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__    __   __   __    ______     ___      _____   
\ \\ / //  \ \\/ //  /_   _//   / _ \\   / ____|| 
 \ \/ //    \ ` //   `-| |,-   | / \ || / //---`' 
  \  //      | ||      | ||    | \_/ || \ \\___   
   \//       |_||      |_||     \___//   \_____|| 
    `        `-`'      `-`'     `---`     `----`

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發送短信 : Time-frequency and time-frequency-rate representations using the cross quadratic spectrum