她显示了娴熟的触摸她的方向，她稀疏集和照明帮助我们感到索尼娅的绝望，同时仍然保持新鲜和黑暗的情绪喜剧。

She shows a deft touch with her direction, her sparse sets and lighting helping us to feel Sonia's despair, while still keeping the mood fresh and darkly comedic.

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针对协同过滤中的数据稀疏问题，提出了一种基于粗集的协同过滤算法。

Aiming at the problem of data sparsity for collaborative filtering, a novel rough set-based collaborative filtering algorithm is proposed.

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高维数据的稀疏性和“维灾”问题使得多数传统聚类算法失去作用，因此研究高维数据集的聚类算法己成为当前的一个热点。

The sparsity and the problem of the curse of dimensionality of high-dimensional data, make the most of traditional clustering algorithms lose their action in high-dimensional space.

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