normal equations system meaning in English

正规方程组

As we know , there exist some defects in solving normal equation system . in order to overcome the shortcomings , the singular - value decomposition method and its applications in direct solving the ill - conditioning observation equation are studied
最后针对法方程解算方法存在的缺点，主要研究了矩阵的奇异值分解技术在直接解算病态观测方程中的应用。