The method of analyzing buoy position drift and bump based on GPS is introduced in detail and the model of judgement for buoy bump is given.

详细介绍了基于GPS的浮标位置漂移、撞击分析方法，给出了浮标受撞击判断模型；

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In the role of the waves, the son buoys move along the center axis around the mother buoy, and there is no motion between the mother buoy and the son ones. And their relative position is fixed.

在海浪作用过程中，子浮标绕母浮标中心轴上下运动，子母浮标之间不存在周向运动，它们的相对位置是固定的。

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So he created his swim buoy to provide support in the shoulder to enable the spine to assume the correct position.

BBC: NEWS | Health | A bike for the paralysed