TY - JOUR T1 - Identification and frequency domain analysis of non-stationary and nonlinear systems using time-varying NARMAX models JO - International Journal of Systems Science PY - 2013/01/01 AU - He F AU - Wei H AU - Billings SA ED - DO - DOI: 10.1080/00207721.2013.860202 Y2 - 2024/10/23 ER -