这里所及的都是在实践中遇到的实际问题。通过讨论分析及实验证实,这些奇怪的曲线是受到外界或内部的干扰造成的。其假象足以使人们在分析曲线时造成错觉甚至得出错误的结论。因此,有必要总结这些有益的经验教训,并希望能对今后的工作有所帮助。 All that is touched here is the practical problem encountered in practice. Through the discussion and analysis and experiments confirmed that these strange curves are caused by external or internal interference. The illusion is enough to make people in the analysis of the curve caused by the illusion or even draw the wrong conclusion. Therefore, it is necessary to summarize these useful lessons and hopefully it will be helpful for future work.