發送短信

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

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發送短信 : An optimal PMU placement method against measurement loss and branch outage