機器學習定義:A computer program is said to learn from experience E with respect to some class of tasks T and performance measure P, if its performance at tasks in T, as measured by P, improves with experience E(一個程序從經驗E中學習解決任務T進行某一任務量度P,通過P測量在T的表現而提高經驗E(另一種定義