Construction of GM(2,1) Model for Oscillating Pitch Angle Series

• 作 者: Ji-hong Shen Xi-ren Zhao
• 出 处: 船舶与海洋工程学报：英文版
• 发表日期: 2002年1期
• 关键词: GM( 1 1) MODEL GM(2 1) MODEL method of minimum SQUARE simulation of SHIP PITCH G

GM(1, 1) is generally used in Grey System Theory which constructs an Ordinary Differential Equation for given se-ries. It is effective for monotone series, and its simulating effect is good and error is small. However, If the series dosen’ t havea propert