Results 41 to 50 of about 26,153,681 (361)

Balanced Homodyne Detector With Independent Phase Control and Noise Detection Branches

open access: yesIEEE Access, 2019
Squeezed state light is a fundamental resource for many quantum optics experiments. Important applications like quantum-enhanced magnetometer and quantum key distribution, require the squeezing level as high as possible.
Jinrong Wang   +6 more
doaj   +1 more source

Complete amplitude and phase control of light using broadband holographic metasurfaces. [PDF]

open access: yesNanoscale, 2017
Reconstruction of light profiles with amplitude and phase information, called holography, is an attractive optical technology with various significant applications such as three-dimensional imaging and optical data storage.
Gun-Yeal Lee   +8 more
semanticscholar   +1 more source

Performance evaluation of Photovoltaic Panels by a Proposed Automated System Based on Microcontrollers [PDF]

open access: yesEngineering and Technology Journal, 2021
In this paper, an automated test setup for PV panels using LabVIEW and several microcontrollers (μCs) based embedded systems has been designed, tested, and implemented.
Mustafa Q. Ali   +2 more
doaj   +1 more source

Direct control strategy for a four-level three-phase flying-capacitor inverter [PDF]

open access: yes, 2010
A direct predictive control strategy is proposed for a three-phase four-level flying-capacitor (FC) inverter in this paper. The balancing of the FC voltages, a challenge in applications with small capacitors and low switching frequencies, is done without
Llor, Ana-Maria   +2 more
core   +1 more source

Resonant control of a single-phase full-bridge unity power factor boost rectifier [PDF]

open access: yes, 2007
This work studies the dynamics of a single-phase full-bridge unity power factor boost AC-DC converter and develops a linear cascade resonant controller in order to meet two control objectives: to regulate the mean value of its DC output voltage and to ...
Costa Castelló, Ramon   +2 more
core   +2 more sources

A Calibration Method Based on Transfer Function Extraction for Cartesian Vector Modulator

open access: yesIEEE Access, 2020
In this paper, a calibration approach based on transfer function extraction for the Cartesian vector modulator (VM) is presented. Three kinds of VM models-the ideal VM model, the frequency-dependent VM model and the modified frequency-dependent VM model,
Chao Wang   +4 more
doaj   +1 more source

Phase-Controlled Thyristor Sub-Synchronous Damper Converter for a Liquefied Natural Gas Plant

open access: yesEnergies, 2021
In electrified liquefied natural gas (LNG) plants variable frequency drives (VFDs) interact with turbine-generator (TG) units creating torsional vibrations known as sub-synchronous torsional interactions (SSTIs). Torsional vibrations can be dangerous for
Lorenzo Bongini   +3 more
doaj   +1 more source

Micromirrors with controlled amplitude and phase [PDF]

open access: yesApplied Optics, 2017
This paper describes the fabrication of circular micromirrors with diameters between 50 and 150 μm with controlled amplitude and phase. Design, manufacturing, and characterization method are presented.
Julien, Lumeau   +2 more
openaire   +2 more sources

Tunable Liquid Crystal Based Phase Shifter with a Slot Unit Cell for Reconfigurable Reflectarrays in F-Band

open access: yesApplied Sciences, 2018
An electrically tuned phase shifter based on the single slot unit cell and liquid crystal for a reconfigurable reflectarray antenna was presented. The simulation and measured results obtained at the F-band were used to demonstrate that the dielectric ...
Sheng Gao   +7 more
doaj   +1 more source

A Comprehensive Review of Grid-Connected PV Systems Based on Impedance Source Inverter

open access: yesIEEE Access, 2022
The increase in linking photovoltaic (PV) power plants to utility grids are due to the world expansion in PV systems and its advantages of low running cost, renewable, etc. Although PV is now considered one of the main power sources in many countries, it
Ihab Jamal   +5 more
doaj   +1 more source

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