Results 21 to 30 of about 773,209 (312)

Estimating Space-Dependent Coefficients for 1D Transport Using Gaussian Processes as State Estimator in the Frequency Domain [PDF]

, 2023
This letter presents a method to estimate the space-dependent transport coefficients (diffusion, convection, reaction, and source/sink) for a generic scalar transport model, e.g., heat or mass.
R.J. R. van Kampen, Zwart, Hans, van Berkel, Matthijs, van Kampen, R.J.R., H. Zwart, Zwart, H., van Kampen, Ricky J.R.; id_orcid, Berkel, Matthijs van, Zwart, Hans; id_orcid, van Berkel, M., M. van Berkel, van Kampen, Ricky J.R.   +11 more
core   +1 more source

Two Inverse Problems Solution by Feedback Tracking Control

Axioms, 2021
Two inverse ill-posed problems are considered. The first problem is an input restoration of a linear system. The second one is a restoration of time-dependent coefficients of a linear ordinary differential equation.
Vladimir Turetsky
doaj   +1 more source

Introducing the Nonlinear State Control Algorithm of the Air Bearing Laboratory Simulator Based on the Gain Coefficients Dependent on the State Variables [PDF]

فصلنامه علوم و فناوری فضایی, 2023
In this article, a new approach has been presented in the design of a satellite's status controller using reaction wheels. First, a non-linear controller whose gains depend on the state variables at any moment is proposed.
Alireza Ahangarani Farahani, Amirhossain Adami, Hamed Arefkhani   +2 more
doaj   +1 more source

An application of Phragmén–Lindelöf theorem to the existence of ground state solutions for the generalized Schrödinger equation with optimal control

Boundary Value Problems, 2020
In this paper, we develop optimal Phragmén–Lindelöf methods, based on the use of maximum modulus of optimal value of a parameter in a Schrödinger functional, by applying the Phragmén–Lindelöf theorem for a second-order boundary value problems with ...
Chaofeng Zhang, Rong Hu
doaj   +1 more source

Application of multiple regression analysis to study the relationship between eeg rhythms at persons with mental retardation

Journal of Education, Health and Sport, 2022
Using the calculation of coefficients of multiple linear regression of two-dimensional correlation, we studied the mutual influences (functional connectivity) between the amplitudes of EEG rhythms in people with mental retardation.
B. Lobasyuk, L. Bartsevich, A. Zamkovaya
doaj   +1 more source

Distributed control of nonlinear systems with unknown time-varying control coefficients: a novel Nussbaum function approach

, 2022
In this paper, distributed control of uncertain multi-agent systems (MAS) with completely unknown nonlinearities, unknown time-varying control coefficients and multiple unknown control directions is investigated.
Jiangshuai Huang, Huang, Jiangshuai, Xiaojie Su, Liu, Zongcheng, Wen, Changyun, Su, Xiaojie, Zongcheng Liu, Changyun Wen   +7 more
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Development of a theoretical model for upright postural control in lower limb prosthesis users

Scientific Reports, 2021
Methods used to assess quiet standing in unilateral prosthesis users often assume validity of an inverted pendulum model despite this being shown as invalid in some instances.
David F. Rusaw, Rasmus Alinder, Sigurd Edholm, Karin L. L. Hallstedt, Jessika Runesson, Cleveland T. Barnett   +5 more
doaj   +1 more source

Fault Detection in High Redundancy Actuation Using an Interacting Multiple-Model Approach [PDF]

, 2009
The High Redundancy Actuation (HRA) project investigates the use of a relatively high number of small actuation elements, assembled in series and parallel in order to form a single actuator which has intrinsic fault tolerance.
Thomas Steffen (1252947), Dixon, R., Tsunashima, H., H. Tsunashima (7209566), T. Steffen, Steffen, T., J. Davies, R. Dixon, Roger Goodall (1250520), Goodall, R. M., H. Tsunashima, Dixon, Roger, Jessica Davies (3927101), Roger Dixon (1259193), Dixon, R.; id_orcid, R.M. Goodall, Tsunashima, Hitoshi, Steffen, Thomas, Davies, J., Goodall, Roger M., Davies, Jessica   +20 more
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Approximate Optimal Control for a Parabolic System with Perturbations in the Coefficients on the Half-Axis

Axioms, 2022
In this paper, we use the averaging method to find an approximate solution in the optimal control problem of a parabolic system with non-linearity of the form f(t/ε,y) on an infinite time interval.
Olena A. Kapustian, Oleksiy V. Kapustyan, Anton Ryzhov, Valentyn Sobchuk   +3 more
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Identification Problem for Nonlinear Gao Beam

Mathematics, 2020
This paper deals with the identification of coefficients in the nonlinear beam model which was first introduced by D. Y. Gao in 1996. For the identification of coefficients, an optimal control approach is used.
Jana Radová, Jitka Machalová, Jana Burkotová   +2 more
doaj   +1 more source