The simulative experiment of dynamic image shows that the boundary of a hollow object can be well reached in the improved active contour model, and the model has a good anti-noise property.
对动态图像的仿真实验表明，改进后的主动轮廓线模型能很好地收敛到物体的凹陷边界，且具有良好的抗噪性。
A device used to raise sunken objects, consisting of a hollow structure that is submerged, attached tightly to the object, and pumped free of water.
浮船箱一种用于提起沉落于水中的物体的设备，由一个沉入水下的中空的结构构成，与落水物紧贴在一起并被抽空水。
A first building and a second building are connected by the hollow bridge, and the object can be conveyed between the two buildings.
通过空桥连接第一和第二建筑物，使得物体可在两栋建筑物之间输送。
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