Results 71 to 80 of about 71,984 (299)
Adaptive widely linear processing for MIMO systems
Revista Tecnologia, 2010 Wireless communication systems using two or more transmit antennas and one or more receiving antennas have emerged in recent years. There are several reasons for this to be occurring, including: the increasing demand for high data rate, high user ...
Francisco José Alves de Aquino
doaj
Integrated design of active phased array for low-altitude detection radar
The Journal of Engineering, 2019 This article presents an integrated design of active phased array for low-altitude detection radar. Integrated design is an important method to realise miniaturisation and low cost.
Hao Wang +6 more
doaj +1 more source
A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems
International 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
Determination of horizontal and vertical wavelengths of gravity waves in the mesosphere by spaced wind measurements [PDF]
The reduction of spaced wind measurements taken over a range of heights is described. The equipment used is a medium frequency radar with one site consisting of a vertically pointing transmitter and space receiving antennas, and two remote receiving ...
Meek, C. E.
core +1 more source
Attitude Determination from Single-Antenna Carrier-Phase Measurements
, 2002 A model of carrier phase measurement (as carried out by a satellite navigation receiver) is formulated based on electromagnetic theory. The model shows that the phase of the open-circuit voltage induced in the receiver antenna with respect to a local ...
Bohnert J. I. +7 more
core +1 more source
β‐Catenin/c‐Myc Axis Modulates Autophagy Response to Different Ammonia Concentrations
Advanced Biology, Volume 9, Issue 3, March 2025.Ammonia, detoxified by the liver into urea and glutamine, impacts autophagy differently at varying levels. Low ammonia activates autophagy via c‐Myc and β‐catenin, while high levels suppress it. Using Huh7 cells and Spf‐ash mice, c‐Myc's role in cytoprotective autophagy is revealed, offering insights into hyperammonemia and potential therapeutic ...
S. Sergio +11 more
wiley +1 more source
The Journal of Engineering, 2019 A large aperture membrane phased array antenna with an array antenna and transmit/receive (T/R) modules is presented for geosynchronous Earth orbit synthetic aperture radar applications.
Mingming Xu +5 more
doaj +1 more source
Advanced Engineering Materials, Volume 27, Issue 6, March 2025.ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur +5 more
wiley +1 more source
Millimeter-wavelengths propagation studies Semiannaul status report [PDF]
Construction of two microwave band receiving antennas for ATS-E wavelength propagation ...
core +1 more source
Impedance matching and emission properties of optical antennas in a nanophotonic circuit
, 2008 An experimentally realizable prototype nanophotonic circuit consisting of a receiving and an emitting nano antenna connected by a two-wire optical transmission line is studied using finite-difference time- and frequency-domain simulations.
Biagioni, Paolo +3 more
core +1 more source