本文探讨了da/dN-ΔK曲线和△K_(th)的测量及其数据处理方法,使其结果更可靠,并减少试验时间。由此提出了最佳曲线拟合法和变点递增多项式拟合求导法。给出了相应的计算机程序。 This article discusses the da / dN-ΔK curve and △ K_ (th) measurements and data processing methods to make the results more reliable and reduce the test time. Thus, the best curve fitting method and changing point increasing polynomial fitting derivation method are proposed. The corresponding computer program is given.