A novel hybrid extreme learning machine-grey wolf optimizer (ELM-GWO) model to predict compressive strength of concrete with partial replacements for cement. - Mahdi Shariati; Mohammad Saeed Mafipour; Behzad Ghahremani; Fazel Azarhomayun; Masoud Ahmadi; Trung Nguyen-Thoi; Ali Shariati (Eng. Comput., 2022)