# A prediction model for keyhole geometry and acoustic signatures during variable polarity plasma arc welding based on extreme learning machine

> Research article (Sensor Review, 2016) · cited 31× · AI/ML

**Wikidata**: [openalex:W2460912630](https://www.wikidata.org/wiki/openalex:W2460912630)  
**Source**: https://4ort.xyz/entity/a-prediction-model-for-keyhole-geometry-and-acoustic-signatures-during-variable-polarity-plasma-arc-welding-based-on-ext