REGRESSIVE SOLUTION FOR QUANTITATIVE PHASE ANALYSIS BY X-RAY DIFFRACTION WITHOUT STANDARD SANPLES
无标样X射线衍射定量相分析的回归求解

用m个试样的测值,构成求k方程的差方和,将其对n个k值求极小(m>n),即令?sum from j=1 to m(M_j-sum from i=1 to n I_(ijk_s~i))~2/?k_s~i=0回归得出n个求k方程的各项系数.由△k=△_I~(-1)*△_M矩阵运算式解出n个k值,进而求得n个未知相量.利用回归降低总误差,以期克服多元方程求解过程中误差叠加的困难.方法应用于W_9Mo_3Cr_4V高速钢析出相的定量分析.