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 /  ___||   / _ \\  | \  / ||   / _ \\   / ____|| 
| // __    / //\ \\ |  \/  ||  | / \ || / //---`' 
| \\_\ || |  ___  ||| .  . ||  | \_/ || \ \\___   
 \____//  |_||  |_|||_|\/|_||   \___//   \_____|| 
  `---`   `-`   `-` `-`  `-`    `---`     `----`

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發送短信 : Fast algorithms for minor component analysis