<正>电力需求侧管理DSM是指通过采取有效的激励措施,引导电力用户改变用电方式,提高终端用电效率,优化资源配置,改善和保护环境,实现最小成本电力服务所进行的用电管理活动。

企业经济活动分析是企业进行经营决策的依据,也是提高企业经济效益的有力手段.尤其是对于投资巨大的电力企业,定期进行企业经济效益分析,既可检验前期工作的成效,判断企业发展的良性与否,也可为今后企业规划提供制定依据.主成分分析法的引入避免了因主观性过强造成的分析误差,可以更接近于企业实际的运行状况,对企业发展有着重要的现实意义.

实施电力DSM是一项投入产出活动.电力DSM的参与方,包括电力公司、节能公司、电力用户.加强DSM管理可以促进新兴产业的发展壮大,减少一次能源的消耗和污染物的排放,有利于缓解环境压力,促进经济健康稳定向前发展.

The basic concepts and the relating theorem were studied in this paper.Knowledge reduction is one of the most important contents of rough set theory.The attribute reduction algorithm based on the frequency of attributes used the degree of the attributes appear in the discernibility matrix as the heuristic information of attributes selection.According to the limitation of this algorithm,an improved algorithm was presented.Finally the validity of the improved algorithm was analyzed and demonstrated by the example.