[{"title":"( 5 个子文件 4.34MB ) 清华大学方勇数字信号处理课件","children":[{"title":"数字信号处理-方勇","children":[{"title":"第二章.ppt <span style='color:#111;'> 2.12MB </span>","children":null,"spread":false},{"title":"第一章.ppt <span style='color:#111;'> 1.70MB </span>","children":null,"spread":false},{"title":"第四章.ppt <span style='color:#111;'> 143.50KB </span>","children":null,"spread":false},{"title":"第三章.ppt <span style='color:#111;'> 1.62MB </span>","children":null,"spread":false},{"title":"绪论.ppt <span style='color:#111;'> 237.00KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]