Zobrazeno 1 - 10
of 76
pro vyhledávání: '"Fredy E. Hoyos"'
Publikováno v:
Mathematical Biosciences and Engineering, Vol 20, Iss 10, Pp 17747-17782 (2023)
Modeling soil moisture as a function of meteorological data is necessary for agricultural applications, including irrigation scheduling. In this study, empirical water balance models and empirical compartment models are assessed for estimating soil m
Externí odkaz:
https://doaj.org/article/167377c7514d417792122336b6823b42
Publikováno v:
Energies, Vol 17, Iss 11, p 2701 (2024)
Microgrids are designed to connect different types of AC and DC loads, which require robust power controllers to achieve an efficient power transfer. However, the effects of both AC and DC disturbances in the same type of controller make achieving st
Externí odkaz:
https://doaj.org/article/6e2435c649b34e83963882d4ced05397
Publikováno v:
Mathematical Biosciences and Engineering, Vol 20, Iss 2, Pp 3396-3424 (2023)
In this work, the global stability of a continuous bioreactor model is studied, with the concentrations of biomass and substrate as state variables, a general non-monotonic function of substrate concentration for the specific growth rate, and constan
Externí odkaz:
https://doaj.org/article/6933fb7abf5544da824ad3ef6fc41d02
Publikováno v:
Journal of Daylighting, Vol 7, Iss 1, Pp 73-83 (2020)
Compact Fluorescent Lamps (CFLs) and Light-emitting Diode (LED) lamps have received wide acceptance in lighting applications during the last few years. However, without a power factor correction (PFC), the lamps reach a lagging power factor below 0.6
Externí odkaz:
https://doaj.org/article/29f2eb06e05841909ca28a9d8fa498b6
Publikováno v:
Mathematical Biosciences and Engineering, Vol 17, Iss 3, Pp 2103-2137 (2020)
We analyze a generalized form of the Fujikawas growth model which involves an adaptation function that enhances the representation of the lag phase. This model is autonomous, and combines a power law term, a saturation term and an adaptation function
Externí odkaz:
https://doaj.org/article/feb9945e33744810bb69aa9bda97f300
Publikováno v:
Sensors, Vol 22, Iss 18, p 6988 (2022)
The properties of the convergence region of the estimation error of a robust observer for second-order systems are determined, and a new algorithm is proposed for setting the observer parameters, considering persistent but bounded disturbances in the
Externí odkaz:
https://doaj.org/article/bac632d829af4383895e337421c25451
Publikováno v:
Applied Sciences, Vol 12, Iss 19, p 9565 (2022)
In high load conditions, the boost converter presents some phenomena, such as chattering, chaos, subharmonics, and nT-periodic orbits, which require studying them with the aim of reducing the effects and improving the performance of these electronic
Externí odkaz:
https://doaj.org/article/e02ef91d9dbd47dc8a43c3db40d24f11
Publikováno v:
Mathematics, Vol 10, Iss 19, p 3559 (2022)
In this paper, a derivative for functions f:G→H, where G is any metric divisible group and H is a metric Abelian group with a group metric, is defined. Basic differentiation theorems are stated and demonstrated. In particular, we obtain the Chain R
Externí odkaz:
https://doaj.org/article/5aed1858744341fb8123f10b6d918ec7
Publikováno v:
Symmetry, Vol 14, Iss 6, p 1232 (2022)
In this work, a controller is developed for a continuous bioreactor with an unknown reaction rate term, subject to input saturation. The substrate concentration and the dilution rate are chosen as output and input, respectively. The controller formul
Externí odkaz:
https://doaj.org/article/2944fa1f9b7a4c8f85e95988a53d693a
Publikováno v:
Mathematics, Vol 10, Iss 11, p 1855 (2022)
In this work, a new robust controller is designed for a second-order plant model, considering asymmetric output constraints. The tracking error convergence and output constraint are achieved by using a control law whose output feedback term is user-d
Externí odkaz:
https://doaj.org/article/2cc8738db08a4e7792de7da8b15a7cf0