摘要
该文基于非平稳性度量指标(NS)构造了检测回归模型参数变点的方法.在选择合适的参数估计方法和窗口大小的前提下,计算窗口内样本的残差序列及对应的NS值,通过判断窗口内残差序列的平稳性从而达到变点检测的目的.构造一系列二分段回归模型进行实验验证,结果表明该方法能够有效检测到二分段回归模型的变点位置,与其它方法的对比实验结果也表明了该方法在回归模型参数变点的检测中准确性更高.
This paper constructs a method to detect the change point of regression model parameters based on the non-stationary measurement index(NS).Under the premise of selecting the appropriate parameter estimation method and window size,the residual sequence of the sample in the window and the corresponding NS value are calculated by judging the stationarity of the residual sequence within the window to achieve the purpose of change point detection.A series of two-segment regression models are constructed for experimental verification.The results show that this method can effectively detect the position of the change point of the two-segment regression model.The experimental results of comparison with other methods also show that the method is more accurate in the detection of regression model parameter change points.
作者
郑金辉
余旌胡
丁义明
鲍泽宇
Zheng Jinhui;Yu Jinghu;Ding Yiming;Bao Zeyu(School of Science,Wuhan University of Technology,Wuhan 430070;Junior Class College,University of Science and Technology of China,Hefei 230026)
出处
《数学物理学报（A辑）》
CSCD
北大核心
2021年第4期1124-1134,共11页
Acta Mathematica Scientia
关键词
回归模型
变点检测
非平稳性度量
Regression model
Change point detection
Non-stationary measure.
