Results 51 to 60 of about 205,865 (354)

MULTIFUNCTIONAL ANTENNA DEVICE FOR PROTECTION OF RADIO COMMUNICATION CHANNELS OF UNITS OF LAW ENFORCEMENT FORCES

open access: yesСучасні інформаційні системи, 2020
Safe conduct of mass events requires from law enforcement forces to protect the units’ radio communication channels, detection and suppression of counterparty control radio channel.
Valentyn Kozlov   +4 more
doaj   +1 more source

Data‐driven forecasting of ship motions in waves using machine learning and dynamic mode decomposition

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
Summary Data‐driven forecasting of ship motions in waves is investigated through feedforward and recurrent neural networks as well as dynamic mode decomposition. The goal is to predict future ship motion variables based on past data collected on the field, using equation‐free approaches.
Matteo Diez   +2 more
wiley   +1 more source

Impact of Power Allocation and Antenna Directivity in the Capacity of a Multiuser Cognitive Ad Hoc Network [PDF]

open access: yes, 2012
This paper studies the benefits that power control and antenna directivity can bring to the capacity of a multiuser cognitive radio network. The main objective is to optimize the secondary network sum rate under the capacity constraint of the primary ...
Alfonso, V.   +3 more
core   +1 more source

LUNASKA simultaneous neutrino searches with multiple telescopes

open access: yes, 2011
The most sensitive method for detecting neutrinos at the very highest energies is the lunar Cherenkov technique, which employs the Moon as a target volume, using conventional radio telescopes to monitor it for nanosecond-scale pulses of Cherenkov ...
Aartsen, M.   +9 more
core   +1 more source

Receiving antenna electrodynamic model in terms of waveguide representation of HF field

open access: yesSolar-Terrestrial Physics, 2018
The receiving antenna is an important part of a radio channel that requires electrodynamic approach in mathematical simulation of its characteristics. Since the invention of radio, and due to further theoretical studies of radio signal transmission, the ...
Khakhinov V.V.
doaj   +1 more source

Antennas and Receivers in Radio Interferometry

open access: yes, 2016
The primary antenna elements and receivers are two of the most important components in a synthesis telescope. Together they are responsible for locking onto an astronomical source in both direction and frequency, capturing its radiation, and converting it into signals suitable for digitization and correlation. The properties and performance of antennas
Hunter, Todd R., Napier, Peter J.
openaire   +2 more sources

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

open access: yesInternational Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam   +2 more
wiley   +1 more source

Measurements of antenna polar diagrams and efficiencies using a phase-switched interferometer [PDF]

open access: yes, 1986
It is desirable to know antenna polar patterns and efficiencies accurately. In the past, calibration measurements have been made using balloons and aircraft and more recently satellites. These techniques are usually very expensive. It is shown that under
Briggs, B. H., Candy, B., Vincent, R. A.
core   +1 more source

The TIANSHAN Radio Experiment for Neutrino Detection

open access: yes, 2010
An antenna array devoted to the autonomous radio-detection of high energy cosmic rays is being deployed on the site of the 21 cm array radio telescope in XinJiang, China.
Abraham   +46 more
core   +5 more sources

Passive wireless antenna sensor for strain, temperature, crack and fatigue measurement [PDF]

open access: yes, 2014
An apparatus and method is provided for monitoring a condition of a structure using a passive wireless antenna sensor having a known resonant frequency when mounted on the structure.
Carter, Ronald L.   +3 more
core   +1 more source

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