群柱

It may take many years, and the most comparable precedents for today's crisis had nothing to do with homes.

这可能需要许多年，最类似的先例，今天的危机没有任何关系的家园。

It is shown by the analysis of its time complexity and completeness as well as the numerical experiment that the proposed algorithm can achieve the goal of completeness and rapid convergence.

对算法进行的时间复杂度和完备性分析以及数值实验表明，基于遗传算法的粗糙集属性约简算法具有完备、快速收敛等特点。