Results 21 to 30 of about 28,422,071 (389)
Microwave Spectroscopy as a Potential Tool for Color Grading Diamonds
Energies, 2021 A diamond’s color grading is a dominant property that determines its market value. Its color quality is dependent on the light transmittance through the diamond and is largely influenced by nitrogen contamination, which induces a yellow/brown tint within
Yossi Rabinowitz +4 more
doaj +1 more source
Spectral mixture analysis of EELS spectrum-images [PDF]
, 2012 Recent advances in detectors and computer science have enabled the acquisition and the processing of multidimensional datasets, in particular in the field of spectral imaging.
Brun, Nathalie, Dobigeon, Nicolas
core +3 more sources
One-Bit LFMCW Radar: Spectrum Analysis and Target Detection [PDF]
IEEE Transactions on Aerospace and Electronic Systems, 2019 One-bit radar, performing signal sampling and quantization by a 1-bit analog-to-digital converter, is a promising technology for many civilian applications due to its low-cost and low-power consumptions.
Benzhou Jin +4 more
semanticscholar +1 more source
Reading Tapes Backwards: A Legitimate Approach to Saving Time and Money in Digitization Projects?
Applied Sciences, 2021 Audio carriers are subject to a fast and irreversible decay. In order to save valuable historical recordings, the audio signal and other relevant information can be extracted from the source audio document and stored on another medium, normally a ...
Federica Bressan +5 more
doaj +1 more source
Possible structure in the cosmic ray electron spectrum measured by the ATIC-2 and ATIC-4 experiments [PDF]
, 2011 A strong excess in a form of a wide peak in the energy range of 300-800 GeV was discovered in the first measurements of the electron spectrum in the energy range from 20 GeV to 3 TeV by the balloon-borne experiment ATIC (J. Chang et al.
Adams, Jr., J. H. +17 more
core +3 more sources
Proceedings of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 1998 A new method for analysing nonlinear and non-stationary data has been developed. The key part of the method is the ‘empirical mode decomposition’ method with which any complicated data set can be decomposed into a finite and often small number of ...
Norden E. Huang +8 more
semanticscholar +1 more source
Bio-Inspired Radio-Frequency Source Localization Based on Cochlear Cross-Correlograms
Frontiers in Neuroscience, 2021 This paper describes a bio-inspired radio frequency (RF) scene analysis system based on cross-correlating the outputs of two single-chip RF spectrum analyzers.
Yingying Wang +2 more
doaj +1 more source
A Sensing Error Aware MAC Protocol for Cognitive Radio Networks [PDF]
, 2011 Cognitive radios (CR) are intelligent radio devices that can sense the radio environment and adapt to changes in the radio environment. Spectrum sensing and spectrum access are the two key CR functions.
Hu, Donglin, Mao, Shiwen
core +2 more sources
Terahertz frequency spectrum analysis with a nanoscale antiferromagnetic tunnel junction [PDF]
Journal of Applied Physics, 2019 A method to perform spectrum analysis on low power signals between 0.1 and 10 THz is proposed. It utilizes a nanoscale antiferromagnetic tunnel junction (ATJ) that produces an oscillating tunneling anisotropic magnetoresistance, whose frequency is ...
P. Artemchuk +9 more
semanticscholar +1 more source
Functional singular spectrum analysis [PDF]
Stat, 2021 In this paper, we develop a new extension of the singular spectrum analysis (SSA) called functional SSA to analyze functional time series. The new methodology is constructed by integrating ideas from functional data analysis and univariate SSA. Specifically, we introduce a trajectory operator in the functional world, which is equivalent to the ...
Hossein Haghbin +4 more
openaire +3 more sources