發送短信 : Trajectory-based flight scheduling for AirMetro in urban environments by conflict resolution

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