The existing occlusion models such as LOS and ROC are all based on the RCC (Region Connection Calculus) theory, which is not suitable for handling multi-dimensional objects.

LOS和ROC等现有的遮蔽关系模型都是基于RCC（区域连接演算）的，因而不能支持混合维空间对象。

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The formula of the two-dimensional multi-objects is derived, then composite EM scattering from the object on one-dimensional rough surface is studied.

推导出二维多物体目标的无网格法的计算公式，求解了一维粗糙面与目标的复合电磁散射。

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Ericsson speculated earlier this year about how this will play out in everyday life, where objects will have friends, post messages, follow other objects and engage in multi-dimensional dialogue, even cooking your dinner before you arrive home for the night.

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