Search
Search Results
-
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...
-
Statistical Analysis of Rainfall Intensity Frequency Considering Rainfall Time in the Diurnal Cycle
Rainfall intensity at a specific time is an important factor affecting the occurrence of combined sewer overflow (CSO). In this study, a statistical...
-
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...
-
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...
-
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,...
-
GNSS spoofing detection using a fuzzy classifier based on time–frequency analysis of the autocorrelation function
We present a method to detect spoofing attack in Global Navigation Satellite System signals for single antenna receivers based on autocorrelation...
-
Dual-frequency to five-frequency real-time precise point positioning using new BDS-3 PPP-B2b service
BeiDou global navigation satellite system (BDS-3), a developed GNSS by China, has the ability to support five different signals, including B1I, B3I,...
-
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...
-
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...
-
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...
-
Noise suppression of distributed acoustic sensing vertical seismic profile data based on time–frequency analysis
Distributed acoustic sensing (DAS) technology is a novel technology applied in vertical seismic profile (VSP) exploration, which has many advantages,...
-
-
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...
-
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...
-
Time-Varying Univariate and Bivariate Frequency Analysis of Nonstationary Extreme Sea Level for New York City
Bivariate frequency analysis is an emerging method for the assessment of compound floods, especially in coastal regions. Changing climate, which...
-
Undifferenced and uncombined GNSS time and frequency transfer with integer ambiguity resolution
Precise point positioning (PPP) has been a competitive global navigation satellite system (GNSS) technique for time and frequency transfer. However,...
-
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...
-
Continuous time and frequency transfer using robust GPS PPP integer ambiguity resolution method
GPS precise point positioning (PPP) technique has been widely used in time and frequency transfer. The performance of PPP can be improved if the...
-
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...
-
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...
