关键词: 多目标进化算法, 多目标优化问题, 种群维护, 收敛性, 分布性

Abstract: Population maintenance is an important issue in multi-objective evolutionary algorithms.For the traditional methods only concentrate on the distribution of solutions，a population maintenance strategy with both diversity and convergence considered is proposed.This measure assigns fitness with relative convergent relationship during neighboring individuals，which compensated the “coarseness” of the simple Pareto dominance relation effectively，and controlled crowding degree with an adjustable neighborhood method.Comparing with NSGA-II and SPEA2，this algorithm can maintain diversity of the population effectively，and have a good convergence and running time.

Key words: multi-objective evolutionary algorithm, multi-objective optimal problem, population maintenance, convergence, diversity