# A Gray Wolf Optimization-Based Improved Probabilistic Neural Network Algorithm for Surrounding Rock Squeezing Classification in Tunnel Engineering

> Research article (Frontiers in Earth Science, 2022) · cited 20× · AI/ML

**Wikidata**: [openalex:W4214575709](https://www.wikidata.org/wiki/openalex:W4214575709)  
**Source**: https://4ort.xyz/entity/a-gray-wolf-optimization-based-improved-probabilistic-neural-network-algorithm-for-surrounding-rock-squeezing-classifica