| 易华,谢沐玄.投影方法在线性最小二乘问题中的应用[J].井冈山大学自然版,2015,(6):21-23 |
| 投影方法在线性最小二乘问题中的应用 |
| THE APPLICATION OF PROJECTION METHOD FOR LEAST SQUARES PROBLEMS |
| 投稿时间：2015-07-04 修订日期：2015-09-12 |
| DOI：10.3969/j.issn.1674-8085.2015.06.005 |
| 中文关键词: 最小二乘问题 加权线性最小二乘问题 正交投影算子 法方程 |
| 英文关键词: least squares problems weighted linear least squares problems orthogonal projection operators normal equation |
| 基金项目:吉安市科技计划项目(吉市科计字[2014]36号13);井冈山大学博士科研启动基金项目(JZB1304) |
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| 摘要点击次数: 2012 |
| 全文下载次数: 3191 |
| 中文摘要: |
| 采用正交投影方法推导了最小二乘问题的法方程。首先求出了到最小二乘问题系统矩阵的列空间的正交投影矩阵,然后根据正交投影的性质求出了最小二乘问题的解。该方法可以迁移到带有权重的最小二乘问题。 |
| 英文摘要: |
| Projection operators or projectors play an important role in numerical linear algebra, particularly in iterative methods for solving various matrix problems. The method of least squares is a standard approach in regression analysis. The projection method is exploited to deduce the normal equation of linear least squares problems. Furthermore, it is easy to use the projection method to solve the weighted linear least squares problems. |
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