Finally, under suitable assumptions, we obtain the upper semicontinuity and the lower semicontinuity of second-order adjacent derivatives for the weak perturbation maps.

最后，在恰当的假设条件下，获得了弱扰动映射的二阶邻接导数的上半连续和下半连续性。

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Objective To study the balance control of upper limb during perturbation by the object held in hand and the affect of vision for recovery.

目的研究人手在握物受扰后的恢复过程以及整个过程中视觉对于神经肌肉控制系统的影响。

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