# Improved non-contact variable-frequency AC impedance instrument for cement hydration and pore structure based on SVM calibration method

> Research article (Measurement, 2021) · cited 15× · AI/ML

**Wikidata**: [openalex:W3159811867](https://www.wikidata.org/wiki/openalex:W3159811867)  
**Source**: https://4ort.xyz/entity/improved-non-contact-variable-frequency-ac-impedance-instrument-for-cement-hydration-and-pore-structure-based-on-svm-cal