# Hierarchical Amplitude-Aware Permutation Entropy-Based Fault Feature Extraction Method for Rolling Bearings

> Research article (Entropy, 2022) · cited 25× · AI/ML

**Wikidata**: [openalex:W4214638076](https://www.wikidata.org/wiki/openalex:W4214638076)  
**Source**: https://4ort.xyz/entity/hierarchical-amplitude-aware-permutation-entropy-based-fault-feature-extraction-method-for-rolling-bearings