NSGA是基于对个体的几层分级实现的。在选择执行 前,群体根据支配与非支配关系来排序:所有非支配个体被排成一类,这些被分级的个体共享它们的虚拟适应度值。然 后,忽略这组已分级的个体,对种群中的其它个体按照支配与非支配关系再进行分级,该过程继续直到群体中的所有个体被分级。(The NSGA is based on the individual layers of grading. Before selecting execution groups, according to govern with the dominant relationship to sort: all non dominant individuals are arranged into a class, these is classification of individuals to share their virtual fitness values. , then ignore this group has been graded individuals, to other individuals in population according to the dominant and the dominated relationship to classification, the process to continue until all in the group is graded.)