当振动运动距离静平衡位置最远时,速度为零,系统动能(偏离平衡的能量,最不平衡点,零动能(场力)为零,系统势能(恢复平衡(平衡点,
当振动运动距离静平衡位置最远时,速度为零,系统动能(偏离平衡的能量,最不平衡点,零动能(场力)为零,系统势能(恢复平衡(平衡点,零势能)的能量,场能)最大,系统偏离平衡和恢复平衡的路径千万条(虚功原理),但系统动能势能计算不受路径影响
http://www.docin.com/p-34362133.html
in stock mkt, system's max and min points are "checked" out by spikes, up spikes get shorts to cover, down spikes get long to cut loss, all triggered by stop loss order, which trades automatically at the next best price
