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1.东华理工大学自然资源部环鄱阳湖区域矿山环境监测与治理重点实验室,江西 南昌,330013
2.东华理工大学测绘与空间信息工程学院,江西 南昌,330013
3.武汉大学卫星导航定位技术研究中心,湖北 武汉,430079
4.山东农业大学资源与环境学院,山东 泰安,271017
Received:02 March 2024,
Published:05 October 2025
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王乐洋,李志强,胡芳芳,等.顾及设计矩阵误差时间序列AR模型精度评定的Sieve块自助采样方法[J].武汉大学学报(信息科学版),2025,50(10):1957-1966.
WANG Leyang,LI Zhiqiang,HU Fangfang,et al.Sieve-Block Bootstrap Sampling Method for Precision Estimation of Time Series AR Model Considering Random Errors of Design Matrix Errors[J].Geomatics and Information Science of Wuhan University,2025,50(10):1957-1966.
王乐洋,李志强,胡芳芳,等.顾及设计矩阵误差时间序列AR模型精度评定的Sieve块自助采样方法[J].武汉大学学报(信息科学版),2025,50(10):1957-1966. DOI:10.13203/j.whugis20230288
WANG Leyang,LI Zhiqiang,HU Fangfang,et al.Sieve-Block Bootstrap Sampling Method for Precision Estimation of Time Series AR Model Considering Random Errors of Design Matrix Errors[J].Geomatics and Information Science of Wuhan University,2025,50(10):1957-1966. DOI:10.13203/j.whugis20230288
由于传统求解时间序列自回归(auto-regressive,AR)模型的最小二乘方法无法顾及设计矩阵误差,现有的AR模型迭代解法难以应用协方差传播率给出较为精确的精度评定公式。将块自助采样方法引入到AR模型精度评定研究中,并在其基础上借助Sieve 自助法的思想,定义了顾及设计矩阵误差AR模型精度评定的Sieve块自助采样方法。根据不同的分块准则和采样策略,给出了4种方法的重采样步骤。模拟实验结果表明,精度评定的Sieve块自助采样方法能够得到比最小二乘法、经典的AR模型迭代解法更加可靠的自回归系数标准差,具有更强的适用性。同时,北斗卫星精密钟差真实案例表明,所提出的Sieve移动块自助法、Sieve非重叠块自助法、Sieve圆形块自助法以及Sieve静止块自助法的均方根(root mean square,RMS)比总体最小二乘的RMS分别减小了70.25%、78.65%、70.89%和79.24%,进一步验证了所提算法的有效性和可靠性,为时间序列AR模型的精度评定问题提供了一种采样思路。
Objectives
2
The traditional least square method cannot take into account the random errors of design matrix when solving the time series auto-regressive (AR) model. In addition
it is difficult for the existing iterative method of AR model to use the propagation of variance and covariance to give the accurate precision estimation formula.
Methods
2
We introduce the block Bootstrap resampling method into the precision estimation research of the AR model
and on the basis of it
the principle of the Sieve Bootstrap is introduced. We define the Sieve-block Bootstrap sampling method for precision estimation of AR model conside‑ring random errors of design matrix. According to the different blocking criteria and sampling strategies
we give four detailed resampling procedures.
Results
2
The real case of BeiDou satellite navigation system satellite precision clock offsets shows that the root mean square (RMS) of Sieve-moving block Bootstrap method
Sieve-nonoverlapping block Bootstrap method
Sieve-circular block Bootstrap method and Sieve-stationary block Bootstrap method are compared with the RMS of total least squares method
decreased by 70.25%
78.65%
70.89% and 79.24%
respectively
.
Conclusions
2
The experimental results show that the Sieve-block Bootstrap sampling method can obtain more reliable autoregressive coefficient standard deviations than the least square method and the classical AR model iterative method
and it has stronger applicability.
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