信号与系统知识要点第一章 信号与系统单位阶跃信号 1,0()()0,0t t u t t ε≥⎧==⎨<⎩ 单位冲激信号 ,0()0,0()1t t t t δδ∞-∞⎧∞=⎧=⎨⎪⎪≠⎩⎨⎪=⎪⎩⎰ ()()d t t dtεδ=()()t d t δττε-∞=⎰()t δ的性质:()()(0)()f t t f t δδ=
I. Alfred Tennyson1. His literary position 铌高尼伯特台风路径a. Tennyson was recognized as the greatest poet in Victorian Age.b. He was made poet laureate in 1850 when Wordsworth died.2. His life (see textbook