Attribute reduction in rough set theory is a NP-hard problem, which is studied mainly to design a more efficient algorithm.

粗糙集的属性约简是一个NP难问题，获得较为高效的算法是研究的主要目的。

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Based on the homotopy idea, an improved homotopy algorithm was proposed in order to search a more efficient algorithm for nonlinear least squares adjustment.

为了寻求一种更有效的非线性最小二乘平差算法，根据同伦思想提出了一种改进的同伦算法。

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This algorithm tends to be memory efficient (allocating what's necessary) but requires more time to manage the heap.

这种算法通常具有较高的内存使用效率(分配需要的内存)，但是却需要花费更多时间来对堆进行管理。

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Where those pieces, I would do the same thing with, I would divide them up into smaller chunks, and sort those. Is that going to give me a more efficient algorithm?

合并起来，而那些小列表,我又会把他们拆成更小的列表,再排序，这会给我,一个更高效的算法么？

麻省理工公开课 - 计算机科学及编程导论课程节选