A5051145952- Image and Signal Denoising Methods
- Underwater Acoustics Research
- Blind Source Separation Techniques
- Chaos control and synchronization
- Neural Networks and Applications
- Machine Fault Diagnosis Techniques
- Noise Effects and Management
- Fractal and DNA sequence analysis
- Nonlinear Dynamics and Pattern Formation
- Structural Integrity and Reliability Analysis
- Complex Systems and Time Series Analysis
- Speech and Audio Processing
Xi'an University of Technology
2022-2024
The ship-radiated noise (SN) is easily affected by other hydroacoustic objects or complex ocean when it spreads through water. In order to reduce the impact from environment, a denoising method for SN based on optimized variational mode decomposition with snake optimization (SO-VMD) and dual-threshold criteria of correlation coefficient (CC) proposed in this paper. first step optimize parameter combination, that is, number K penalty factor α, (VMD) (SO) envelope entropy (EE). Then, input...
Fuzzy dispersion entropy (FuzDE) is a newly proposed metric, which combines the superior characteristics of fuzzy (FE) and (DE) in signal analysis. However, FuzDE only reflects feature from original signal, ignores hidden information on time scale. To address this problem, we introduce variable-step multiscale processing propose (VSMFuzDE), realizes characterization abundant scale information, not limited by length like traditional processing. The experimental results for both simulated...
In recent years, fuzzy dispersion entropy (FDE) has been proposed and used in the feature extraction of various types signals. However, FDE can only analyze a signal from single time scale during practical application ignores some important information. order to overcome this drawback, on basis FDE, paper introduces concept multiscale process proposes (MFDE), based which an MFDE-based method for ship-radiated noise is proposed. The experimental results simulated signals show that MFDE...