Array ( [0] => Array ( [title] => L20A [link] => https://www.youtube.com/embed/ZsZtA0uT2C0 ) [1] => Array ( [title] => L20B [link] => https://www.youtube.com/embed/57AjPgQRa_s ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - Lecture 20 | Spectral effect of large delays; Example: Neutral differential difference equations