“…Next, we adopted modified sequence quadratic programming (SQP) [49], which combined the monitoring technology combining constraint condition and objective function and temporary expansion of the feasible domain method, and then put the data of concrete proportions and the corresponding tested compressive strength at each concrete age into the model. Afterwards, the 12 parameters, including S C , ss SL , ss FA , ss LF , i C , i SL , i FA , i LF , λ C , λ SL , λ FA , λ LF , could be calculated.…”