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

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發送短信 : HYBRID DYNAMICS OF NONSMOOTH MECHANICAL SYSTEMS: MODELING, SIMULATION, AND DESIGN OF LEGGED ROBOTS