least-square value

基本解释

The paper propose the complex value U-D factorization based least square method to improve the numerical stability and the fault feature are obtained.
为了提高数值计算稳定性，进一步提出了基于复U-D分解的最小二乘参数估计方法，获得了变频调速系统的故障特征。
The total income of national economy and the amount of population are predicted with second-degree moving model and with the principle of least mean square fit error determining designated value N.
利用二次移动平均模型，引入均方拟合误差最小的原理确定出时段数N，对国民经济总收入、人口数量等项目进行了预测。