Results 21 to 30 of about 1,340,272 (265)

Three-Dimensional Reconstruction with a Laser Line Based on Image In-Painting and Multi-Spectral Photometric Stereo

open access: yesSensors, 2021
This paper presents a multi-spectral photometric stereo (MPS) method based on image in-painting, which can reconstruct the shape using a multi-spectral image with a laser line.
Liang Lu   +4 more
doaj   +1 more source

The Spectral Correlation Function -- A New Tool for Analyzing Spectral-Line Maps [PDF]

open access: yes, 1999
The "spectral correlation function" analysis we introduce in this paper is a new tool for analyzing spectral-line data cubes. Our initial tests, carried out on a suite of observed and simulated data cubes, indicate that the spectral correlation function [
Goodman, Alyssa A.   +3 more
core   +4 more sources

Data archive of the multi-channel infrared solar spectrograph(2001–2015)

open access: yes中国科学数据, 2022
The observation and study of solar spectrum can help us to know the physical parameters, such as the plasma velocity, electron temperatures, electron density, etc., of the line formation layers of solar atmosphere,
Yang Zherui   +4 more
doaj   +1 more source

A method to achieve spectral beam combining based on a novel symmetric grating

open access: yesFrontiers in Physics, 2022
A symmetric grating is proposed to obtain higher output power in spectral beam combination by increasing the number of lasers and spectral utilization. The grating allows laser beams to be incident from both sides of the grating normal to achieve coaxial
Xinmin Fan   +18 more
doaj   +1 more source

The molecular emission-line spectrum of IRC +10216 between 330 and 358 GHz [PDF]

open access: yes, 1994
We have conducted a spectral line survey of IRC + 10216 using the Caltech Submillimeter Observatory to an average sensitivity of ≾95 mK. A deconvolution algorithm has been used to derive the continuous single-sideband spectrum from 330.2 to 358.1 GHz ...
Blake, Geoffrey A.   +2 more
core   +1 more source

Diagnostic features of rutile and cassiterite from heavy mineral concentrate samples, according to the IR microscopy data

open access: yesРуды и металлы
Based on the study of rutile and cassiterite grains, using Fourier transform infrared microscopy, a new method for their determination in heavy mineral concentrate samples has been developed.
Khachatryan G. K., Anashkina N. E.
doaj   +1 more source

Spectral Power Enhancement in a 100 GHz Photonic Millimeter-Wave Generator Enabled by Spectral Line-by-Line Pulse Shaping

open access: yesIEEE Photonics Journal, 2010
We report generation of high-modulation-depth photonic millimeter-wave (MMW) waveforms by applying line-by-line pulse shaping on a phase-modulated continuous-wave frequency comb.
F.-M. Kuo   +8 more
doaj   +1 more source

Analysis of Infrared Spectral Radiance of O2 1.27 μm Band Based on Space-Based Limb Detection

open access: yesRemote Sensing, 2023
The infrared spectral radiance of O2 is of great significance for space-based infrared detection. In this work, based on the demand for near-infrared spectral radiance of O2 limb detection, a method of spectral radiance calculation coupled with an ...
Jingyu Bai   +4 more
doaj   +1 more source

Long-Term X-ray Spectral Variability in Seyfert 1 Galaxies

open access: yes, 2003
Direct time-resolved spectral fitting has been performed on continuous RXTE monitoring of seven Seyfert 1 galaxies in order to study their broadband spectral variability and Fe K alpha variability characteristics on time scales of days to years ...
A. Markowitz   +11 more
core   +1 more source

Evidence of the Amino Acids Tyrosine and Phenylalanine in the Interstellar Material of IC348 in Perseus

open access: yesLife
We employed data from the Spitzer Space Telescope to investigate the presence of the aromatic amino acids tyrosine and phenylalanine in the interstellar gas of the young star cluster IC 348.
Susana Iglesias-Groth   +3 more
doaj   +1 more source

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