Results 21 to 30 of about 1,684,231 (305)

Measuring Quantum Optical Hamiltonians [PDF]

open access: yesPhysical Review Letters, 1998
We show how recent state-reconstruction techniques can be used to determine the Hamiltonian of an optical device that evolves the quantum state of radiation. A simple experimental setup is proposed for measuring the Liouvillian of phase-insensitive devices.
D'Ariano, G. M., Maccone, L.
openaire   +2 more sources

PPK PROCESSING TO BOOST UAS ACCURACY IN CADASTRAL MAPPING [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023
Unmanned Aerial Systems (UAS) are increasingly used in different applications, including 3D urban modelling, cadastral mapping, urban planning, GIS information system and other fields because of their advantages.
V. E. Oniga   +8 more
doaj   +1 more source

Author Correction: Animal model of assessing cerebrovascular functional reserve by imaging photoplethysmography

open access: yesScientific Reports, 2021
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Oleg V. Mamontov   +6 more
doaj   +1 more source

The stress and strain distribution in X10CrMoVNb9-1 power engineering steel after long time degradation studied by the ESPI system [PDF]

open access: yesBulletin of the Polish Academy of Sciences: Technical Sciences, 2022
Maintenance of assets and equipment in power plants is essential for their safety and is required to help the plant stay active. In this paper, the specimens manufactured from a pipe of X10CrMoVNb9-1 (P91) power engineering steel in the as-received state
Mateusz Kopec
doaj   +1 more source

Simultaneous laser vibrometry on multiple surfaces with a single beam system using range-resolved interferometry [PDF]

open access: yes, 2015
A novel range-resolved interferometric signal processing technique that uses sinusoidal optical frequency modulation is applied to multi-surface vibrometry, demonstrating simultaneous optical measurements of vibrations on two surfaces using a single ...
Adams, Alvin   +5 more
core   +1 more source

Frequency Selective Surface With Two Quasi-Independent Notch Frequencies

open access: yesIEEE Access, 2019
A double-layer frequency selective surface (FSS) built on FR4 substrate exhibiting two notch frequencies in the 0-10-GHz range is introduced. Recently published examples demonstrate that further research needs to be undergone for obtaining separate ...
Ladislau Matekovits   +2 more
doaj   +1 more source

Optical/NIR stellar absorption and emission-line indices from luminous infrared galaxies [PDF]

open access: yes, 2019
We analyze a set of optical-to-near-infrared long-slit nuclear spectra of 16 infrared-luminous spiral galaxies. All of the studied sources present H$_2$ emission, which reflects the star-forming nature of our sample, and they clearly display H I emission
Bonatto, Charles   +13 more
core   +3 more sources

IpDFT-Tuned Estimation Algorithms for PMUs: Overview and Performance Comparison

open access: yesApplied Sciences, 2021
The Interpolated Discrete Fourier Transform (IpDFT) is one of the most popular algorithms for Phasor Measurement Units (PMUs), due to its quite low computational complexity and its good accuracy in various operating conditions.
David Macii, Daniel Belega, Dario Petri
doaj   +1 more source

Compact silicon photonics circuit to extract multiple parameters for process control monitoring [PDF]

open access: yes, 2020
We present a compact interferometer circuit to extract multiple model parameters of on-chip waveguides and directional couplers from optical measurements.
Bogaerts, Wim   +5 more
core   +2 more sources

Light scattering and absorption properties of dust particles retrieved from satellite measurements [PDF]

open access: yes, 2008
We use the radiative transfer model and chemistry transport model to improve our retrievals of dust optical properties from satellite measurements. The optical depth and absorbing optical depth of mineral dust can be obtained from our improved retrieval ...
Hu, R-M., Sokhi, R.S.
core   +1 more source

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