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Time frequency domain combined deconvolution method
In the process of seismic wave propagation, high-frequency energy is absorbed and attenuated by the stratum, and the dominant frequency and...
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Time-reassigned multisynchrosqueezing of the S-transform for seismic time-frequency analysis
To accurately capture the time-frequency spectral anomaly, a novel time-frequency analysis (TFA) method, termed as time-reassigned...
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High-resolution ground motion generation with time–frequency representation
Data-driven deep learning application in earthquake engineering highlights the insufficient quantity and the imbalanced feature distribution of...
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Microseismic signal denoising using simple bandpass filtering based on normal time–frequency transform
In active underground mining environments, monitoring mine vibrations has important implications for both safety and productivity. Microseismic data...
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Spatial correlations in time and frequency domains between chlorophyll-a concentration and environmental factors in the Bohai Sea
Based on the reconstructed MODIS data and ECMWF reanalysis data from 2003 to 2021, spatial correlations between chlorophyll a (Chl a ) and sea surface...
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Study of the characteristic response of shear waves in igneous reservoirs based on time–frequency coupled analysis method
Time–frequency analysis methods represent an efficacious approach to process data derived from full-waveform acoustic logging. This research proposes...
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Numerical investigation of the seismic dynamic response characteristics of high-steep layered granite slopes via time–frequency analysis
The geological structure and stratum lithology have important roles in the seismic stability of complex slopes; however, their roles complicate...
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A composite clock for robust time–frequency signal generation system onboard a navigation satellite
This research designs a robust time–frequency signal generation system based on the composite atomic clock onboard a navigation satellite, which...
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Numerical simulation and time-frequency analysis of borehole acoustic logging in fractured formations
Currently, using the finite difference method to simulate millimeter-sized fractures in formations requires intensive calculations. However, only the...
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PPPH-VA: an open‑source software for real-time multi-GNSS variometric approach using single- and dual-frequency observations
Variometric approach (VA) technique has been introduced as an alternative to real-time kinematics and real-time precise point positioning techniques....
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A data-driven method for time-varying wavelet extraction based on the local frequency spectrum
Seismic wavelet extraction always plays a central role in high-resolution seismic processing. Conventional methods assume that seismic data are...
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Filling the gap of seismic ambient noise taken from the earth by modification of the frequency content of the existing time series
Seismic ambient noise is increasingly important in estimating velocity and attenuation structures, as well as understanding parameter variations....
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Identification of thin gas reservoir in reflection seismic data by synchrosqueezing S-transform in time-frequency representation
Time-frequency seismic attributes extract important information from the seismic signals and exhibit valuable properties and seismic characteristics...
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Algorithms for time–frequency imaging and analysis: introduction to mixed-model spectral decomposition
Time–frequency algorithms help discern and filter hidden information from signals but their growing abundance induces non-uniqueness thus,...
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Isotopic analysis based on terahertz spectrum
As a new promising detection technology in the terahertz research field, the terahertz time-domain spectroscopy (THz-TDS) has very broad application...
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Satellite orbit determination and time synchronization using GPS single-frequency observables in low and high solar activities
We assess the orbit accuracy and time synchronization error using the L1 and C1 observables during the different solar activities. In general, GPS...
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Impact of offsets on assessing the low-frequency stochastic properties of geodetic time series
Understanding and modelling the properties of the stochastic variations in geodetic time series is crucial to obtain realistic uncertainties for...
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Multivariate Time and Frequency Domain Analysis
The time series is called multivariate here if the number \( M \) of its scalar components exceeds two. Multivariate models describe linear...
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Improving the visualization of rainfall trends using various innovative trend methodologies with time–frequency-based methods
In this paper, the Innovative Trend Methodology (ITM) and their inspired approaches, i.e., Double (D-ITM) and Triple (T-ITM), were combined with...
