上定更大字 SHANGHAI JLAO TONG UNIVERSITY u=-(sint+-sin 3t) T 1
sin 3 ) 3 1 (sin 4 u t + t =
上定更大字 SHANGHAI JLAO TONG UNIVERSITY u=-(sint+sin 3t +=sin 5t) T 5 0.5 2 1
sin5 ) 5 1 sin 3 3 1 (sin 4 u t + t + t =
上定更大字 SHANGHAI JLAO TONG UNIVERSITY u=-(sint +sin 3t +sin 5t +sin 7t) T 3 5
sin7 ) 7 1 sin5 5 1 sin 3 3 1 (sin 4 u t + t + t + t =
上定更大字 SHANGHAI JLAO TONG UNIVERSITY u=-(sint +sin 3t +=sin 5t +-sin7t+sin 9t T 3 5 .5 t u(t)=-(sint +sin 3t+=sin 5t+-sin7t+.) 3 (一π<t<π,t≠0)
sin7 ) 7 1 sin5 5 1 sin 3 3 1 (sin 4 ( ) + + + + u t = t t t t (− t ,t 0) sin9 ) 9 1 sin7 7 1 sin5 5 1 sin 3 3 1 (sin 4 u t + t + t + t + t =
上定更大字 SHANGHAI JLAO TONG UNIVERSITY 傅里叶级数展开式的意义—函数的整体逼近 1.5 0.5
傅里叶级数展开式的意义——函数的整体逼近