Articles with "using frequency" as a keyword



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Constraining Sedimentary Structure Using Frequency‐Dependent P Wave Particle Motion: A Case Study of the Songliao Basin in NE China

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Published in 2017 at "Journal of Geophysical Research"

DOI: 10.1002/2017jb014721

Abstract: Knowledge on sedimentary structure within a basin is of great importance for exploring petroleum resources and predicting strong ground motions caused by earthquakes. Although 3-D seismic data acquisition is common nowadays in petroleum industry, it… read more here.

Keywords: wave; structure; frequency dependent; using frequency ... See more keywords
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Multi-heterodyne two dimensional coherent spectroscopy using frequency combs

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Published in 2017 at "Scientific Reports"

DOI: 10.1038/s41598-017-14537-z

Abstract: Optical multi-dimensional coherent spectroscopy is a powerful technique for studying the structure, properties and ultrafast dynamics of atoms, molecules, semiconductor materials and complex systems. Current implementations of multi-dimensional coherent spectroscopy have long acquisition times and/or… read more here.

Keywords: dimensional coherent; frequency combs; coherent spectroscopy; spectroscopy ... See more keywords
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Optical fibre pressure sensing using a frequency modulated laser-based signal processing technique

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Published in 2023 at "Measurement Science and Technology"

DOI: 10.1088/1361-6501/accaff

Abstract: Range resolved interferometry (RRI) applied to the interrogation of an extrinsic Fabry–Perot based pressure sensor in laboratory and wind tunnel environments is presented. A simple, compact sensor head design was fabricated and subsequently characterised using… read more here.

Keywords: sensing using; fibre pressure; pressure; using frequency ... See more keywords
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Design of nonlinearly spaced phase-shifting algorithms using their frequency transfer function.

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Published in 2019 at "Applied optics"

DOI: 10.1364/ao.58.001134

Abstract: Here we show how to design phase-shifting algorithms (PSAs) for nonuniform/nonlinear (NL) phase-shifted fringe patterns using their frequency transfer function (FTF). Assuming that the NL phase steps are known, we introduce the desired zeroes in… read more here.

Keywords: transfer function; phase shifting; frequency transfer; using frequency ... See more keywords
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Text sentiment analysis using frequency-based vigorous features

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Published in 2019 at "China Communications"

DOI: 10.23919/jcc.2019.12.011

Abstract: Sentiment Analysis, an un-abating research area in text mining, requires a computational method for extracting useful information from text. In recent days, social media has become a really rich source to get information about the… read more here.

Keywords: analysis; sentiment; analysis using; text sentiment ... See more keywords