中文摘要：

群体同一化问题是影响GP性能的重要因素。文章分析了导致群体同一化问题的原因．并针对存在的问题提出了扰动算子。实验结果证明了该方法的有效性和先进性。

英文摘要：

The problem of population＇s identity is the important factor affecting GP＇s performance.In this paper,we analyze the cause of resulting population＇s identity,then we put forward disorder operator in order to resolve the problem of population＇s identity. Experimental results prove our method validity and advantage.