Data mining is an important problem in KDD, and Rough set as a theory of set with fuzzy boundary is widely applied to infer classification rules from decision system.

数据挖掘是知识发现领域的一个重要问题，粗糙集理论是一种具有模糊边界的数据挖掘方法，它被广泛应用于决策系统的分类规则提取中。

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The boundary of a contains a nonempty open set.

的边界包含一个非空开集。

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Introducing the boundary conditions of the beam, a set of linear complementary equations is established of the beam on a rigid foundation in terms of foundation reactions and deflections.

通过引入梁的边界条件，建立起一组刚性地基梁关于地基反力和挠度的线性互补方程。

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Climate models simulate the statistical properties of the whole population of all possible climate realizations for a certain set of boundary conditions (which can change with time).

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The House managers will do everything they can to push across that boundary, confronting Lott with another set of difficult choices as he tries to grind the process to a halt without angering G.

CNN: Fasten your seat belts