# Degradation feature extraction of the hydraulic pump based on high-frequency harmonic local characteristic-scale decomposition sub-signal separation and discrete cosine transform high-order singular entropy

> Research article (Advances in Mechanical Engineering, 2016) · cited 13× · AI/ML

**Wikidata**: [openalex:W2470900426](https://www.wikidata.org/wiki/openalex:W2470900426)  
**Source**: https://4ort.xyz/entity/degradation-feature-extraction-of-the-hydraulic-pump-based-on-high-frequency-harmonic-local-characteristic-scale-decompo