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

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發送短信 : Threshold variable selection via a L 1 penalty approach