Articles with "frequency components" as a keyword



A frequency estimation method for two adjacent frequencies

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Published in 2020 at "Measurement"

DOI: 10.1016/j.measurement.2020.107614

Abstract: Abstract The frequency-domain estimation methods are estimate frequency from main-lobe. One shortcoming of these methods lies in the fact that they are not suited to two adjacent frequency components. When the distance between two frequency… read more here.

Keywords: estimation; frequency components; frequency; two adjacent ... See more keywords

Forecasting Stock Price Based on Frequency Components by EMD and Neural Networks

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Published in 2020 at "IEEE Access"

DOI: 10.1109/access.2020.3037681

Abstract: Predicting stock price based on the features of raw data has been a significant but challenging task for researchers. Various frequency components of the raw stock price series represent characteristics of stock prices in different… read more here.

Keywords: price based; frequency components; stock price; stock ... See more keywords

Sand Bodies Delineation by Fusing Multifrequency Attributes via t-SNE

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Published in 2023 at "IEEE Geoscience and Remote Sensing Letters"

DOI: 10.1109/lgrs.2023.3243005

Abstract: Multifrequency attribute analysis is an effective tool to delineate sand bodies with different thicknesses. Conventionally, red–green–blue (RGB) blending technique is often used to fuse three frequency components for depicting reservoir thicknesses, that is, the low-,… read more here.

Keywords: fusing multifrequency; multifrequency; sand bodies; frequency components ... See more keywords

Seismic Multichannel Deconvolution via 2-D K-SVD and MSD-oCSC

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Published in 2024 at "IEEE Transactions on Geoscience and Remote Sensing"

DOI: 10.1109/tgrs.2024.3357057

Abstract: The deconvolution method is crucial for enhancing seismic resolution. Traditional multichannel schemes incorporate lateral constraints to enhance data continuity and integrity. However, a predominant challenge is that many existing methods assume that the estimated model… read more here.

Keywords: frequency components; frequency; multichannel deconvolution; deconvolution ... See more keywords

Image Fusion of CT and MR with Sparse Representation in NSST Domain

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Published in 2017 at "Computational and Mathematical Methods in Medicine"

DOI: 10.1155/2017/9308745

Abstract: Multimodal image fusion techniques can integrate the information from different medical images to get an informative image that is more suitable for joint diagnosis, preoperative planning, intraoperative guidance, and interventional treatment. Fusing images of CT… read more here.

Keywords: image; frequency components; nsst domain; sparse representation ... See more keywords
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The cross-over frequency between pulse and high-frequency components of near-fault forward-directivity ground motions

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Published in 2020 at "Advances in Structural Engineering"

DOI: 10.1177/1369433220911139

Abstract: Due to the scarcity of near-fault records with forward-directivity effects, synthetic near-fault pulse-like ground motions through superimposing pulse models and high-frequency components are commonly used in the earthquake engineering. However, in existing studies, the cross-over… read more here.

Keywords: frequency components; high frequency; frequency; near fault ... See more keywords
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Independent acoustic variation of the higher- and lower-frequency components of biphonic calls can facilitate call recognition and social affiliation in killer whales

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Published in 2020 at "PLoS ONE"

DOI: 10.1371/journal.pone.0236749

Abstract: Each resident-type (R-type) killer whale pod has a set of stereotyped calls that are culturally transmitted from mother to offspring. The functions of particular call types are not yet clearly understood, but it is believed… read more here.

Keywords: higher frequency; frequency components; lower frequency; frequency ... See more keywords

Temporal relationships among changes in the RR‐interval and the powers of the low‐ and high‐frequency components of heart rate variability in normal subjects

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Published in 2023 at "Physiological Reports"

DOI: 10.14814/phy2.15557

Abstract: Spectral analysis of heart rate variability (HRV) is widely used as a non‐invasive method to assess the cardiovascular autonomic function. Of the two main frequency components of HRV, namely low‐frequency (LF, 0.04–0.15 Hz) and high‐frequency (HF,… read more here.

Keywords: frequency components; frequency; heart rate; rate variability ... See more keywords

Capturing the power of seizures: an empirical mode decomposition analysis of epileptic activity in the mouse hippocampus

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Published in 2023 at "Frontiers in Molecular Neuroscience"

DOI: 10.3389/fnmol.2023.1121479

Abstract: Introduction Various methods have been used to determine the frequency components of seizures in scalp electroencephalography (EEG) and in intracortical recordings. Most of these methods rely on subjective or trial-and-error criteria for choosing the appropriate… read more here.

Keywords: seizure; frequency components; frequency; power ... See more keywords

THE ATTENUATION CHARACTERISTICS OF DIFFERENT FREQUENCY COMPONENTS OF ACOUSTIC EMISSION SIGNAL DURING PROPAGATION IN ELM AND PINE WOOD

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Published in 2024 at "Wood Research"

DOI: 10.37763/wr.1336-4561/69.4.647660

Abstract: In order to gain a deeper understanding of the attenuation characteristics of different frequency components of acoustic emission signal when propagating in wood, this research conduct pencil lead fracture experiments on the surface of elm… read more here.

Keywords: frequency components; propagation; attenuation characteristics; acoustic emission ... See more keywords