The superiority of the classical least square method is lost due to the morbid of designed matrix in large-type linear regression analysis.
在大型线性回归分析中，由于设计矩阵的病态使得经典的最小二乘法失去了优良性。
Based on the mathematical model of circularity error, the least square method, minimum envelope zone method and harmonic analysis method for evaluating the circularity error are treated.
本文根据圆度误差的数学模型，论述了评定圆度误差的最小二乘法、最小区域法和谐波分析法。
Based on the generalized moving least square method, a new Element-Free Galerkin (EFG) double-variable approximation is applied to dynamic characteristic calculation and analysis of Euler beam.
以广义移动最小二乘法为理论基础，将同时考虑挠度和转角双变量的无单元法运用于欧拉梁的动力特性计算与分析。
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