摘要
首先采用高精度的Lagrange多项式插值对聚合物无定形样品广角X衍射(WAXD)谱图的峰形进行拟合,得到的该聚合物无定形峰的函数,然后将该函数与Gauss-Cauchy函数结合,对该聚合物的WXAD图谱进行非线性最小二乘法分峰拟合,得到了较理想的结果,并讨论了分峰过程中初值的稳定性。
High-accuracy Lagrange polynomial was employed to fit the wide-angle X-ray diffraction （WAXD） curve of amorphous polymer sample, from which the function of amorphous peak of the polymer was obtained. Then the function was combined with Gauss-Cauchy function for peak resolution of the WAXD profile of the polymer by nonlinear least square method. The stability of the initial value of the peak resolution program was also studied.
出处
《实验室研究与探索》
CAS
2008年第2期39-41,88,共4页
Research and Exploration In Laboratory
关键词
计算机分峰法
广角X射线衍射谱图
多项式拟合
computer peak resolution method
wide-angle X-ray diffraction curve
polynomial fitting
