# Operational Efficiency Evaluation of Iron Ore Logistics at the Ports of Bohai Bay in China: Based on the PCA-DEA Model

> Research article (Mathematical Problems in Engineering, 2016) · cited 30× · AI/ML

**Wikidata**: [openalex:W2225157600](https://www.wikidata.org/wiki/openalex:W2225157600)  
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