Results 31 to 40 of about 75,049 (251)

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

open access: yes, 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   +2 more sources

Cycling-Based Synthesis of Robust Output Estimators for Uncertain LPTV Systems

open access: yesSICE Journal of Control, Measurement, and System Integration, 2019
This paper studies a method of designing robust output estimators for discrete-time linear periodically time-varying (LPTV) systems with uncertainties. The key idea is to use not the well-known lifting technique but that called cycling for dealing with ...
Yohei Hosoe   +2 more
doaj   +1 more source

Opportunistic Localization Scheme Based on Linear Matrix Inequality [PDF]

open access: yes, 2009
Enabling self-localization of mobile nodes is an important problem that has been widely studied in the literature. The general conclusions is that an accurate localization requires either sophisticated hardware (GPS, UWB, ultrasounds transceiver) or a ...
Kang, GuoDong   +3 more
core   +8 more sources

PFC design method for SAC based on the stability theorem of the descriptor system and frequency response fitting

open access: yesMechanical Engineering Journal, 2015
Simple adaptive control (SAC) is a control method that maintains control performance despite perturbations of a plant. However, there is a problem in that the vibratory output occurs in the transient response when SAC is applied to a vibration system ...
Masaya TANEMURA, Yuichi CHIDA
doaj   +1 more source

Sensor fault detection and isolation for a class of uncertain nonlinear system using sliding mode observers

open access: yesAutomatika, 2020
Quick and timely fault detection is of great importance in control systems reliability. Undetected faulty sensors could result in irreparable damages. Although fault detection and isolation (FDI) methods in control systems have received much attention in
Farideh Allahverdi   +2 more
doaj   +1 more source

Minimizing surface adhesion of Sylgard 184 for medical applications

open access: yesApplied Surface Science Advances
Silicones such Sylgard 184 are widely employed in biological applications due to their versatile properties. However, their inherently adhesive surfaces can restrict their application, especially in direct contact with damaged biological tissues ...
Axel Bachoux   +5 more
doaj   +1 more source

Robust preview tracking control for a class of uncertain discrete-time systems

open access: yesCogent Engineering, 2016
The robust preview control problem of uncertain discrete-time systems satisfying matching conditions is considered. First, for the nominal system, we use the difference between a system state and its steady-state value, instead of the usual difference ...
Fucheng Liao, Li Li
doaj   +1 more source

Impact of organic fertilisation on lettuce biomass production according to the cultivation duration in tropical soils

open access: yesActa Agriculturae Scandinavica. Section B, Soil and Plant Science, 2020
The productivity levels of two arenosol (Ar40) and fluvisol (FL40) fields that had been cultivated for over 40 years were compared to that of fields with the same soils located nearby but never previously cultivated, i.e.
Falilou Diallo   +3 more
doaj   +1 more source

Levels of Medical Intervention and End-of-Life Practices in Long-Term Care Centres

open access: yesCanadian Geriatrics Journal, 2022
Background Levels of medical intervention (LMI) are legal documents in which physicians record patient preferences, or those of their designated substitute decision-makers, concerning end-of-life care.
Jérôme Leclerc-Loiselle   +3 more
doaj   +1 more source

The system parameters of the polars MR Ser and ST LMi

open access: yes, 1996
We obtain the NaI 8183,8195 absorption line radial velocity curves for the polars ST LMi and MR Ser, from which we find the semi-amplitudes to be K_abs=329=+/-6 kms-1 and K_abs=289+/-9 kms-1 respectively. We find that for both systems the effects on the \
Shahbaz, T., Wood, Janet H.
core   +1 more source

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