举例1:O(1)=0+KV(t) 返回 O()=1+k门(4)+ ( T 07677275%6Tt 07673273%6T举例 1 : v ( t ) f (V) 0 t 0 t ( t ) F 6 5 T 3 2 T 6 T 3 T 2 T T 21-1-2 C C − 2KF (t) K v (t) F =c + F f = + + t F t ct KF vf d 0 0 ( ) ( ) 0 t ( t ) F 6 T 3 T 2 T 3 2 T 6 5 T T 0 6T KF t c 返回