDSs) is addressed in this paper.
Rupak Datta   +3 more
doaj   +1 more source

A new robust LMI-based model predictive control for continuous-time uncertain nonlinear systems

open access: yesAutomatika, 2020
This paper presents a new robust predictive controller for a special class of continuous-time non-linear systems with uncertainty. These systems have bounded disturbances with unknown upper bound as well as constraints on input states.
Luo Huofa, Hashem Imani Marrani
doaj   +1 more source

Velocity Control of Nonlinear Unmanned Rotorcraft using Polytopic Modelling and State Feedback Control [PDF]

open access: yesInternational Journal of Advanced Design and Manufacturing Technology, 2020
Performance and improvement of flight efficiency at various velocities for flight systems, in particular, rotorcrafts, with specific complexities in motion and its nonlinear equations are always of particular interest to researchers in the aerial and ...
Reza Tarighi   +2 more
doaj   +1 more source

Ressources en eau, sociétés et territoires méditerranéens. L’interdisciplinarité pour répondre aux défis du changement climatique

open access: yesNatures Sciences Sociétés, 2019
La COP 22 (Marrakech, 2016) a fourni aux scientifiques l’occasion de s’interroger sur les conditions d’un dialogue interdisciplinaire autour du changement climatique, notamment à travers le séminaire « Ressources en eau, sociétés et territoires ...
Romagny Bruno   +4 more
doaj   +1 more source

Effect of bacterial lipase on anaerobic co-digestion of slaughterhouse wastewater and grease in batch condition and continuous fixed-bed reactor

open access: yesLipids in Health and Disease, 2017
Background This study aimed to investigate the effects of bacterial lipase on biogas production of anaerobic co-digestion of slaughterhouse wastewater (SHWW) and hydrolyzed grease (HG).
Maha Affes   +4 more
doaj   +1 more source

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