本函数用于多目标优化结果性能评估，能够判断算法优化结果的好坏，即优化结果分布是否均匀，是否满足多样性要求-This function is used to　uate the performance of multi-objective optimization results, optimization algorithm can determine the result is good or bad, that is, to optimize the distribution of results is uniform, meets the requirements of diversity