Results 31 to 40 of about 113,963 (160)

Exploring cloud technology to create a virtual learning system

open access: yesCTE Workshop Proceedings, 2013
At the moment, the use of cloud technology is increasingly used in various areas of human activity. Creating a virtual private cloud is no longer a big problem and is used in practice more and more often.
K. S. Andronova, I. V. Levykin
doaj   +1 more source

Scaled-Model Radar Cross-Section Measurement: The Influence of the Scattered Field under Gaussian Beam Illumination—A Theoretical Analysis

open access: yesSensors, 2023
At microwave frequencies, radar cross-section (RCS) measurements are usually performed by placing the target in the far-field region of the antenna. The wavefront of the radiating field from the antenna can be approximated as planar, ensuring that the ...
Yi Xuan Ang, Hoi-Shun Lui
doaj   +1 more source

On the problem of optimal control of rotation axis reorientation of a spacecraft

open access: yesВестник Самарского университета: Естественнонаучная серия
Various variants of the formulation of optimal control problem of the reorientation of the axis of dynamic symmetry of the spacecraft (spacecraft), which is the axis of rotation, are considered.
Yury N. Gorelov, Lubov V. Kurganskaya
doaj   +1 more source

LMI-Based Model Reduction by Moment Matching for Linear Time-Invariant Models [PDF]

open access: yes, 2021
This paper proposes an approach to model order reduction of stable linear time-invariant (LTI) models. The proposed approach extends time-domain moment matching by the minimization of the H∞ norm of the error dynamics characterizing the difference ...
M. F. Shakib   +18 more
core   +1 more source

Some practical suggestions for the scientific problem formulation and the objectives in the research project

open access: yesMedisur, 2017
One of the main difficulties for first-time researchers is writing the scientific problem and the objective of the research. The objective of this article is to provide an orientation on how to carry out the concrete moment of formulating the problem and,
Luis Alberto Corona Martínez   +2 more
doaj   +2 more sources

An Algorithm for Online Inertia Identification and Load Torque Observation via Adaptive Kalman Observer-Recursive Least Squares

open access: yesEnergies, 2018
In this paper, an on-line parameter identification algorithm to iteratively compute the numerical values of inertia and load torque is proposed. Since inertia and load torque are strongly coupled variables due to the degenerate-rank problem, it is hard ...
Ming Yang   +4 more
doaj   +1 more source

Quantum Science and the Search for Axion Dark Matter

open access: yesPRX Quantum, 2023
The dark-matter puzzle is one of the most important open problems in modern physics. The ultralight axion is a well-motivated dark-matter candidate, conceived to resolve the strong-CP problem of quantum chromodynamics.
Alexander O. Sushkov
doaj   +1 more source

On the Size of the Safety Area around the Launch Trajectory of a Rocket

open access: yesAerospace, 2023
The safety zone around the flight path of a rocket is determined by the fall of debris in the case of an accidental explosion or commanded termination. The trajectory of a tumbling body in a vertical plane is determined by specifying the velocity, flight
Luiz M. B. C. Campos, Manuel J. S. Silva
doaj   +1 more source

Asymptotic second moment of Dirichlet L-functions along a thin coset

open access: yesForum of Mathematics, Sigma
We prove an asymptotic formula for the second moment of central values of Dirichlet L-functions restricted to a coset. More specifically, consider a coset of the subgroup of characters modulo d inside the full group of characters modulo q. Suppose that
Bradford Garcia, Matthew P. Young
doaj   +1 more source

Digital Services as a Stage of Ecosystem Development in Modern Russian Politics

open access: yesВестник Волгоградского государственного университета. Серия 4. История, регионоведение, международные отношения, 2023
Introduction. The article deals with issues related to the comprehensive phenomenon of modernity, the Internet. Attention is paid to new phenomena of its development, such as the emergence of digital services and platforms as well as the ...
Alexander Sokolov   +2 more
doaj   +1 more source

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