With the transmission of COVID-19 epidemic at home and abroad, this paper considers spread process in China, improves classic SEIR model, establishes a multistage time-delay control model (MTCM) for transmission. The MTCM divides into three periods: outbreak period, period steady period. classical improved SEQIR ? correspond to periods. was adopted yielded results that were consistent with obse...

time-delay identification is one of the most important parameters in designing controllers. in the cases where the number of inputs and outputs in a system are more than one, this identification is of great concern. in this paper, a novel autocorrelation-based scheme for the state variable time-delay identification for multi-input multi-output (mimo) system has been presented. this method is ba...