3 . in order to improve searching quality of restricting optimization , good and bad gene code method has been brought forward . its focus lays in emphasizing the value of gene to targets and more precisely simulate evolvement mechanism so that useful information in problem space will be used completely 为提高约束优化的搜索质量,提出了基因优劣编码,其重点是精确模拟自然进化机制,着重强调各基因位对优化目标的价值作用,越有利于优化目标的基因位越有价值,从而使问题空间的有益信息得到了充分利用。