發送短信

數:

提供者:

CAPTCHA:

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

Please enter what you see:

發送短信 : On the delay performance of selective-repeat ARQ for underwater acoustic channels