A COMBINED USE OF FDM AND DOE METHOD TO DERIVE A NEW TRANSIENT SIMPLIFIED SEMI-ANALYTICAL MODEL: A CASE STUDY OF ANHYDRITE RADIANT SLABAbdelatif Merabtine, Abdelhamid Kheiri and Salim MokraouiMATEC Web Conf., 330 (2020) 01002DOI: https://doi.org/10.1051/matecconf/202033001002