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|      \\  /_   _// | \  / ||   / _ \\    ____    
|  --  //   -| ||-  |  \/  ||  / //\ \\  |    \\  
|  --  \\   _| ||_  | .  . || |  ___  || | [] ||  
|______//  /_____// |_|\/|_|| |_||  |_|| |  __//  
`------`   `-----`  `-`  `-`  `-`   `-`  |_|`-`   
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發送短信 : Performance analysis of queue length monitoring of M/G/1 systems