# A novel method based upon modified composite spectrum and relative entropy for degradation feature extraction of hydraulic pump

> Research article (Mechanical Systems and Signal Processing, 2018) · cited 40× · AI/ML

**Wikidata**: [openalex:W2811065118](https://www.wikidata.org/wiki/openalex:W2811065118)  
**Source**: https://4ort.xyz/entity/a-novel-method-based-upon-modified-composite-spectrum-and-relative-entropy-for-degradation-feature-extraction-of-hydraul