# A Fusion Frequency Feature Extraction Method for Underwater Acoustic Signal Based on Variational Mode Decomposition, Duffing Chaotic Oscillator and a Kind of Permutation Entropy

> Research article (Electronics, 2019) · cited 53× · AI/ML

**Wikidata**: [openalex:W2908450692](https://www.wikidata.org/wiki/openalex:W2908450692)  
**Source**: https://4ort.xyz/entity/a-fusion-frequency-feature-extraction-method-for-underwater-acoustic-signal-based-on-variational-mode-decomposition-duff