Application of artificial neural network in precise prediction of cement elements percentages based on the neutron activation analysisE. Eftekhari Zadeh, S. A. H. Feghhi, G. H. Roshani and A. RezaeiEur. Phys. J. Plus, 131 5 (2016) 167DOI: https://doi.org/10.1140/epjp/i2016-16167-6